import java.awt.*;
import java.awt.event.*;
import java.awt.font.*;
import javax.swing.*;
import java.io.*;

class FileIO extends JFrame
		implements ActionListener {
  JMenuItem savetext, gettext, cleardisplay;
  JLabel messlab1;
  JTextArea disptext;
  static FileIO frame;
  Painter panel1paint;

  FileIO() { //Begin Constructor
    JMenuBar menubar = new JMenuBar(); 
    setJMenuBar(menubar); 
    JMenu filemenu = new JMenu("File", false);
    menubar.add(filemenu);
    savetext = new JMenuItem("Save Text to File");
    gettext = new JMenuItem("Get Text from File");
    cleardisplay = new JMenuItem("Clear Display");
    filemenu.add(savetext);
    filemenu.add(gettext);
    filemenu.add(cleardisplay);

    getContentPane().setLayout(new GridLayout(1,2));
    JPanel panel1 = new JPanel();
    panel1.setLayout(new BorderLayout());
    panel1.setBackground(Color.white);
    getContentPane().add(panel1);

    JPanel panel2 = new JPanel();
    panel2.setLayout(new FlowLayout());
    panel2.setBackground(Color.white);
    getContentPane().add(panel2);

    //Create message area from color and text string
    panel1paint = new Painter(Color.black, "Ready");
    Dimension dimension = new Dimension();
    dimension.setSize(200, 25);
    panel1paint.setSize(dimension);
    //Add message area to Panel 1
    panel1.add(BorderLayout.CENTER, panel1paint);

    //Add message label to Panel 1
    messlab1 = new JLabel();
    panel1.add(BorderLayout.SOUTH, messlab1);

    //Create text area for panel 2  
    disptext = new JTextArea();
    disptext.setFont(new Font("Serif", 
	Font.ITALIC, 12));
    disptext.setLineWrap(true); 
    disptext.setWrapStyleWord(true);
    disptext.setEditable(true);
    JScrollPane areaScrollPane = new 
	JScrollPane(disptext);
    areaScrollPane.setVerticalScrollBarPolicy(
        JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
    areaScrollPane.setPreferredSize(
	new Dimension(200, 175));
    areaScrollPane.setBorder(
	BorderFactory.createTitledBorder("Enter or Edit Text:"));
    panel2.add(areaScrollPane);

    //This class listens for menu item events
    savetext.addActionListener(this);
    gettext.addActionListener(this);
    cleardisplay.addActionListener(this);
  } //End Constructor

  protected void clearDisplay(){
    messlab1.setText("");
    panel1paint.setColor(Color.black);
    panel1paint.setText("Ready");
    panel1paint.repaint();
    disptext.setText("");
  }

  public void actionPerformed(ActionEvent event){
    Object source = event.getSource();
    String returned = null;
    FileInputStream in=null;
    FileOutputStream out=null;
    
    if(source == cleardisplay) {
      clearDisplay();
    }

    if(source == savetext) {
      returned = disptext.getText(); 
      if(returned != null) {
        //Write to file
        try {
          byte b[] = returned.getBytes();
          String outputFileName = 
		System.getProperty("user.home",
                File.separatorChar + "home" +
                File.separatorChar + "zelda") +
                File.separatorChar + "text.txt";
          out = new FileOutputStream(outputFileName);
          out.write(b);
          panel1paint.setText(
		" Text successfully saved.");
          panel1paint.setColor(Color.blue);
          panel1paint.repaint();
          disptext.setText(returned);
        } catch(java.io.IOException e) {
          messlab1.setText("Cannot write to text.txt");
        } finally {
          if(out != null) {
            try {
              out.close();
            } catch(java.io.IOException e) {
              messlab1.setText("Cannot close file");
            }
          }
        }
      } else {
        messlab1.setText("No Text to Save");
      }
    }

    if(source == gettext) {
     //Read from file
      try{
        String inputFileName = System.getProperty(
		"user.home",
                File.separatorChar + "home" +
                File.separatorChar + "zelda") +
                File.separatorChar + "text.txt";
        File inputFile = new File(inputFileName);
        in = new FileInputStream(inputFile);
        byte bt[] = new byte[(int)inputFile.length()];
        in.read(bt);
        String s = new String(bt);
        disptext.setText(s);
        panel1paint.setText(" Text read from file: ");
        panel1paint.setColor(Color.blue);
        panel1paint.repaint();
      } catch(java.io.IOException e) {
        messlab1.setText("Cannot read from text.txt");
      } finally {
        if(in != null) {
          try {
            in.close();
          } catch(java.io.IOException e) {
            messlab1.setText("Cannot close file");
          }
        }
      }
    }
  }

  public static void main(String[] args){
    frame = new FileIO();
    frame.setTitle("Simple Text Editor");
    WindowListener l = new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    };
    frame.addWindowListener(l);
    frame.pack();
    frame.setVisible(true);
  }
}

class Painter extends JPanel {
  Color c;
  String s;

  Painter(Color c, String s) {
    this.s = s;
    this.c = c;
  }
  protected void setColor(Color c) {
    this.c = c;
  }
  protected Color getColor() {
    return this.c;
  }
  protected void setText(String s) {
     this.s = s;
  }
  protected String getText() {
     return this.s;
  }
  public void paintComponent(Graphics g) {
    Graphics2D g2;
    g2 = (Graphics2D) g;

    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON);
    g2.setRenderingHint(RenderingHints.KEY_RENDERING,
                        RenderingHints.VALUE_RENDER_QUALITY);
    //Make background white
    g2.setColor(Color.white);
    g2.fillRect(0, 0, getSize().width -1, getSize().height -1);
    //Set font rendering context and font 
    FontRenderContext frc = g2.getFontRenderContext();
    Font f = new Font("Helvetica", Font.PLAIN, 15);
    //Create styled text from font and string
    TextLayout tl = new TextLayout(s, f, frc);
    //Get the size of the drawing area 
    Dimension theSize = getSize();
    //Set the 2D graphics context color for drawing the text
    g2.setColor(c);
    //Draw the text into the drawing area
    tl.draw(g2, theSize.width/30, theSize.height/2);
    //Put a blue box around the styled text
    //unless the text string is "Ready"
    if(this.s != "Ready") {
      g2.drawRect(0, 0, getSize().width -1, getSize().height -1);
    }
  }
}