org.eclipse.help.ui/src/org/eclipse/help/ui/internal/preferences/HelpPreferencePage.java - platform/eclipse.platform.ua - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2016 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.preferences;

 import java.util.Iterator;

 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.preferences.DefaultScope;
 import org.eclipse.core.runtime.preferences.IEclipsePreferences;
 import org.eclipse.core.runtime.preferences.InstanceScope;
 import org.eclipse.help.internal.base.HelpBasePlugin;
 import org.eclipse.help.internal.base.IHelpBaseConstants;
 import org.eclipse.help.internal.browser.BrowserManager;
 import org.eclipse.help.ui.internal.HelpUIPlugin;
 import org.eclipse.help.ui.internal.IHelpUIConstants;
 import org.eclipse.help.ui.internal.Messages;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.preference.IPreferenceNode;
 import org.eclipse.jface.preference.IPreferencePage;
 import org.eclipse.jface.preference.PreferenceManager;
 import org.eclipse.jface.preference.PreferencePage;
 import org.eclipse.swt.SWT;
 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.Group;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.ui.IWorkbench;
 import org.eclipse.ui.IWorkbenchPreferencePage;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.dialogs.PreferenceLinkArea;
 import org.eclipse.ui.preferences.IWorkbenchPreferenceContainer;
 import org.osgi.service.prefs.BackingStoreException;

 /**
  * Preference page for selecting default web browser.
  */
 public class HelpPreferencePage extends PreferencePage implements
 		IWorkbenchPreferencePage {

 	private static final String WBROWSER_PAGE_ID = "org.eclipse.ui.browser.preferencePage";//$NON-NLS-1$

 	private Combo useExternalCombo;

 	private Combo searchLocationCombo;

 	private Combo openModeCombo;

 	private Combo dialogHelpCombo;

 	private Combo windowHelpCombo;

 	/**
 	 * Creates preference page controls on demand.
 	 *
 	 * @param parent
 	 *            the parent for the preference page
 	 */
 	@Override
 	protected Control createContents(Composite parent) {
 		PlatformUI.getWorkbench().getHelpSystem().setHelp(parent,
 				IHelpUIConstants.PREF_PAGE_HELP);
 		Composite mainComposite = new Composite(parent, SWT.NONE);
 		GridData data = new GridData();
 		data.verticalAlignment = GridData.FILL;
 		data.horizontalAlignment = GridData.FILL;
 		mainComposite.setLayoutData(data);
 		GridLayout layout = new GridLayout();
 		layout.marginHeight = 0;
 		layout.marginWidth = 0;
 		mainComposite.setLayout(layout);
 		Label description = new Label(mainComposite, SWT.NONE);
 		description.setText(Messages.select_browser);

 		createOpenModesPrefs(mainComposite);
 		createDynamicHelpArea(mainComposite);
 		createSpacer(mainComposite);
 		Dialog.applyDialogFont(mainComposite);
 		return mainComposite;
 	}

 	private void createOpenModesPrefs(Composite parent) {
 		Group group = new Group(parent, SWT.NONE);
 		GridLayout layout = new GridLayout();		group.setLayout(layout);
 		group.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
 		group.setText(Messages.HelpPreferencePage_openModeGroup);
 		createSearchLocation(group);
 		createHelpViewOpenPrefs(group);
 		createOpenContents(group);
 		createLinkArea(group);
 	}

 	private void createDynamicHelpArea(Composite parent) {
 		Group group = new Group(parent, SWT.NONE);
 		GridLayout layout = new GridLayout();		group.setLayout(layout);
 		group.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
 		group.setText(Messages.HelpPreferencePage_contextHelpGroup);

 		createWindowContextPrefs(group);
 		createDialogContextPrefs(group);
 	}

 	private void createSearchLocation(Composite mainComposite) {
 		Label searchLocationLabel = new Label(mainComposite, SWT.NONE);
 		searchLocationLabel.setText(Messages.HelpPreferencePage_searchLocation);
 		searchLocationLabel.setLayoutData(createLabelData());
 		searchLocationCombo = new Combo(mainComposite, SWT.READ_ONLY);
 		searchLocationCombo.add(Messages.HelpPreferencePage_view);
 		searchLocationCombo.add(Messages.HelpPreferencePage_openInBrowser);
 		searchLocationCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
 		boolean searchFromBrowser = Platform.getPreferencesService().getBoolean
 		    (HelpBasePlugin.PLUGIN_ID, IHelpBaseConstants.P_KEY_SEARCH_FROM_BROWSER, false, null);
 		searchLocationCombo.setText(searchFromBrowser ? Messages.HelpPreferencePage_openInBrowser : Messages.HelpPreferencePage_view);
 	}

 	private void createOpenContents(Composite mainComposite) {
 		if (BrowserManager.getInstance().isEmbeddedBrowserPresent()) {
 		    Label isExternalLabel = new Label(mainComposite, SWT.NONE);
 		    isExternalLabel.setText(Messages.HelpPreferencePage_openContents);
 		    isExternalLabel.setLayoutData(createLabelData());
 			useExternalCombo = new Combo(mainComposite, SWT.READ_ONLY);
 			useExternalCombo.add(Messages.HelpPreferencePage_helpBrowser);
 			useExternalCombo.add(Messages.HelpPreferencePage_externalBrowser);
 			useExternalCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
 			boolean useExternal = Platform.getPreferencesService().getBoolean
 			    (HelpBasePlugin.PLUGIN_ID, IHelpBaseConstants.P_KEY_ALWAYS_EXTERNAL_BROWSER, false, null);
 			useExternalCombo.setText(useExternal ? Messages.HelpPreferencePage_externalBrowser : Messages.HelpPreferencePage_helpBrowser);
 		}
 	}

 	private void createLinkArea(Composite parent) {
 		IPreferenceNode node = getPreferenceNode(WBROWSER_PAGE_ID);
 		if (node != null) {
 			PreferenceLinkArea linkArea = new PreferenceLinkArea(parent,
 					SWT.WRAP, WBROWSER_PAGE_ID,
 					Messages.HelpPreferencePage_message,
 					(IWorkbenchPreferenceContainer) getContainer(), null);
 			GridData data = new GridData(GridData.FILL_HORIZONTAL
 					| GridData.GRAB_HORIZONTAL);
 			linkArea.getControl().setLayoutData(data);
 		}
 	}


 	private void createHelpViewOpenPrefs(Group group) {
 		if (PlatformUI.getWorkbench().getBrowserSupport()
 				.isInternalWebBrowserAvailable()) {
 			Label ohelpDescription = new Label(group, SWT.NONE);
 			ohelpDescription.setText(Messages.HelpPreferencePage_olabel);
 			ohelpDescription.setLayoutData(createLabelData());
 			openModeCombo = new Combo(group, SWT.READ_ONLY);
 			openModeCombo.add(Messages.HelpPreferencePage_openInPlace);
 			openModeCombo.add(Messages.HelpPreferencePage_openInEditor);
 			openModeCombo.add(Messages.HelpPreferencePage_openInBrowser);
 			openModeCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
 			String openMode = Platform.getPreferencesService().getString
 			     (HelpBasePlugin.PLUGIN_ID, IHelpBaseConstants.P_KEY_HELP_VIEW_OPEN_MODE,
 			      IHelpBaseConstants.P_IN_PLACE, null);
 			openModeCombo.setText(openModeToString(openMode));
 		}
 	}

 	private void createDialogContextPrefs(Group group) {
 		Label dhelpDescription = new Label(group, SWT.NONE);
 		dhelpDescription.setText(Messages.HelpPreferencePage_dlabel);
 		dhelpDescription.setLayoutData(createLabelData());
 		dialogHelpCombo = new Combo(group, SWT.READ_ONLY);
 		dialogHelpCombo.add(Messages.HelpPreferencePage_tray);
 		dialogHelpCombo.add(Messages.HelpPreferencePage_infopop);
 		dialogHelpCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
 		boolean dinfopop = Platform.getPreferencesService().getBoolean
 		    (HelpBasePlugin.PLUGIN_ID, IHelpBaseConstants.P_KEY_DIALOG_INFOPOP, false, null);
 		dialogHelpCombo.setText(dinfopop ? Messages.HelpPreferencePage_infopop : Messages.HelpPreferencePage_tray);
 	}

 	private void createWindowContextPrefs(Group group) {
 		Label whelpDescription = new Label(group, SWT.NONE);
 		whelpDescription.setText(Messages.HelpPreferencePage_wlabel);
 		whelpDescription.setLayoutData(createLabelData());

 		windowHelpCombo = new Combo(group, SWT.READ_ONLY);
 		windowHelpCombo.add(Messages.HelpPreferencePage_view);
 		windowHelpCombo.add(Messages.HelpPreferencePage_infopop);
 		windowHelpCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
 		boolean winfopop = Platform.getPreferencesService().getBoolean
 		    (HelpBasePlugin.PLUGIN_ID, IHelpBaseConstants.P_KEY_WINDOW_INFOPOP, false, null);
 		windowHelpCombo.setText(winfopop ? Messages.HelpPreferencePage_infopop : Messages.HelpPreferencePage_view);
 	}

 	private GridData createLabelData () {
 		GridData data = new GridData(SWT.FILL, SWT.CENTER, true, false);
 		data.verticalIndent = 5;
 		return data;
 	}

 	private IPreferenceNode getPreferenceNode(String pageId) {
 		Iterator<IPreferenceNode> iterator = PlatformUI.getWorkbench().getPreferenceManager()
 				.getElements(PreferenceManager.PRE_ORDER).iterator();
 		while (iterator.hasNext()) {
 			IPreferenceNode next = iterator.next();
 			if (next.getId().equals(pageId))
 				return next;
 		}
 		return null;
 	}

 	/**
 	 * @see IWorkbenchPreferencePage
 	 */
 	@Override
 	public void init(IWorkbench workbench) {
 	}

 	/**
 	 * Performs special processing when this page's Defaults button has been
 	 * pressed.
 	 * <p>
 	 * This is a framework hook method for sublcasses to do special things when
 	 * the Defaults button has been pressed. Subclasses may override, but should
 	 * call <code>super.performDefaults</code>.
 	 * </p>
 	 */
 	@Override
 	protected void performDefaults() {
 		IEclipsePreferences defaults = DefaultScope.INSTANCE.getNode(HelpBasePlugin.PLUGIN_ID);
 		if (useExternalCombo != null) {
 			boolean useExternal = defaults.getBoolean(
 							IHelpBaseConstants.P_KEY_ALWAYS_EXTERNAL_BROWSER, false);
 			useExternalCombo.setText(useExternal ? Messages.HelpPreferencePage_externalBrowser : Messages.HelpPreferencePage_helpBrowser);
 		}

 		boolean searchFromBrowser = defaults.getBoolean(IHelpBaseConstants.P_KEY_SEARCH_FROM_BROWSER, false);
 		searchLocationCombo.setText(searchFromBrowser ? Messages.HelpPreferencePage_openInBrowser : Messages.HelpPreferencePage_view);

 		boolean winfopop = defaults.getBoolean(IHelpBaseConstants.P_KEY_WINDOW_INFOPOP, false);
 		windowHelpCombo.setText(winfopop ? Messages.HelpPreferencePage_infopop : Messages.HelpPreferencePage_view);

 		boolean dinfopop = defaults.getBoolean(IHelpBaseConstants.P_KEY_DIALOG_INFOPOP, false);
 		dialogHelpCombo.setText(dinfopop ? Messages.HelpPreferencePage_infopop : Messages.HelpPreferencePage_tray);

 		if (openModeCombo !=null) {
 		   String openMode = defaults.get(
 						IHelpBaseConstants.P_KEY_HELP_VIEW_OPEN_MODE, IHelpBaseConstants.P_IN_PLACE);
 		   openModeCombo.setText(openModeToString(openMode));
 		}

 		super.performDefaults();
 	}

 	/**
 	 * @see IPreferencePage
 	 */
 	@Override
 	public boolean performOk() {
 		IEclipsePreferences pref = InstanceScope.INSTANCE.getNode(HelpBasePlugin.PLUGIN_ID);
 		if (useExternalCombo != null) {
 			boolean isExternalBrowser = useExternalCombo.getText().equals(Messages.HelpPreferencePage_externalBrowser);
 			pref.putBoolean(IHelpBaseConstants.P_KEY_ALWAYS_EXTERNAL_BROWSER,
 					isExternalBrowser);
 			BrowserManager.getInstance().setAlwaysUseExternal(
 					isExternalBrowser);
 		}
 		pref.putBoolean(IHelpBaseConstants.P_KEY_SEARCH_FROM_BROWSER,
 				searchLocationCombo.getText().equals(Messages.HelpPreferencePage_openInBrowser));

 		pref.putBoolean(IHelpBaseConstants.P_KEY_WINDOW_INFOPOP,
 				windowHelpCombo.getText().equals(Messages.HelpPreferencePage_infopop));

 		pref.putBoolean(IHelpBaseConstants.P_KEY_DIALOG_INFOPOP,
 				dialogHelpCombo.getText().equals(Messages.HelpPreferencePage_infopop));
 		if (openModeCombo!=null) {
 			pref.put(IHelpBaseConstants.P_KEY_HELP_VIEW_OPEN_MODE, openModeFromString(openModeCombo.getText()));
 		}

 		try {
 			pref.flush();
 		} catch (BackingStoreException e) {
 			HelpUIPlugin.logError("Failed to save preferences", e); //$NON-NLS-1$
 		}

 		return true;
 	}

 	private String openModeToString(String openMode) {
 	    if (IHelpBaseConstants.P_IN_BROWSER.equals(openMode)) {
 		    return Messages.HelpPreferencePage_openInBrowser;
 	   } else if (IHelpBaseConstants.P_IN_EDITOR.equals(openMode)) {
 		    return Messages.HelpPreferencePage_openInEditor;
 		} else {
 			return Messages.HelpPreferencePage_openInPlace;
 		}
 	}

 	private String openModeFromString(String openMode) {
 	    if (Messages.HelpPreferencePage_openInBrowser.equals(openMode)) {
 		    return IHelpBaseConstants.P_IN_BROWSER;
 	   } else if (Messages.HelpPreferencePage_openInEditor.equals(openMode)) {
 		    return IHelpBaseConstants.P_IN_EDITOR;
 		} else {
 			return IHelpBaseConstants.P_IN_PLACE;
 		}
 	}

 	/**
 	 * Creates a horizontal spacer line that fills the width of its container.
 	 *
 	 * @param parent
 	 *            the parent control
 	 */
 	private void createSpacer(Composite parent) {
 		Label spacer = new Label(parent, SWT.NONE);
 		GridData data = new GridData();
 		data.horizontalAlignment = GridData.FILL;
 		data.verticalAlignment = GridData.BEGINNING;
 		spacer.setLayoutData(data);
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2016 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.preferences;

	import java.util.Iterator;

	import org.eclipse.core.runtime.Platform;
	import org.eclipse.core.runtime.preferences.DefaultScope;
	import org.eclipse.core.runtime.preferences.IEclipsePreferences;
	import org.eclipse.core.runtime.preferences.InstanceScope;
	import org.eclipse.help.internal.base.HelpBasePlugin;
	import org.eclipse.help.internal.base.IHelpBaseConstants;
	import org.eclipse.help.internal.browser.BrowserManager;
	import org.eclipse.help.ui.internal.HelpUIPlugin;
	import org.eclipse.help.ui.internal.IHelpUIConstants;
	import org.eclipse.help.ui.internal.Messages;
	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.preference.IPreferenceNode;
	import org.eclipse.jface.preference.IPreferencePage;
	import org.eclipse.jface.preference.PreferenceManager;
	import org.eclipse.jface.preference.PreferencePage;
	import org.eclipse.swt.SWT;
	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.Group;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.ui.IWorkbench;
	import org.eclipse.ui.IWorkbenchPreferencePage;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.dialogs.PreferenceLinkArea;
	import org.eclipse.ui.preferences.IWorkbenchPreferenceContainer;
	import org.osgi.service.prefs.BackingStoreException;

	/**
	* Preference page for selecting default web browser.
	*/
	public class HelpPreferencePage extends PreferencePage implements
	IWorkbenchPreferencePage {

	private static final String WBROWSER_PAGE_ID = "org.eclipse.ui.browser.preferencePage";//$NON-NLS-1$

	private Combo useExternalCombo;

	private Combo searchLocationCombo;

	private Combo openModeCombo;

	private Combo dialogHelpCombo;

	private Combo windowHelpCombo;

	/**
	* Creates preference page controls on demand.
	*
	* @param parent
	* the parent for the preference page
	*/
	@Override
	protected Control createContents(Composite parent) {
	PlatformUI.getWorkbench().getHelpSystem().setHelp(parent,
	IHelpUIConstants.PREF_PAGE_HELP);
	Composite mainComposite = new Composite(parent, SWT.NONE);
	GridData data = new GridData();
	data.verticalAlignment = GridData.FILL;
	data.horizontalAlignment = GridData.FILL;
	mainComposite.setLayoutData(data);
	GridLayout layout = new GridLayout();
	layout.marginHeight = 0;
	layout.marginWidth = 0;
	mainComposite.setLayout(layout);
	Label description = new Label(mainComposite, SWT.NONE);
	description.setText(Messages.select_browser);

	createOpenModesPrefs(mainComposite);
	createDynamicHelpArea(mainComposite);
	createSpacer(mainComposite);
	Dialog.applyDialogFont(mainComposite);
	return mainComposite;
	}

	private void createOpenModesPrefs(Composite parent) {
	Group group = new Group(parent, SWT.NONE);
	GridLayout layout = new GridLayout(); group.setLayout(layout);
	group.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
	group.setText(Messages.HelpPreferencePage_openModeGroup);
	createSearchLocation(group);
	createHelpViewOpenPrefs(group);
	createOpenContents(group);
	createLinkArea(group);
	}

	private void createDynamicHelpArea(Composite parent) {
	Group group = new Group(parent, SWT.NONE);
	GridLayout layout = new GridLayout(); group.setLayout(layout);
	group.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
	group.setText(Messages.HelpPreferencePage_contextHelpGroup);

	createWindowContextPrefs(group);
	createDialogContextPrefs(group);
	}

	private void createSearchLocation(Composite mainComposite) {
	Label searchLocationLabel = new Label(mainComposite, SWT.NONE);
	searchLocationLabel.setText(Messages.HelpPreferencePage_searchLocation);
	searchLocationLabel.setLayoutData(createLabelData());
	searchLocationCombo = new Combo(mainComposite, SWT.READ_ONLY);
	searchLocationCombo.add(Messages.HelpPreferencePage_view);
	searchLocationCombo.add(Messages.HelpPreferencePage_openInBrowser);
	searchLocationCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
	boolean searchFromBrowser = Platform.getPreferencesService().getBoolean
	(HelpBasePlugin.PLUGIN_ID, IHelpBaseConstants.P_KEY_SEARCH_FROM_BROWSER, false, null);
	searchLocationCombo.setText(searchFromBrowser ? Messages.HelpPreferencePage_openInBrowser : Messages.HelpPreferencePage_view);
	}

	private void createOpenContents(Composite mainComposite) {
	if (BrowserManager.getInstance().isEmbeddedBrowserPresent()) {
	Label isExternalLabel = new Label(mainComposite, SWT.NONE);
	isExternalLabel.setText(Messages.HelpPreferencePage_openContents);
	isExternalLabel.setLayoutData(createLabelData());
	useExternalCombo = new Combo(mainComposite, SWT.READ_ONLY);
	useExternalCombo.add(Messages.HelpPreferencePage_helpBrowser);
	useExternalCombo.add(Messages.HelpPreferencePage_externalBrowser);
	useExternalCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
	boolean useExternal = Platform.getPreferencesService().getBoolean
	(HelpBasePlugin.PLUGIN_ID, IHelpBaseConstants.P_KEY_ALWAYS_EXTERNAL_BROWSER, false, null);
	useExternalCombo.setText(useExternal ? Messages.HelpPreferencePage_externalBrowser : Messages.HelpPreferencePage_helpBrowser);
	}
	}

	private void createLinkArea(Composite parent) {
	IPreferenceNode node = getPreferenceNode(WBROWSER_PAGE_ID);
	if (node != null) {
	PreferenceLinkArea linkArea = new PreferenceLinkArea(parent,
	SWT.WRAP, WBROWSER_PAGE_ID,
	Messages.HelpPreferencePage_message,
	(IWorkbenchPreferenceContainer) getContainer(), null);
	GridData data = new GridData(GridData.FILL_HORIZONTAL
	\| GridData.GRAB_HORIZONTAL);
	linkArea.getControl().setLayoutData(data);
	}
	}


	private void createHelpViewOpenPrefs(Group group) {
	if (PlatformUI.getWorkbench().getBrowserSupport()
	.isInternalWebBrowserAvailable()) {
	Label ohelpDescription = new Label(group, SWT.NONE);
	ohelpDescription.setText(Messages.HelpPreferencePage_olabel);
	ohelpDescription.setLayoutData(createLabelData());
	openModeCombo = new Combo(group, SWT.READ_ONLY);
	openModeCombo.add(Messages.HelpPreferencePage_openInPlace);
	openModeCombo.add(Messages.HelpPreferencePage_openInEditor);
	openModeCombo.add(Messages.HelpPreferencePage_openInBrowser);
	openModeCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
	String openMode = Platform.getPreferencesService().getString
	(HelpBasePlugin.PLUGIN_ID, IHelpBaseConstants.P_KEY_HELP_VIEW_OPEN_MODE,
	IHelpBaseConstants.P_IN_PLACE, null);
	openModeCombo.setText(openModeToString(openMode));
	}
	}

	private void createDialogContextPrefs(Group group) {
	Label dhelpDescription = new Label(group, SWT.NONE);
	dhelpDescription.setText(Messages.HelpPreferencePage_dlabel);
	dhelpDescription.setLayoutData(createLabelData());
	dialogHelpCombo = new Combo(group, SWT.READ_ONLY);
	dialogHelpCombo.add(Messages.HelpPreferencePage_tray);
	dialogHelpCombo.add(Messages.HelpPreferencePage_infopop);
	dialogHelpCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
	boolean dinfopop = Platform.getPreferencesService().getBoolean
	(HelpBasePlugin.PLUGIN_ID, IHelpBaseConstants.P_KEY_DIALOG_INFOPOP, false, null);
	dialogHelpCombo.setText(dinfopop ? Messages.HelpPreferencePage_infopop : Messages.HelpPreferencePage_tray);
	}

	private void createWindowContextPrefs(Group group) {
	Label whelpDescription = new Label(group, SWT.NONE);
	whelpDescription.setText(Messages.HelpPreferencePage_wlabel);
	whelpDescription.setLayoutData(createLabelData());

	windowHelpCombo = new Combo(group, SWT.READ_ONLY);
	windowHelpCombo.add(Messages.HelpPreferencePage_view);
	windowHelpCombo.add(Messages.HelpPreferencePage_infopop);
	windowHelpCombo.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
	boolean winfopop = Platform.getPreferencesService().getBoolean
	(HelpBasePlugin.PLUGIN_ID, IHelpBaseConstants.P_KEY_WINDOW_INFOPOP, false, null);
	windowHelpCombo.setText(winfopop ? Messages.HelpPreferencePage_infopop : Messages.HelpPreferencePage_view);
	}

	private GridData createLabelData () {
	GridData data = new GridData(SWT.FILL, SWT.CENTER, true, false);
	data.verticalIndent = 5;
	return data;
	}

	private IPreferenceNode getPreferenceNode(String pageId) {
	Iterator<IPreferenceNode> iterator = PlatformUI.getWorkbench().getPreferenceManager()
	.getElements(PreferenceManager.PRE_ORDER).iterator();
	while (iterator.hasNext()) {
	IPreferenceNode next = iterator.next();
	if (next.getId().equals(pageId))
	return next;
	}
	return null;
	}

	/**
	* @see IWorkbenchPreferencePage
	*/
	@Override
	public void init(IWorkbench workbench) {
	}

	/**
	* Performs special processing when this page's Defaults button has been
	* pressed.
	* <p>
	* This is a framework hook method for sublcasses to do special things when
	* the Defaults button has been pressed. Subclasses may override, but should
	* call <code>super.performDefaults</code>.
	* </p>
	*/
	@Override
	protected void performDefaults() {
	IEclipsePreferences defaults = DefaultScope.INSTANCE.getNode(HelpBasePlugin.PLUGIN_ID);
	if (useExternalCombo != null) {
	boolean useExternal = defaults.getBoolean(
	IHelpBaseConstants.P_KEY_ALWAYS_EXTERNAL_BROWSER, false);
	useExternalCombo.setText(useExternal ? Messages.HelpPreferencePage_externalBrowser : Messages.HelpPreferencePage_helpBrowser);
	}

	boolean searchFromBrowser = defaults.getBoolean(IHelpBaseConstants.P_KEY_SEARCH_FROM_BROWSER, false);
	searchLocationCombo.setText(searchFromBrowser ? Messages.HelpPreferencePage_openInBrowser : Messages.HelpPreferencePage_view);

	boolean winfopop = defaults.getBoolean(IHelpBaseConstants.P_KEY_WINDOW_INFOPOP, false);
	windowHelpCombo.setText(winfopop ? Messages.HelpPreferencePage_infopop : Messages.HelpPreferencePage_view);

	boolean dinfopop = defaults.getBoolean(IHelpBaseConstants.P_KEY_DIALOG_INFOPOP, false);
	dialogHelpCombo.setText(dinfopop ? Messages.HelpPreferencePage_infopop : Messages.HelpPreferencePage_tray);

	if (openModeCombo !=null) {
	String openMode = defaults.get(
	IHelpBaseConstants.P_KEY_HELP_VIEW_OPEN_MODE, IHelpBaseConstants.P_IN_PLACE);
	openModeCombo.setText(openModeToString(openMode));
	}

	super.performDefaults();
	}

	/**
	* @see IPreferencePage
	*/
	@Override
	public boolean performOk() {
	IEclipsePreferences pref = InstanceScope.INSTANCE.getNode(HelpBasePlugin.PLUGIN_ID);
	if (useExternalCombo != null) {
	boolean isExternalBrowser = useExternalCombo.getText().equals(Messages.HelpPreferencePage_externalBrowser);
	pref.putBoolean(IHelpBaseConstants.P_KEY_ALWAYS_EXTERNAL_BROWSER,
	isExternalBrowser);
	BrowserManager.getInstance().setAlwaysUseExternal(
	isExternalBrowser);
	}
	pref.putBoolean(IHelpBaseConstants.P_KEY_SEARCH_FROM_BROWSER,
	searchLocationCombo.getText().equals(Messages.HelpPreferencePage_openInBrowser));

	pref.putBoolean(IHelpBaseConstants.P_KEY_WINDOW_INFOPOP,
	windowHelpCombo.getText().equals(Messages.HelpPreferencePage_infopop));

	pref.putBoolean(IHelpBaseConstants.P_KEY_DIALOG_INFOPOP,
	dialogHelpCombo.getText().equals(Messages.HelpPreferencePage_infopop));
	if (openModeCombo!=null) {
	pref.put(IHelpBaseConstants.P_KEY_HELP_VIEW_OPEN_MODE, openModeFromString(openModeCombo.getText()));
	}

	try {
	pref.flush();
	} catch (BackingStoreException e) {
	HelpUIPlugin.logError("Failed to save preferences", e); //$NON-NLS-1$
	}

	return true;
	}

	private String openModeToString(String openMode) {
	if (IHelpBaseConstants.P_IN_BROWSER.equals(openMode)) {
	return Messages.HelpPreferencePage_openInBrowser;
	} else if (IHelpBaseConstants.P_IN_EDITOR.equals(openMode)) {
	return Messages.HelpPreferencePage_openInEditor;
	} else {
	return Messages.HelpPreferencePage_openInPlace;
	}
	}

	private String openModeFromString(String openMode) {
	if (Messages.HelpPreferencePage_openInBrowser.equals(openMode)) {
	return IHelpBaseConstants.P_IN_BROWSER;
	} else if (Messages.HelpPreferencePage_openInEditor.equals(openMode)) {
	return IHelpBaseConstants.P_IN_EDITOR;
	} else {
	return IHelpBaseConstants.P_IN_PLACE;
	}
	}

	/**
	* Creates a horizontal spacer line that fills the width of its container.
	*
	* @param parent
	* the parent control
	*/
	private void createSpacer(Composite parent) {
	Label spacer = new Label(parent, SWT.NONE);
	GridData data = new GridData();
	data.horizontalAlignment = GridData.FILL;
	data.verticalAlignment = GridData.BEGINNING;
	spacer.setLayoutData(data);
	}
	}