HTMLPanel.java

//$Header: /cvsroot-fuse/mec-as2/39/mendelson/comm/as2/client/HTMLPanel.java,v 1.1 2012/04/18 14:10:23 heller Exp $
package de.mendelson.comm.as2.client;

import java.awt.Cursor;
import java.awt.Desktop;
import java.io.File;
import java.net.URI;
import java.net.URL;
import javax.servlet.http.HttpServletResponse;
import javax.swing.JPanel;

/*
 * Copyright (C) mendelson-e-commerce GmbH Berlin Germany
 *
 * This software is subject to the license agreement set forth in the license.
 * Please read and agree to all terms before using this software.
 * Other product and brand names are trademarks of their respective owners.
 */
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import org.apache.http.Header;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;

/**
 * Panel that allows to display simple HTML pages
 * @author  S.Heller
 * @version $Revision: 1.1 $
 */
public class HTMLPanel extends JPanel implements HyperlinkListener {

    /** Creates new form HTMLPanel */
    public HTMLPanel() {
        initComponents();
        if (Desktop.isDesktopSupported()) {
            this.jEditorPane.addHyperlinkListener(this);
        }
    }

    /**Sets a new page to the viewer
     */
    public void setPage(File htmlFile) {
        try {
            this.jEditorPane.setPage(htmlFile.toURI().toURL());
        } catch (Exception e) {
            //nop
        }
    }

    /**Sets a new page to the viewer and handles the Stack update
     *@param url URL to move to
     */
    public Header[] setURL(String urlStr, String userAgent, File fallbackOnError) {
        Header[] header = new Header[0];
        try {
            //post for header data
            HttpPost filePost = new HttpPost(new URL(urlStr).toExternalForm());
            HttpParams params = filePost.getParams();
            HttpProtocolParams.setUserAgent(params, userAgent);
            DefaultHttpClient httpClient = new DefaultHttpClient();
            HttpResponse httpResponse = httpClient.execute(filePost);
            header = httpResponse.getAllHeaders();
            int status = httpResponse.getStatusLine().getStatusCode();
            if (status != HttpServletResponse.SC_OK) {
                throw new Exception("HTTP " + status);
            }
            httpClient.getConnectionManager().shutdown();
            //now get for body data
            this.jEditorPane.setPage(new URL(urlStr));
        } catch (Exception e) {
            e.printStackTrace();
            try {
                this.setPage(fallbackOnError);
            } catch (Exception ex) {
                //nop
            }
        }
        return (header);
    }

    /**Listen to be a HyperlinkListener*/
    @Override
    public void hyperlinkUpdate(HyperlinkEvent e) {
        if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
            try {
                URI uri = new URI(e.getURL().toExternalForm());
                Desktop.getDesktop().browse(uri);
            } catch (Exception ex) {
                //nop
            }
        }
        if (e.getEventType() == HyperlinkEvent.EventType.ENTERED) {
            jEditorPane.setCursor(new Cursor(Cursor.HAND_CURSOR));
        }
        if (e.getEventType() == HyperlinkEvent.EventType.EXITED) {
            jEditorPane.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
        }
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {
        java.awt.GridBagConstraints gridBagConstraints;

        jScrollPane = new javax.swing.JScrollPane();
        jEditorPane = new javax.swing.JEditorPane();

        setLayout(new java.awt.GridBagLayout());

        jEditorPane.setContentType("text/html"); // NOI18N
        jEditorPane.setEditable(false);
        jScrollPane.setViewportView(jEditorPane);

        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.weighty = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(5, 5, 5, 5);
        add(jScrollPane, gridBagConstraints);
    }// </editor-fold>//GEN-END:initComponents
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JEditorPane jEditorPane;
    private javax.swing.JScrollPane jScrollPane;
    // End of variables declaration//GEN-END:variables
}