java simple editor

This is a java based editor, I will just keep it here at the moment till i have some time to examine it, this is another good reference: http://www.java2s.com/Tutorial/Java/0240__Swing/EditorbasedonJTextPane.htm

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.text.AttributeSet;
import javax.swing.text.Element;
import javax.swing.text.MutableAttributeSet;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;
import javax.swing.text.StyledEditorKit;

public class MNB {
  public MNB() {
    JFrame frame = new JFrame();
    JTextPane textPane = new JTextPane();
    JScrollPane scrollPane = new JScrollPane(textPane);

    JPanel north = new JPanel();

    JMenuBar menu = new JMenuBar();
    JMenu styleMenu = new JMenu();
    styleMenu.setText("Style");

    Action boldAction = new BoldAction();
    boldAction.putValue(Action.NAME, "Bold");
    styleMenu.add(boldAction);

    Action italicAction = new ItalicAction();
    italicAction.putValue(Action.NAME, "Italic");
    styleMenu.add(italicAction);

    Action foregroundAction = new ForegroundAction();
    foregroundAction.putValue(Action.NAME, "Color");
    styleMenu.add(foregroundAction);

    Action formatTextAction = new FontAndSizeAction();
    formatTextAction.putValue(Action.NAME, "Font and Size");
    styleMenu.add(formatTextAction);

    menu.add(styleMenu);

    north.add(menu);
    frame.getContentPane().setLayout(new BorderLayout());
    frame.getContentPane().add(north, BorderLayout.NORTH);
    frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
    frame.setSize(800, 500);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);
  }

  public static void main(String[] args) {
    new MNB();
  }
}
class BoldAction extends StyledEditorKit.StyledTextAction {
  private static final long serialVersionUID = 9174670038684056758L;

  public BoldAction() {
    super("font-bold");
  }

  public String toString() {
    return "Bold";
  }

  public void actionPerformed(ActionEvent e) {
    JEditorPane editor = getEditor(e);
    if (editor != null) {
      StyledEditorKit kit = getStyledEditorKit(editor);
      MutableAttributeSet attr = kit.getInputAttributes();
      boolean bold = (StyleConstants.isBold(attr)) ? false : true;
      SimpleAttributeSet sas = new SimpleAttributeSet();
      StyleConstants.setBold(sas, bold);
      setCharacterAttributes(editor, sas, false);

    }
  }
}

class ItalicAction extends StyledEditorKit.StyledTextAction {

  private static final long serialVersionUID = -1428340091100055456L;

  public ItalicAction() {
    super("font-italic");
  }

  public String toString() {
    return "Italic";
  }

  public void actionPerformed(ActionEvent e) {
    JEditorPane editor = getEditor(e);
    if (editor != null) {
      StyledEditorKit kit = getStyledEditorKit(editor);
      MutableAttributeSet attr = kit.getInputAttributes();
      boolean italic = (StyleConstants.isItalic(attr)) ? false : true;
      SimpleAttributeSet sas = new SimpleAttributeSet();
      StyleConstants.setItalic(sas, italic);
      setCharacterAttributes(editor, sas, false);
    }
  }
}
class ForegroundAction extends StyledEditorKit.StyledTextAction {

  private static final long serialVersionUID = 6384632651737400352L;

  JColorChooser colorChooser = new JColorChooser();

  JDialog dialog = new JDialog();

  boolean noChange = false;

  boolean cancelled = false;

  public ForegroundAction() {
    super("foreground");

  }

  public void actionPerformed(ActionEvent e) {
    JTextPane editor = (JTextPane) getEditor(e);

    if (editor == null) {
      JOptionPane.showMessageDialog(null,
          "You need to select the editor pane before you can change the color.", "Error",
          JOptionPane.ERROR_MESSAGE);
      return;
    }
    int p0 = editor.getSelectionStart();
    StyledDocument doc = getStyledDocument(editor);
    Element paragraph = doc.getCharacterElement(p0);
    AttributeSet as = paragraph.getAttributes();
    fg = StyleConstants.getForeground(as);
    if (fg == null) {
      fg = Color.BLACK;
    }
    colorChooser.setColor(fg);

    JButton accept = new JButton("OK");
    accept.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        fg = colorChooser.getColor();
        dialog.dispose();
      }
    });

    JButton cancel = new JButton("Cancel");
    cancel.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        cancelled = true;
        dialog.dispose();
      }
    });

    JButton none = new JButton("None");
    none.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        noChange = true;
        dialog.dispose();
      }
    });

    JPanel buttons = new JPanel();
    buttons.add(accept);
    buttons.add(none);
    buttons.add(cancel);

    dialog.getContentPane().setLayout(new BorderLayout());
    dialog.getContentPane().add(colorChooser, BorderLayout.CENTER);
    dialog.getContentPane().add(buttons, BorderLayout.SOUTH);
    dialog.setModal(true);
    dialog.pack();
    dialog.setVisible(true);

    if (!cancelled) {

      MutableAttributeSet attr = null;
      if (editor != null) {
        if (fg != null && !noChange) {
          attr = new SimpleAttributeSet();
          StyleConstants.setForeground(attr, fg);
          setCharacterAttributes(editor, attr, false);
        }
      }
    }// end if color != null
    noChange = false;
    cancelled = false;
  }

  private Color fg;
}

class FontAndSizeAction extends StyledEditorKit.StyledTextAction {

  private static final long serialVersionUID = 584531387732416339L;

  private String family;

  private float fontSize;

  JDialog formatText;

  private boolean accept = false;

  JComboBox fontFamilyChooser;

  JComboBox fontSizeChooser;

  public FontAndSizeAction() {
    super("Font and Size");
  }

  public String toString() {
    return "Font and Size";
  }

  public void actionPerformed(ActionEvent e) {
    JTextPane editor = (JTextPane) getEditor(e);
    int p0 = editor.getSelectionStart();
    StyledDocument doc = getStyledDocument(editor);
    Element paragraph = doc.getCharacterElement(p0);
    AttributeSet as = paragraph.getAttributes();

    family = StyleConstants.getFontFamily(as);
    fontSize = StyleConstants.getFontSize(as);

    formatText = new JDialog(new JFrame(), "Font and Size", true);
    formatText.getContentPane().setLayout(new BorderLayout());

    JPanel choosers = new JPanel();
    choosers.setLayout(new GridLayout(2, 1));

    JPanel fontFamilyPanel = new JPanel();
    fontFamilyPanel.add(new JLabel("Font"));

    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    String[] fontNames = ge.getAvailableFontFamilyNames();

    fontFamilyChooser = new JComboBox();
    for (int i = 0; i < fontNames.length; i++) {
      fontFamilyChooser.addItem(fontNames[i]);
    }
    fontFamilyChooser.setSelectedItem(family);
    fontFamilyPanel.add(fontFamilyChooser);
    choosers.add(fontFamilyPanel);

    JPanel fontSizePanel = new JPanel();
    fontSizePanel.add(new JLabel("Size"));
    fontSizeChooser = new JComboBox();
    fontSizeChooser.setEditable(true);
    fontSizeChooser.addItem(new Float(4));
    fontSizeChooser.addItem(new Float(8));
    fontSizeChooser.addItem(new Float(12));
    fontSizeChooser.addItem(new Float(16));
    fontSizeChooser.addItem(new Float(20));
    fontSizeChooser.addItem(new Float(24));
    fontSizeChooser.setSelectedItem(new Float(fontSize));
    fontSizePanel.add(fontSizeChooser);
    choosers.add(fontSizePanel);

    JButton ok = new JButton("OK");
    ok.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        accept = true;
        formatText.dispose();
        family = (String) fontFamilyChooser.getSelectedItem();
        fontSize = Float.parseFloat(fontSizeChooser.getSelectedItem().toString());
      }
    });

    JButton cancel = new JButton("Cancel");
    cancel.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        formatText.dispose();
      }
    });

    JPanel buttons = new JPanel();
    buttons.add(ok);
    buttons.add(cancel);
    formatText.getContentPane().add(choosers, BorderLayout.CENTER);
    formatText.getContentPane().add(buttons, BorderLayout.SOUTH);
    formatText.pack();
    formatText.setVisible(true);

    MutableAttributeSet attr = null;
    if (editor != null && accept) {
      attr = new SimpleAttributeSet();
      StyleConstants.setFontFamily(attr, family);
      StyleConstants.setFontSize(attr, (int) fontSize);
      setCharacterAttributes(editor, attr, false);
    }

  }
}