org.eclipse.help.ui/src/org/eclipse/help/ui/internal/views/SearchPart.java - platform/eclipse.platform.ua - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation 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:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.help.ui.internal.views;

 import java.util.*;
 import java.util.ArrayList;

 import org.eclipse.core.runtime.*;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.jobs.*;
 import org.eclipse.help.internal.base.BaseHelpSystem;
 import org.eclipse.help.internal.search.federated.*;
 import org.eclipse.help.search.*;
 import org.eclipse.help.ui.internal.*;
 import org.eclipse.jface.action.*;
 import org.eclipse.jface.preference.*;
 import org.eclipse.osgi.util.NLS;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.*;
 import org.eclipse.swt.widgets.*;
 import org.eclipse.ui.actions.ActionFactory;
 import org.eclipse.ui.forms.*;
 import org.eclipse.ui.forms.events.*;
 import org.eclipse.ui.forms.events.HyperlinkAdapter;
 import org.eclipse.ui.forms.widgets.*;

 public class SearchPart extends AbstractFormPart implements IHelpPart,
 		IHelpUIConstants {
 	private ReusableHelpPart parent;

 	protected static java.util.List previousSearchQueryData = new java.util.ArrayList(
 			20);

 	private static final String HREF_TOGGLE = "__toggle__"; //$NON-NLS-1$

 	private static final String HREF_SEARCH_HELP = "/org.eclipse.platform.doc.user/tasks/tsearch.htm"; //$NON-NLS-1$

 	private String id;

 	private Composite container;

 	private FormText searchWordText;

 	private boolean searchWordTextExpanded = false;

 	private ComboPart searchWordCombo;

 	private Section scopeSection;

 	private Button goButton;

 	private Hyperlink scopeSetLink;

 	private Hyperlink advancedLink;

 	private ScopeSetManager scopeSetManager;

 	private EngineDescriptorManager descManager;

 	private JobListener jobListener;

 	private class JobListener implements IJobChangeListener, Runnable {
 		private boolean searchInProgress = false;

 		public void aboutToRun(IJobChangeEvent event) {
 		}

 		public void awake(IJobChangeEvent event) {
 		}

 		public void done(IJobChangeEvent event) {
 			if (event.getJob().belongsTo(FederatedSearchJob.FAMILY)) {
 				Job[] searchJobs = Platform.getJobManager().find(
 						FederatedSearchJob.FAMILY);
 				if (searchJobs.length == 0) {
 					// search finished
 					searchInProgress = false;
 					container.getDisplay().asyncExec(this);
 					SearchResultsPart results = (SearchResultsPart) parent
 					.findPart(IHelpUIConstants.HV_FSEARCH_RESULT);
 					results.completed();
 				}
 			}
 		}

 		public void running(IJobChangeEvent event) {
 		}

 		public void scheduled(IJobChangeEvent event) {
 			if (!searchInProgress
 					&& event.getJob().belongsTo(FederatedSearchJob.FAMILY)) {
 				searchInProgress = true;
 				container.getDisplay().asyncExec(this);
 			}
 		}

 		public void sleeping(IJobChangeEvent event) {
 		}

 		public void run() {
 			searchWordCombo.getControl().setEnabled(!searchInProgress);
 			if (!searchInProgress)
 				goButton.setEnabled(true);
 			if (searchInProgress)
 				goButton.setText(Messages.SearchPart_stop);
 			else
 				goButton.setText(Messages.SearchPart_go);
 			goButton.getParent().layout();
 		}
 	}

 	/**
 	 * @param parent
 	 * @param toolkit
 	 * @param style
 	 */
 	public SearchPart(final Composite parent, FormToolkit toolkit) {
 		container = toolkit.createComposite(parent);
 		TableWrapLayout layout = new TableWrapLayout();
 		layout.numColumns = 2;
 		container.setLayout(layout);
 		// Search Expression
 		searchWordText = toolkit.createFormText(container, true);
 		searchWordText.addHyperlinkListener(new HyperlinkAdapter() {
 			public void linkActivated(HyperlinkEvent e) {
 				Object href = e.getHref();
 				if (href.equals(HREF_TOGGLE)) {
 					parent.getDisplay().asyncExec(new Runnable() {
 						public void run() {
 							toggleSearchWordText();
 						}
 					});
 				} else
 					SearchPart.this.parent.showURL(HREF_SEARCH_HELP, true);
 			}
 		});
 		searchWordText.setImage(IHelpUIConstants.IMAGE_HELP, HelpUIResources
 				.getImage(IHelpUIConstants.IMAGE_HELP));
 		updateSearchWordText();
 		TableWrapData td = new TableWrapData();
 		td.colspan = 2;
 		searchWordText.setLayoutData(td);
 		// Pattern combo
 		searchWordCombo = new ComboPart(container, toolkit, toolkit.getBorderStyle());
 		td = new TableWrapData(TableWrapData.FILL_GRAB);
 		td.maxWidth = 100;
 		td.valign = TableWrapData.MIDDLE;
 		searchWordCombo.getControl().setLayoutData(td);
 		searchWordCombo.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				if (searchWordCombo.getSelectionIndex() < 0)
 					return;
 				int index = previousSearchQueryData.size() - 1
 						- searchWordCombo.getSelectionIndex();
 				/*
 				 * searchQueryData = (SearchQueryData) previousSearchQueryData
 				 * .get(index);
 				 * searchWordCombo.setText(searchQueryData.getSearchWord());
 				 * all.setSelection(!searchQueryData.isBookFiltering());
 				 * selected.setSelection(searchQueryData.isBookFiltering());
 				 * includeDisabledActivities.setSelection(!searchQueryData
 				 * .isActivityFiltering()); displaySelectedBooks(); //
 				 * headingsButton.setSelection(searchOperation.getQueryData().isFieldsSearch());
 				 *
 				 */
 			}
 		});
 		goButton = toolkit.createButton(container, Messages.SearchPart_go, SWT.PUSH);
 		goButton.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				handleButtonPressed();
 			}
 		});
 		goButton.setEnabled(false);
 		searchWordCombo.addModifyListener(new ModifyListener() {
 			public void modifyText(ModifyEvent e) {
 				goButton.setEnabled(searchWordCombo.getText().length() > 0);
 			}
 		});
 		searchWordCombo.addKeyListener(new KeyAdapter() {
 			public void keyReleased(KeyEvent e) {
 				if (e.character == '\r') {
 					if (goButton.isEnabled())
 						doSearch(searchWordCombo.getText());
 				}
 			}
 		});
 		scopeSection = toolkit.createSection(container, Section.TWISTIE
 				| Section.COMPACT | Section.LEFT_TEXT_CLIENT_ALIGNMENT);
 		scopeSection.setText(Messages.limit_to);
 		td = new TableWrapData();
 		td.colspan = 2;
 		td.align = TableWrapData.FILL;
 		scopeSection.setLayoutData(td);
 		Composite filteringGroup = toolkit.createComposite(scopeSection);
 		scopeSection.setClient(filteringGroup);
 		createScopeSet(scopeSection, toolkit);
 		TableWrapLayout flayout = new TableWrapLayout();
 		flayout.numColumns = 2;
 		filteringGroup.setLayout(flayout);

 		toolkit.paintBordersFor(filteringGroup);
 		toolkit.paintBordersFor(container);
 		loadEngines(filteringGroup, toolkit);
 		createAdvancedLink(filteringGroup, toolkit);
 		jobListener = new JobListener();
 		Platform.getJobManager().addJobChangeListener(jobListener);
 	}

 	private void createAdvancedLink(Composite parent, FormToolkit toolkit) {
 		advancedLink = toolkit
 				.createHyperlink(parent, Messages.FederatedSearchPart_advanced, SWT.NULL); //$NON-NLS-1$
 		advancedLink.addHyperlinkListener(new HyperlinkAdapter() {
 			public void linkActivated(HyperlinkEvent e) {
 				doAdvanced();
 			}
 		});
 		TableWrapData td = new TableWrapData();
 		td.colspan = 2;
 		advancedLink.setLayoutData(td);
 	}

 	private void createScopeSet(Section section, FormToolkit toolkit) {
 		scopeSetManager = new ScopeSetManager();
 		scopeSetLink = toolkit.createHyperlink(section, null, SWT.NULL);
 		scopeSetLink.addHyperlinkListener(new HyperlinkAdapter() {
 			public void linkActivated(HyperlinkEvent e) {
 				doChangeScopeSet();
 			}
 		});
 		scopeSetLink.setToolTipText(Messages.FederatedSearchPart_changeScopeSet); //$NON-NLS-1$
 		section.setTextClient(scopeSetLink);
 		ScopeSet active = scopeSetManager.getActiveSet();
 		setActiveScopeSet(active);
 	}

 	private void toggleSearchWordText() {
 		searchWordTextExpanded = !searchWordTextExpanded;
 		updateSearchWordText();
 		SearchPart.this.parent.reflow();
 		searchWordText.setFocus();
 	}

 	private void updateSearchWordText() {
 		StringBuffer buff = new StringBuffer();
 		buff.append("<form>"); //$NON-NLS-1$
 		buff.append("<p>"); //$NON-NLS-1$
 		buff.append(Messages.expression);
 		if (searchWordTextExpanded) {
 			buff.append(" <a href=\""); //$NON-NLS-1$
 			buff.append(HREF_TOGGLE);
 			buff.append("\" alt=\""); //$NON-NLS-1$
 			buff.append(Messages.SearchPart_collapse);
 			buff.append("\">&lt;&lt;</a>"); //$NON-NLS-1$
 			buff.append("</p><p>"); //$NON-NLS-1$
 			buff.append(Messages.expression_label);
 			buff.append("</p><p>"); //$NON-NLS-1$
 			buff.append("<img href=\""); //$NON-NLS-1$
 			buff.append(IHelpUIConstants.IMAGE_HELP);
 			buff.append("\"/> "); //$NON-NLS-1$
 			buff.append("<a href=\""); //$NON-NLS-1$
 			buff.append(HREF_SEARCH_HELP);
 			buff.append(Messages.SearchPart_learnMore);
 			buff.append("</a>"); //$NON-NLS-1$
 		} else {
 			buff.append(" <a href=\""); //$NON-NLS-1$
 			buff.append(HREF_TOGGLE);
 			buff.append("\" alt=\""); //$NON-NLS-1$
 			buff.append(Messages.SearchPart_expand);
 			buff.append("\">&gt;&gt;</a>"); //$NON-NLS-1$
 		}
 		buff.append("</p>"); //$NON-NLS-1$
 		buff.append("</form>"); //$NON-NLS-1$
 		searchWordText.setText(buff.toString(), true, false);
 	}

 	private void setActiveScopeSet(ScopeSet set) {
 		scopeSetLink.setText(set.getName());
 		scopeSetManager.setActiveSet(set);
 		updateMasters(set);
 		scopeSection.layout();
 		if (parent != null)
 			parent.reflow();
 	}

 	private void updateMasters(ScopeSet set) {
 		Control[] children = ((Composite) scopeSection.getClient())
 				.getChildren();
 		for (int i = 0; i < children.length; i++) {
 			Control child = children[i];
 			if (child instanceof Button) {
 				Button master = (Button) child;
 				Object data = master.getData();
 				if (data != null && data instanceof EngineDescriptor) {
 					EngineDescriptor ed = (EngineDescriptor) data;
 					master.setSelection(set.getEngineEnabled(ed));
 				}
 			}
 		}
 	}

 	private void loadEngines(final Composite container,
 			final FormToolkit toolkit) {
 		descManager = new EngineDescriptorManager();
 		EngineDescriptor[] descriptors = descManager.getDescriptors();
 		for (int i = 0; i < descriptors.length; i++) {
 			EngineDescriptor desc = descriptors[i];
 			loadEngine(desc, container, toolkit);
 		}
 		descManager.addObserver(new Observer() {
 			public void update(Observable o, Object arg) {
 				EngineDescriptorManager.DescriptorEvent event = (EngineDescriptorManager.DescriptorEvent) arg;
 				int kind = event.getKind();
 				EngineDescriptor desc = event.getDescriptor();
 				if (kind == IHelpUIConstants.ADD) {
 					advancedLink.dispose();
 					loadEngine(desc, container, toolkit);
 					createAdvancedLink(container, toolkit);
 					parent.reflow();
 				} else if (kind == IHelpUIConstants.REMOVE) {
 					removeEngine(desc);
 				} else {
 					updateEngine(desc);
 				}
 			}
 		});
 		updateMasters(scopeSetManager.getActiveSet());
 	}

 	private EngineDescriptor loadEngine(final EngineDescriptor edesc,
 			Composite container, FormToolkit toolkit) {
 		Label ilabel = toolkit.createLabel(container, null);
 		ilabel.setImage(edesc.getIconImage());
 		ilabel.setData(edesc);
 		final Button master = toolkit.createButton(container, edesc.getLabel(),
 				SWT.CHECK);
 		master.setData(edesc);
 		master.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				scopeSetManager.getActiveSet().setEngineEnabled(edesc,
 						master.getSelection());
 			}
 		});
 		String desc = edesc.getDescription();
 		if (desc != null) {
 			Label spacer = toolkit.createLabel(container, null);
             spacer.setData(edesc);
 			Label dlabel = toolkit.createLabel(container, desc, SWT.WRAP);
 			dlabel
 					.setForeground(toolkit.getColors().getColor(
 							FormColors.TITLE));
 			dlabel.setLayoutData(new TableWrapData(TableWrapData.FILL_GRAB));
 			dlabel.setMenu(container.getMenu());
 			dlabel.setData(edesc);
 		}
 		return edesc;
 	}

 	private void removeEngine(EngineDescriptor desc) {
 		boolean reflowNeeded = false;
 		Control[] children = ((Composite)scopeSection.getClient()).getChildren();
 		for (int i = 0; i < children.length; i++) {
 			Control child = children[i];
 			EngineDescriptor ed = (EngineDescriptor) child.getData();
 			if (ed==desc) {
                 child.setMenu(null);
                 child.dispose();
                 reflowNeeded=true;
             }
 	    }
 		if (reflowNeeded)
 			parent.reflow();
 	}

 	private void updateEngine(EngineDescriptor desc) {
 		Control[] children = ((Composite)scopeSection.getClient()).getChildren();
 		boolean reflowNeeded = false;
 		for (int i = 0; i < children.length; i++) {
 			Control child = children[i];
 			EngineDescriptor ed = (EngineDescriptor) child.getData();
 			if (ed == desc) {
 				Button b = (Button) children[i + 1];
 				b.setText(desc.getLabel());
 				Label d = (Label) children[i + 3];
 				d.setText(desc.getDescription());
 				d.getParent().layout();
 				reflowNeeded = true;
 				break;
 			}
 		}
 		if (reflowNeeded)
 			parent.reflow();
 	}

 	public void startSearch(String text) {
 		searchWordCombo.setText(text);
 		doSearch(text);
 	}

 	private void handleButtonPressed() {
 		if (searchWordCombo.getControl().isEnabled())
 			doSearch(searchWordCombo.getText());
 		else {
 			goButton.setEnabled(false);
 			stop();
 		}
 	}

 	private void doSearch(String text) {
 		ScopeSet set = scopeSetManager.getActiveSet();
 		ArrayList entries = new ArrayList();
 		final SearchResultsPart results = (SearchResultsPart) parent
 				.findPart(IHelpUIConstants.HV_FSEARCH_RESULT);
 		ArrayList eds = new ArrayList();
 		EngineDescriptor[] engineDescriptors = descManager.getDescriptors();
 		for (int i = 0; i < engineDescriptors.length; i++) {
 			final EngineDescriptor ed = engineDescriptors[i];
 			if (set.getEngineEnabled(ed) && ed.getEngine() != null) {
 				ISearchScope scope = ed.createSearchScope(set
 						.getPreferenceStore());
 				FederatedSearchEntry entry = new FederatedSearchEntry(ed
 						.getId(), ed.getLabel(), scope, ed.getEngine(),
 						new ISearchEngineResultCollector() {
 							public void add(ISearchEngineResult searchResult) {
 								results.add(ed, searchResult);
 							}

 							public void add(ISearchEngineResult[] searchResults) {
 								results.add(ed, searchResults);
 							}
 							public void error(IStatus status) {
 								results.error(ed, status);
 							}
 						});
 				entries.add(entry);
 				eds.add(ed);
 			}
 		}
 		if (entries.size() == 0)
 			return;
 		FederatedSearchEntry[] array = (FederatedSearchEntry[]) entries
 				.toArray(new FederatedSearchEntry[entries.size()]);
 		if (scopeSection.isExpanded()) {
 			scopeSection.setExpanded(false);
 			parent.reflow();
 		}
 		results.clearResults();
 		results.startNewSearch(text, eds);
 		BaseHelpSystem.getSearchManager().search(text, array);
 	}

 	private void doAdvanced() {
 		ScopeSet set = scopeSetManager.getActiveSet();
 		PreferenceManager manager = new ScopePreferenceManager(descManager, set);
 		PreferenceDialog dialog = new ScopePreferenceDialog(container
 				.getShell(), manager, descManager);
 		dialog.setPreferenceStore(set.getPreferenceStore());
 		dialog.create();
 		dialog.getShell().setText(NLS.bind("ScopePreferenceDialog.wtitle", set.getName())); //$NON-NLS-1$
 		dialog.open();
 		updateMasters(set);
 	}

 	private void doChangeScopeSet() {
 		ScopeSetDialog dialog = new ScopeSetDialog(container.getShell(),
 				scopeSetManager, descManager);
 		dialog.setInput(scopeSetManager);
 		dialog.create();
 		dialog.getShell().setText(Messages.ScopeSetDialog_wtitle);
 		if (dialog.open() == ScopeSetDialog.OK) {
 			ScopeSet set = dialog.getActiveSet();
 			if (set != null)
 				setActiveScopeSet(set);
 		}
 	}

 	public void dispose() {
 		ScopeSet activeSet = scopeSetManager.getActiveSet();
 		if (activeSet != null)
 			activeSet.save();
 		Platform.getJobManager().removeJobChangeListener(jobListener);
 		stop();
 		super.dispose();
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.help.ui.internal.views.IHelpPart#getControl()
 	 */
 	public Control getControl() {
 		return container;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.help.ui.internal.views.IHelpPart#init(org.eclipse.help.ui.internal.views.NewReusableHelpPart)
 	 */
 	public void init(ReusableHelpPart parent, String id) {
 		this.parent = parent;
 		this.id = id;
 	}

 	public String getId() {
 		return id;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.help.ui.internal.views.IHelpPart#setVisible(boolean)
 	 */
 	public void setVisible(boolean visible) {
 		getControl().setVisible(visible);
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.help.ui.internal.views.IHelpPart#fillContextMenu(org.eclipse.jface.action.IMenuManager)
 	 */
 	public boolean fillContextMenu(IMenuManager manager) {
 		return parent.fillFormContextMenu(searchWordText, manager);
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.help.ui.internal.views.IHelpPart#hasFocusControl(org.eclipse.swt.widgets.Control)
 	 */
 	public boolean hasFocusControl(Control control) {
 		return control == searchWordText || control == searchWordCombo.getControl()
 				|| scopeSection.getClient() == control;
 	}

 	public void setFocus() {
 		searchWordCombo.getControl().setFocus();
 	}

 	public IAction getGlobalAction(String id) {
 		if (id.equals(ActionFactory.COPY.getId()))
 			return parent.getCopyAction();
 		return null;
 	}

 	public void stop() {
 		SearchResultsPart results = (SearchResultsPart) parent
 		.findPart(IHelpUIConstants.HV_FSEARCH_RESULT);
 		results.canceling();
 		Platform.getJobManager().cancel(FederatedSearchJob.FAMILY);
 	}

 	public void toggleRoleFilter() {
 	}

 	public void refilter() {
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2005 IBM Corporation 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:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.help.ui.internal.views;

	import java.util.*;
	import java.util.ArrayList;

	import org.eclipse.core.runtime.*;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.core.runtime.jobs.*;
	import org.eclipse.help.internal.base.BaseHelpSystem;
	import org.eclipse.help.internal.search.federated.*;
	import org.eclipse.help.search.*;
	import org.eclipse.help.ui.internal.*;
	import org.eclipse.jface.action.*;
	import org.eclipse.jface.preference.*;
	import org.eclipse.osgi.util.NLS;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.*;
	import org.eclipse.swt.widgets.*;
	import org.eclipse.ui.actions.ActionFactory;
	import org.eclipse.ui.forms.*;
	import org.eclipse.ui.forms.events.*;
	import org.eclipse.ui.forms.events.HyperlinkAdapter;
	import org.eclipse.ui.forms.widgets.*;

	public class SearchPart extends AbstractFormPart implements IHelpPart,
	IHelpUIConstants {
	private ReusableHelpPart parent;

	protected static java.util.List previousSearchQueryData = new java.util.ArrayList(
	20);

	private static final String HREF_TOGGLE = "__toggle__"; //$NON-NLS-1$

	private static final String HREF_SEARCH_HELP = "/org.eclipse.platform.doc.user/tasks/tsearch.htm"; //$NON-NLS-1$

	private String id;

	private Composite container;

	private FormText searchWordText;

	private boolean searchWordTextExpanded = false;

	private ComboPart searchWordCombo;

	private Section scopeSection;

	private Button goButton;

	private Hyperlink scopeSetLink;

	private Hyperlink advancedLink;

	private ScopeSetManager scopeSetManager;

	private EngineDescriptorManager descManager;

	private JobListener jobListener;

	private class JobListener implements IJobChangeListener, Runnable {
	private boolean searchInProgress = false;

	public void aboutToRun(IJobChangeEvent event) {
	}

	public void awake(IJobChangeEvent event) {
	}

	public void done(IJobChangeEvent event) {
	if (event.getJob().belongsTo(FederatedSearchJob.FAMILY)) {
	Job[] searchJobs = Platform.getJobManager().find(
	FederatedSearchJob.FAMILY);
	if (searchJobs.length == 0) {
	// search finished
	searchInProgress = false;
	container.getDisplay().asyncExec(this);
	SearchResultsPart results = (SearchResultsPart) parent
	.findPart(IHelpUIConstants.HV_FSEARCH_RESULT);
	results.completed();
	}
	}
	}

	public void running(IJobChangeEvent event) {
	}

	public void scheduled(IJobChangeEvent event) {
	if (!searchInProgress
	&& event.getJob().belongsTo(FederatedSearchJob.FAMILY)) {
	searchInProgress = true;
	container.getDisplay().asyncExec(this);
	}
	}

	public void sleeping(IJobChangeEvent event) {
	}

	public void run() {
	searchWordCombo.getControl().setEnabled(!searchInProgress);
	if (!searchInProgress)
	goButton.setEnabled(true);
	if (searchInProgress)
	goButton.setText(Messages.SearchPart_stop);
	else
	goButton.setText(Messages.SearchPart_go);
	goButton.getParent().layout();
	}
	}

	/**
	* @param parent
	* @param toolkit
	* @param style
	*/
	public SearchPart(final Composite parent, FormToolkit toolkit) {
	container = toolkit.createComposite(parent);
	TableWrapLayout layout = new TableWrapLayout();
	layout.numColumns = 2;
	container.setLayout(layout);
	// Search Expression
	searchWordText = toolkit.createFormText(container, true);
	searchWordText.addHyperlinkListener(new HyperlinkAdapter() {
	public void linkActivated(HyperlinkEvent e) {
	Object href = e.getHref();
	if (href.equals(HREF_TOGGLE)) {
	parent.getDisplay().asyncExec(new Runnable() {
	public void run() {
	toggleSearchWordText();
	}
	});
	} else
	SearchPart.this.parent.showURL(HREF_SEARCH_HELP, true);
	}
	});
	searchWordText.setImage(IHelpUIConstants.IMAGE_HELP, HelpUIResources
	.getImage(IHelpUIConstants.IMAGE_HELP));
	updateSearchWordText();
	TableWrapData td = new TableWrapData();
	td.colspan = 2;
	searchWordText.setLayoutData(td);
	// Pattern combo
	searchWordCombo = new ComboPart(container, toolkit, toolkit.getBorderStyle());
	td = new TableWrapData(TableWrapData.FILL_GRAB);
	td.maxWidth = 100;
	td.valign = TableWrapData.MIDDLE;
	searchWordCombo.getControl().setLayoutData(td);
	searchWordCombo.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	if (searchWordCombo.getSelectionIndex() < 0)
	return;
	int index = previousSearchQueryData.size() - 1
	- searchWordCombo.getSelectionIndex();
	/*
	* searchQueryData = (SearchQueryData) previousSearchQueryData
	* .get(index);
	* searchWordCombo.setText(searchQueryData.getSearchWord());
	* all.setSelection(!searchQueryData.isBookFiltering());
	* selected.setSelection(searchQueryData.isBookFiltering());
	* includeDisabledActivities.setSelection(!searchQueryData
	* .isActivityFiltering()); displaySelectedBooks(); //
	* headingsButton.setSelection(searchOperation.getQueryData().isFieldsSearch());
	*
	*/
	}
	});
	goButton = toolkit.createButton(container, Messages.SearchPart_go, SWT.PUSH);
	goButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	handleButtonPressed();
	}
	});
	goButton.setEnabled(false);
	searchWordCombo.addModifyListener(new ModifyListener() {
	public void modifyText(ModifyEvent e) {
	goButton.setEnabled(searchWordCombo.getText().length() > 0);
	}
	});
	searchWordCombo.addKeyListener(new KeyAdapter() {
	public void keyReleased(KeyEvent e) {
	if (e.character == '\r') {
	if (goButton.isEnabled())
	doSearch(searchWordCombo.getText());
	}
	}
	});
	scopeSection = toolkit.createSection(container, Section.TWISTIE
	\| Section.COMPACT \| Section.LEFT_TEXT_CLIENT_ALIGNMENT);
	scopeSection.setText(Messages.limit_to);
	td = new TableWrapData();
	td.colspan = 2;
	td.align = TableWrapData.FILL;
	scopeSection.setLayoutData(td);
	Composite filteringGroup = toolkit.createComposite(scopeSection);
	scopeSection.setClient(filteringGroup);
	createScopeSet(scopeSection, toolkit);
	TableWrapLayout flayout = new TableWrapLayout();
	flayout.numColumns = 2;
	filteringGroup.setLayout(flayout);

	toolkit.paintBordersFor(filteringGroup);
	toolkit.paintBordersFor(container);
	loadEngines(filteringGroup, toolkit);
	createAdvancedLink(filteringGroup, toolkit);
	jobListener = new JobListener();
	Platform.getJobManager().addJobChangeListener(jobListener);
	}

	private void createAdvancedLink(Composite parent, FormToolkit toolkit) {
	advancedLink = toolkit
	.createHyperlink(parent, Messages.FederatedSearchPart_advanced, SWT.NULL); //$NON-NLS-1$
	advancedLink.addHyperlinkListener(new HyperlinkAdapter() {
	public void linkActivated(HyperlinkEvent e) {
	doAdvanced();
	}
	});
	TableWrapData td = new TableWrapData();
	td.colspan = 2;
	advancedLink.setLayoutData(td);
	}

	private void createScopeSet(Section section, FormToolkit toolkit) {
	scopeSetManager = new ScopeSetManager();
	scopeSetLink = toolkit.createHyperlink(section, null, SWT.NULL);
	scopeSetLink.addHyperlinkListener(new HyperlinkAdapter() {
	public void linkActivated(HyperlinkEvent e) {
	doChangeScopeSet();
	}
	});
	scopeSetLink.setToolTipText(Messages.FederatedSearchPart_changeScopeSet); //$NON-NLS-1$
	section.setTextClient(scopeSetLink);
	ScopeSet active = scopeSetManager.getActiveSet();
	setActiveScopeSet(active);
	}

	private void toggleSearchWordText() {
	searchWordTextExpanded = !searchWordTextExpanded;
	updateSearchWordText();
	SearchPart.this.parent.reflow();
	searchWordText.setFocus();
	}

	private void updateSearchWordText() {
	StringBuffer buff = new StringBuffer();
	buff.append("<form>"); //$NON-NLS-1$
	buff.append("<p>"); //$NON-NLS-1$
	buff.append(Messages.expression);
	if (searchWordTextExpanded) {
	buff.append(" <a href=\""); //$NON-NLS-1$
	buff.append(HREF_TOGGLE);
	buff.append("\" alt=\""); //$NON-NLS-1$
	buff.append(Messages.SearchPart_collapse);
	buff.append("\"><<</a>"); //$NON-NLS-1$
	buff.append("</p><p>"); //$NON-NLS-1$
	buff.append(Messages.expression_label);
	buff.append("</p><p>"); //$NON-NLS-1$
	buff.append("<img href=\""); //$NON-NLS-1$
	buff.append(IHelpUIConstants.IMAGE_HELP);
	buff.append("\"/> "); //$NON-NLS-1$
	buff.append("<a href=\""); //$NON-NLS-1$
	buff.append(HREF_SEARCH_HELP);
	buff.append(Messages.SearchPart_learnMore);
	buff.append("</a>"); //$NON-NLS-1$
	} else {
	buff.append(" <a href=\""); //$NON-NLS-1$
	buff.append(HREF_TOGGLE);
	buff.append("\" alt=\""); //$NON-NLS-1$
	buff.append(Messages.SearchPart_expand);
	buff.append("\">>></a>"); //$NON-NLS-1$
	}
	buff.append("</p>"); //$NON-NLS-1$
	buff.append("</form>"); //$NON-NLS-1$
	searchWordText.setText(buff.toString(), true, false);
	}

	private void setActiveScopeSet(ScopeSet set) {
	scopeSetLink.setText(set.getName());
	scopeSetManager.setActiveSet(set);
	updateMasters(set);
	scopeSection.layout();
	if (parent != null)
	parent.reflow();
	}

	private void updateMasters(ScopeSet set) {
	Control[] children = ((Composite) scopeSection.getClient())
	.getChildren();
	for (int i = 0; i < children.length; i++) {
	Control child = children[i];
	if (child instanceof Button) {
	Button master = (Button) child;
	Object data = master.getData();
	if (data != null && data instanceof EngineDescriptor) {
	EngineDescriptor ed = (EngineDescriptor) data;
	master.setSelection(set.getEngineEnabled(ed));
	}
	}
	}
	}

	private void loadEngines(final Composite container,
	final FormToolkit toolkit) {
	descManager = new EngineDescriptorManager();
	EngineDescriptor[] descriptors = descManager.getDescriptors();
	for (int i = 0; i < descriptors.length; i++) {
	EngineDescriptor desc = descriptors[i];
	loadEngine(desc, container, toolkit);
	}
	descManager.addObserver(new Observer() {
	public void update(Observable o, Object arg) {
	EngineDescriptorManager.DescriptorEvent event = (EngineDescriptorManager.DescriptorEvent) arg;
	int kind = event.getKind();
	EngineDescriptor desc = event.getDescriptor();
	if (kind == IHelpUIConstants.ADD) {
	advancedLink.dispose();
	loadEngine(desc, container, toolkit);
	createAdvancedLink(container, toolkit);
	parent.reflow();
	} else if (kind == IHelpUIConstants.REMOVE) {
	removeEngine(desc);
	} else {
	updateEngine(desc);
	}
	}
	});
	updateMasters(scopeSetManager.getActiveSet());
	}

	private EngineDescriptor loadEngine(final EngineDescriptor edesc,
	Composite container, FormToolkit toolkit) {
	Label ilabel = toolkit.createLabel(container, null);
	ilabel.setImage(edesc.getIconImage());
	ilabel.setData(edesc);
	final Button master = toolkit.createButton(container, edesc.getLabel(),
	SWT.CHECK);
	master.setData(edesc);
	master.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	scopeSetManager.getActiveSet().setEngineEnabled(edesc,
	master.getSelection());
	}
	});
	String desc = edesc.getDescription();
	if (desc != null) {
	Label spacer = toolkit.createLabel(container, null);
	spacer.setData(edesc);
	Label dlabel = toolkit.createLabel(container, desc, SWT.WRAP);
	dlabel
	.setForeground(toolkit.getColors().getColor(
	FormColors.TITLE));
	dlabel.setLayoutData(new TableWrapData(TableWrapData.FILL_GRAB));
	dlabel.setMenu(container.getMenu());
	dlabel.setData(edesc);
	}
	return edesc;
	}

	private void removeEngine(EngineDescriptor desc) {
	boolean reflowNeeded = false;
	Control[] children = ((Composite)scopeSection.getClient()).getChildren();
	for (int i = 0; i < children.length; i++) {
	Control child = children[i];
	EngineDescriptor ed = (EngineDescriptor) child.getData();
	if (ed==desc) {
	child.setMenu(null);
	child.dispose();
	reflowNeeded=true;
	}
	}
	if (reflowNeeded)
	parent.reflow();
	}

	private void updateEngine(EngineDescriptor desc) {
	Control[] children = ((Composite)scopeSection.getClient()).getChildren();
	boolean reflowNeeded = false;
	for (int i = 0; i < children.length; i++) {
	Control child = children[i];
	EngineDescriptor ed = (EngineDescriptor) child.getData();
	if (ed == desc) {
	Button b = (Button) children[i + 1];
	b.setText(desc.getLabel());
	Label d = (Label) children[i + 3];
	d.setText(desc.getDescription());
	d.getParent().layout();
	reflowNeeded = true;
	break;
	}
	}
	if (reflowNeeded)
	parent.reflow();
	}

	public void startSearch(String text) {
	searchWordCombo.setText(text);
	doSearch(text);
	}

	private void handleButtonPressed() {
	if (searchWordCombo.getControl().isEnabled())
	doSearch(searchWordCombo.getText());
	else {
	goButton.setEnabled(false);
	stop();
	}
	}

	private void doSearch(String text) {
	ScopeSet set = scopeSetManager.getActiveSet();
	ArrayList entries = new ArrayList();
	final SearchResultsPart results = (SearchResultsPart) parent
	.findPart(IHelpUIConstants.HV_FSEARCH_RESULT);
	ArrayList eds = new ArrayList();
	EngineDescriptor[] engineDescriptors = descManager.getDescriptors();
	for (int i = 0; i < engineDescriptors.length; i++) {
	final EngineDescriptor ed = engineDescriptors[i];
	if (set.getEngineEnabled(ed) && ed.getEngine() != null) {
	ISearchScope scope = ed.createSearchScope(set
	.getPreferenceStore());
	FederatedSearchEntry entry = new FederatedSearchEntry(ed
	.getId(), ed.getLabel(), scope, ed.getEngine(),
	new ISearchEngineResultCollector() {
	public void add(ISearchEngineResult searchResult) {
	results.add(ed, searchResult);
	}

	public void add(ISearchEngineResult[] searchResults) {
	results.add(ed, searchResults);
	}
	public void error(IStatus status) {
	results.error(ed, status);
	}
	});
	entries.add(entry);
	eds.add(ed);
	}
	}
	if (entries.size() == 0)
	return;
	FederatedSearchEntry[] array = (FederatedSearchEntry[]) entries
	.toArray(new FederatedSearchEntry[entries.size()]);
	if (scopeSection.isExpanded()) {
	scopeSection.setExpanded(false);
	parent.reflow();
	}
	results.clearResults();
	results.startNewSearch(text, eds);
	BaseHelpSystem.getSearchManager().search(text, array);
	}

	private void doAdvanced() {
	ScopeSet set = scopeSetManager.getActiveSet();
	PreferenceManager manager = new ScopePreferenceManager(descManager, set);
	PreferenceDialog dialog = new ScopePreferenceDialog(container
	.getShell(), manager, descManager);
	dialog.setPreferenceStore(set.getPreferenceStore());
	dialog.create();
	dialog.getShell().setText(NLS.bind("ScopePreferenceDialog.wtitle", set.getName())); //$NON-NLS-1$
	dialog.open();
	updateMasters(set);
	}

	private void doChangeScopeSet() {
	ScopeSetDialog dialog = new ScopeSetDialog(container.getShell(),
	scopeSetManager, descManager);
	dialog.setInput(scopeSetManager);
	dialog.create();
	dialog.getShell().setText(Messages.ScopeSetDialog_wtitle);
	if (dialog.open() == ScopeSetDialog.OK) {
	ScopeSet set = dialog.getActiveSet();
	if (set != null)
	setActiveScopeSet(set);
	}
	}

	public void dispose() {
	ScopeSet activeSet = scopeSetManager.getActiveSet();
	if (activeSet != null)
	activeSet.save();
	Platform.getJobManager().removeJobChangeListener(jobListener);
	stop();
	super.dispose();
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.help.ui.internal.views.IHelpPart#getControl()
	*/
	public Control getControl() {
	return container;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.help.ui.internal.views.IHelpPart#init(org.eclipse.help.ui.internal.views.NewReusableHelpPart)
	*/
	public void init(ReusableHelpPart parent, String id) {
	this.parent = parent;
	this.id = id;
	}

	public String getId() {
	return id;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.help.ui.internal.views.IHelpPart#setVisible(boolean)
	*/
	public void setVisible(boolean visible) {
	getControl().setVisible(visible);
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.help.ui.internal.views.IHelpPart#fillContextMenu(org.eclipse.jface.action.IMenuManager)
	*/
	public boolean fillContextMenu(IMenuManager manager) {
	return parent.fillFormContextMenu(searchWordText, manager);
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.help.ui.internal.views.IHelpPart#hasFocusControl(org.eclipse.swt.widgets.Control)
	*/
	public boolean hasFocusControl(Control control) {
	return control == searchWordText \|\| control == searchWordCombo.getControl()
	\|\| scopeSection.getClient() == control;
	}

	public void setFocus() {
	searchWordCombo.getControl().setFocus();
	}

	public IAction getGlobalAction(String id) {
	if (id.equals(ActionFactory.COPY.getId()))
	return parent.getCopyAction();
	return null;
	}

	public void stop() {
	SearchResultsPart results = (SearchResultsPart) parent
	.findPart(IHelpUIConstants.HV_FSEARCH_RESULT);
	results.canceling();
	Platform.getJobManager().cancel(FederatedSearchJob.FAMILY);
	}

	public void toggleRoleFilter() {
	}

	public void refilter() {
	}
	}