org.eclipse.help.ui/src/org/eclipse/help/ui/internal/browser/embedded/EmbeddedBrowser.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.browser.embedded;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.Vector;

 import org.eclipse.core.runtime.FileLocator;
 import org.eclipse.core.runtime.IProduct;
 import org.eclipse.core.runtime.Path;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.preferences.IEclipsePreferences;
 import org.eclipse.core.runtime.preferences.InstanceScope;
 import org.eclipse.help.internal.base.BaseHelpSystem;
 import org.eclipse.help.internal.base.HelpApplication;
 import org.eclipse.help.internal.util.ProductPreferences;
 import org.eclipse.help.ui.internal.HelpUIPlugin;
 import org.eclipse.help.ui.internal.Messages;
 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.osgi.util.NLS;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.browser.Browser;
 import org.eclipse.swt.browser.LocationAdapter;
 import org.eclipse.swt.browser.LocationEvent;
 import org.eclipse.swt.browser.ProgressEvent;
 import org.eclipse.swt.browser.ProgressListener;
 import org.eclipse.swt.browser.VisibilityWindowListener;
 import org.eclipse.swt.browser.WindowEvent;
 import org.eclipse.swt.events.ControlEvent;
 import org.eclipse.swt.events.ControlListener;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.graphics.Rectangle;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.ProgressBar;
 import org.eclipse.swt.widgets.Shell;
 import org.osgi.framework.Bundle;
 /**
  * Help browser employing SWT Browser widget
  */
 public class EmbeddedBrowser {
 	private static final String BROWSER_X = "browser.x"; //$NON-NLS-1$
 	private static final String BROWSER_Y = "browser.y"; //$NON-NLS-1$
 	private static final String BROWSER_WIDTH = "browser.w"; //$NON-NLS-1$
 	private static final String BROWSER_HEIGTH = "browser.h"; //$NON-NLS-1$
 	private static final String BROWSER_MAXIMIZED = "browser.maximized"; //$NON-NLS-1$
 	private static String initialTitle = getWindowTitle();
 	private Shell shell;
 	private Browser browser;
 	private Composite statusBar;
 	private Label statusBarText;
 	private Label statusBarSeparator;
 	private ProgressBar statusBarProgress;
 	private String statusText;
 	private int x, y, w, h;
 	private long modalRequestTime = 0;
 	private Vector<IBrowserCloseListener> closeListeners = new Vector<>(1);
 	/**
 	 * Constructor for main help window instance
 	 */
 	public EmbeddedBrowser() {
 		int style = SWT.SHELL_TRIM;
 		if (ProductPreferences.isRTL())
 			style |= SWT.RIGHT_TO_LEFT;
 		else
 			style |= SWT.LEFT_TO_RIGHT;
 		shell = new Shell(style);
 		initializeShell(shell);
 		shell.addControlListener(new ControlListener() {

 			@Override
 			public void controlMoved(ControlEvent e) {
 				if (!shell.getMaximized()) {
 					Point location = shell.getLocation();
 					x = location.x;
 					y = location.y;
 				}
 			}

 			@Override
 			public void controlResized(ControlEvent e) {
 				if (!shell.getMaximized()) {
 					Point size = shell.getSize();
 					w = size.x;
 					h = size.y;
 				}
 			}
 		});
 		shell.addDisposeListener(e -> {
 			// save position
 			IEclipsePreferences prefs = InstanceScope.INSTANCE.getNode(HelpUIPlugin.PLUGIN_ID);
 			prefs.putInt(BROWSER_X, x);
 			prefs.putInt(BROWSER_Y, y);
 			prefs.putInt(BROWSER_WIDTH, w);
 			prefs.putInt(BROWSER_HEIGTH, h);
 			prefs.putBoolean(BROWSER_MAXIMIZED, (shell.getMaximized()));
 			notifyCloseListners();
 			if (HelpApplication.isShutdownOnClose()) {
 				HelpApplication.stopHelp();
 			}
 		});

 		browser = new Browser(shell, SWT.NONE);
 		browser.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
 		initialize(browser);

 		createStatusBar(shell);
 		initializeStatusBar(browser);

 		// use saved location and size
 		x = Platform.getPreferencesService().getInt(HelpUIPlugin.PLUGIN_ID, BROWSER_X, 0, null);
 		y = Platform.getPreferencesService().getInt(HelpUIPlugin.PLUGIN_ID, BROWSER_Y, 0, null);
 		w = Platform.getPreferencesService().getInt(HelpUIPlugin.PLUGIN_ID, BROWSER_WIDTH, 0, null);
 		h = Platform.getPreferencesService().getInt(HelpUIPlugin.PLUGIN_ID, BROWSER_HEIGTH, 0, null);
 		if (w == 0 || h == 0) {
 			// first launch, use default size
 			w = 1024;
 			h = 768;
 			x = shell.getLocation().x;
 			y = shell.getLocation().y;
 		}
 		setSafeBounds(shell, x, y, w, h);
 		if (Platform.getPreferencesService().getBoolean(HelpUIPlugin.PLUGIN_ID, BROWSER_MAXIMIZED, false, null))
 			shell.setMaximized(true);
 		shell.addControlListener(new ControlListener() {

 			@Override
 			public void controlMoved(ControlEvent e) {
 				if (!shell.getMaximized()) {
 					Point location = shell.getLocation();
 					x = location.x;
 					y = location.y;
 				}
 			}

 			@Override
 			public void controlResized(ControlEvent e) {
 				if (!shell.getMaximized()) {
 					Point size = shell.getSize();
 					w = size.x;
 					h = size.y;
 				}
 			}
 		});

 		//
 		shell.open();
 		//browser.setUrl("about:blank");

 		browser.addLocationListener(new LocationAdapter() {

 			@Override
 			public void changing(LocationEvent e) {
 				// hack to know when help webapp needs modal window
 				modalRequestTime = 0;
 				if (e.location != null
 						&& e.location.startsWith("javascript://needModal")) { //$NON-NLS-1$
 					modalRequestTime = System.currentTimeMillis();
 				}
 				if (!e.doit && e.location != null
 						&& e.location.startsWith("https://")) { //$NON-NLS-1$
 					try {
 						BaseHelpSystem.getHelpBrowser(true).displayURL(
 								e.location);
 					} catch (Exception exc) {
 					}
 				}
 			}
 		});
 	}
 	/**
 	 * Constructor for derived help window It is either secondary browser or a
 	 * help dialog
 	 *
 	 * @param event
 	 * @param parent
 	 *            Shell or null
 	 */
 	public EmbeddedBrowser(WindowEvent event, Shell parent) {
 		if (parent == null){
 			int style = SWT.SHELL_TRIM;
 			if (ProductPreferences.isRTL())
 				style |= SWT.RIGHT_TO_LEFT;
 			else
 				style |= SWT.LEFT_TO_RIGHT;
 			shell = new Shell(style);
 		} else
 			shell = new Shell(parent, SWT.PRIMARY_MODAL | SWT.DIALOG_TRIM | SWT.RESIZE);
 		initializeShell(shell);
 		Browser browser = new Browser(shell, SWT.NONE);
 		browser.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

 		initialize(browser);
 		event.browser = browser;

 		browser.addLocationListener(new LocationAdapter() {

 			@Override
 			public void changing(LocationEvent e) {
 				// hack to know when help webapp needs modal window
 				modalRequestTime = 0;
 				if (e.location != null
 						&& e.location.startsWith("javascript://needModal")) { //$NON-NLS-1$
 					modalRequestTime = System.currentTimeMillis();
 				}
 			}
 		});
 	}
 	private static void initializeShell(Shell s) {
 		s.setText(initialTitle);
 		final Image[] shellImages = createImages();
 		if (shellImages != null)
 			s.setImages(shellImages);
 		GridLayout layout = new GridLayout();
 		layout.marginWidth = 0;
 		layout.marginHeight = 0;
 		layout.verticalSpacing = 0;
 		layout.horizontalSpacing = 0;
 		s.setLayout(layout);
 		s.addDisposeListener(e -> {
 			if (shellImages != null) {
 				for (int i = 0; i < shellImages.length; i++) {
 					shellImages[i].dispose();
 				}
 			}
 		});

 	}
 	private void initialize(Browser browser) {
 		browser.addOpenWindowListener(event -> {
 			if (System.currentTimeMillis() - modalRequestTime <= 1000) {
 				new EmbeddedBrowser(event, shell);
 			} else if (event.required) {
 				new EmbeddedBrowser(event, null);
 			} else {
 				displayURLExternal(event);
 			}
 		});
 		browser.addVisibilityWindowListener(new VisibilityWindowListener() {

 			@Override
 			public void hide(WindowEvent event) {
 				Browser browser = (Browser) event.widget;
 				Shell shell = browser.getShell();
 				shell.setVisible(false);
 			}

 			@Override
 			public void show(WindowEvent event) {
 				Browser browser = (Browser) event.widget;
 				Shell shell = browser.getShell();
 				if (event.location != null)
 					shell.setLocation(event.location);
 				if (event.size != null) {
 					Point size = event.size;
 					shell.setSize(shell.computeSize(size.x, size.y));
 				}
 				shell.open();
 			}
 		});
 		browser.addCloseWindowListener(event -> {
 			Browser browser1 = (Browser) event.widget;
 			Shell shell = browser1.getShell();
 			shell.close();
 		});
 		browser.addTitleListener(event -> {
 			if (event.title != null && event.title.length() > 0) {
 				Browser browser1 = (Browser) event.widget;
 				Shell shell = browser1.getShell();
 				shell.setText(event.title);
 			}
 		});
 		browser.addLocationListener(new LocationAdapter() {

 			@Override
 			public void changing(LocationEvent e) {
 				if (!e.doit && e.location != null
 						&& e.location.startsWith("https://")) { //$NON-NLS-1$
 					try {
 						BaseHelpSystem.getHelpBrowser(true).displayURL(
 								e.location);
 					} catch (Exception exc) {
 					}
 				}
 			}
 		});
 	}

 	private void initializeStatusBar(Browser browser) {
 		browser.addStatusTextListener(event -> {
 			event.text = event.text.replaceAll("&", "&&"); //$NON-NLS-1$ //$NON-NLS-2$
 			if (!event.text.equals(statusText)) {
 				statusText = event.text;
 				statusBarText.setText(statusText);
 			}
 		});
 		browser.addProgressListener(new ProgressListener() {

 			@Override
 			public void changed(ProgressEvent event) {
 				if (event.total > 0) {
 					statusBarProgress.setMaximum(event.total);
 					statusBarProgress.setSelection(Math.min(event.current, event.total));
 					statusBarSeparator.setVisible(true);
 					statusBarProgress.setVisible(true);
 				}
 			}

 			@Override
 			public void completed(ProgressEvent event) {
 				statusBarSeparator.setVisible(false);
 				statusBarProgress.setVisible(false);
 			}
 		});
 	}

 	private void createStatusBar(Composite parent) {
 		statusBar = new Composite(parent, SWT.NONE);
 		statusBar.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
 		GridLayout layout =  new GridLayout(3, false);
 		layout.marginWidth = 0;
 		layout.marginHeight = 0;
 		layout.marginTop = 0;
 		layout.marginLeft = 5;
 		layout.marginRight = 5;
 		layout.marginBottom = 5;
 		statusBar.setLayout(layout);
 		statusBarText = new Label(statusBar, SWT.NONE);
 		statusBarText.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
 		statusBarSeparator = new Label(statusBar, SWT.SEPARATOR | SWT.VERTICAL);
 		statusBarSeparator.setVisible(false);
 		statusBarProgress = new ProgressBar(statusBar, SWT.HORIZONTAL);
 		GridData data = new GridData(SWT.FILL, SWT.CENTER, false, false);
 		data.widthHint = 100;
 		statusBarProgress.setLayoutData(data);
 		statusBarProgress.setVisible(false);
 		statusBarProgress.setMinimum(0);

 		/*
 		 * Vertical separator labels are naturally too tall for the status bar.
 		 * Size it to match the tallest of the text and progress bar.
 		 */
 		data = new GridData(SWT.FILL, SWT.CENTER, false, false);
 		data.heightHint = Math.max(statusBarText.computeSize(SWT.DEFAULT, SWT.DEFAULT).y, statusBarProgress.computeSize(SWT.DEFAULT, SWT.DEFAULT).y);
 		statusBarSeparator.setLayoutData(data);
 	}

 	public void displayUrl(String url) {
 		browser.setUrl(url);
 		shell.setMinimized(false);
 		shell.forceActive();
 	}
 	private void displayURLExternal(WindowEvent e) {
 		final Shell externalShell = new Shell(shell, SWT.NONE);
 		Browser externalBrowser = new Browser(externalShell, SWT.NONE);
 		externalBrowser.addLocationListener(new LocationAdapter() {

 			@Override
 			public void changing(final LocationEvent e) {
 				e.doit = false;
 				try {
 					BaseHelpSystem.getHelpBrowser(true).displayURL(e.location);
 				}
 				catch (Throwable t) {
 					String msg = "Error opening external Web browser"; //$NON-NLS-1$
 					HelpUIPlugin.logError(msg, t);
 				}
 				externalShell.getDisplay().asyncExec(() -> externalShell.dispose());
 			}
 		});
 		e.browser = externalBrowser;
 	}
 	public boolean isDisposed() {
 		return shell.isDisposed();
 	}
 	private static String getWindowTitle() {
 		if (Platform.getPreferencesService().getBoolean(HelpUIPlugin.PLUGIN_ID, "windowTitlePrefix", false, null)) { //$NON-NLS-1$
 			return NLS.bind(Messages.browserTitle, BaseHelpSystem
             .getProductName());
 		}
 		return BaseHelpSystem.getProductName();
 	}
 	/**
 	 * Create shell images
 	 */
 	private static Image[] createImages() {
 		String[] productImageURLs = getProductImageURLs();
 		if (productImageURLs != null) {
 			ArrayList<Image> shellImgs = new ArrayList<>();
 			for (int i = 0; i < productImageURLs.length; i++) {
 				if ("".equals(productImageURLs[i])) { //$NON-NLS-1$
 					continue;
 				}
 				URL imageURL = null;
 				try {
 					imageURL = new URL(productImageURLs[i]);
 				} catch (MalformedURLException mue) {
 					// must be a path relative to the product bundle
 					IProduct product = Platform.getProduct();
 					if (product != null) {
 						Bundle productBundle = product.getDefiningBundle();
 						if (productBundle != null) {
 							imageURL = FileLocator.find(productBundle, new Path(
 									productImageURLs[i]), null);
 						}
 					}
 				}
 				Image image = null;
 				if (imageURL != null) {
 					image = ImageDescriptor.createFromURL(imageURL)
 							.createImage();
 				}
 				if (image != null) {
 					shellImgs.add(image);
 				}
 			}
 			return shellImgs.toArray(new Image[shellImgs.size()]);
 		}
 		return new Image[0];
 	}
 	/**
 	 * Obtains URLs to product image
 	 *
 	 * @return String[] with URLs as Strings or null
 	 */
 	private static String[] getProductImageURLs() {
 		IProduct product = Platform.getProduct();
 		if (product != null) {
 			String url = product.getProperty("windowImages"); //$NON-NLS-1$
 			if (url != null && url.length() > 0) {
 				return url.split(",\\s*"); //$NON-NLS-1$
 			}
 			url = product.getProperty("windowImage"); //$NON-NLS-1$
 			if (url != null && url.length() > 0) {
 				return new String[]{url};
 			}
 		}
 		return null;
 	}
 	/**
 	 * Closes the browser.
 	 */
 	public void close() {
 		if (!shell.isDisposed())
 			shell.dispose();
 	}
 	private static void setSafeBounds(Shell s, int x, int y, int width,
 			int height) {
 		Rectangle clientArea = s.getDisplay().getClientArea();
 		width = Math.min(clientArea.width, width);
 		height = Math.min(clientArea.height, height);
 		x = Math.min(x + width, clientArea.x + clientArea.width) - width;
 		y = Math.min(y + height, clientArea.y + clientArea.height) - height;
 		x = Math.max(x, clientArea.x);
 		y = Math.max(y, clientArea.y);
 		s.setBounds(x, y, width, height);
 	}
 	public void setLocation(int x, int y) {
 		shell.setLocation(x, y);
 	}
 	public void setSize(int width, int height) {
 		shell.setSize(w, h);
 	}
 	private void notifyCloseListners() {
 		for (Iterator<IBrowserCloseListener> it = closeListeners.iterator(); it.hasNext();) {
 			IBrowserCloseListener listener = it.next();
 			listener.browserClosed();
 		}
 	}

 	public void addCloseListener(IBrowserCloseListener listener) {
 		if (!closeListeners.contains(listener)) {
 			closeListeners.add(listener);
 		}
 	}

 	public void removeCloseListener(IBrowserCloseListener listener) {
 		closeListeners.remove(listener);
 	}
 }
	/*******************************************************************************
	* 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.browser.embedded;
	import java.net.MalformedURLException;
	import java.net.URL;
	import java.util.ArrayList;
	import java.util.Iterator;
	import java.util.Vector;

	import org.eclipse.core.runtime.FileLocator;
	import org.eclipse.core.runtime.IProduct;
	import org.eclipse.core.runtime.Path;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.core.runtime.preferences.IEclipsePreferences;
	import org.eclipse.core.runtime.preferences.InstanceScope;
	import org.eclipse.help.internal.base.BaseHelpSystem;
	import org.eclipse.help.internal.base.HelpApplication;
	import org.eclipse.help.internal.util.ProductPreferences;
	import org.eclipse.help.ui.internal.HelpUIPlugin;
	import org.eclipse.help.ui.internal.Messages;
	import org.eclipse.jface.resource.ImageDescriptor;
	import org.eclipse.osgi.util.NLS;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.browser.Browser;
	import org.eclipse.swt.browser.LocationAdapter;
	import org.eclipse.swt.browser.LocationEvent;
	import org.eclipse.swt.browser.ProgressEvent;
	import org.eclipse.swt.browser.ProgressListener;
	import org.eclipse.swt.browser.VisibilityWindowListener;
	import org.eclipse.swt.browser.WindowEvent;
	import org.eclipse.swt.events.ControlEvent;
	import org.eclipse.swt.events.ControlListener;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.graphics.Point;
	import org.eclipse.swt.graphics.Rectangle;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.ProgressBar;
	import org.eclipse.swt.widgets.Shell;
	import org.osgi.framework.Bundle;
	/**
	* Help browser employing SWT Browser widget
	*/
	public class EmbeddedBrowser {
	private static final String BROWSER_X = "browser.x"; //$NON-NLS-1$
	private static final String BROWSER_Y = "browser.y"; //$NON-NLS-1$
	private static final String BROWSER_WIDTH = "browser.w"; //$NON-NLS-1$
	private static final String BROWSER_HEIGTH = "browser.h"; //$NON-NLS-1$
	private static final String BROWSER_MAXIMIZED = "browser.maximized"; //$NON-NLS-1$
	private static String initialTitle = getWindowTitle();
	private Shell shell;
	private Browser browser;
	private Composite statusBar;
	private Label statusBarText;
	private Label statusBarSeparator;
	private ProgressBar statusBarProgress;
	private String statusText;
	private int x, y, w, h;
	private long modalRequestTime = 0;
	private Vector<IBrowserCloseListener> closeListeners = new Vector<>(1);
	/**
	* Constructor for main help window instance
	*/
	public EmbeddedBrowser() {
	int style = SWT.SHELL_TRIM;
	if (ProductPreferences.isRTL())
	style \|= SWT.RIGHT_TO_LEFT;
	else
	style \|= SWT.LEFT_TO_RIGHT;
	shell = new Shell(style);
	initializeShell(shell);
	shell.addControlListener(new ControlListener() {

	@Override
	public void controlMoved(ControlEvent e) {
	if (!shell.getMaximized()) {
	Point location = shell.getLocation();
	x = location.x;
	y = location.y;
	}
	}

	@Override
	public void controlResized(ControlEvent e) {
	if (!shell.getMaximized()) {
	Point size = shell.getSize();
	w = size.x;
	h = size.y;
	}
	}
	});
	shell.addDisposeListener(e -> {
	// save position
	IEclipsePreferences prefs = InstanceScope.INSTANCE.getNode(HelpUIPlugin.PLUGIN_ID);
	prefs.putInt(BROWSER_X, x);
	prefs.putInt(BROWSER_Y, y);
	prefs.putInt(BROWSER_WIDTH, w);
	prefs.putInt(BROWSER_HEIGTH, h);
	prefs.putBoolean(BROWSER_MAXIMIZED, (shell.getMaximized()));
	notifyCloseListners();
	if (HelpApplication.isShutdownOnClose()) {
	HelpApplication.stopHelp();
	}
	});

	browser = new Browser(shell, SWT.NONE);
	browser.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
	initialize(browser);

	createStatusBar(shell);
	initializeStatusBar(browser);

	// use saved location and size
	x = Platform.getPreferencesService().getInt(HelpUIPlugin.PLUGIN_ID, BROWSER_X, 0, null);
	y = Platform.getPreferencesService().getInt(HelpUIPlugin.PLUGIN_ID, BROWSER_Y, 0, null);
	w = Platform.getPreferencesService().getInt(HelpUIPlugin.PLUGIN_ID, BROWSER_WIDTH, 0, null);
	h = Platform.getPreferencesService().getInt(HelpUIPlugin.PLUGIN_ID, BROWSER_HEIGTH, 0, null);
	if (w == 0 \|\| h == 0) {
	// first launch, use default size
	w = 1024;
	h = 768;
	x = shell.getLocation().x;
	y = shell.getLocation().y;
	}
	setSafeBounds(shell, x, y, w, h);
	if (Platform.getPreferencesService().getBoolean(HelpUIPlugin.PLUGIN_ID, BROWSER_MAXIMIZED, false, null))
	shell.setMaximized(true);
	shell.addControlListener(new ControlListener() {

	@Override
	public void controlMoved(ControlEvent e) {
	if (!shell.getMaximized()) {
	Point location = shell.getLocation();
	x = location.x;
	y = location.y;
	}
	}

	@Override
	public void controlResized(ControlEvent e) {
	if (!shell.getMaximized()) {
	Point size = shell.getSize();
	w = size.x;
	h = size.y;
	}
	}
	});

	//
	shell.open();
	//browser.setUrl("about:blank");

	browser.addLocationListener(new LocationAdapter() {

	@Override
	public void changing(LocationEvent e) {
	// hack to know when help webapp needs modal window
	modalRequestTime = 0;
	if (e.location != null
	&& e.location.startsWith("javascript://needModal")) { //$NON-NLS-1$
	modalRequestTime = System.currentTimeMillis();
	}
	if (!e.doit && e.location != null
	&& e.location.startsWith("https://")) { //$NON-NLS-1$
	try {
	BaseHelpSystem.getHelpBrowser(true).displayURL(
	e.location);
	} catch (Exception exc) {
	}
	}
	}
	});
	}
	/**
	* Constructor for derived help window It is either secondary browser or a
	* help dialog
	*
	* @param event
	* @param parent
	* Shell or null
	*/
	public EmbeddedBrowser(WindowEvent event, Shell parent) {
	if (parent == null){
	int style = SWT.SHELL_TRIM;
	if (ProductPreferences.isRTL())
	style \|= SWT.RIGHT_TO_LEFT;
	else
	style \|= SWT.LEFT_TO_RIGHT;
	shell = new Shell(style);
	} else
	shell = new Shell(parent, SWT.PRIMARY_MODAL \| SWT.DIALOG_TRIM \| SWT.RESIZE);
	initializeShell(shell);
	Browser browser = new Browser(shell, SWT.NONE);
	browser.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

	initialize(browser);
	event.browser = browser;

	browser.addLocationListener(new LocationAdapter() {

	@Override
	public void changing(LocationEvent e) {
	// hack to know when help webapp needs modal window
	modalRequestTime = 0;
	if (e.location != null
	&& e.location.startsWith("javascript://needModal")) { //$NON-NLS-1$
	modalRequestTime = System.currentTimeMillis();
	}
	}
	});
	}
	private static void initializeShell(Shell s) {
	s.setText(initialTitle);
	final Image[] shellImages = createImages();
	if (shellImages != null)
	s.setImages(shellImages);
	GridLayout layout = new GridLayout();
	layout.marginWidth = 0;
	layout.marginHeight = 0;
	layout.verticalSpacing = 0;
	layout.horizontalSpacing = 0;
	s.setLayout(layout);
	s.addDisposeListener(e -> {
	if (shellImages != null) {
	for (int i = 0; i < shellImages.length; i++) {
	shellImages[i].dispose();
	}
	}
	});

	}
	private void initialize(Browser browser) {
	browser.addOpenWindowListener(event -> {
	if (System.currentTimeMillis() - modalRequestTime <= 1000) {
	new EmbeddedBrowser(event, shell);
	} else if (event.required) {
	new EmbeddedBrowser(event, null);
	} else {
	displayURLExternal(event);
	}
	});
	browser.addVisibilityWindowListener(new VisibilityWindowListener() {

	@Override
	public void hide(WindowEvent event) {
	Browser browser = (Browser) event.widget;
	Shell shell = browser.getShell();
	shell.setVisible(false);
	}

	@Override
	public void show(WindowEvent event) {
	Browser browser = (Browser) event.widget;
	Shell shell = browser.getShell();
	if (event.location != null)
	shell.setLocation(event.location);
	if (event.size != null) {
	Point size = event.size;
	shell.setSize(shell.computeSize(size.x, size.y));
	}
	shell.open();
	}
	});
	browser.addCloseWindowListener(event -> {
	Browser browser1 = (Browser) event.widget;
	Shell shell = browser1.getShell();
	shell.close();
	});
	browser.addTitleListener(event -> {
	if (event.title != null && event.title.length() > 0) {
	Browser browser1 = (Browser) event.widget;
	Shell shell = browser1.getShell();
	shell.setText(event.title);
	}
	});
	browser.addLocationListener(new LocationAdapter() {

	@Override
	public void changing(LocationEvent e) {
	if (!e.doit && e.location != null
	&& e.location.startsWith("https://")) { //$NON-NLS-1$
	try {
	BaseHelpSystem.getHelpBrowser(true).displayURL(
	e.location);
	} catch (Exception exc) {
	}
	}
	}
	});
	}

	private void initializeStatusBar(Browser browser) {
	browser.addStatusTextListener(event -> {
	event.text = event.text.replaceAll("&", "&&"); //$NON-NLS-1$ //$NON-NLS-2$
	if (!event.text.equals(statusText)) {
	statusText = event.text;
	statusBarText.setText(statusText);
	}
	});
	browser.addProgressListener(new ProgressListener() {

	@Override
	public void changed(ProgressEvent event) {
	if (event.total > 0) {
	statusBarProgress.setMaximum(event.total);
	statusBarProgress.setSelection(Math.min(event.current, event.total));
	statusBarSeparator.setVisible(true);
	statusBarProgress.setVisible(true);
	}
	}

	@Override
	public void completed(ProgressEvent event) {
	statusBarSeparator.setVisible(false);
	statusBarProgress.setVisible(false);
	}
	});
	}

	private void createStatusBar(Composite parent) {
	statusBar = new Composite(parent, SWT.NONE);
	statusBar.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
	GridLayout layout = new GridLayout(3, false);
	layout.marginWidth = 0;
	layout.marginHeight = 0;
	layout.marginTop = 0;
	layout.marginLeft = 5;
	layout.marginRight = 5;
	layout.marginBottom = 5;
	statusBar.setLayout(layout);
	statusBarText = new Label(statusBar, SWT.NONE);
	statusBarText.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
	statusBarSeparator = new Label(statusBar, SWT.SEPARATOR \| SWT.VERTICAL);
	statusBarSeparator.setVisible(false);
	statusBarProgress = new ProgressBar(statusBar, SWT.HORIZONTAL);
	GridData data = new GridData(SWT.FILL, SWT.CENTER, false, false);
	data.widthHint = 100;
	statusBarProgress.setLayoutData(data);
	statusBarProgress.setVisible(false);
	statusBarProgress.setMinimum(0);

	/*
	* Vertical separator labels are naturally too tall for the status bar.
	* Size it to match the tallest of the text and progress bar.
	*/
	data = new GridData(SWT.FILL, SWT.CENTER, false, false);
	data.heightHint = Math.max(statusBarText.computeSize(SWT.DEFAULT, SWT.DEFAULT).y, statusBarProgress.computeSize(SWT.DEFAULT, SWT.DEFAULT).y);
	statusBarSeparator.setLayoutData(data);
	}

	public void displayUrl(String url) {
	browser.setUrl(url);
	shell.setMinimized(false);
	shell.forceActive();
	}
	private void displayURLExternal(WindowEvent e) {
	final Shell externalShell = new Shell(shell, SWT.NONE);
	Browser externalBrowser = new Browser(externalShell, SWT.NONE);
	externalBrowser.addLocationListener(new LocationAdapter() {

	@Override
	public void changing(final LocationEvent e) {
	e.doit = false;
	try {
	BaseHelpSystem.getHelpBrowser(true).displayURL(e.location);
	}
	catch (Throwable t) {
	String msg = "Error opening external Web browser"; //$NON-NLS-1$
	HelpUIPlugin.logError(msg, t);
	}
	externalShell.getDisplay().asyncExec(() -> externalShell.dispose());
	}
	});
	e.browser = externalBrowser;
	}
	public boolean isDisposed() {
	return shell.isDisposed();
	}
	private static String getWindowTitle() {
	if (Platform.getPreferencesService().getBoolean(HelpUIPlugin.PLUGIN_ID, "windowTitlePrefix", false, null)) { //$NON-NLS-1$
	return NLS.bind(Messages.browserTitle, BaseHelpSystem
	.getProductName());
	}
	return BaseHelpSystem.getProductName();
	}
	/**
	* Create shell images
	*/
	private static Image[] createImages() {
	String[] productImageURLs = getProductImageURLs();
	if (productImageURLs != null) {
	ArrayList<Image> shellImgs = new ArrayList<>();
	for (int i = 0; i < productImageURLs.length; i++) {
	if ("".equals(productImageURLs[i])) { //$NON-NLS-1$
	continue;
	}
	URL imageURL = null;
	try {
	imageURL = new URL(productImageURLs[i]);
	} catch (MalformedURLException mue) {
	// must be a path relative to the product bundle
	IProduct product = Platform.getProduct();
	if (product != null) {
	Bundle productBundle = product.getDefiningBundle();
	if (productBundle != null) {
	imageURL = FileLocator.find(productBundle, new Path(
	productImageURLs[i]), null);
	}
	}
	}
	Image image = null;
	if (imageURL != null) {
	image = ImageDescriptor.createFromURL(imageURL)
	.createImage();
	}
	if (image != null) {
	shellImgs.add(image);
	}
	}
	return shellImgs.toArray(new Image[shellImgs.size()]);
	}
	return new Image[0];
	}
	/**
	* Obtains URLs to product image
	*
	* @return String[] with URLs as Strings or null
	*/
	private static String[] getProductImageURLs() {
	IProduct product = Platform.getProduct();
	if (product != null) {
	String url = product.getProperty("windowImages"); //$NON-NLS-1$
	if (url != null && url.length() > 0) {
	return url.split(",\\s*"); //$NON-NLS-1$
	}
	url = product.getProperty("windowImage"); //$NON-NLS-1$
	if (url != null && url.length() > 0) {
	return new String[]{url};
	}
	}
	return null;
	}
	/**
	* Closes the browser.
	*/
	public void close() {
	if (!shell.isDisposed())
	shell.dispose();
	}
	private static void setSafeBounds(Shell s, int x, int y, int width,
	int height) {
	Rectangle clientArea = s.getDisplay().getClientArea();
	width = Math.min(clientArea.width, width);
	height = Math.min(clientArea.height, height);
	x = Math.min(x + width, clientArea.x + clientArea.width) - width;
	y = Math.min(y + height, clientArea.y + clientArea.height) - height;
	x = Math.max(x, clientArea.x);
	y = Math.max(y, clientArea.y);
	s.setBounds(x, y, width, height);
	}
	public void setLocation(int x, int y) {
	shell.setLocation(x, y);
	}
	public void setSize(int width, int height) {
	shell.setSize(w, h);
	}
	private void notifyCloseListners() {
	for (Iterator<IBrowserCloseListener> it = closeListeners.iterator(); it.hasNext();) {
	IBrowserCloseListener listener = it.next();
	listener.browserClosed();
	}
	}

	public void addCloseListener(IBrowserCloseListener listener) {
	if (!closeListeners.contains(listener)) {
	closeListeners.add(listener);
	}
	}

	public void removeCloseListener(IBrowserCloseListener listener) {
	closeListeners.remove(listener);
	}
	}