WebBrowser.java

package org.eurocarbdb.application.glycoworkbench;

import java.awt.BorderLayout;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.HttpURLConnection;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;

import javax.swing.BorderFactory;
import javax.swing.JPanel;

import chrriis.dj.nativeswing.swtimpl.components.JWebBrowser;

public class WebBrowser extends JPanel {
	final public JWebBrowser webBrowser;

	public WebBrowser() {
		super(new BorderLayout());
		JPanel webBrowserPanel = new JPanel(new BorderLayout());
		webBrowserPanel.setBorder(BorderFactory
				.createTitledBorder("Native Web Browser component"));
		webBrowser = new JWebBrowser();
		webBrowser.navigate("http://www.google.com");
		webBrowser.setMenuBarVisible(false);
		webBrowserPanel.add(webBrowser, BorderLayout.CENTER);
		add(webBrowserPanel, BorderLayout.CENTER);

		// // Create an additional bar allowing to show/hide the menu bar of the
		// web browser.
		// JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 4,
		// 4));
		// JCheckBox menuBarCheckBox = new JCheckBox("Menu Bar",
		// webBrowser.isMenuBarVisible());
		// menuBarCheckBox.addItemListener(new ItemListener() {
		// public void itemStateChanged(ItemEvent e) {
		// webBrowser.setMenuBarVisible(e.getStateChange() ==
		// ItemEvent.SELECTED);
		// }
		// });
		// buttonPanel.add(menuBarCheckBox);
		// add(buttonPanel, BorderLayout.SOUTH);
	}

	public void openResource(URL remoteResource, String localResource,
			boolean localInJar) throws URISyntaxException, IOException {
		//this.webBrowser.navigate(remoteResource.toString());

		if (checkSiteExists(remoteResource)) {
			this.webBrowser.navigate(remoteResource.toString());
		}else{
			if (localInJar) {
				this.openResource(new File(localResource));
			} else {
				this.webBrowser.navigate(localResource.toString());
			}
		}
	}

	public boolean checkSiteExists(URL url) {
		try {
			HttpURLConnection.setFollowRedirects(false);

			HttpURLConnection con = (HttpURLConnection) url
					.openConnection();
			con.setRequestMethod("HEAD");
			return (con.getResponseCode() == HttpURLConnection.HTTP_OK);
		} catch (Exception e) {
			//e.printStackTrace();
			return false;
		}
	}

	public void openResource(URL url) throws URISyntaxException, IOException {
		openResource(url.toURI());
	}

	public void openResource(URI uri) throws IOException {
		openResource(new File(uri));
	}

	public void openResource(InputStream inputStream) throws IOException {

		openResource(new InputStreamReader(inputStream));
	}

	public void openResource(File file) throws FileNotFoundException,
			IOException {
		openResource(new FileReader(file));
	}

	public void openResource(Reader reader) throws IOException {
		BufferedReader bufferedReader = new BufferedReader(reader);

		StringBuffer buf = new StringBuffer();
		String line;

		while ((line = bufferedReader.readLine()) != null) {
			buf.append(line);
		}

		bufferedReader.close();
		reader.close();

		this.setHTMLContent(buf.toString());
	}

	public void setHTMLContent(String content) {
		webBrowser.setHTMLContent(content);
	}
}