org.eclipse.mylyn.web.tasks/src/org/eclipse/mylyn/internal/web/tasks/WebQueryWizardPage.java - mylyn/org.eclipse.mylyn.incubator - Git at Google

 /*******************************************************************************
  * Copyright (c) 2004, 2009 Eugene Kuleshov 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:
  *     Eugene Kuleshov - initial API and implementation
  *******************************************************************************/

 package org.eclipse.mylyn.internal.web.tasks;

 import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;

 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.MultiStatus;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.core.runtime.jobs.Job;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.dialogs.IMessageProvider;
 import org.eclipse.jface.fieldassist.ControlDecoration;
 import org.eclipse.jface.viewers.ILabelProviderListener;
 import org.eclipse.jface.viewers.IStructuredContentProvider;
 import org.eclipse.jface.viewers.ITableLabelProvider;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.mylyn.internal.provisional.commons.ui.CommonUiUtil;
 import org.eclipse.mylyn.internal.provisional.commons.ui.WorkbenchUtil;
 import org.eclipse.mylyn.tasks.core.IRepositoryQuery;
 import org.eclipse.mylyn.tasks.core.TaskRepository;
 import org.eclipse.mylyn.tasks.core.data.TaskData;
 import org.eclipse.mylyn.tasks.core.data.TaskDataCollector;
 import org.eclipse.mylyn.tasks.core.data.TaskMapper;
 import org.eclipse.mylyn.tasks.ui.wizards.AbstractRepositoryQueryPage;
 import org.eclipse.osgi.util.NLS;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ModifyEvent;
 import org.eclipse.swt.events.ModifyListener;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableColumn;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.browser.IWorkbenchBrowserSupport;
 import org.eclipse.ui.forms.events.ExpansionAdapter;
 import org.eclipse.ui.forms.events.ExpansionEvent;
 import org.eclipse.ui.forms.widgets.ExpandableComposite;
 import org.eclipse.ui.forms.widgets.FormToolkit;

 /**
  * Wizard page for configuring and preview web query
  *
  * @author Eugene Kuleshov
  */
 public class WebQueryWizardPage extends AbstractRepositoryQueryPage {

 	private Text queryUrlText;

 	private Text queryPatternText;

 	private TableViewer previewTable;

 	private String webPage;

 	private UpdatePreviewJob updatePreviewJob;

 	private final FormToolkit toolkit = new FormToolkit(Display.getCurrent());

 	private ParametersEditor parametersEditor;

 	private Map<String, String> oldProperties;

 	private final ArrayList<ControlDecoration> decorations = new ArrayList<ControlDecoration>();

 	private Text title;

 	public WebQueryWizardPage(TaskRepository repository, IRepositoryQuery query) {
 		super(Messages.WebQueryWizardPage_New_web_query, repository, query);
 		setTitle(Messages.WebQueryWizardPage_Create_web_query);
 		setDescription(Messages.bind(Messages.WebQueryWizardPage_Specify_query_parameters_for_X,
 				repository.getRepositoryUrl()));
 	}

 	@Override
 	public void dispose() {
 		for (ControlDecoration decoration : decorations) {
 			decoration.dispose();
 		}
 		super.dispose();
 	}

 	private static String getDefaultQueryTitle(TaskRepository repository) {
 		String label = repository.getRepositoryLabel();
 		String title = label;
 		for (int n = 1; hasQueryWithTitle(repository, title); n++) {
 			title = label + " " + n;
 		}
 		return title;
 	}

 	@SuppressWarnings("restriction")
 	private static boolean hasQueryWithTitle(TaskRepository repository, String title) {
 		Set<org.eclipse.mylyn.internal.tasks.core.RepositoryQuery> queries = org.eclipse.mylyn.internal.tasks.ui.TasksUiPlugin.getTaskList()
 				.getRepositoryQueries(repository.getRepositoryUrl());
 		for (IRepositoryQuery query : queries) {
 			if (query.getSummary().equals(title)) {
 				return true;
 			}
 		}
 		return false;
 	}

 	private void createTitleGroup(Composite parent) {
 		Composite group = new Composite(parent, SWT.NONE);

 		GridLayout layout = new GridLayout(2, false);
 		group.setLayout(layout);

 		GridData gd = new GridData(GridData.FILL_HORIZONTAL);
 		gd.horizontalSpan = 1;
 		group.setLayoutData(gd);

 		Label label = new Label(group, SWT.NONE);
 		label.setText(Messages.WebQueryWizardPage_Query_Title_);

 		title = new Text(group, SWT.BORDER);
 		title.setLayoutData(new GridData(GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL));
 		title.setText(getQuery() == null ? getDefaultQueryTitle(getTaskRepository()) : getQuery().getSummary());
 		title.addModifyListener(new ModifyListener() {
 			public void modifyText(ModifyEvent e) {
 				setPageComplete(isPageComplete());
 			}
 		});
 		title.setFocus();
 	}

 	@Override
 	public String getQueryTitle() {
 		return (title != null) ? title.getText() : null;
 	}

 	public void createControl(Composite parent) {
 		final Composite composite = new Composite(parent, SWT.NONE);
 		GridLayout gridLayout = new GridLayout();
 		gridLayout.marginHeight = 0;
 		gridLayout.marginWidth = 0;
 		gridLayout.verticalSpacing = 0;
 		gridLayout.numColumns = 1;
 		composite.setLayout(gridLayout);

 		if (!inSearchContainer()) {
 			createTitleGroup(composite);
 		}

 		parametersEditor = new ParametersEditor(composite, SWT.NONE);
 		GridData gridData1 = new GridData(SWT.FILL, SWT.FILL, true, true);
 		gridData1.minimumHeight = 90;
 		parametersEditor.setLayoutData(gridData1);

 		ExpandableComposite expComposite = toolkit.createExpandableComposite(composite, ExpandableComposite.COMPACT
 				| ExpandableComposite.TWISTIE);
 		expComposite.setFont(parent.getFont());
 		GridData gridData_1 = new GridData(SWT.FILL, SWT.FILL, true, false);
 		gridData_1.heightHint = 150;
 		gridData_1.minimumHeight = 150;
 		expComposite.setLayoutData(gridData_1);
 		expComposite.setBackground(parent.getBackground());
 		expComposite.setText(Messages.WebQueryWizardPage_Advanced_Configuration);
 		expComposite.addExpansionListener(new ExpansionAdapter() {
 			@Override
 			public void expansionStateChanged(ExpansionEvent e) {
 				getControl().getShell().pack();
 			}
 		});
 		toolkit.paintBordersFor(expComposite);

 		Composite composite1 = toolkit.createComposite(expComposite, SWT.BORDER);
 		composite1.setLayout(new GridLayout(3, false));
 		expComposite.setClient(composite1);

 		toolkit.createLabel(composite1, Messages.WebQueryWizardPage_Query_URL_, SWT.NONE);

 		queryUrlText = new Text(composite1, SWT.BORDER);
 		final GridData gridData_2 = new GridData(SWT.FILL, SWT.CENTER, true, false);
 		gridData_2.widthHint = 200;
 		queryUrlText.setLayoutData(gridData_2);
 		queryUrlText.addModifyListener(new ModifyListener() {
 			public void modifyText(final ModifyEvent e) {
 				webPage = null;
 			}
 		});
 		decorations.add(WebContentProposalProvider.createDecoration(queryUrlText, parametersEditor, false));

 		Button button = new Button(composite1, SWT.NONE);
 		button.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false));
 		button.setText(Messages.WebQueryWizardPage_Open);
 		button.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				openBrowser();
 			}
 		});

 		Label queryPatternLabel = toolkit.createLabel(composite1, Messages.WebQueryWizardPage_Query_Pattern_, SWT.NONE);
 		queryPatternLabel.setLayoutData(new GridData(SWT.LEFT, SWT.TOP, false, false));

 		queryPatternText = new Text(composite1, SWT.V_SCROLL | SWT.MULTI | SWT.BORDER | SWT.WRAP);
 		GridData gridData = new GridData(SWT.FILL, SWT.TOP, true, false);
 		gridData.widthHint = 200;
 		gridData.heightHint = 60;
 		queryPatternText.setLayoutData(gridData);
 		decorations.add(WebContentProposalProvider.createDecoration(queryPatternText, parametersEditor, true));

 		Button preview = new Button(composite1, SWT.NONE);
 		preview.setLayoutData(new GridData(SWT.FILL, SWT.TOP, false, false));
 		preview.setText(Messages.WebQueryWizardPage_Preview);
 		preview.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(final SelectionEvent e) {
 				webPage = null;
 				updatePreview();
 			}
 		});

 		previewTable = new TableViewer(composite1, SWT.BORDER);
 		// previewTable = new Table(composite1, SWT.BORDER);
 		GridData gridData2 = new GridData(SWT.FILL, SWT.FILL, false, true, 3, 1);
 		gridData2.heightHint = 60;

 		Table table = previewTable.getTable();
 		table.setLayoutData(gridData2);
 		table.setLinesVisible(true);
 		table.setHeaderVisible(true);

 		TableColumn colId = new TableColumn(table, SWT.NONE);
 		colId.setWidth(100);
 		colId.setText(Messages.WebQueryWizardPage_Id);

 		TableColumn colDescription = new TableColumn(table, SWT.NONE);
 		colDescription.setWidth(200);
 		colDescription.setText(Messages.WebQueryWizardPage_Description);

 		TableColumn colStatus = new TableColumn(table, SWT.NONE);
 		colStatus.setText(Messages.WebQueryWizardPage_Status);
 		colStatus.setWidth(80);

 		TableColumn colType = new TableColumn(table, SWT.NONE);
 		colType.setText(Messages.WebQueryWizardPage_Type);
 		colType.setWidth(80);

 		TableColumn colOwner = new TableColumn(table, SWT.NONE);
 		colOwner.setText(Messages.WebQueryWizardPage_Owner);
 		colOwner.setWidth(120);

 		previewTable.setColumnProperties(new String[] { "Id", "Description", "Status", "Type", "Owner" }); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
 		previewTable.setContentProvider(new IStructuredContentProvider() {

 			public void dispose() {
 			}

 			public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 			}

 			public Object[] getElements(Object inputElement) {
 				if (inputElement instanceof Collection<?>) {
 					return ((Collection<?>) inputElement).toArray();
 				}
 				return new Object[0];
 			}
 		});

 		previewTable.setLabelProvider(new ITableLabelProvider() {

 			public String getColumnText(Object element, int columnIndex) {
 				TaskMapper task = (TaskMapper) element;
 				switch (columnIndex) {
 				case 0:
 					return task.getTaskData().getTaskId();
 				case 1:
 					return task.getSummary();
 				case 2:
 					return task.getCompletionDate() != null ? Messages.WebQueryWizardPage_complete
 							: Messages.WebQueryWizardPage_incomplete;
 				case 3:
 					return task.getTaskKind();
 				case 4:
 					return task.getOwner();
 				}
 				return null;
 			}

 			public Image getColumnImage(Object element, int columnIndex) {
 				return null;
 			}

 			public void addListener(ILabelProviderListener listener) {
 			}

 			public void dispose() {
 			}

 			public boolean isLabelProperty(Object element, String property) {
 				return false;
 			}

 			public void removeListener(ILabelProviderListener listener) {
 			}
 		});

 		setControl(composite);

 		LinkedHashMap<String, String> vars = new LinkedHashMap<String, String>();
 		Map<String, String> params = new LinkedHashMap<String, String>();
 		if (getTaskRepository() != null) {
 			queryUrlText.setText(addVars(vars, getTaskRepository().getProperty(
 					WebRepositoryConnector.PROPERTY_QUERY_URL)));
 			queryPatternText.setText(addVars(vars, getTaskRepository().getProperty(
 					WebRepositoryConnector.PROPERTY_QUERY_REGEXP)));

 			oldProperties = getTaskRepository().getProperties();
 			params.putAll(oldProperties);
 		}
 		IRepositoryQuery query = getQuery();
 		if (query != null) {
 			setTitle(query.getSummary());
 			queryUrlText.setText(addVars(vars, query.getAttribute(WebRepositoryConnector.KEY_QUERY_TEMPLATE)));
 			queryPatternText.setText(addVars(vars, query.getAttribute(WebRepositoryConnector.KEY_QUERY_PATTERN)));
 			params.putAll(WebRepositoryConnector.getQueryParams(query));
 		}
 		parametersEditor.addParams(params, vars);

 		Dialog.applyDialogFont(composite);
 	}

 	private static String addVars(LinkedHashMap<String, String> vars, String property) {
 		if (property == null) {
 			return ""; //$NON-NLS-1$
 		}
 		for (String var : WebRepositoryConnector.getTemplateVariables(property)) {
 			vars.put(var, ""); //$NON-NLS-1$
 		}
 		return property;
 	}

 	synchronized void updatePreview() {
 		if (updatePreviewJob == null) {
 			updatePreviewJob = new UpdatePreviewJob(Messages.WebQueryWizardPage_Updating_preview);
 			updatePreviewJob.setPriority(Job.DECORATE);
 		}
 		updatePreviewJob.setParams(queryUrlText.getText(), queryPatternText.getText(), parametersEditor.getParameters());
 		if (!updatePreviewJob.isActive()) {
 			updatePreviewJob.schedule();
 		}
 	}

 	protected void openBrowser() {
 		final String url = queryUrlText.getText();
 		final Map<String, String> params = parametersEditor.getParameters();

 		new Job("Opening Browser") {
 			@Override
 			protected IStatus run(IProgressMonitor monitor) {
 				final String evaluatedUrl = WebRepositoryConnector.evaluateParams(url, params, getTaskRepository());
 				try {
 					String webPage = WebRepositoryConnector.fetchResource(evaluatedUrl, params, getTaskRepository());
 					File webPageFile = File.createTempFile("mylyn-web-connector", ".html");
 					webPageFile.deleteOnExit();

 					FileWriter w = new FileWriter(webPageFile);
 					try {
 						w.write(webPage);
 					} finally {
 						w.close();
 					}

 					final String location = webPageFile.toURI().toURL().toString();
 					Display.getDefault().asyncExec(new Runnable() {
 						public void run() {
 							WorkbenchUtil.openUrl(location, IWorkbenchBrowserSupport.AS_EXTERNAL);
 						}
 					});
 				} catch (final Exception e) {
 					Display.getDefault().asyncExec(new Runnable() {
 						public void run() {
 							CommonUiUtil.setMessage(WebQueryWizardPage.this, new Status(IStatus.ERROR,
 									TasksWebPlugin.ID_PLUGIN, NLS.bind("Failed to open ''{0}'': {1}", evaluatedUrl,
 											e.getMessage()), e));
 						}
 					});
 				}

 				return Status.OK_STATUS;
 			}
 		}.schedule();
 	}

 	@Override
 	public boolean isPageComplete() {
 		return super.isPageComplete();
 	}

 	void updatePreviewTable(List<TaskMapper> queryHits, MultiStatus queryStatus) {
 		previewTable.setInput(queryHits);

 		if (queryStatus.isOK()) {
 			setMessage(null, IMessageProvider.WARNING);
 		} else {
 			StringBuffer sb = new StringBuffer();
 			for (IStatus status : queryStatus.getChildren()) {
 				sb.append(status.getMessage()).append("\n"); //$NON-NLS-1$
 			}
 			setMessage(sb.toString(), IMessageProvider.WARNING);
 		}
 	}

 	private final class UpdatePreviewJob extends Job {
 		private volatile String url;

 		private volatile String regexp;

 		private volatile Map<String, String> params;

 		private volatile boolean active = false;

 		private UpdatePreviewJob(String name) {
 			super(name);
 		}

 		public boolean isActive() {
 			return active;
 		}

 		public void setParams(String url, String regexp, Map<String, String> params) {
 			this.url = url;
 			this.regexp = regexp;
 			this.params = params;
 		}

 		@Override
 		protected IStatus run(IProgressMonitor monitor) {
 			String currentRegexp = regexp;
 			String queryPattern = WebRepositoryConnector.evaluateParams(currentRegexp, params, getTaskRepository());
 			String evaluatedUrl = WebRepositoryConnector.evaluateParams(url, params, getTaskRepository());
 			String taskPrefix = WebRepositoryConnector.evaluateParams(getTaskRepository().getProperty(
 					WebRepositoryConnector.PROPERTY_TASK_URL), params, getTaskRepository());
 			active = true;
 			do {
 				final MultiStatus queryStatus = new MultiStatus(TasksWebPlugin.ID_PLUGIN, IStatus.OK,
 						Messages.WebQueryWizardPage_Query_result, null);
 				final List<TaskMapper> queryHits = new ArrayList<TaskMapper>();
 				try {
 					if (webPage == null) {
 						webPage = WebRepositoryConnector.fetchResource(evaluatedUrl, params, getTaskRepository());
 					}

 					TaskDataCollector collector = new TaskDataCollector() {
 						@Override
 						public void accept(TaskData taskData) {
 							queryHits.add(new TaskMapper(taskData));
 						}
 					};
 					IStatus status;
 					if (queryPattern != null && queryPattern.trim().length() > 0) {
 						status = WebRepositoryConnector.performQuery(webPage, queryPattern, taskPrefix, monitor,
 								collector, getTaskRepository());
 					} else {
 						status = WebRepositoryConnector.performRssQuery(webPage, monitor, collector,
 								getTaskRepository());
 					}

 					if (!status.isOK()) {
 						queryStatus.add(status);
 					} else if (queryHits.size() == 0) {
 						queryStatus.add(new Status(IStatus.ERROR, TasksWebPlugin.ID_PLUGIN, 0,
 								Messages.WebQueryWizardPage_No_matching_results_Check_query_regexp, null));
 					}

 				} catch (IOException ex) {
 					queryStatus.add(new Status(IStatus.ERROR, TasksWebPlugin.ID_PLUGIN, IStatus.ERROR, //
 							Messages.WebQueryWizardPage_Unable_to_fetch_resource_ + ex.getMessage(), null));
 				} catch (Exception ex) {
 					queryStatus.add(new Status(IStatus.ERROR, TasksWebPlugin.ID_PLUGIN, IStatus.ERROR, //
 							Messages.WebQueryWizardPage_Parsing_error_ + ex.getMessage(), null));
 				}

 				Display.getDefault().asyncExec(new Runnable() {
 					public void run() {
 						updatePreviewTable(queryHits, queryStatus);
 					}
 				});
 			} while (!currentRegexp.equals(currentRegexp) && !monitor.isCanceled());
 			active = false;
 			return Status.OK_STATUS;
 		}
 	}

 	@Override
 	public void applyTo(IRepositoryQuery query) {
 		query.setSummary(getQueryTitle());
 		query.setAttribute(WebRepositoryConnector.KEY_QUERY_TEMPLATE, queryUrlText.getText());
 		query.setAttribute(WebRepositoryConnector.KEY_QUERY_PATTERN, queryPatternText.getText());
 		query.setAttribute(WebRepositoryConnector.KEY_TASK_PREFIX, getTaskRepository().getProperty(
 				WebRepositoryConnector.PROPERTY_TASK_URL));
 		Map<String, String> params = parametersEditor.getParameters();
 		query.setUrl(WebRepositoryConnector.evaluateParams(queryUrlText.getText(), params, getTaskRepository()));
 		for (Map.Entry<String, String> entry : params.entrySet()) {
 			query.setAttribute(entry.getKey(), entry.getValue());
 		}
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2004, 2009 Eugene Kuleshov 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:
	* Eugene Kuleshov - initial API and implementation
	*******************************************************************************/

	package org.eclipse.mylyn.internal.web.tasks;

	import java.io.File;
	import java.io.FileWriter;
	import java.io.IOException;
	import java.util.ArrayList;
	import java.util.Collection;
	import java.util.LinkedHashMap;
	import java.util.List;
	import java.util.Map;
	import java.util.Set;

	import org.eclipse.core.runtime.IProgressMonitor;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.MultiStatus;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.core.runtime.jobs.Job;
	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.dialogs.IMessageProvider;
	import org.eclipse.jface.fieldassist.ControlDecoration;
	import org.eclipse.jface.viewers.ILabelProviderListener;
	import org.eclipse.jface.viewers.IStructuredContentProvider;
	import org.eclipse.jface.viewers.ITableLabelProvider;
	import org.eclipse.jface.viewers.TableViewer;
	import org.eclipse.jface.viewers.Viewer;
	import org.eclipse.mylyn.internal.provisional.commons.ui.CommonUiUtil;
	import org.eclipse.mylyn.internal.provisional.commons.ui.WorkbenchUtil;
	import org.eclipse.mylyn.tasks.core.IRepositoryQuery;
	import org.eclipse.mylyn.tasks.core.TaskRepository;
	import org.eclipse.mylyn.tasks.core.data.TaskData;
	import org.eclipse.mylyn.tasks.core.data.TaskDataCollector;
	import org.eclipse.mylyn.tasks.core.data.TaskMapper;
	import org.eclipse.mylyn.tasks.ui.wizards.AbstractRepositoryQueryPage;
	import org.eclipse.osgi.util.NLS;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.ModifyEvent;
	import org.eclipse.swt.events.ModifyListener;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.TableColumn;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.ui.browser.IWorkbenchBrowserSupport;
	import org.eclipse.ui.forms.events.ExpansionAdapter;
	import org.eclipse.ui.forms.events.ExpansionEvent;
	import org.eclipse.ui.forms.widgets.ExpandableComposite;
	import org.eclipse.ui.forms.widgets.FormToolkit;

	/**
	* Wizard page for configuring and preview web query
	*
	* @author Eugene Kuleshov
	*/
	public class WebQueryWizardPage extends AbstractRepositoryQueryPage {

	private Text queryUrlText;

	private Text queryPatternText;

	private TableViewer previewTable;

	private String webPage;

	private UpdatePreviewJob updatePreviewJob;

	private final FormToolkit toolkit = new FormToolkit(Display.getCurrent());

	private ParametersEditor parametersEditor;

	private Map<String, String> oldProperties;

	private final ArrayList<ControlDecoration> decorations = new ArrayList<ControlDecoration>();

	private Text title;

	public WebQueryWizardPage(TaskRepository repository, IRepositoryQuery query) {
	super(Messages.WebQueryWizardPage_New_web_query, repository, query);
	setTitle(Messages.WebQueryWizardPage_Create_web_query);
	setDescription(Messages.bind(Messages.WebQueryWizardPage_Specify_query_parameters_for_X,
	repository.getRepositoryUrl()));
	}

	@Override
	public void dispose() {
	for (ControlDecoration decoration : decorations) {
	decoration.dispose();
	}
	super.dispose();
	}

	private static String getDefaultQueryTitle(TaskRepository repository) {
	String label = repository.getRepositoryLabel();
	String title = label;
	for (int n = 1; hasQueryWithTitle(repository, title); n++) {
	title = label + " " + n;
	}
	return title;
	}

	@SuppressWarnings("restriction")
	private static boolean hasQueryWithTitle(TaskRepository repository, String title) {
	Set<org.eclipse.mylyn.internal.tasks.core.RepositoryQuery> queries = org.eclipse.mylyn.internal.tasks.ui.TasksUiPlugin.getTaskList()
	.getRepositoryQueries(repository.getRepositoryUrl());
	for (IRepositoryQuery query : queries) {
	if (query.getSummary().equals(title)) {
	return true;
	}
	}
	return false;
	}

	private void createTitleGroup(Composite parent) {
	Composite group = new Composite(parent, SWT.NONE);

	GridLayout layout = new GridLayout(2, false);
	group.setLayout(layout);

	GridData gd = new GridData(GridData.FILL_HORIZONTAL);
	gd.horizontalSpan = 1;
	group.setLayoutData(gd);

	Label label = new Label(group, SWT.NONE);
	label.setText(Messages.WebQueryWizardPage_Query_Title_);

	title = new Text(group, SWT.BORDER);
	title.setLayoutData(new GridData(GridData.FILL_HORIZONTAL \| GridData.GRAB_HORIZONTAL));
	title.setText(getQuery() == null ? getDefaultQueryTitle(getTaskRepository()) : getQuery().getSummary());
	title.addModifyListener(new ModifyListener() {
	public void modifyText(ModifyEvent e) {
	setPageComplete(isPageComplete());
	}
	});
	title.setFocus();
	}

	@Override
	public String getQueryTitle() {
	return (title != null) ? title.getText() : null;
	}

	public void createControl(Composite parent) {
	final Composite composite = new Composite(parent, SWT.NONE);
	GridLayout gridLayout = new GridLayout();
	gridLayout.marginHeight = 0;
	gridLayout.marginWidth = 0;
	gridLayout.verticalSpacing = 0;
	gridLayout.numColumns = 1;
	composite.setLayout(gridLayout);

	if (!inSearchContainer()) {
	createTitleGroup(composite);
	}

	parametersEditor = new ParametersEditor(composite, SWT.NONE);
	GridData gridData1 = new GridData(SWT.FILL, SWT.FILL, true, true);
	gridData1.minimumHeight = 90;
	parametersEditor.setLayoutData(gridData1);

	ExpandableComposite expComposite = toolkit.createExpandableComposite(composite, ExpandableComposite.COMPACT
	\| ExpandableComposite.TWISTIE);
	expComposite.setFont(parent.getFont());
	GridData gridData_1 = new GridData(SWT.FILL, SWT.FILL, true, false);
	gridData_1.heightHint = 150;
	gridData_1.minimumHeight = 150;
	expComposite.setLayoutData(gridData_1);
	expComposite.setBackground(parent.getBackground());
	expComposite.setText(Messages.WebQueryWizardPage_Advanced_Configuration);
	expComposite.addExpansionListener(new ExpansionAdapter() {
	@Override
	public void expansionStateChanged(ExpansionEvent e) {
	getControl().getShell().pack();
	}
	});
	toolkit.paintBordersFor(expComposite);

	Composite composite1 = toolkit.createComposite(expComposite, SWT.BORDER);
	composite1.setLayout(new GridLayout(3, false));
	expComposite.setClient(composite1);

	toolkit.createLabel(composite1, Messages.WebQueryWizardPage_Query_URL_, SWT.NONE);

	queryUrlText = new Text(composite1, SWT.BORDER);
	final GridData gridData_2 = new GridData(SWT.FILL, SWT.CENTER, true, false);
	gridData_2.widthHint = 200;
	queryUrlText.setLayoutData(gridData_2);
	queryUrlText.addModifyListener(new ModifyListener() {
	public void modifyText(final ModifyEvent e) {
	webPage = null;
	}
	});
	decorations.add(WebContentProposalProvider.createDecoration(queryUrlText, parametersEditor, false));

	Button button = new Button(composite1, SWT.NONE);
	button.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false));
	button.setText(Messages.WebQueryWizardPage_Open);
	button.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	openBrowser();
	}
	});

	Label queryPatternLabel = toolkit.createLabel(composite1, Messages.WebQueryWizardPage_Query_Pattern_, SWT.NONE);
	queryPatternLabel.setLayoutData(new GridData(SWT.LEFT, SWT.TOP, false, false));

	queryPatternText = new Text(composite1, SWT.V_SCROLL \| SWT.MULTI \| SWT.BORDER \| SWT.WRAP);
	GridData gridData = new GridData(SWT.FILL, SWT.TOP, true, false);
	gridData.widthHint = 200;
	gridData.heightHint = 60;
	queryPatternText.setLayoutData(gridData);
	decorations.add(WebContentProposalProvider.createDecoration(queryPatternText, parametersEditor, true));

	Button preview = new Button(composite1, SWT.NONE);
	preview.setLayoutData(new GridData(SWT.FILL, SWT.TOP, false, false));
	preview.setText(Messages.WebQueryWizardPage_Preview);
	preview.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(final SelectionEvent e) {
	webPage = null;
	updatePreview();
	}
	});

	previewTable = new TableViewer(composite1, SWT.BORDER);
	// previewTable = new Table(composite1, SWT.BORDER);
	GridData gridData2 = new GridData(SWT.FILL, SWT.FILL, false, true, 3, 1);
	gridData2.heightHint = 60;

	Table table = previewTable.getTable();
	table.setLayoutData(gridData2);
	table.setLinesVisible(true);
	table.setHeaderVisible(true);

	TableColumn colId = new TableColumn(table, SWT.NONE);
	colId.setWidth(100);
	colId.setText(Messages.WebQueryWizardPage_Id);

	TableColumn colDescription = new TableColumn(table, SWT.NONE);
	colDescription.setWidth(200);
	colDescription.setText(Messages.WebQueryWizardPage_Description);

	TableColumn colStatus = new TableColumn(table, SWT.NONE);
	colStatus.setText(Messages.WebQueryWizardPage_Status);
	colStatus.setWidth(80);

	TableColumn colType = new TableColumn(table, SWT.NONE);
	colType.setText(Messages.WebQueryWizardPage_Type);
	colType.setWidth(80);

	TableColumn colOwner = new TableColumn(table, SWT.NONE);
	colOwner.setText(Messages.WebQueryWizardPage_Owner);
	colOwner.setWidth(120);

	previewTable.setColumnProperties(new String[] { "Id", "Description", "Status", "Type", "Owner" }); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$ //$NON-NLS-5$
	previewTable.setContentProvider(new IStructuredContentProvider() {

	public void dispose() {
	}

	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
	}

	public Object[] getElements(Object inputElement) {
	if (inputElement instanceof Collection<?>) {
	return ((Collection<?>) inputElement).toArray();
	}
	return new Object[0];
	}
	});

	previewTable.setLabelProvider(new ITableLabelProvider() {

	public String getColumnText(Object element, int columnIndex) {
	TaskMapper task = (TaskMapper) element;
	switch (columnIndex) {
	case 0:
	return task.getTaskData().getTaskId();
	case 1:
	return task.getSummary();
	case 2:
	return task.getCompletionDate() != null ? Messages.WebQueryWizardPage_complete
	: Messages.WebQueryWizardPage_incomplete;
	case 3:
	return task.getTaskKind();
	case 4:
	return task.getOwner();
	}
	return null;
	}

	public Image getColumnImage(Object element, int columnIndex) {
	return null;
	}

	public void addListener(ILabelProviderListener listener) {
	}

	public void dispose() {
	}

	public boolean isLabelProperty(Object element, String property) {
	return false;
	}

	public void removeListener(ILabelProviderListener listener) {
	}
	});

	setControl(composite);

	LinkedHashMap<String, String> vars = new LinkedHashMap<String, String>();
	Map<String, String> params = new LinkedHashMap<String, String>();
	if (getTaskRepository() != null) {
	queryUrlText.setText(addVars(vars, getTaskRepository().getProperty(
	WebRepositoryConnector.PROPERTY_QUERY_URL)));
	queryPatternText.setText(addVars(vars, getTaskRepository().getProperty(
	WebRepositoryConnector.PROPERTY_QUERY_REGEXP)));

	oldProperties = getTaskRepository().getProperties();
	params.putAll(oldProperties);
	}
	IRepositoryQuery query = getQuery();
	if (query != null) {
	setTitle(query.getSummary());
	queryUrlText.setText(addVars(vars, query.getAttribute(WebRepositoryConnector.KEY_QUERY_TEMPLATE)));
	queryPatternText.setText(addVars(vars, query.getAttribute(WebRepositoryConnector.KEY_QUERY_PATTERN)));
	params.putAll(WebRepositoryConnector.getQueryParams(query));
	}
	parametersEditor.addParams(params, vars);

	Dialog.applyDialogFont(composite);
	}

	private static String addVars(LinkedHashMap<String, String> vars, String property) {
	if (property == null) {
	return ""; //$NON-NLS-1$
	}
	for (String var : WebRepositoryConnector.getTemplateVariables(property)) {
	vars.put(var, ""); //$NON-NLS-1$
	}
	return property;
	}

	synchronized void updatePreview() {
	if (updatePreviewJob == null) {
	updatePreviewJob = new UpdatePreviewJob(Messages.WebQueryWizardPage_Updating_preview);
	updatePreviewJob.setPriority(Job.DECORATE);
	}
	updatePreviewJob.setParams(queryUrlText.getText(), queryPatternText.getText(), parametersEditor.getParameters());
	if (!updatePreviewJob.isActive()) {
	updatePreviewJob.schedule();
	}
	}

	protected void openBrowser() {
	final String url = queryUrlText.getText();
	final Map<String, String> params = parametersEditor.getParameters();

	new Job("Opening Browser") {
	@Override
	protected IStatus run(IProgressMonitor monitor) {
	final String evaluatedUrl = WebRepositoryConnector.evaluateParams(url, params, getTaskRepository());
	try {
	String webPage = WebRepositoryConnector.fetchResource(evaluatedUrl, params, getTaskRepository());
	File webPageFile = File.createTempFile("mylyn-web-connector", ".html");
	webPageFile.deleteOnExit();

	FileWriter w = new FileWriter(webPageFile);
	try {
	w.write(webPage);
	} finally {
	w.close();
	}

	final String location = webPageFile.toURI().toURL().toString();
	Display.getDefault().asyncExec(new Runnable() {
	public void run() {
	WorkbenchUtil.openUrl(location, IWorkbenchBrowserSupport.AS_EXTERNAL);
	}
	});
	} catch (final Exception e) {
	Display.getDefault().asyncExec(new Runnable() {
	public void run() {
	CommonUiUtil.setMessage(WebQueryWizardPage.this, new Status(IStatus.ERROR,
	TasksWebPlugin.ID_PLUGIN, NLS.bind("Failed to open ''{0}'': {1}", evaluatedUrl,
	e.getMessage()), e));
	}
	});
	}

	return Status.OK_STATUS;
	}
	}.schedule();
	}

	@Override
	public boolean isPageComplete() {
	return super.isPageComplete();
	}

	void updatePreviewTable(List<TaskMapper> queryHits, MultiStatus queryStatus) {
	previewTable.setInput(queryHits);

	if (queryStatus.isOK()) {
	setMessage(null, IMessageProvider.WARNING);
	} else {
	StringBuffer sb = new StringBuffer();
	for (IStatus status : queryStatus.getChildren()) {
	sb.append(status.getMessage()).append("\n"); //$NON-NLS-1$
	}
	setMessage(sb.toString(), IMessageProvider.WARNING);
	}
	}

	private final class UpdatePreviewJob extends Job {
	private volatile String url;

	private volatile String regexp;

	private volatile Map<String, String> params;

	private volatile boolean active = false;

	private UpdatePreviewJob(String name) {
	super(name);
	}

	public boolean isActive() {
	return active;
	}

	public void setParams(String url, String regexp, Map<String, String> params) {
	this.url = url;
	this.regexp = regexp;
	this.params = params;
	}

	@Override
	protected IStatus run(IProgressMonitor monitor) {
	String currentRegexp = regexp;
	String queryPattern = WebRepositoryConnector.evaluateParams(currentRegexp, params, getTaskRepository());
	String evaluatedUrl = WebRepositoryConnector.evaluateParams(url, params, getTaskRepository());
	String taskPrefix = WebRepositoryConnector.evaluateParams(getTaskRepository().getProperty(
	WebRepositoryConnector.PROPERTY_TASK_URL), params, getTaskRepository());
	active = true;
	do {
	final MultiStatus queryStatus = new MultiStatus(TasksWebPlugin.ID_PLUGIN, IStatus.OK,
	Messages.WebQueryWizardPage_Query_result, null);
	final List<TaskMapper> queryHits = new ArrayList<TaskMapper>();
	try {
	if (webPage == null) {
	webPage = WebRepositoryConnector.fetchResource(evaluatedUrl, params, getTaskRepository());
	}

	TaskDataCollector collector = new TaskDataCollector() {
	@Override
	public void accept(TaskData taskData) {
	queryHits.add(new TaskMapper(taskData));
	}
	};
	IStatus status;
	if (queryPattern != null && queryPattern.trim().length() > 0) {
	status = WebRepositoryConnector.performQuery(webPage, queryPattern, taskPrefix, monitor,
	collector, getTaskRepository());
	} else {
	status = WebRepositoryConnector.performRssQuery(webPage, monitor, collector,
	getTaskRepository());
	}

	if (!status.isOK()) {
	queryStatus.add(status);
	} else if (queryHits.size() == 0) {
	queryStatus.add(new Status(IStatus.ERROR, TasksWebPlugin.ID_PLUGIN, 0,
	Messages.WebQueryWizardPage_No_matching_results_Check_query_regexp, null));
	}

	} catch (IOException ex) {
	queryStatus.add(new Status(IStatus.ERROR, TasksWebPlugin.ID_PLUGIN, IStatus.ERROR, //
	Messages.WebQueryWizardPage_Unable_to_fetch_resource_ + ex.getMessage(), null));
	} catch (Exception ex) {
	queryStatus.add(new Status(IStatus.ERROR, TasksWebPlugin.ID_PLUGIN, IStatus.ERROR, //
	Messages.WebQueryWizardPage_Parsing_error_ + ex.getMessage(), null));
	}

	Display.getDefault().asyncExec(new Runnable() {
	public void run() {
	updatePreviewTable(queryHits, queryStatus);
	}
	});
	} while (!currentRegexp.equals(currentRegexp) && !monitor.isCanceled());
	active = false;
	return Status.OK_STATUS;
	}
	}

	@Override
	public void applyTo(IRepositoryQuery query) {
	query.setSummary(getQueryTitle());
	query.setAttribute(WebRepositoryConnector.KEY_QUERY_TEMPLATE, queryUrlText.getText());
	query.setAttribute(WebRepositoryConnector.KEY_QUERY_PATTERN, queryPatternText.getText());
	query.setAttribute(WebRepositoryConnector.KEY_TASK_PREFIX, getTaskRepository().getProperty(
	WebRepositoryConnector.PROPERTY_TASK_URL));
	Map<String, String> params = parametersEditor.getParameters();
	query.setUrl(WebRepositoryConnector.evaluateParams(queryUrlText.getText(), params, getTaskRepository()));
	for (Map.Entry<String, String> entry : params.entrySet()) {
	query.setAttribute(entry.getKey(), entry.getValue());
	}
	}

	}