org.eclipse.mylyn.trac.ui/src/org/eclipse/mylyn/internal/trac/ui/wizard/TracQueryPage.java - mylyn/org.eclipse.mylyn.tasks - Git at Google

 /*******************************************************************************
  * Copyright (c) 2006, 2008 Steffen Pingel 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
  *******************************************************************************/

 package org.eclipse.mylyn.internal.trac.ui.wizard;

 import java.lang.reflect.InvocationTargetException;
 import java.util.HashMap;
 import java.util.Map;

 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.dialogs.MessageDialog;
 import org.eclipse.jface.operation.IRunnableWithProgress;
 import org.eclipse.mylyn.commons.core.StatusHandler;
 import org.eclipse.mylyn.internal.trac.core.TracCorePlugin;
 import org.eclipse.mylyn.internal.trac.core.TracRepositoryConnector;
 import org.eclipse.mylyn.internal.trac.core.client.ITracClient;
 import org.eclipse.mylyn.internal.trac.core.client.TracException;
 import org.eclipse.mylyn.internal.trac.core.model.TracSearch;
 import org.eclipse.mylyn.internal.trac.core.model.TracSearchFilter;
 import org.eclipse.mylyn.internal.trac.core.model.TracSearchFilter.CompareOperator;
 import org.eclipse.mylyn.internal.trac.core.util.TracUtil;
 import org.eclipse.mylyn.internal.trac.ui.TracUiPlugin;
 import org.eclipse.mylyn.tasks.core.IRepositoryQuery;
 import org.eclipse.mylyn.tasks.core.TaskRepository;
 import org.eclipse.mylyn.tasks.ui.TasksUi;
 import org.eclipse.mylyn.tasks.ui.wizards.AbstractRepositoryQueryPage;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.KeyEvent;
 import org.eclipse.swt.events.KeyListener;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Combo;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Group;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.List;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.progress.IProgressService;

 /**
  * Trac search page. Provides a form similar to the one the Bugzilla connector uses.
  *
  * @author Steffen Pingel
  */
 public class TracQueryPage extends AbstractRepositoryQueryPage {

 	private Text titleText;

 	private static final int PRODUCT_HEIGHT = 60;

 	private static final int STATUS_HEIGHT = 40;

 	protected final static String PAGE_NAME = "TracSearchPage"; //$NON-NLS-1$

 	private static final String SEARCH_URL_ID = PAGE_NAME + ".SEARCHURL"; //$NON-NLS-1$

 	protected Combo summaryText = null;

 	protected Combo repositoryCombo = null;

 	private TextSearchField summaryField;

 	private TextSearchField descriptionField;

 	private ListSearchField componentField;

 	private ListSearchField versionField;

 	private ListSearchField milestoneField;

 	private ListSearchField priorityField;

 	private ListSearchField typeField;

 	private ListSearchField resolutionField;

 	private ListSearchField statusField;

 	private Button updateButton;

 	private TextSearchField keywordsField;

 	private final Map<String, SearchField> searchFieldByName = new HashMap<String, SearchField>();

 	private boolean firstTime = true;

 	// private UserSearchField ownerField;
 	//
 	// private UserSearchField reporterField;
 	//
 	// private UserSearchField ccField;

 	public TracQueryPage(TaskRepository repository, IRepositoryQuery query) {
 		super(Messages.TracQueryPage_Enter_query_parameters, repository, query);
 		setTitle(Messages.TracQueryPage_Enter_query_parameters);
 		setDescription(Messages.TracQueryPage_If_attributes_are_blank_or_stale_press_the_Update_button);
 	}

 	public TracQueryPage(TaskRepository repository) {
 		this(repository, null);
 	}

 	public void createControl(Composite parent) {
 		Composite control = new Composite(parent, SWT.NONE);
 		GridData gd = new GridData(GridData.FILL_BOTH);
 		control.setLayoutData(gd);
 		GridLayout layout = new GridLayout(4, false);
 		if (inSearchContainer()) {
 			layout.marginWidth = 0;
 			layout.marginHeight = 0;
 		}
 		control.setLayout(layout);

 		createTitleGroup(control);

 		summaryField = new TextSearchField("summary"); //$NON-NLS-1$
 		summaryField.createControls(control, Messages.TracQueryPage_Summary);

 		descriptionField = new TextSearchField("description"); //$NON-NLS-1$
 		descriptionField.createControls(control, Messages.TracQueryPage_Description);

 		keywordsField = new TextSearchField("keywords"); //$NON-NLS-1$
 		keywordsField.createControls(control, Messages.TracQueryPage_Keywords);

 		createOptionsGroup(control);

 		createUserGroup(control);

 		if (getQuery() != null) {
 			titleText.setText(getQuery().getSummary());
 			TracSearch search = TracUtil.toTracSearch(getQuery());
 			if (search != null) {
 				restoreWidgetValues(search);
 			}
 		}

 		Dialog.applyDialogFont(control);
 		setControl(control);
 	}

 	@Override
 	public boolean canFlipToNextPage() {
 		return false;
 	}

 	private void restoreWidgetValues(TracSearch search) {
 		java.util.List<TracSearchFilter> filters = search.getFilters();
 		for (TracSearchFilter filter : filters) {
 			SearchField field = searchFieldByName.get(filter.getFieldName());
 			if (field != null) {
 				field.setFilter(filter);
 			} else {
 				StatusHandler.log(new Status(IStatus.WARNING, TracUiPlugin.ID_PLUGIN,
 						"Ignoring invalid search filter: " + filter)); //$NON-NLS-1$
 			}
 		}
 	}

 	private void createTitleGroup(Composite control) {
 		if (inSearchContainer()) {
 			return;
 		}

 		Label titleLabel = new Label(control, SWT.NONE);
 		titleLabel.setText(Messages.TracQueryPage_Query_Title);

 		titleText = new Text(control, SWT.BORDER);
 		GridData gd = new GridData(GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL);
 		gd.horizontalSpan = 3;
 		titleText.setLayoutData(gd);
 		titleText.addKeyListener(new KeyListener() {
 			public void keyPressed(KeyEvent e) {
 				// ignore
 			}

 			public void keyReleased(KeyEvent e) {
 				getContainer().updateButtons();
 			}
 		});
 	}

 	protected Control createOptionsGroup(Composite control) {
 		Group group = new Group(control, SWT.NONE);
 		// group.setText("Ticket Attributes");
 		GridLayout layout = new GridLayout();
 		layout.numColumns = 1;
 		group.setLayout(layout);
 		GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true);
 		gd.horizontalSpan = 4;
 		group.setLayoutData(gd);

 		createProductAttributes(group);
 		createTicketAttributes(group);
 		createUpdateButton(group);

 		return group;
 	}

 	protected void createUserGroup(Composite control) {
 		UserSearchField userField = new UserSearchField();
 		userField.createControls(control);
 	}

 	/**
 	 * Creates the area for selection on product attributes component/version/milestone.
 	 */
 	protected Control createProductAttributes(Composite control) {
 		Composite group = new Composite(control, SWT.NONE);
 		GridLayout layout = new GridLayout();
 		layout.numColumns = 3;
 		group.setLayout(layout);
 		GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true);
 		gd.horizontalSpan = 1;
 		group.setLayoutData(gd);

 		Label label = new Label(group, SWT.LEFT);
 		label.setText(Messages.TracQueryPage_Component);

 		label = new Label(group, SWT.LEFT);
 		label.setText(Messages.TracQueryPage_Version);

 		label = new Label(group, SWT.LEFT);
 		label.setText(Messages.TracQueryPage_Milestone);

 		componentField = new ListSearchField("component"); //$NON-NLS-1$
 		componentField.createControls(group, PRODUCT_HEIGHT);

 		versionField = new ListSearchField("version"); //$NON-NLS-1$
 		versionField.createControls(group, PRODUCT_HEIGHT);

 		milestoneField = new ListSearchField("milestone"); //$NON-NLS-1$
 		milestoneField.createControls(group, PRODUCT_HEIGHT);

 		return group;
 	}

 	/**
 	 * Creates the area for selection of ticket attributes status/resolution/priority.
 	 */
 	protected Control createTicketAttributes(Composite control) {
 		Composite group = new Composite(control, SWT.NONE);
 		GridLayout layout = new GridLayout();
 		layout.numColumns = 4;
 		group.setLayout(layout);
 		GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true);
 		gd.horizontalSpan = 1;
 		group.setLayoutData(gd);

 		Label label = new Label(group, SWT.LEFT);
 		label.setText(Messages.TracQueryPage_Status);

 		label = new Label(group, SWT.LEFT);
 		label.setText(Messages.TracQueryPage_Resolution);

 		label = new Label(group, SWT.LEFT);
 		label.setText(Messages.TracQueryPage_Type);

 		label = new Label(group, SWT.LEFT);
 		label.setText(Messages.TracQueryPage_Priority);

 		statusField = new ListSearchField("status"); //$NON-NLS-1$
 		statusField.createControls(group, STATUS_HEIGHT);

 		resolutionField = new ListSearchField("resolution"); //$NON-NLS-1$
 		resolutionField.createControls(group, STATUS_HEIGHT);

 		typeField = new ListSearchField("type"); //$NON-NLS-1$
 		typeField.createControls(group, STATUS_HEIGHT);

 		priorityField = new ListSearchField("priority"); //$NON-NLS-1$
 		priorityField.createControls(group, STATUS_HEIGHT);

 		return group;
 	}

 	protected Control createUpdateButton(final Composite control) {
 		Composite group = new Composite(control, SWT.NONE);
 		GridLayout layout = new GridLayout(2, false);
 		group.setLayout(layout);
 		group.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

 		updateButton = new Button(group, SWT.PUSH);
 		updateButton.setText(Messages.TracQueryPage_Update_Attributes_from_Repository);
 		updateButton.setLayoutData(new GridData());
 		updateButton.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				if (getTaskRepository() != null) {
 					updateAttributesFromRepository(true);
 				} else {
 					MessageDialog.openInformation(Display.getCurrent().getActiveShell(),
 							Messages.TracQueryPage_Update_Attributes_Failed,
 							Messages.TracQueryPage_No_repository_available);
 				}
 			}
 		});

 		return group;
 	}

 	@Override
 	public void setVisible(boolean visible) {
 		super.setVisible(visible);

 		if (getSearchContainer() != null) {
 			getSearchContainer().setPerformActionEnabled(true);
 		}

 		if (visible && firstTime) {
 			firstTime = false;
 			if (!hasAttributes()) {
 				// delay the execution so the dialog's progress bar is visible
 				// when the attributes are updated
 				Display.getDefault().asyncExec(new Runnable() {
 					public void run() {
 						if (getControl() != null && !getControl().isDisposed()) {
 							initializePage();
 						}
 					}

 				});
 			} else {
 				// no remote connection is needed to get attributes therefore do
 				// not use delayed execution to avoid flickering
 				initializePage();
 			}
 		}
 	}

 	private void initializePage() {
 		updateAttributesFromRepository(false);
 		boolean restored = (getQuery() != null);
 		if (inSearchContainer()) {
 			restored |= restoreWidgetValues();
 		}
 		if (!restored) {
 			// initialize with default values
 		}
 	}

 	private boolean hasAttributes() {
 		TracRepositoryConnector connector = (TracRepositoryConnector) TasksUi.getRepositoryManager()
 				.getRepositoryConnector(TracCorePlugin.CONNECTOR_KIND);
 		ITracClient client = connector.getClientManager().getTracClient(getTaskRepository());
 		return client.hasAttributes();
 	}

 	private void updateAttributesFromRepository(final boolean force) {
 		TracRepositoryConnector connector = (TracRepositoryConnector) TasksUi.getRepositoryManager()
 				.getRepositoryConnector(TracCorePlugin.CONNECTOR_KIND);
 		final ITracClient client = connector.getClientManager().getTracClient(getTaskRepository());

 		if (!client.hasAttributes() || force) {
 			try {
 				IRunnableWithProgress runnable = new IRunnableWithProgress() {
 					public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
 						try {
 							client.updateAttributes(monitor, force);
 						} catch (TracException e) {
 							throw new InvocationTargetException(e);
 						}
 					}
 				};

 				if (getContainer() != null) {
 					getContainer().run(true, true, runnable);
 				} else if (getSearchContainer() != null) {
 					getSearchContainer().getRunnableContext().run(true, true, runnable);
 				} else {
 					IProgressService service = PlatformUI.getWorkbench().getProgressService();
 					service.busyCursorWhile(runnable);
 				}
 			} catch (InvocationTargetException e) {
 				setErrorMessage(TracCorePlugin.toStatus(e.getCause(), getTaskRepository()).getMessage());
 				return;
 			} catch (InterruptedException e) {
 				return;
 			}
 		}

 		statusField.setValues(client.getTicketStatus());
 		resolutionField.setValues(client.getTicketResolutions());
 		typeField.setValues(client.getTicketTypes());
 		priorityField.setValues(client.getPriorities());

 		componentField.setValues(client.getComponents());
 		versionField.setValues(client.getVersions());
 		milestoneField.setValues(client.getMilestones());
 	}

 	@Override
 	public boolean isPageComplete() {
 		if (titleText != null && titleText.getText().length() > 0) {
 			return true;
 		}
 		return false;
 	}

 	public String getQueryUrl(String repsitoryUrl) {
 		TracSearch search = getTracSearch();

 		StringBuilder sb = new StringBuilder();
 		sb.append(repsitoryUrl);
 		sb.append(ITracClient.QUERY_URL);
 		sb.append(search.toUrl());
 		return sb.toString();
 	}

 	private TracSearch getTracSearch() {
 		TracSearch search = new TracSearch();
 		for (SearchField field : searchFieldByName.values()) {
 			TracSearchFilter filter = field.getFilter();
 			if (filter != null) {
 				search.addFilter(filter);
 			}
 		}
 		return search;
 	}

 	// public boolean performAction() {
 	//
 	// Proxy proxySettings = TasksUiPlugin.getDefault().getProxySettings();
 	// SearchHitCollector collector = new
 	// SearchHitCollector(TasksUiPlugin.getTaskList(),
 	// repository, getQuery(), proxySettings);
 	// NewSearchUI.runQueryInBackground(collector);
 	//
 	// return true;
 	// }

 	@Override
 	public boolean performSearch() {
 		if (inSearchContainer()) {
 			saveState();
 		}

 		return super.performSearch();
 	}

 	@Override
 	public IDialogSettings getDialogSettings() {
 		IDialogSettings settings = TracUiPlugin.getDefault().getDialogSettings();
 		IDialogSettings dialogSettings = settings.getSection(PAGE_NAME);
 		if (dialogSettings == null) {
 			dialogSettings = settings.addNewSection(PAGE_NAME);
 		}
 		return dialogSettings;
 	}

 	private boolean restoreWidgetValues() {
 		IDialogSettings settings = getDialogSettings();
 		String repoId = "." + getTaskRepository().getRepositoryUrl(); //$NON-NLS-1$

 		String searchUrl = settings.get(SEARCH_URL_ID + repoId);
 		if (searchUrl == null) {
 			return false;
 		}

 		restoreWidgetValues(new TracSearch(searchUrl));
 		return true;
 	}

 	@Override
 	public void saveState() {
 		String repoId = "." + getTaskRepository().getRepositoryUrl(); //$NON-NLS-1$
 		IDialogSettings settings = getDialogSettings();
 		settings.put(SEARCH_URL_ID + repoId, getTracSearch().toUrl());
 	}

 	private abstract class SearchField {

 		protected String fieldName;

 		public SearchField(String fieldName) {
 			this.fieldName = fieldName;

 			if (fieldName != null) {
 				assert !searchFieldByName.containsKey(fieldName);
 				searchFieldByName.put(fieldName, this);
 			}
 		}

 		public String getFieldName() {
 			return fieldName;
 		}

 		public abstract TracSearchFilter getFilter();

 		public abstract void setFilter(TracSearchFilter filter);

 	}

 	private class TextSearchField extends SearchField {

 		private Combo conditionCombo;

 		protected Text searchText;

 		private Label label;

 		private final CompareOperator[] compareOperators = { CompareOperator.CONTAINS, CompareOperator.CONTAINS_NOT,
 				CompareOperator.BEGINS_WITH, CompareOperator.ENDS_WITH, CompareOperator.IS, CompareOperator.IS_NOT, };

 		public TextSearchField(String fieldName) {
 			super(fieldName);
 		}

 		public void createControls(Composite parent, String labelText) {
 			if (labelText != null) {
 				label = new Label(parent, SWT.LEFT);
 				label.setText(labelText);
 			}

 			conditionCombo = new Combo(parent, SWT.SINGLE | SWT.BORDER | SWT.READ_ONLY);
 			for (CompareOperator op : compareOperators) {
 				conditionCombo.add(op.toString());
 			}
 			conditionCombo.setText(compareOperators[0].toString());

 			searchText = new Text(parent, SWT.BORDER);
 			GridData gd = new GridData(SWT.FILL, SWT.CENTER, true, false);
 			// the user search field has additional controls and no fieldName
 			if (fieldName != null) {
 				gd.horizontalSpan = 2;
 			}
 			searchText.setLayoutData(gd);
 		}

 		public CompareOperator getCondition() {
 			return compareOperators[conditionCombo.getSelectionIndex()];
 		}

 		public String getSearchText() {
 			return searchText.getText();
 		}

 		public boolean setCondition(CompareOperator operator) {
 			if (conditionCombo != null) {
 				int i = conditionCombo.indexOf(operator.toString());
 				if (i != -1) {
 					conditionCombo.select(i);
 					return true;
 				}
 			}
 			return false;
 		}

 		public void setSearchText(String text) {
 			searchText.setText(text);
 		}

 		@Override
 		public TracSearchFilter getFilter() {
 			String text = getSearchText();
 			if (text.length() == 0) {
 				return null;
 			}

 			TracSearchFilter newFilter = new TracSearchFilter(getFieldName());
 			newFilter.setOperator(getCondition());
 			newFilter.addValue(getSearchText());
 			return newFilter;
 		}

 		@Override
 		public void setFilter(TracSearchFilter filter) {
 			setCondition(filter.getOperator());
 			java.util.List<String> values = filter.getValues();
 			setSearchText(values.get(0));
 		}

 		public void setFieldName(String fieldName) {
 			this.fieldName = fieldName;
 		}

 	}

 	private class ListSearchField extends SearchField {

 		private List list;

 		public ListSearchField(String fieldName) {
 			super(fieldName);
 		}

 		public void setValues(Object[] items) {
 			// preserve selected values
 			TracSearchFilter filter = getFilter();

 			list.removeAll();
 			if (items != null) {
 				list.setEnabled(true);
 				for (Object item : items) {
 					list.add(item.toString());
 				}

 				// restore selected values
 				if (filter != null) {
 					setFilter(filter);
 				}
 			} else {
 				list.setEnabled(false);
 			}
 		}

 		public void createControls(Composite parent, int height) {
 			list = new List(parent, SWT.MULTI | SWT.V_SCROLL | SWT.BORDER);
 			GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true);
 			gd.heightHint = height;
 			list.setLayoutData(gd);
 		}

 		@Override
 		public TracSearchFilter getFilter() {
 			int[] indicies = list.getSelectionIndices();
 			if (indicies.length == 0) {
 				return null;
 			}

 			TracSearchFilter newFilter = new TracSearchFilter(getFieldName());
 			newFilter.setOperator(CompareOperator.IS);
 			for (int i : indicies) {
 				newFilter.addValue(list.getItem(i));
 			}
 			return newFilter;
 		}

 		@Override
 		public void setFilter(TracSearchFilter filter) {
 			list.deselectAll();
 			java.util.List<String> values = filter.getValues();
 			for (String item : values) {
 				int i = list.indexOf(item);
 				if (i != -1) {
 					list.select(i);
 				} else {
 					list.add(item, 0);
 					list.select(0);
 				}
 			}
 		}

 		public void selectItems(String[] items) {
 			list.deselectAll();
 			for (String item : items) {
 				int i = list.indexOf(item);
 				if (i != -1) {
 					list.select(i);
 				}
 			}
 		}

 	}

 	private class UserSearchField extends SearchField {

 		private final TextSearchField textField;

 		private Combo userCombo;

 		public UserSearchField() {
 			super(null);

 			textField = new TextSearchField(null);

 			new UserSelectionSearchField("owner", 0); //$NON-NLS-1$

 			new UserSelectionSearchField("reporter", 1); //$NON-NLS-1$

 			new UserSelectionSearchField("cc", 2); //$NON-NLS-1$
 		}

 		public void createControls(Composite parent) {
 			userCombo = new Combo(parent, SWT.SINGLE | SWT.BORDER | SWT.READ_ONLY);
 			userCombo.add(Messages.TracQueryPage_Owner);
 			userCombo.add(Messages.TracQueryPage_Reporter);
 			userCombo.add(Messages.TracQueryPage_CC);
 			userCombo.select(0);

 			textField.createControls(parent, null);
 		}

 		@Override
 		public TracSearchFilter getFilter() {
 			return null;
 		}

 		@Override
 		public void setFilter(TracSearchFilter filter) {
 		}

 		private void setSelection(int index) {
 			userCombo.select(index);
 		}

 		private int getSelection() {
 			return userCombo.getSelectionIndex();
 		}

 		class UserSelectionSearchField extends SearchField {

 			private final int index;

 			public UserSelectionSearchField(String fieldName, int index) {
 				super(fieldName);

 				this.index = index;
 			}

 			@Override
 			public TracSearchFilter getFilter() {
 				if (index == getSelection()) {
 					textField.setFieldName(fieldName);
 					return textField.getFilter();
 				}
 				return null;
 			}

 			@Override
 			public void setFilter(TracSearchFilter filter) {
 				textField.setFieldName(fieldName);
 				textField.setFilter(filter);
 				setSelection(index);
 			}

 		}

 	}

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

 	@Override
 	public void applyTo(IRepositoryQuery query) {
 		query.setUrl(getQueryUrl(getTaskRepository().getRepositoryUrl()));
 		query.setSummary(getQueryTitle());
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2006, 2008 Steffen Pingel 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
	*******************************************************************************/

	package org.eclipse.mylyn.internal.trac.ui.wizard;

	import java.lang.reflect.InvocationTargetException;
	import java.util.HashMap;
	import java.util.Map;

	import org.eclipse.core.runtime.IProgressMonitor;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.dialogs.IDialogSettings;
	import org.eclipse.jface.dialogs.MessageDialog;
	import org.eclipse.jface.operation.IRunnableWithProgress;
	import org.eclipse.mylyn.commons.core.StatusHandler;
	import org.eclipse.mylyn.internal.trac.core.TracCorePlugin;
	import org.eclipse.mylyn.internal.trac.core.TracRepositoryConnector;
	import org.eclipse.mylyn.internal.trac.core.client.ITracClient;
	import org.eclipse.mylyn.internal.trac.core.client.TracException;
	import org.eclipse.mylyn.internal.trac.core.model.TracSearch;
	import org.eclipse.mylyn.internal.trac.core.model.TracSearchFilter;
	import org.eclipse.mylyn.internal.trac.core.model.TracSearchFilter.CompareOperator;
	import org.eclipse.mylyn.internal.trac.core.util.TracUtil;
	import org.eclipse.mylyn.internal.trac.ui.TracUiPlugin;
	import org.eclipse.mylyn.tasks.core.IRepositoryQuery;
	import org.eclipse.mylyn.tasks.core.TaskRepository;
	import org.eclipse.mylyn.tasks.ui.TasksUi;
	import org.eclipse.mylyn.tasks.ui.wizards.AbstractRepositoryQueryPage;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.KeyEvent;
	import org.eclipse.swt.events.KeyListener;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Combo;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.swt.widgets.Group;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.List;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.progress.IProgressService;

	/**
	* Trac search page. Provides a form similar to the one the Bugzilla connector uses.
	*
	* @author Steffen Pingel
	*/
	public class TracQueryPage extends AbstractRepositoryQueryPage {

	private Text titleText;

	private static final int PRODUCT_HEIGHT = 60;

	private static final int STATUS_HEIGHT = 40;

	protected final static String PAGE_NAME = "TracSearchPage"; //$NON-NLS-1$

	private static final String SEARCH_URL_ID = PAGE_NAME + ".SEARCHURL"; //$NON-NLS-1$

	protected Combo summaryText = null;

	protected Combo repositoryCombo = null;

	private TextSearchField summaryField;

	private TextSearchField descriptionField;

	private ListSearchField componentField;

	private ListSearchField versionField;

	private ListSearchField milestoneField;

	private ListSearchField priorityField;

	private ListSearchField typeField;

	private ListSearchField resolutionField;

	private ListSearchField statusField;

	private Button updateButton;

	private TextSearchField keywordsField;

	private final Map<String, SearchField> searchFieldByName = new HashMap<String, SearchField>();

	private boolean firstTime = true;

	// private UserSearchField ownerField;
	//
	// private UserSearchField reporterField;
	//
	// private UserSearchField ccField;

	public TracQueryPage(TaskRepository repository, IRepositoryQuery query) {
	super(Messages.TracQueryPage_Enter_query_parameters, repository, query);
	setTitle(Messages.TracQueryPage_Enter_query_parameters);
	setDescription(Messages.TracQueryPage_If_attributes_are_blank_or_stale_press_the_Update_button);
	}

	public TracQueryPage(TaskRepository repository) {
	this(repository, null);
	}

	public void createControl(Composite parent) {
	Composite control = new Composite(parent, SWT.NONE);
	GridData gd = new GridData(GridData.FILL_BOTH);
	control.setLayoutData(gd);
	GridLayout layout = new GridLayout(4, false);
	if (inSearchContainer()) {
	layout.marginWidth = 0;
	layout.marginHeight = 0;
	}
	control.setLayout(layout);

	createTitleGroup(control);

	summaryField = new TextSearchField("summary"); //$NON-NLS-1$
	summaryField.createControls(control, Messages.TracQueryPage_Summary);

	descriptionField = new TextSearchField("description"); //$NON-NLS-1$
	descriptionField.createControls(control, Messages.TracQueryPage_Description);

	keywordsField = new TextSearchField("keywords"); //$NON-NLS-1$
	keywordsField.createControls(control, Messages.TracQueryPage_Keywords);

	createOptionsGroup(control);

	createUserGroup(control);

	if (getQuery() != null) {
	titleText.setText(getQuery().getSummary());
	TracSearch search = TracUtil.toTracSearch(getQuery());
	if (search != null) {
	restoreWidgetValues(search);
	}
	}

	Dialog.applyDialogFont(control);
	setControl(control);
	}

	@Override
	public boolean canFlipToNextPage() {
	return false;
	}

	private void restoreWidgetValues(TracSearch search) {
	java.util.List<TracSearchFilter> filters = search.getFilters();
	for (TracSearchFilter filter : filters) {
	SearchField field = searchFieldByName.get(filter.getFieldName());
	if (field != null) {
	field.setFilter(filter);
	} else {
	StatusHandler.log(new Status(IStatus.WARNING, TracUiPlugin.ID_PLUGIN,
	"Ignoring invalid search filter: " + filter)); //$NON-NLS-1$
	}
	}
	}

	private void createTitleGroup(Composite control) {
	if (inSearchContainer()) {
	return;
	}

	Label titleLabel = new Label(control, SWT.NONE);
	titleLabel.setText(Messages.TracQueryPage_Query_Title);

	titleText = new Text(control, SWT.BORDER);
	GridData gd = new GridData(GridData.FILL_HORIZONTAL \| GridData.GRAB_HORIZONTAL);
	gd.horizontalSpan = 3;
	titleText.setLayoutData(gd);
	titleText.addKeyListener(new KeyListener() {
	public void keyPressed(KeyEvent e) {
	// ignore
	}

	public void keyReleased(KeyEvent e) {
	getContainer().updateButtons();
	}
	});
	}

	protected Control createOptionsGroup(Composite control) {
	Group group = new Group(control, SWT.NONE);
	// group.setText("Ticket Attributes");
	GridLayout layout = new GridLayout();
	layout.numColumns = 1;
	group.setLayout(layout);
	GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true);
	gd.horizontalSpan = 4;
	group.setLayoutData(gd);

	createProductAttributes(group);
	createTicketAttributes(group);
	createUpdateButton(group);

	return group;
	}

	protected void createUserGroup(Composite control) {
	UserSearchField userField = new UserSearchField();
	userField.createControls(control);
	}

	/**
	* Creates the area for selection on product attributes component/version/milestone.
	*/
	protected Control createProductAttributes(Composite control) {
	Composite group = new Composite(control, SWT.NONE);
	GridLayout layout = new GridLayout();
	layout.numColumns = 3;
	group.setLayout(layout);
	GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true);
	gd.horizontalSpan = 1;
	group.setLayoutData(gd);

	Label label = new Label(group, SWT.LEFT);
	label.setText(Messages.TracQueryPage_Component);

	label = new Label(group, SWT.LEFT);
	label.setText(Messages.TracQueryPage_Version);

	label = new Label(group, SWT.LEFT);
	label.setText(Messages.TracQueryPage_Milestone);

	componentField = new ListSearchField("component"); //$NON-NLS-1$
	componentField.createControls(group, PRODUCT_HEIGHT);

	versionField = new ListSearchField("version"); //$NON-NLS-1$
	versionField.createControls(group, PRODUCT_HEIGHT);

	milestoneField = new ListSearchField("milestone"); //$NON-NLS-1$
	milestoneField.createControls(group, PRODUCT_HEIGHT);

	return group;
	}

	/**
	* Creates the area for selection of ticket attributes status/resolution/priority.
	*/
	protected Control createTicketAttributes(Composite control) {
	Composite group = new Composite(control, SWT.NONE);
	GridLayout layout = new GridLayout();
	layout.numColumns = 4;
	group.setLayout(layout);
	GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true);
	gd.horizontalSpan = 1;
	group.setLayoutData(gd);

	Label label = new Label(group, SWT.LEFT);
	label.setText(Messages.TracQueryPage_Status);

	label = new Label(group, SWT.LEFT);
	label.setText(Messages.TracQueryPage_Resolution);

	label = new Label(group, SWT.LEFT);
	label.setText(Messages.TracQueryPage_Type);

	label = new Label(group, SWT.LEFT);
	label.setText(Messages.TracQueryPage_Priority);

	statusField = new ListSearchField("status"); //$NON-NLS-1$
	statusField.createControls(group, STATUS_HEIGHT);

	resolutionField = new ListSearchField("resolution"); //$NON-NLS-1$
	resolutionField.createControls(group, STATUS_HEIGHT);

	typeField = new ListSearchField("type"); //$NON-NLS-1$
	typeField.createControls(group, STATUS_HEIGHT);

	priorityField = new ListSearchField("priority"); //$NON-NLS-1$
	priorityField.createControls(group, STATUS_HEIGHT);

	return group;
	}

	protected Control createUpdateButton(final Composite control) {
	Composite group = new Composite(control, SWT.NONE);
	GridLayout layout = new GridLayout(2, false);
	group.setLayout(layout);
	group.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

	updateButton = new Button(group, SWT.PUSH);
	updateButton.setText(Messages.TracQueryPage_Update_Attributes_from_Repository);
	updateButton.setLayoutData(new GridData());
	updateButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	if (getTaskRepository() != null) {
	updateAttributesFromRepository(true);
	} else {
	MessageDialog.openInformation(Display.getCurrent().getActiveShell(),
	Messages.TracQueryPage_Update_Attributes_Failed,
	Messages.TracQueryPage_No_repository_available);
	}
	}
	});

	return group;
	}

	@Override
	public void setVisible(boolean visible) {
	super.setVisible(visible);

	if (getSearchContainer() != null) {
	getSearchContainer().setPerformActionEnabled(true);
	}

	if (visible && firstTime) {
	firstTime = false;
	if (!hasAttributes()) {
	// delay the execution so the dialog's progress bar is visible
	// when the attributes are updated
	Display.getDefault().asyncExec(new Runnable() {
	public void run() {
	if (getControl() != null && !getControl().isDisposed()) {
	initializePage();
	}
	}

	});
	} else {
	// no remote connection is needed to get attributes therefore do
	// not use delayed execution to avoid flickering
	initializePage();
	}
	}
	}

	private void initializePage() {
	updateAttributesFromRepository(false);
	boolean restored = (getQuery() != null);
	if (inSearchContainer()) {
	restored \|= restoreWidgetValues();
	}
	if (!restored) {
	// initialize with default values
	}
	}

	private boolean hasAttributes() {
	TracRepositoryConnector connector = (TracRepositoryConnector) TasksUi.getRepositoryManager()
	.getRepositoryConnector(TracCorePlugin.CONNECTOR_KIND);
	ITracClient client = connector.getClientManager().getTracClient(getTaskRepository());
	return client.hasAttributes();
	}

	private void updateAttributesFromRepository(final boolean force) {
	TracRepositoryConnector connector = (TracRepositoryConnector) TasksUi.getRepositoryManager()
	.getRepositoryConnector(TracCorePlugin.CONNECTOR_KIND);
	final ITracClient client = connector.getClientManager().getTracClient(getTaskRepository());

	if (!client.hasAttributes() \|\| force) {
	try {
	IRunnableWithProgress runnable = new IRunnableWithProgress() {
	public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
	try {
	client.updateAttributes(monitor, force);
	} catch (TracException e) {
	throw new InvocationTargetException(e);
	}
	}
	};

	if (getContainer() != null) {
	getContainer().run(true, true, runnable);
	} else if (getSearchContainer() != null) {
	getSearchContainer().getRunnableContext().run(true, true, runnable);
	} else {
	IProgressService service = PlatformUI.getWorkbench().getProgressService();
	service.busyCursorWhile(runnable);
	}
	} catch (InvocationTargetException e) {
	setErrorMessage(TracCorePlugin.toStatus(e.getCause(), getTaskRepository()).getMessage());
	return;
	} catch (InterruptedException e) {
	return;
	}
	}

	statusField.setValues(client.getTicketStatus());
	resolutionField.setValues(client.getTicketResolutions());
	typeField.setValues(client.getTicketTypes());
	priorityField.setValues(client.getPriorities());

	componentField.setValues(client.getComponents());
	versionField.setValues(client.getVersions());
	milestoneField.setValues(client.getMilestones());
	}

	@Override
	public boolean isPageComplete() {
	if (titleText != null && titleText.getText().length() > 0) {
	return true;
	}
	return false;
	}

	public String getQueryUrl(String repsitoryUrl) {
	TracSearch search = getTracSearch();

	StringBuilder sb = new StringBuilder();
	sb.append(repsitoryUrl);
	sb.append(ITracClient.QUERY_URL);
	sb.append(search.toUrl());
	return sb.toString();
	}

	private TracSearch getTracSearch() {
	TracSearch search = new TracSearch();
	for (SearchField field : searchFieldByName.values()) {
	TracSearchFilter filter = field.getFilter();
	if (filter != null) {
	search.addFilter(filter);
	}
	}
	return search;
	}

	// public boolean performAction() {
	//
	// Proxy proxySettings = TasksUiPlugin.getDefault().getProxySettings();
	// SearchHitCollector collector = new
	// SearchHitCollector(TasksUiPlugin.getTaskList(),
	// repository, getQuery(), proxySettings);
	// NewSearchUI.runQueryInBackground(collector);
	//
	// return true;
	// }

	@Override
	public boolean performSearch() {
	if (inSearchContainer()) {
	saveState();
	}

	return super.performSearch();
	}

	@Override
	public IDialogSettings getDialogSettings() {
	IDialogSettings settings = TracUiPlugin.getDefault().getDialogSettings();
	IDialogSettings dialogSettings = settings.getSection(PAGE_NAME);
	if (dialogSettings == null) {
	dialogSettings = settings.addNewSection(PAGE_NAME);
	}
	return dialogSettings;
	}

	private boolean restoreWidgetValues() {
	IDialogSettings settings = getDialogSettings();
	String repoId = "." + getTaskRepository().getRepositoryUrl(); //$NON-NLS-1$

	String searchUrl = settings.get(SEARCH_URL_ID + repoId);
	if (searchUrl == null) {
	return false;
	}

	restoreWidgetValues(new TracSearch(searchUrl));
	return true;
	}

	@Override
	public void saveState() {
	String repoId = "." + getTaskRepository().getRepositoryUrl(); //$NON-NLS-1$
	IDialogSettings settings = getDialogSettings();
	settings.put(SEARCH_URL_ID + repoId, getTracSearch().toUrl());
	}

	private abstract class SearchField {

	protected String fieldName;

	public SearchField(String fieldName) {
	this.fieldName = fieldName;

	if (fieldName != null) {
	assert !searchFieldByName.containsKey(fieldName);
	searchFieldByName.put(fieldName, this);
	}
	}

	public String getFieldName() {
	return fieldName;
	}

	public abstract TracSearchFilter getFilter();

	public abstract void setFilter(TracSearchFilter filter);

	}

	private class TextSearchField extends SearchField {

	private Combo conditionCombo;

	protected Text searchText;

	private Label label;

	private final CompareOperator[] compareOperators = { CompareOperator.CONTAINS, CompareOperator.CONTAINS_NOT,
	CompareOperator.BEGINS_WITH, CompareOperator.ENDS_WITH, CompareOperator.IS, CompareOperator.IS_NOT, };

	public TextSearchField(String fieldName) {
	super(fieldName);
	}

	public void createControls(Composite parent, String labelText) {
	if (labelText != null) {
	label = new Label(parent, SWT.LEFT);
	label.setText(labelText);
	}

	conditionCombo = new Combo(parent, SWT.SINGLE \| SWT.BORDER \| SWT.READ_ONLY);
	for (CompareOperator op : compareOperators) {
	conditionCombo.add(op.toString());
	}
	conditionCombo.setText(compareOperators[0].toString());

	searchText = new Text(parent, SWT.BORDER);
	GridData gd = new GridData(SWT.FILL, SWT.CENTER, true, false);
	// the user search field has additional controls and no fieldName
	if (fieldName != null) {
	gd.horizontalSpan = 2;
	}
	searchText.setLayoutData(gd);
	}

	public CompareOperator getCondition() {
	return compareOperators[conditionCombo.getSelectionIndex()];
	}

	public String getSearchText() {
	return searchText.getText();
	}

	public boolean setCondition(CompareOperator operator) {
	if (conditionCombo != null) {
	int i = conditionCombo.indexOf(operator.toString());
	if (i != -1) {
	conditionCombo.select(i);
	return true;
	}
	}
	return false;
	}

	public void setSearchText(String text) {
	searchText.setText(text);
	}

	@Override
	public TracSearchFilter getFilter() {
	String text = getSearchText();
	if (text.length() == 0) {
	return null;
	}

	TracSearchFilter newFilter = new TracSearchFilter(getFieldName());
	newFilter.setOperator(getCondition());
	newFilter.addValue(getSearchText());
	return newFilter;
	}

	@Override
	public void setFilter(TracSearchFilter filter) {
	setCondition(filter.getOperator());
	java.util.List<String> values = filter.getValues();
	setSearchText(values.get(0));
	}

	public void setFieldName(String fieldName) {
	this.fieldName = fieldName;
	}

	}

	private class ListSearchField extends SearchField {

	private List list;

	public ListSearchField(String fieldName) {
	super(fieldName);
	}

	public void setValues(Object[] items) {
	// preserve selected values
	TracSearchFilter filter = getFilter();

	list.removeAll();
	if (items != null) {
	list.setEnabled(true);
	for (Object item : items) {
	list.add(item.toString());
	}

	// restore selected values
	if (filter != null) {
	setFilter(filter);
	}
	} else {
	list.setEnabled(false);
	}
	}

	public void createControls(Composite parent, int height) {
	list = new List(parent, SWT.MULTI \| SWT.V_SCROLL \| SWT.BORDER);
	GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true);
	gd.heightHint = height;
	list.setLayoutData(gd);
	}

	@Override
	public TracSearchFilter getFilter() {
	int[] indicies = list.getSelectionIndices();
	if (indicies.length == 0) {
	return null;
	}

	TracSearchFilter newFilter = new TracSearchFilter(getFieldName());
	newFilter.setOperator(CompareOperator.IS);
	for (int i : indicies) {
	newFilter.addValue(list.getItem(i));
	}
	return newFilter;
	}

	@Override
	public void setFilter(TracSearchFilter filter) {
	list.deselectAll();
	java.util.List<String> values = filter.getValues();
	for (String item : values) {
	int i = list.indexOf(item);
	if (i != -1) {
	list.select(i);
	} else {
	list.add(item, 0);
	list.select(0);
	}
	}
	}

	public void selectItems(String[] items) {
	list.deselectAll();
	for (String item : items) {
	int i = list.indexOf(item);
	if (i != -1) {
	list.select(i);
	}
	}
	}

	}

	private class UserSearchField extends SearchField {

	private final TextSearchField textField;

	private Combo userCombo;

	public UserSearchField() {
	super(null);

	textField = new TextSearchField(null);

	new UserSelectionSearchField("owner", 0); //$NON-NLS-1$

	new UserSelectionSearchField("reporter", 1); //$NON-NLS-1$

	new UserSelectionSearchField("cc", 2); //$NON-NLS-1$
	}

	public void createControls(Composite parent) {
	userCombo = new Combo(parent, SWT.SINGLE \| SWT.BORDER \| SWT.READ_ONLY);
	userCombo.add(Messages.TracQueryPage_Owner);
	userCombo.add(Messages.TracQueryPage_Reporter);
	userCombo.add(Messages.TracQueryPage_CC);
	userCombo.select(0);

	textField.createControls(parent, null);
	}

	@Override
	public TracSearchFilter getFilter() {
	return null;
	}

	@Override
	public void setFilter(TracSearchFilter filter) {
	}

	private void setSelection(int index) {
	userCombo.select(index);
	}

	private int getSelection() {
	return userCombo.getSelectionIndex();
	}

	class UserSelectionSearchField extends SearchField {

	private final int index;

	public UserSelectionSearchField(String fieldName, int index) {
	super(fieldName);

	this.index = index;
	}

	@Override
	public TracSearchFilter getFilter() {
	if (index == getSelection()) {
	textField.setFieldName(fieldName);
	return textField.getFilter();
	}
	return null;
	}

	@Override
	public void setFilter(TracSearchFilter filter) {
	textField.setFieldName(fieldName);
	textField.setFilter(filter);
	setSelection(index);
	}

	}

	}

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

	@Override
	public void applyTo(IRepositoryQuery query) {
	query.setUrl(getQueryUrl(getTaskRepository().getRepositoryUrl()));
	query.setSummary(getQueryTitle());
	}

	}