org.eclipse.mylyn.tasks.search/src/org/eclipse/mylyn/internal/tasks/ui/TaskSearchPage.java - mylyn/org.eclipse.mylyn.tasks - Git at Google

 /*******************************************************************************
  * Copyright (c) 2004, 2016 Tasktop Technologies and others.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0 which is available at
  * https://www.eclipse.org/legal/epl-2.0
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *     Tasktop Technologies - initial API and implementation
  *******************************************************************************/

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

 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;

 import org.eclipse.core.runtime.ISafeRunnable;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.SafeRunner;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.dialogs.DialogPage;
 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.dialogs.MessageDialog;
 import org.eclipse.jface.layout.GridDataFactory;
 import org.eclipse.jface.operation.IRunnableContext;
 import org.eclipse.mylyn.commons.core.StatusHandler;
 import org.eclipse.mylyn.commons.ui.CommonImages;
 import org.eclipse.mylyn.internal.tasks.ui.search.SearchHitCollector;
 import org.eclipse.mylyn.internal.tasks.ui.util.TasksUiInternal;
 import org.eclipse.mylyn.internal.tasks.ui.views.TaskListView;
 import org.eclipse.mylyn.tasks.core.AbstractRepositoryConnector;
 import org.eclipse.mylyn.tasks.core.IRepositoryQuery;
 import org.eclipse.mylyn.tasks.core.TaskRepository;
 import org.eclipse.mylyn.tasks.ui.AbstractRepositoryConnectorUi;
 import org.eclipse.mylyn.tasks.ui.TasksUi;
 import org.eclipse.mylyn.tasks.ui.TasksUiUtil;
 import org.eclipse.mylyn.tasks.ui.wizards.AbstractRepositoryQueryPage;
 import org.eclipse.mylyn.tasks.ui.wizards.ITaskSearchPage;
 import org.eclipse.mylyn.tasks.ui.wizards.ITaskSearchPageContainer;
 import org.eclipse.search.internal.ui.SearchPlugin;
 import org.eclipse.search.ui.ISearchPage;
 import org.eclipse.search.ui.ISearchPageContainer;
 import org.eclipse.search.ui.ISearchQuery;
 import org.eclipse.search.ui.ISearchResultViewPart;
 import org.eclipse.search.ui.NewSearchUI;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.dnd.Clipboard;
 import org.eclipse.swt.dnd.TextTransfer;
 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.Combo;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.IWorkbenchPage;
 import org.eclipse.ui.IWorkbenchPart;
 import org.eclipse.ui.IWorkbenchWindow;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.forms.events.HyperlinkAdapter;
 import org.eclipse.ui.forms.events.HyperlinkEvent;
 import org.eclipse.ui.forms.widgets.Hyperlink;
 import org.eclipse.ui.forms.widgets.ImageHyperlink;

 /**
  * @author Rob Elves
  * @author Mik Kersten
  * @author Steffen Pingel
  */
 public class TaskSearchPage extends DialogPage implements ISearchPage {

 	public static final String ID = "org.eclipse.mylyn.tasks.ui.search.page"; //$NON-NLS-1$

 	private static final String PAGE_KEY = "page"; //$NON-NLS-1$

 	private static final String PAGE_NAME = "TaskSearchPage"; //$NON-NLS-1$

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

 	private Combo repositoryCombo;

 	private Text keyText;

 	private TaskRepository repository;

 	private Composite fParentComposite;

 	private IDialogSettings fDialogSettings;

 	private int currentPageIndex = -1;

 	private boolean firstView = true;

 	private Control[] queryPages;

 	private ISearchPageContainer pageContainer;

 	private ITaskSearchPageContainer taskSearchPageContainer;

 	private ImageHyperlink clearKey;

 	public boolean performAction() {
 		saveDialogSettings();
 		String key = keyText.getText();
 		if (key != null && key.trim().length() > 0) {
 			key = key.trim();
 			boolean openSuccessful = TasksUiInternal.openTaskByIdOrKey(repository, key, null);
 			if (!openSuccessful) {
 				MessageDialog.openInformation(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),
 						Messages.TaskSearchPage_Task_Search, Messages.TaskSearchPage_No_task_found_matching_key_ + key);
 			}
 			return openSuccessful;
 		} else {
 			ITaskSearchPage page = (ITaskSearchPage) queryPages[currentPageIndex].getData(PAGE_KEY);
 			return page.performSearch();
 		}
 	}

 	public void setContainer(ISearchPageContainer container) {
 		this.pageContainer = container;
 		this.taskSearchPageContainer = new ITaskSearchPageContainer() {
 			public IRunnableContext getRunnableContext() {
 				return pageContainer.getRunnableContext();
 			}

 			public void setPerformActionEnabled(boolean enabled) {
 				pageContainer.setPerformActionEnabled(enabled);
 			}
 		};
 	}

 	public void createControl(Composite parent) {
 		fParentComposite = new Composite(parent, SWT.NONE);
 		GridLayout layout = new GridLayout(1, false);
 		// layout.marginHeight = 0;
 		// layout.marginWidth = 0;
 		fParentComposite.setLayout(layout);
 		GridData gd = new GridData(GridData.FILL_BOTH);
 		fParentComposite.setLayoutData(gd);

 		createRepositoryGroup(fParentComposite);

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

 	private void createRepositoryGroup(Composite control) {
 		Composite group = new Composite(control, SWT.NONE);
 		GridLayout layout = new GridLayout(6, false);
 		layout.marginWidth = 0;
 		layout.marginHeight = 0;
 		group.setLayout(layout);
 		GridData gd = new GridData(GridData.FILL_HORIZONTAL);
 		group.setLayoutData(gd);

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

 		repositoryCombo = new Combo(group, SWT.SINGLE | SWT.BORDER | SWT.READ_ONLY);
 		repositoryCombo.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				displayQueryPage(repositoryCombo.getSelectionIndex());
 			}
 		});
 		label = new Label(group, SWT.NONE);
 		label.setText("  "); //$NON-NLS-1$

 		Label labelKey = new Label(group, SWT.NONE);
 		labelKey.setText(Messages.TaskSearchPage_Task_Key_ID);
 		keyText = new Text(group, SWT.BORDER);
 		keyText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL));

 		String findText = null;
 		TaskListView taskListView = TaskListView.getFromActivePerspective();
 		if (taskListView != null) {
 			findText = taskListView.getFilteredTree().getFilterControl().getText();
 			if (findText != null && findText.trim().length() > 0 && isTaskKeyCandidate(findText.trim())) {
 				pageContainer.setPerformActionEnabled(true);
 				keyText.setText(findText.trim());
 				keyText.setFocus();
 			}
 		}

 		keyText.addKeyListener(new KeyListener() {

 			public void keyPressed(KeyEvent e) {
 				// ignore
 			}

 			public void keyReleased(KeyEvent e) {
 				updatePageEnablement();
 			}
 		});

 		clearKey = new ImageHyperlink(group, SWT.NONE);
 		clearKey.setImage(CommonImages.getImage(CommonImages.REMOVE));
 		clearKey.addHyperlinkListener(new HyperlinkAdapter() {

 			@Override
 			public void linkActivated(HyperlinkEvent e) {
 				keyText.setText(""); //$NON-NLS-1$
 				updatePageEnablement();
 			}
 		});
 	}

 	private void updatePageEnablement() {
 		if (keyText.getText() != null && keyText.getText().trim().length() > 0) {
 			//setControlsEnabled(queryPages[currentPageIndex], false);
 			if (queryPages != null && queryPages[currentPageIndex] != null
 					&& queryPages[currentPageIndex].getData(PAGE_KEY) instanceof AbstractRepositoryQueryPage) {
 				((AbstractRepositoryQueryPage) queryPages[currentPageIndex].getData(PAGE_KEY))
 						.setControlsEnabled(false);
 			}
 			if (repositoryCombo.getSelectionIndex() > -1) {
 				pageContainer.setPerformActionEnabled(true);
 			}
 		} else {
 			//setControlsEnabled(queryPages[currentPageIndex], true);
 			if (queryPages != null && queryPages[currentPageIndex] != null
 					&& queryPages[currentPageIndex].getData(PAGE_KEY) instanceof AbstractRepositoryQueryPage) {
 				((AbstractRepositoryQueryPage) queryPages[currentPageIndex].getData(PAGE_KEY)).setControlsEnabled(true);
 			}
 			//setControlsEnabled(queryPages[currentPageIndex], true);
 			//pageContainer.setPerformActionEnabled(false);
 		}
 		if (keyText != null && repositoryCombo != null && clearKey != null) {
 			boolean hasRepos = repositoryCombo.getItemCount() > 0;
 			keyText.setEnabled(hasRepos);
 			repositoryCombo.setEnabled(hasRepos);
 			clearKey.setEnabled(hasRepos);
 		}
 	}

 	private Control createPage(TaskRepository repository, ITaskSearchPage searchPage) {
 		// Page wrapper
 		final Composite pageWrapper = new Composite(fParentComposite, SWT.NONE);
 		pageWrapper.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
 		// m4.0 replace with FillLayout
 		GridLayout layout = new GridLayout();
 		layout.marginWidth = 0;
 		layout.marginHeight = 0;
 		pageWrapper.setLayout(layout);

 		try {
 			searchPage.setContainer(taskSearchPageContainer);
 			searchPage.createControl(pageWrapper);
 		} catch (Exception e) {
 			pageWrapper.dispose();
 			searchPage.dispose();

 			searchPage = createErrorPage(repository, e);
 			return searchPage.getControl();
 		}

 		// XXX: work around for initial search page size issue bug#198493
 		IDialogSettings searchDialogSettings = SearchPlugin.getDefault()
 				.getDialogSettingsSection("DialogBounds_SearchDialog"); //$NON-NLS-1$
 		if (searchDialogSettings.get("DIALOG_WIDTH") == null) { //$NON-NLS-1$
 			fParentComposite.getParent().getShell().pack();
 		}
 		pageWrapper.setData(PAGE_KEY, searchPage);
 		return pageWrapper;
 	}

 	private ITaskSearchPage createErrorPage(TaskRepository repository, Throwable e) {
 		ITaskSearchPage searchPage;
 		Status status = new Status(IStatus.ERROR, TasksUiPlugin.ID_PLUGIN,
 				"Error occurred while constructing search page for " + repository.getRepositoryUrl() + " [" //$NON-NLS-1$ //$NON-NLS-2$
 						+ repository.getConnectorKind() + "]", //$NON-NLS-1$
 				e);
 		StatusHandler.log(status);

 		searchPage = new DeadSearchPage(repository, status);
 		searchPage.setContainer(taskSearchPageContainer);
 		searchPage.createControl(fParentComposite);
 		searchPage.getControl().setData(PAGE_KEY, searchPage);
 		return searchPage;
 	}

 	private void displayQueryPage(final int pageIndex) {
 		if (currentPageIndex == pageIndex || pageIndex < 0) {
 			return;
 		}

 		// TODO: if repository == null display invalid page?
 		if (currentPageIndex != -1 && queryPages[currentPageIndex] != null) {
 			queryPages[currentPageIndex].setVisible(false);
 			ITaskSearchPage page = (ITaskSearchPage) queryPages[currentPageIndex].getData(PAGE_KEY);
 			page.setVisible(false);
 			GridData data = (GridData) queryPages[currentPageIndex].getLayoutData();
 			data.exclude = true;
 			queryPages[currentPageIndex].setLayoutData(data);
 		}

 		String repositoryLabel = repositoryCombo.getItem(pageIndex);
 		repository = (TaskRepository) repositoryCombo.getData(repositoryLabel);

 		if (queryPages[pageIndex] == null) {
 			if (repository != null) {
 				final AbstractRepositoryConnectorUi connectorUi = TasksUiPlugin
 						.getConnectorUi(repository.getConnectorKind());
 				if (connectorUi != null) {
 					SafeRunner.run(new ISafeRunnable() {
 						public void run() throws Exception {
 							ITaskSearchPage searchPage = getSearchPage(connectorUi);
 							if (searchPage != null) {
 								queryPages[pageIndex] = createPage(repository, searchPage);
 							} else {
 								AbstractRepositoryConnector connector = TasksUi.getRepositoryManager()
 										.getRepositoryConnector(repository.getConnectorKind());
 								if (connector.canCreateTaskFromKey(repository)) {
 									queryPages[pageIndex] = createPage(repository, new NoSearchPage(repository));
 								}
 							}
 						}

 						public void handleException(Throwable e) {
 							ITaskSearchPage page = createErrorPage(repository, e);
 							queryPages[pageIndex] = page.getControl();
 						}
 					});
 				}

 			}
 		}

 		// update enablement of the task id field
 		if (repository != null) {
 			AbstractRepositoryConnector connector = TasksUi.getRepositoryManager()
 					.getRepositoryConnector(repository.getConnectorKind());
 			if (connector.canCreateTaskFromKey(repository)) {
 				keyText.setEnabled(true);
 			} else {
 				keyText.setEnabled(false);
 			}
 		}

 		if (queryPages[pageIndex] != null) {
 			GridData data = (GridData) queryPages[pageIndex].getLayoutData();
 			if (data == null) {
 				data = new GridData();
 			}
 			data.exclude = false;
 			queryPages[pageIndex].setLayoutData(data);
 			queryPages[pageIndex].setVisible(true);
 			ITaskSearchPage page = (ITaskSearchPage) queryPages[pageIndex].getData(PAGE_KEY);
 			page.setVisible(true);
 		}

 		currentPageIndex = pageIndex;
 		fParentComposite.getParent().layout(true, true);
 		updatePageEnablement();

 	}

 	private ITaskSearchPage getSearchPage(AbstractRepositoryConnectorUi connectorUi) {
 		if (connectorUi.hasSearchPage()) {
 			return connectorUi.getSearchPage(repository, null);
 		}
 		return null;
 	}

 	@Override
 	public void setVisible(boolean visible) {
 		if (firstView) {
 			firstView = false;
 			getControl().setLayoutData(new GridData(GridData.FILL, GridData.FILL, true, true));

 			List<TaskRepository> repositories = TasksUi.getRepositoryManager().getAllRepositories();
 			List<TaskRepository> searchableRepositories = new ArrayList<TaskRepository>(repositories.size());
 			for (TaskRepository repository : repositories) {
 				AbstractRepositoryConnectorUi connectorUi = TasksUiPlugin.getConnectorUi(repository.getConnectorKind());
 				AbstractRepositoryConnector connector = TasksUi.getRepositoryManager()
 						.getRepositoryConnector(repository.getConnectorKind());
 				if ((connectorUi != null && connectorUi.hasSearchPage() && !repository.isOffline())
 						|| connector.canCreateTaskFromKey(repository)) {
 					searchableRepositories.add(repository);
 				}
 			}

 			Collections.sort(searchableRepositories, new TaskRepositoryComparator());

 			String[] repositoryUrls = new String[searchableRepositories.size()];
 			int i = 0;
 			int indexToSelect = 0;
 			for (TaskRepository currRepsitory : searchableRepositories) {
 				if (repository != null && repository.equals(currRepsitory)) {
 					indexToSelect = i;
 				}
 				repositoryUrls[i] = currRepsitory.getRepositoryUrl();
 				i++;
 			}

 			IDialogSettings settings = getDialogSettings();
 			if (repositoryCombo != null) {
 				for (int x = 0; x < searchableRepositories.size(); x++) {
 					repositoryCombo.add(searchableRepositories.get(x).getRepositoryLabel());
 					repositoryCombo.setData(searchableRepositories.get(x).getRepositoryLabel(),
 							searchableRepositories.get(x));
 				}
 				if (searchableRepositories.isEmpty()) {
 					if (repositories.isEmpty()) {
 						MessageDialog.openInformation(Display.getCurrent().getActiveShell(),
 								Messages.TaskSearchPage_Repository_Search,
 								Messages.TaskSearchPage_no_available_repositories);
 					} else {
 						MessageDialog.openInformation(Display.getCurrent().getActiveShell(),
 								Messages.TaskSearchPage_Repository_Search,
 								Messages.TaskSearchPage_no_searchable_repositories);
 					}
 				} else {
 					String selectRepo = settings.get(STORE_REPO_ID);
 					if (selectRepo != null && repositoryCombo.indexOf(selectRepo) > -1) {
 						repositoryCombo.select(repositoryCombo.indexOf(selectRepo));
 						repository = (TaskRepository) repositoryCombo.getData(selectRepo);
 						if (repository == null) {
 							// TODO: Display no repository error
 						}
 					} else {
 						repositoryCombo.select(indexToSelect);
 					}

 					// TODO: Create one page per connector and repopulate based on repository
 					queryPages = new Control[repositoryUrls.length];
 					displayQueryPage(repositoryCombo.getSelectionIndex());
 					// updateAttributesFromRepository(repositoryCombo.getText(),
 					// null, false);
 				}
 			}
 		}

 		if (queryPages == null) {
 			pageContainer.setPerformActionEnabled(false);
 		}

 		super.setVisible(visible);

 		setDefaultValuesAndFocus();
 	}

 	private void setDefaultValuesAndFocus() {
 		IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
 		if (window != null) {
 			IWorkbenchPage page = window.getActivePage();
 			if (page != null) {
 				String repositoryUrl = null;
 				IWorkbenchPart part = page.getActivePart();
 				if (part instanceof ISearchResultViewPart) {
 					ISearchQuery[] queries = NewSearchUI.getQueries();
 					if (queries.length > 0) {
 						if (queries[0] instanceof SearchHitCollector) {
 							repositoryUrl = ((SearchHitCollector) queries[0]).getRepositoryQuery().getRepositoryUrl();
 						}
 					}
 				}
 //				if (repositoryUrl == null) {
 //					IEditorPart editor = page.getActiveEditor();
 //					if (editor instanceof TaskEditor) {
 //						repositoryUrl = ((TaskEditor) editor).getTaskEditorInput().getTask().getRepositoryUrl();
 //					}
 //				}
 //				if (repositoryUrl == null) {
 //					TaskListView taskListView = TaskListView.getFromActivePerspective();
 //					if (taskListView != null) {
 //						AbstractTask selectedTask = taskListView.getSelectedTask();
 //						if (selectedTask != null) {
 //							repositoryUrl = selectedTask.getRepositoryUrl();
 //						}
 //					}
 //				}
 				if (repositoryUrl != null) {
 					TaskRepository repository = TasksUiPlugin.getRepositoryManager().getRepository(repositoryUrl);
 					if (repository != null) {
 						int index = 0;
 						for (String repositoryLabel : repositoryCombo.getItems()) {
 							if (repositoryLabel.equals(repository.getRepositoryLabel())) {
 								repositoryCombo.select(index);
 							}
 							index++;
 						}
 						displayQueryPage(repositoryCombo.getSelectionIndex());
 					}
 				}
 			}
 		}

 		if (keyText.getText() != null && keyText.getText().trim().length() > 0) {
 			keyText.setFocus();
 			keyText.setSelection(0, keyText.getText().length());
 		} else {
 			Clipboard clipboard = new Clipboard(Display.getDefault());
 			TextTransfer transfer = TextTransfer.getInstance();
 			String contents = (String) clipboard.getContents(transfer);
 			if (contents != null) {
 				if (isTaskKeyCandidate(contents.trim())) {
 					keyText.setText(contents.trim());
 					keyText.setFocus();
 					keyText.setSelection(0, keyText.getText().length());
 				}
 			}
 		}
 		updatePageEnablement();
 	}

 	private boolean isTaskKeyCandidate(String contents) {
 		boolean looksLikeKey = false;
 		try {
 			Integer.parseInt(contents);
 			looksLikeKey = true;
 		} catch (NumberFormatException nfe) {
 		}
 		if (!looksLikeKey) {
 			try {
 				Integer.parseInt(contents.substring(contents.lastIndexOf('-')));
 				looksLikeKey = true;
 			} catch (Exception e) {
 			}
 		}
 		return looksLikeKey;
 	}

 	public IDialogSettings getDialogSettings() {
 		IDialogSettings settings = TasksUiPlugin.getDefault().getDialogSettings();
 		fDialogSettings = settings.getSection(PAGE_NAME);
 		if (fDialogSettings == null) {
 			fDialogSettings = settings.addNewSection(PAGE_NAME);
 		}
 		return fDialogSettings;
 	}

 	private void saveDialogSettings() {
 		IDialogSettings settings = getDialogSettings();
 		settings.put(STORE_REPO_ID, repositoryCombo.getText());
 	}

 	@Override
 	public void dispose() {
 		if (queryPages != null) {
 			for (Control control : queryPages) {
 				if (control != null) {
 					ITaskSearchPage page = (ITaskSearchPage) control.getData(PAGE_KEY);
 					page.dispose();
 				}
 			}
 		}
 		super.dispose();
 	}

 	private class DeadSearchPage extends AbstractRepositoryQueryPage {

 		public DeadSearchPage(TaskRepository rep, Status status) {
 			super("Search page error", rep); //$NON-NLS-1$
 		}

 		public void createControl(Composite parent) {
 			Hyperlink hyperlink = new Hyperlink(parent, SWT.NONE);
 			hyperlink.setText(Messages.TaskSearchPage_ERROR_Unable_to_present_query_page);
 			hyperlink.setUnderlined(true);
 			hyperlink.addHyperlinkListener(new HyperlinkAdapter() {
 				@Override
 				public void linkActivated(HyperlinkEvent e) {
 					TaskSearchPage.this.getControl().getShell().close();
 					TasksUiUtil.openEditRepositoryWizard(getTaskRepository());
 					// TODO: Re-construct this page with new
 					// repository data
 				}

 			});

 			GridDataFactory.fillDefaults().grab(true, true).applyTo(hyperlink);
 			setControl(hyperlink);
 		}

 		@Override
 		public IRepositoryQuery getQuery() {
 			return null;
 		}

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

 		@Override
 		public void setVisible(boolean visible) {
 			super.setVisible(visible);
 			if (visible) {
 				getSearchContainer().setPerformActionEnabled(false);
 			}
 		}

 		@Override
 		public String getQueryTitle() {
 			return null;
 		}

 		@Override
 		public void applyTo(IRepositoryQuery query) {
 			// ignore
 		}

 	}

 	private class NoSearchPage extends AbstractRepositoryQueryPage {

 		public NoSearchPage(TaskRepository rep) {
 			super("No search page", rep); //$NON-NLS-1$
 		}

 		public void createControl(Composite parent) {
 			Composite composite = new Composite(parent, SWT.NONE);
 			composite.setLayout(new GridLayout());
 			Dialog.applyDialogFont(composite);
 			setControl(composite);
 		}

 		@Override
 		public IRepositoryQuery getQuery() {
 			return null;
 		}

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

 		@Override
 		public void setVisible(boolean visible) {
 			super.setVisible(visible);
 			if (visible) {
 				getSearchContainer().setPerformActionEnabled(false);
 			}
 		}

 		@Override
 		public String getQueryTitle() {
 			return null;
 		}

 		@Override
 		public void applyTo(IRepositoryQuery query) {
 			// ignore
 		}

 	}
 }
	/*******************************************************************************
	* Copyright (c) 2004, 2016 Tasktop Technologies and others.
	*
	* This program and the accompanying materials are made available under the
	* terms of the Eclipse Public License v. 2.0 which is available at
	* https://www.eclipse.org/legal/epl-2.0
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* Tasktop Technologies - initial API and implementation
	*******************************************************************************/

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

	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.List;

	import org.eclipse.core.runtime.ISafeRunnable;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.SafeRunner;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.dialogs.DialogPage;
	import org.eclipse.jface.dialogs.IDialogSettings;
	import org.eclipse.jface.dialogs.MessageDialog;
	import org.eclipse.jface.layout.GridDataFactory;
	import org.eclipse.jface.operation.IRunnableContext;
	import org.eclipse.mylyn.commons.core.StatusHandler;
	import org.eclipse.mylyn.commons.ui.CommonImages;
	import org.eclipse.mylyn.internal.tasks.ui.search.SearchHitCollector;
	import org.eclipse.mylyn.internal.tasks.ui.util.TasksUiInternal;
	import org.eclipse.mylyn.internal.tasks.ui.views.TaskListView;
	import org.eclipse.mylyn.tasks.core.AbstractRepositoryConnector;
	import org.eclipse.mylyn.tasks.core.IRepositoryQuery;
	import org.eclipse.mylyn.tasks.core.TaskRepository;
	import org.eclipse.mylyn.tasks.ui.AbstractRepositoryConnectorUi;
	import org.eclipse.mylyn.tasks.ui.TasksUi;
	import org.eclipse.mylyn.tasks.ui.TasksUiUtil;
	import org.eclipse.mylyn.tasks.ui.wizards.AbstractRepositoryQueryPage;
	import org.eclipse.mylyn.tasks.ui.wizards.ITaskSearchPage;
	import org.eclipse.mylyn.tasks.ui.wizards.ITaskSearchPageContainer;
	import org.eclipse.search.internal.ui.SearchPlugin;
	import org.eclipse.search.ui.ISearchPage;
	import org.eclipse.search.ui.ISearchPageContainer;
	import org.eclipse.search.ui.ISearchQuery;
	import org.eclipse.search.ui.ISearchResultViewPart;
	import org.eclipse.search.ui.NewSearchUI;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.dnd.Clipboard;
	import org.eclipse.swt.dnd.TextTransfer;
	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.Combo;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.ui.IWorkbenchPage;
	import org.eclipse.ui.IWorkbenchPart;
	import org.eclipse.ui.IWorkbenchWindow;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.forms.events.HyperlinkAdapter;
	import org.eclipse.ui.forms.events.HyperlinkEvent;
	import org.eclipse.ui.forms.widgets.Hyperlink;
	import org.eclipse.ui.forms.widgets.ImageHyperlink;

	/**
	* @author Rob Elves
	* @author Mik Kersten
	* @author Steffen Pingel
	*/
	public class TaskSearchPage extends DialogPage implements ISearchPage {

	public static final String ID = "org.eclipse.mylyn.tasks.ui.search.page"; //$NON-NLS-1$

	private static final String PAGE_KEY = "page"; //$NON-NLS-1$

	private static final String PAGE_NAME = "TaskSearchPage"; //$NON-NLS-1$

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

	private Combo repositoryCombo;

	private Text keyText;

	private TaskRepository repository;

	private Composite fParentComposite;

	private IDialogSettings fDialogSettings;

	private int currentPageIndex = -1;

	private boolean firstView = true;

	private Control[] queryPages;

	private ISearchPageContainer pageContainer;

	private ITaskSearchPageContainer taskSearchPageContainer;

	private ImageHyperlink clearKey;

	public boolean performAction() {
	saveDialogSettings();
	String key = keyText.getText();
	if (key != null && key.trim().length() > 0) {
	key = key.trim();
	boolean openSuccessful = TasksUiInternal.openTaskByIdOrKey(repository, key, null);
	if (!openSuccessful) {
	MessageDialog.openInformation(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(),
	Messages.TaskSearchPage_Task_Search, Messages.TaskSearchPage_No_task_found_matching_key_ + key);
	}
	return openSuccessful;
	} else {
	ITaskSearchPage page = (ITaskSearchPage) queryPages[currentPageIndex].getData(PAGE_KEY);
	return page.performSearch();
	}
	}

	public void setContainer(ISearchPageContainer container) {
	this.pageContainer = container;
	this.taskSearchPageContainer = new ITaskSearchPageContainer() {
	public IRunnableContext getRunnableContext() {
	return pageContainer.getRunnableContext();
	}

	public void setPerformActionEnabled(boolean enabled) {
	pageContainer.setPerformActionEnabled(enabled);
	}
	};
	}

	public void createControl(Composite parent) {
	fParentComposite = new Composite(parent, SWT.NONE);
	GridLayout layout = new GridLayout(1, false);
	// layout.marginHeight = 0;
	// layout.marginWidth = 0;
	fParentComposite.setLayout(layout);
	GridData gd = new GridData(GridData.FILL_BOTH);
	fParentComposite.setLayoutData(gd);

	createRepositoryGroup(fParentComposite);

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

	private void createRepositoryGroup(Composite control) {
	Composite group = new Composite(control, SWT.NONE);
	GridLayout layout = new GridLayout(6, false);
	layout.marginWidth = 0;
	layout.marginHeight = 0;
	group.setLayout(layout);
	GridData gd = new GridData(GridData.FILL_HORIZONTAL);
	group.setLayoutData(gd);

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

	repositoryCombo = new Combo(group, SWT.SINGLE \| SWT.BORDER \| SWT.READ_ONLY);
	repositoryCombo.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	displayQueryPage(repositoryCombo.getSelectionIndex());
	}
	});
	label = new Label(group, SWT.NONE);
	label.setText(" "); //$NON-NLS-1$

	Label labelKey = new Label(group, SWT.NONE);
	labelKey.setText(Messages.TaskSearchPage_Task_Key_ID);
	keyText = new Text(group, SWT.BORDER);
	keyText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL \| GridData.GRAB_HORIZONTAL));

	String findText = null;
	TaskListView taskListView = TaskListView.getFromActivePerspective();
	if (taskListView != null) {
	findText = taskListView.getFilteredTree().getFilterControl().getText();
	if (findText != null && findText.trim().length() > 0 && isTaskKeyCandidate(findText.trim())) {
	pageContainer.setPerformActionEnabled(true);
	keyText.setText(findText.trim());
	keyText.setFocus();
	}
	}

	keyText.addKeyListener(new KeyListener() {

	public void keyPressed(KeyEvent e) {
	// ignore
	}

	public void keyReleased(KeyEvent e) {
	updatePageEnablement();
	}
	});

	clearKey = new ImageHyperlink(group, SWT.NONE);
	clearKey.setImage(CommonImages.getImage(CommonImages.REMOVE));
	clearKey.addHyperlinkListener(new HyperlinkAdapter() {

	@Override
	public void linkActivated(HyperlinkEvent e) {
	keyText.setText(""); //$NON-NLS-1$
	updatePageEnablement();
	}
	});
	}

	private void updatePageEnablement() {
	if (keyText.getText() != null && keyText.getText().trim().length() > 0) {
	//setControlsEnabled(queryPages[currentPageIndex], false);
	if (queryPages != null && queryPages[currentPageIndex] != null
	&& queryPages[currentPageIndex].getData(PAGE_KEY) instanceof AbstractRepositoryQueryPage) {
	((AbstractRepositoryQueryPage) queryPages[currentPageIndex].getData(PAGE_KEY))
	.setControlsEnabled(false);
	}
	if (repositoryCombo.getSelectionIndex() > -1) {
	pageContainer.setPerformActionEnabled(true);
	}
	} else {
	//setControlsEnabled(queryPages[currentPageIndex], true);
	if (queryPages != null && queryPages[currentPageIndex] != null
	&& queryPages[currentPageIndex].getData(PAGE_KEY) instanceof AbstractRepositoryQueryPage) {
	((AbstractRepositoryQueryPage) queryPages[currentPageIndex].getData(PAGE_KEY)).setControlsEnabled(true);
	}
	//setControlsEnabled(queryPages[currentPageIndex], true);
	//pageContainer.setPerformActionEnabled(false);
	}
	if (keyText != null && repositoryCombo != null && clearKey != null) {
	boolean hasRepos = repositoryCombo.getItemCount() > 0;
	keyText.setEnabled(hasRepos);
	repositoryCombo.setEnabled(hasRepos);
	clearKey.setEnabled(hasRepos);
	}
	}

	private Control createPage(TaskRepository repository, ITaskSearchPage searchPage) {
	// Page wrapper
	final Composite pageWrapper = new Composite(fParentComposite, SWT.NONE);
	pageWrapper.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
	// m4.0 replace with FillLayout
	GridLayout layout = new GridLayout();
	layout.marginWidth = 0;
	layout.marginHeight = 0;
	pageWrapper.setLayout(layout);

	try {
	searchPage.setContainer(taskSearchPageContainer);
	searchPage.createControl(pageWrapper);
	} catch (Exception e) {
	pageWrapper.dispose();
	searchPage.dispose();

	searchPage = createErrorPage(repository, e);
	return searchPage.getControl();
	}

	// XXX: work around for initial search page size issue bug#198493
	IDialogSettings searchDialogSettings = SearchPlugin.getDefault()
	.getDialogSettingsSection("DialogBounds_SearchDialog"); //$NON-NLS-1$
	if (searchDialogSettings.get("DIALOG_WIDTH") == null) { //$NON-NLS-1$
	fParentComposite.getParent().getShell().pack();
	}
	pageWrapper.setData(PAGE_KEY, searchPage);
	return pageWrapper;
	}

	private ITaskSearchPage createErrorPage(TaskRepository repository, Throwable e) {
	ITaskSearchPage searchPage;
	Status status = new Status(IStatus.ERROR, TasksUiPlugin.ID_PLUGIN,
	"Error occurred while constructing search page for " + repository.getRepositoryUrl() + " [" //$NON-NLS-1$ //$NON-NLS-2$
	+ repository.getConnectorKind() + "]", //$NON-NLS-1$
	e);
	StatusHandler.log(status);

	searchPage = new DeadSearchPage(repository, status);
	searchPage.setContainer(taskSearchPageContainer);
	searchPage.createControl(fParentComposite);
	searchPage.getControl().setData(PAGE_KEY, searchPage);
	return searchPage;
	}

	private void displayQueryPage(final int pageIndex) {
	if (currentPageIndex == pageIndex \|\| pageIndex < 0) {
	return;
	}

	// TODO: if repository == null display invalid page?
	if (currentPageIndex != -1 && queryPages[currentPageIndex] != null) {
	queryPages[currentPageIndex].setVisible(false);
	ITaskSearchPage page = (ITaskSearchPage) queryPages[currentPageIndex].getData(PAGE_KEY);
	page.setVisible(false);
	GridData data = (GridData) queryPages[currentPageIndex].getLayoutData();
	data.exclude = true;
	queryPages[currentPageIndex].setLayoutData(data);
	}

	String repositoryLabel = repositoryCombo.getItem(pageIndex);
	repository = (TaskRepository) repositoryCombo.getData(repositoryLabel);

	if (queryPages[pageIndex] == null) {
	if (repository != null) {
	final AbstractRepositoryConnectorUi connectorUi = TasksUiPlugin
	.getConnectorUi(repository.getConnectorKind());
	if (connectorUi != null) {
	SafeRunner.run(new ISafeRunnable() {
	public void run() throws Exception {
	ITaskSearchPage searchPage = getSearchPage(connectorUi);
	if (searchPage != null) {
	queryPages[pageIndex] = createPage(repository, searchPage);
	} else {
	AbstractRepositoryConnector connector = TasksUi.getRepositoryManager()
	.getRepositoryConnector(repository.getConnectorKind());
	if (connector.canCreateTaskFromKey(repository)) {
	queryPages[pageIndex] = createPage(repository, new NoSearchPage(repository));
	}
	}
	}

	public void handleException(Throwable e) {
	ITaskSearchPage page = createErrorPage(repository, e);
	queryPages[pageIndex] = page.getControl();
	}
	});
	}

	}
	}

	// update enablement of the task id field
	if (repository != null) {
	AbstractRepositoryConnector connector = TasksUi.getRepositoryManager()
	.getRepositoryConnector(repository.getConnectorKind());
	if (connector.canCreateTaskFromKey(repository)) {
	keyText.setEnabled(true);
	} else {
	keyText.setEnabled(false);
	}
	}

	if (queryPages[pageIndex] != null) {
	GridData data = (GridData) queryPages[pageIndex].getLayoutData();
	if (data == null) {
	data = new GridData();
	}
	data.exclude = false;
	queryPages[pageIndex].setLayoutData(data);
	queryPages[pageIndex].setVisible(true);
	ITaskSearchPage page = (ITaskSearchPage) queryPages[pageIndex].getData(PAGE_KEY);
	page.setVisible(true);
	}

	currentPageIndex = pageIndex;
	fParentComposite.getParent().layout(true, true);
	updatePageEnablement();

	}

	private ITaskSearchPage getSearchPage(AbstractRepositoryConnectorUi connectorUi) {
	if (connectorUi.hasSearchPage()) {
	return connectorUi.getSearchPage(repository, null);
	}
	return null;
	}

	@Override
	public void setVisible(boolean visible) {
	if (firstView) {
	firstView = false;
	getControl().setLayoutData(new GridData(GridData.FILL, GridData.FILL, true, true));

	List<TaskRepository> repositories = TasksUi.getRepositoryManager().getAllRepositories();
	List<TaskRepository> searchableRepositories = new ArrayList<TaskRepository>(repositories.size());
	for (TaskRepository repository : repositories) {
	AbstractRepositoryConnectorUi connectorUi = TasksUiPlugin.getConnectorUi(repository.getConnectorKind());
	AbstractRepositoryConnector connector = TasksUi.getRepositoryManager()
	.getRepositoryConnector(repository.getConnectorKind());
	if ((connectorUi != null && connectorUi.hasSearchPage() && !repository.isOffline())
	\|\| connector.canCreateTaskFromKey(repository)) {
	searchableRepositories.add(repository);
	}
	}

	Collections.sort(searchableRepositories, new TaskRepositoryComparator());

	String[] repositoryUrls = new String[searchableRepositories.size()];
	int i = 0;
	int indexToSelect = 0;
	for (TaskRepository currRepsitory : searchableRepositories) {
	if (repository != null && repository.equals(currRepsitory)) {
	indexToSelect = i;
	}
	repositoryUrls[i] = currRepsitory.getRepositoryUrl();
	i++;
	}

	IDialogSettings settings = getDialogSettings();
	if (repositoryCombo != null) {
	for (int x = 0; x < searchableRepositories.size(); x++) {
	repositoryCombo.add(searchableRepositories.get(x).getRepositoryLabel());
	repositoryCombo.setData(searchableRepositories.get(x).getRepositoryLabel(),
	searchableRepositories.get(x));
	}
	if (searchableRepositories.isEmpty()) {
	if (repositories.isEmpty()) {
	MessageDialog.openInformation(Display.getCurrent().getActiveShell(),
	Messages.TaskSearchPage_Repository_Search,
	Messages.TaskSearchPage_no_available_repositories);
	} else {
	MessageDialog.openInformation(Display.getCurrent().getActiveShell(),
	Messages.TaskSearchPage_Repository_Search,
	Messages.TaskSearchPage_no_searchable_repositories);
	}
	} else {
	String selectRepo = settings.get(STORE_REPO_ID);
	if (selectRepo != null && repositoryCombo.indexOf(selectRepo) > -1) {
	repositoryCombo.select(repositoryCombo.indexOf(selectRepo));
	repository = (TaskRepository) repositoryCombo.getData(selectRepo);
	if (repository == null) {
	// TODO: Display no repository error
	}
	} else {
	repositoryCombo.select(indexToSelect);
	}

	// TODO: Create one page per connector and repopulate based on repository
	queryPages = new Control[repositoryUrls.length];
	displayQueryPage(repositoryCombo.getSelectionIndex());
	// updateAttributesFromRepository(repositoryCombo.getText(),
	// null, false);
	}
	}
	}

	if (queryPages == null) {
	pageContainer.setPerformActionEnabled(false);
	}

	super.setVisible(visible);

	setDefaultValuesAndFocus();
	}

	private void setDefaultValuesAndFocus() {
	IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
	if (window != null) {
	IWorkbenchPage page = window.getActivePage();
	if (page != null) {
	String repositoryUrl = null;
	IWorkbenchPart part = page.getActivePart();
	if (part instanceof ISearchResultViewPart) {
	ISearchQuery[] queries = NewSearchUI.getQueries();
	if (queries.length > 0) {
	if (queries[0] instanceof SearchHitCollector) {
	repositoryUrl = ((SearchHitCollector) queries[0]).getRepositoryQuery().getRepositoryUrl();
	}
	}
	}
	// if (repositoryUrl == null) {
	// IEditorPart editor = page.getActiveEditor();
	// if (editor instanceof TaskEditor) {
	// repositoryUrl = ((TaskEditor) editor).getTaskEditorInput().getTask().getRepositoryUrl();
	// }
	// }
	// if (repositoryUrl == null) {
	// TaskListView taskListView = TaskListView.getFromActivePerspective();
	// if (taskListView != null) {
	// AbstractTask selectedTask = taskListView.getSelectedTask();
	// if (selectedTask != null) {
	// repositoryUrl = selectedTask.getRepositoryUrl();
	// }
	// }
	// }
	if (repositoryUrl != null) {
	TaskRepository repository = TasksUiPlugin.getRepositoryManager().getRepository(repositoryUrl);
	if (repository != null) {
	int index = 0;
	for (String repositoryLabel : repositoryCombo.getItems()) {
	if (repositoryLabel.equals(repository.getRepositoryLabel())) {
	repositoryCombo.select(index);
	}
	index++;
	}
	displayQueryPage(repositoryCombo.getSelectionIndex());
	}
	}
	}
	}

	if (keyText.getText() != null && keyText.getText().trim().length() > 0) {
	keyText.setFocus();
	keyText.setSelection(0, keyText.getText().length());
	} else {
	Clipboard clipboard = new Clipboard(Display.getDefault());
	TextTransfer transfer = TextTransfer.getInstance();
	String contents = (String) clipboard.getContents(transfer);
	if (contents != null) {
	if (isTaskKeyCandidate(contents.trim())) {
	keyText.setText(contents.trim());
	keyText.setFocus();
	keyText.setSelection(0, keyText.getText().length());
	}
	}
	}
	updatePageEnablement();
	}

	private boolean isTaskKeyCandidate(String contents) {
	boolean looksLikeKey = false;
	try {
	Integer.parseInt(contents);
	looksLikeKey = true;
	} catch (NumberFormatException nfe) {
	}
	if (!looksLikeKey) {
	try {
	Integer.parseInt(contents.substring(contents.lastIndexOf('-')));
	looksLikeKey = true;
	} catch (Exception e) {
	}
	}
	return looksLikeKey;
	}

	public IDialogSettings getDialogSettings() {
	IDialogSettings settings = TasksUiPlugin.getDefault().getDialogSettings();
	fDialogSettings = settings.getSection(PAGE_NAME);
	if (fDialogSettings == null) {
	fDialogSettings = settings.addNewSection(PAGE_NAME);
	}
	return fDialogSettings;
	}

	private void saveDialogSettings() {
	IDialogSettings settings = getDialogSettings();
	settings.put(STORE_REPO_ID, repositoryCombo.getText());
	}

	@Override
	public void dispose() {
	if (queryPages != null) {
	for (Control control : queryPages) {
	if (control != null) {
	ITaskSearchPage page = (ITaskSearchPage) control.getData(PAGE_KEY);
	page.dispose();
	}
	}
	}
	super.dispose();
	}

	private class DeadSearchPage extends AbstractRepositoryQueryPage {

	public DeadSearchPage(TaskRepository rep, Status status) {
	super("Search page error", rep); //$NON-NLS-1$
	}

	public void createControl(Composite parent) {
	Hyperlink hyperlink = new Hyperlink(parent, SWT.NONE);
	hyperlink.setText(Messages.TaskSearchPage_ERROR_Unable_to_present_query_page);
	hyperlink.setUnderlined(true);
	hyperlink.addHyperlinkListener(new HyperlinkAdapter() {
	@Override
	public void linkActivated(HyperlinkEvent e) {
	TaskSearchPage.this.getControl().getShell().close();
	TasksUiUtil.openEditRepositoryWizard(getTaskRepository());
	// TODO: Re-construct this page with new
	// repository data
	}

	});

	GridDataFactory.fillDefaults().grab(true, true).applyTo(hyperlink);
	setControl(hyperlink);
	}

	@Override
	public IRepositoryQuery getQuery() {
	return null;
	}

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

	@Override
	public void setVisible(boolean visible) {
	super.setVisible(visible);
	if (visible) {
	getSearchContainer().setPerformActionEnabled(false);
	}
	}

	@Override
	public String getQueryTitle() {
	return null;
	}

	@Override
	public void applyTo(IRepositoryQuery query) {
	// ignore
	}

	}

	private class NoSearchPage extends AbstractRepositoryQueryPage {

	public NoSearchPage(TaskRepository rep) {
	super("No search page", rep); //$NON-NLS-1$
	}

	public void createControl(Composite parent) {
	Composite composite = new Composite(parent, SWT.NONE);
	composite.setLayout(new GridLayout());
	Dialog.applyDialogFont(composite);
	setControl(composite);
	}

	@Override
	public IRepositoryQuery getQuery() {
	return null;
	}

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

	@Override
	public void setVisible(boolean visible) {
	super.setVisible(visible);
	if (visible) {
	getSearchContainer().setPerformActionEnabled(false);
	}
	}

	@Override
	public String getQueryTitle() {
	return null;
	}

	@Override
	public void applyTo(IRepositoryQuery query) {
	// ignore
	}

	}
	}