import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;

import java.awt.*; 
import javax.swing.*;
import java.awt.event.*; 
import javax.swing.event.*;
import javax.swing.border.*;
import javax.swing.filechooser.FileFilter; 
import javax.swing.filechooser.FileView; 
import java.io.*; 
import java.util.*; 

class ViewSourceFrame extends JFrame implements ActionListener{ 
    JPanel contentPane; 
    JPanel panel1 = new JPanel (); 
    JPanel panel2 = new JPanel (); 
    Border border1; 

    JButton closebutton = new JButton ();
    JButton savebutton = new JButton ();
    JScrollPane jScrollPanel = new JScrollPane (); 
    TextAreaMenu jTextArea1 = new TextAreaMenu (); 

    String htmlSource; 


	public ViewSourceFrame (String htmlSource) {
        
        this.htmlSource = htmlSource; 
        enableEvents (AWTEvent.WINDOW_EVENT_MASK); 
        setSize (new Dimension (600,500)); 
        setTitle ("source"); 
        setDefaultCloseOperation (WindowConstants.DISPOSE_ON_CLOSE); 
        
        contentPane = (JPanel)getContentPane (); 
        contentPane.setLayout (new BorderLayout()); 
        
        panel2.setLayout (new FlowLayout()); 
        
        savebutton.setText ("save"); 
        closebutton.setText ("quit");
        
		closebutton.addActionListener(this);
        savebutton.addActionListener(this);
        
        jScrollPanel.getViewport ().add (jTextArea1,null); 
        border1 = BorderFactory.createEmptyBorder (4,4,4,4); 
        panel1.setLayout (new BorderLayout()); 
        panel1.setBorder (border1); 
        panel1.add (jScrollPanel,BorderLayout.CENTER); 
        contentPane.add (panel1,BorderLayout.CENTER); 
        
        panel2.add (savebutton); 
        panel2.add (closebutton); 
        
		contentPane.add (panel2,BorderLayout.SOUTH); 
        this.jTextArea1.setEditable (true); 
        this.jTextArea1.setText (this.htmlSource); 
       
		this.jTextArea1.setCaretPosition (0); 
    } 
    
    /**

	*/
	//.......
	class TextAreaMenu extends JTextArea implements MouseListener {

  private static final long serialVersionUID = -2308615404205560110L;

  private JPopupMenu pop = null; // 彈出菜單

  private JMenuItem copy = null, paste = null, cut = null; // 三個功能菜單

  public TextAreaMenu() {
   super();
   init();
  }

  private void init() {
   this.addMouseListener(this);
   pop = new JPopupMenu();
   pop.add(copy = new JMenuItem("COPY"));
   pop.add(paste = new JMenuItem("PASTE"));
   pop.add(cut = new JMenuItem("CUT"));
   copy.setAccelerator(KeyStroke.getKeyStroke('C', InputEvent.CTRL_MASK));
   paste.setAccelerator(KeyStroke.getKeyStroke('V', InputEvent.CTRL_MASK));
   cut.setAccelerator(KeyStroke.getKeyStroke('X', InputEvent.CTRL_MASK));
   copy.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
     action(e);
    }
   });
   paste.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
     action(e);
    }
   });
   cut.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
     action(e);
    }
   });
   this.add(pop);
  }

  /**
   * 菜單動作
   * @param e
   */
  public void action(ActionEvent e) {
   String str = e.getActionCommand();
   if (str.equals(copy.getText())) { // 復制
    this.copy();
   } else if (str.equals(paste.getText())) { // 粘貼
    this.paste();
   } else if (str.equals(cut.getText())) { // 剪切
    this.cut();
   }
  }

  public JPopupMenu getPop() {
   return pop;
  }

  public void setPop(JPopupMenu pop) {
   this.pop = pop;
  }

  /**
   * 剪切板中是否有文本數據可供粘貼
   * 
   * @return true為有文本數據
   */
  public boolean isClipboardString() {
   boolean b = false;
   Clipboard clipboard = this.getToolkit().getSystemClipboard();
   Transferable content = clipboard.getContents(this);
   try {
    if (content.getTransferData(DataFlavor.stringFlavor) instanceof String) {
     b = true;
    }
   } catch (Exception e) {
   }
   return b;
  }

  /**
   * 文本組件中是否具備復制的條件
   * 
   * @return true為具備
   */
  public boolean isCanCopy() {
   boolean b = false;
   int start = this.getSelectionStart();
   int end = this.getSelectionEnd();
   if (start != end)
    b = true;
   return b;
  }

  public void mouseClicked(MouseEvent e) {
  }

  public void mouseEntered(MouseEvent e) {
  }

  public void mouseExited(MouseEvent e) {
  }

  public void mousePressed(MouseEvent e) {
   if (e.getButton() == MouseEvent.BUTTON3) {
    copy.setEnabled(isCanCopy());
    paste.setEnabled(isClipboardString());
    cut.setEnabled(isCanCopy());
    pop.show(this, e.getX(), e.getY());
   }
  }

  public void mouseReleased(MouseEvent e) {
  }

 }


	
	
	//........
	public void actionPerformed(ActionEvent e) {
        String url = "";
        if (e.getSource() == closebutton){
            dispose();
        }
        else if(e.getSource() == savebutton){
            JFileChooser fc=new JFileChooser();
            int returnVal=fc.showSaveDialog(ViewSourceFrame.this);
            File saveFile=fc.getSelectedFile();
            try {
                FileWriter writeOut = new FileWriter(saveFile);
                writeOut.write(jTextArea1.getText());
                writeOut.close();
            }
            catch (IOException ex) {
                System.out.println("save faild");
            }
        }
    }
}