import java.awt.BorderLayout;
import java.io.Reader;
import java.io.FileReader;
import java.io.IOException;
 
import javax.swing.JFrame;
import javax.swing.JEditorPane;
import javax.swing.JScrollPane;
 
import javax.swing.text.Document;
import javax.swing.text.EditorKit;
 
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLEditorKit;
 
import org.apache.log4j.Category;
import org.apache.log4j.BasicConfigurator;
 
/**
  * This class just demonstrate how to render an HTML document in a 
  * JFrame.
  * Three different cases are proposed.
  *
  * @see http://manning.com/sbe/files/uts2/Chapter27html/Chapter27.htm
  * @see http://www.ibiblio.org/javafaq/slides/sd2000east/webclient/25.html
  * @see http://www.cs.cf.ac.uk/Dave/HCI/HCI_Handout_CALLER/
  *
  * See respective authors for Copyright issues.
  * This document is provided "as is".
  * @see javax.swing.text.html.HTMLDocument
  *
  * @version 0.15 - final
  * @author <a href="mailto:tsmets@altern.org">Thomas SMETS</a>
  * 
  */
public class HTMLRendering
  extends JFrame
{
  Document d = null;  
  JEditorPane t = null;
  Category log = null;
  
  HTMLRendering (String aName)
  {    
    log = Category.getInstance(HTMLRendering.class);
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    getContentPane().setLayout(new BorderLayout());
    setTitle( aName );
    
    t = new JEditorPane ();
    t.setEditable(false);    
      
    JScrollPane p = new JScrollPane (t);
    p.getViewport().add (t);
    p.setBounds (0, 0, 150,150);
    p.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
    p.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
    getContentPane().add(p, BorderLayout.CENTER);
    setSize(350, 750);
    setVisible(true);      
    log.info ("HTMLRendering created");
  }
  
 
  
  public void initializeURL (String anURL)
  {
    log.info ("HTMLRendering::initializeURL ()");
    try 
    {
      log.info("Loading the URL");
      t.setPage(anURL);
      log.info("Loaded");
    }
    catch (Exception ex) 
    {
      log.warn("Exception " + ex.getClass().getName(), ex);
    }
    return;     
  }  
  
  public void initializeFile (String aFileName)
  {
    log.info ("HTMLRendering::initializeFile");
    try 
    {
      FileReader fr = new FileReader( aFileName );      
      t.read(fr, aFileName);
    } catch (IOException ioe)
    {
      log.warn("Exception thrown " + ioe.getClass(), ioe);      
    }
  }
  
  public void initializeHTMLFile (String aFileName)
  {
    log.info ("HTMLRendering::initializeHTMLFile");
    try 
    {
      t.setEditorKit(new HTMLEditorKit());
      FileReader fr = new FileReader( aFileName );      
      t.read(fr, aFileName);
    } catch (IOException ioe)
    {
      log.warn("Exception thrown " + ioe.getClass(), ioe);      
    }
  }  
  
  public static void main (String[] args)
  {
    BasicConfigurator.resetConfiguration();
    BasicConfigurator.configure();
    
    HTMLRendering html = new HTMLRendering ("Example - HTML file");
    html.initializeHTMLFile ("SimpleHTML.html");
    
    html = new HTMLRendering ("Example - HTML from URL");
    html.initializeURL ("http://tsmets.lautre.net");
    
    html = new HTMLRendering ("Example - HTML Viewed as pure text");
    html.initializeFile ("SimpleHTML.html");
  }
}