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


/**
 * Sample application using Frame.
 *
 * @author 
 * @version 1.00 07/04/19
 */
public class DictionaryFrame extends Frame implements MouseListener,KeyListener,TextListener{
     ////////////////////////////////////////////////
     //定義區
     //////////////////////////////////////////////////
     final int WORDCOUNT = 57510;//總單詞數
     final String Info = "本程序是此次Java小作業之一 英漢字典\n操作方法:\n在上面的輸入框中輸入要查的單詞,若查到,此處顯示解釋,且右邊List控件指到該詞.\n若沒找到,此處顯示可能的單詞,右邊指向和其匹配最靠近的單詞,按Enter鍵獲得最靠近的單詞;\n在輸入句子的情況下(存在兩個以上空格),輸完后,按下回車鍵,本程序將會一一分析其中的單詞\nCoded by 張天明 041221120\n";
     
  	 //Label l = new Label("輸入:");
  	 
     TextField  InputBox = new TextField("");//輸入框
     TextArea  OutputBox = new TextArea(Info);//輸出框
     JList lst;//List框
     
     String LastWord = new String ("");//保存前一次輸入的詞;
     
     int FirstPoint = 0;//以某一個字母開頭的單詞的起始索引
     int RecentPoint = 0;//當前字母的位置
     int NowPoint = -1;//保存前一次查出的字母的位置
     int NextPoint = 0;//以某一個字母開頭的單詞的結束索引
     //文件中指針
     
     String []Word = new String[WORDCOUNT];
	 int []off = new int [WORDCOUNT];
     int []len = new int [WORDCOUNT];//將索引中的單詞及其偏移,長度保存在數組中
     
     //boolean ChangedList = false;
     boolean ChangedText = false;//防止List框和輸入框相互影響
     boolean Sentence = false;
     
     ///////////////////////////////////////////////
     //定義區
     /////////////////////////////////////////////////
     
     
     public DictionaryFrame() throws Exception
     {
     	setTitle("Dictionary");
		setSize(new Dimension(600, 400));//初始化界面
		//this.setLayout(BorderLayout);

        Font f = new Font("Tahoma",0,13);
        setFont(f);
        
        InIdx();//讀入索引
        
        lst = new JList(Word);//構建List
        
       
		this.add(InputBox,BorderLayout.NORTH); 
		this.add(OutputBox,BorderLayout.EAST); 
        this.add(new JScrollPane(lst),BorderLayout.CENTER);  
        
        //將幾個控件排好
        
        
        InputBox.addTextListener(this);//監聽輸入框
        InputBox.addKeyListener(this);
        lst.addMouseListener(this);//監聽List框


        this.addWindowListener
        (
            new WindowAdapter() {
                public void windowClosing(WindowEvent e) {
                    DictionaryFrame.this.windowClosed();
                }
            }
        );  
    }
    
     /**
     * Invoked when a key has been typed.
     * See the class description for {@link KeyEvent} for a definition of 
     * a key typed event.
     */
    public void keyTyped(KeyEvent e)
    {
    	////////////////////////////////////////////////////////////////
    	////對回車鍵進行判斷.
    	if(e.getSource()==InputBox&&e.getKeyChar() =='\n')
 	 	{
 	 		if(Sentence)//若是句子，分析;
 	 		{
 	 		
 	 		try
 	 		{
 	 		int t1= RecentPoint;
			int t2 = NowPoint;
			int t3 = NextPoint;//存入現在指針位置;
			int t4 = FirstPoint;
		
			NowPoint = -1;
		
 	 		String out = new String ("該句子由以下單詞組成:\n");
 	 		
 	 		String s = InputBox.getText();
 	 		int lenth = s.length();
 	 		String w[]  = new String [100];
 	 		int n = 0;
 	 		byte a[] = s.getBytes();
 	 		byte b[] = new byte [100] ;
 	 		int l = 0;
 	 		
 	 		
 	 		for(int i =0;i<lenth;i++)//將單詞一一分開
 	 		{
 	 			if(a[i] == (byte)' ' ) 
 	 			{
 	 				if(l!=0)
 	 				{
 	 					w[n] = new String(b,0,l);
 	 					n++;
 	 					l =0;
 	 				}
 	 			
 	 			}
 	 			else 
 	 			{
 	 				b[l] = a[i];
 	 				l++;
 	 			}
 	 		}
 	 		if(l!=0)
 	 			w[n] = new String(b,0,l);
 	 		else n--;
 	 		
 	 		for(int i=0;i<=n;i++)//顯示單詞
 	 		{
 	 			out+= new String("第 "+(i+1)+" 個單詞: "+w[i]+"\n");
 	 		}
 	 		
 	 		String divide = "\n\n-------------------------我是分割線-------------------------\n\n";
 	 		
 	 			out+=divide;
 	 		
 	 		
 	 		//String Meaning[] = new String [n+1];
 	 		
 	 		for(int i=0;i<=n;i++)
 	 		{
 	 			if(isExist(w[i]))
 	 			{
 	 					out+= new String(w[i]+" 解釋如下:"+"\r\n");
 	 					out+= getMeaning(off[RecentPoint],len[RecentPoint]);
 	 					out+= divide;
 	 				
 	 			}
 	 			else
 	 			{
 	 					out+= new String (w[i]+" 不存在!"+divide);
 	 				
 	 			}
 	 		}
 	 		/*
 	 		for(int i=0;i<=n;i++)
 	 		{
 	 			OutputBox.append(Meaning[i]);
 	 		}
 	 		*/
 	 		OutputBox.setText(out);
 	 		
 	 		RecentPoint =t1;
			NowPoint =t2;
			NextPoint = t3;//恢復指針
			FirstPoint = t4;
 	 		
 	 		
 	 		}
 	 		
 	 			 catch(Exception ex)
			 	{
					System.err.println(ex);
				 }
			}
			else
			{
				//若不是句子，獲得待選的詞;
				InputBox.setText(Word[lst.getSelectedIndex()]);
			}
 	 		
 	 		
 	 		
 	 		
 	 	}
    
    	
    }

    /**
     * Invoked when a key has been pressed. 
     * See the class description for {@link KeyEvent} for a definition of 
     * a key pressed event.
     */
    public void keyPressed(KeyEvent e)
    {
    	
    }

    /**
     * Invoked when a key has been released.
     * See the class description for {@link KeyEvent} for a definition of 
     * a key released event.
     */
    public void keyReleased(KeyEvent e)
    {
    	
    }
       
    
     /**
     * Invoked when the mouse button has been clicked (pressed
     * and released) on a component.
     */
     public void mouseClicked(MouseEvent e)
     {
     	//valueChanged(e);
     	
     }

    /**
     * Invoked when a mouse button has been pressed on a component.
     */
    public void mousePressed(MouseEvent e)
    {
    	
    }

    /**
     * Invoked when a mouse button has been released on a component.
     */
    public void mouseReleased(MouseEvent e)
    {
    	if(e.getSource()==lst)//確定消息來源為List框,則執行ListChanged().
 		{
 		ListChanged();
 		}
    	
    }

    /**
     * Invoked when the mouse enters a component.
     */
    public void mouseEntered(MouseEvent e)
    {
    	
    }

    /**
     * Invoked when the mouse exits a component.
     */
    public void mouseExited(MouseEvent e) 
    {
    	
    }
    
    public   void   textValueChanged(TextEvent e)
  	{  
		if(e.getSource()==InputBox)
 	 	{
    	
 	 		if(ChangedText)
  			{
  				ChangedText = false;
  				return;
  			 }//防止List框和輸入框相互影響

 	 		 	try
 				{	
 	 			String W = InputBox.getText();//獲得輸入框結果
 	 			
 	 			///////////////////////////////////////////
 	 			////以下這段用于判斷輸入的是否是句子.特點是有兩個以上的空格
 	 			int blank = 0;
 	 			int length = W.length();
 	 			for(int i = 0;i<length;i++)
 	 			{
 	 				if(W.charAt(i) == ' ') blank ++;
 	 			}
 	 			if (blank >=2)
 	 			{
 	 				OutputBox.setText("輸入的應該是句子,不再進行單詞判斷!");
 	 				Sentence = true;
 	 				return ;
 	 				
 	 			}
 	 			///////////////////////////////////////////////
 	 			
 	 			
 	 			
 	 			if(W.length() == 0)//若長度為0,重新初始化
 	 			{
 	 				RecentPoint = 0;
 	 				lst.setSelectedIndex(0);
 	 				lst.ensureIndexIsVisible(0);
 	 				OutputBox.setText(Info) ;
 	 				LastWord = W;
 	 				return ;	

 	 			}
 	 			else
				//本來我是保存RecentPoint以加速查找的,但是發現對速度影響不大,所以去掉了
 	 			//if(W.length() == 1||W.length() < LastWord.length()||W.charAt(0)!=LastWord.charAt(0))//長度為1或比前一次小,重新獲得初始偏移
 	 			{
 	 				RecentPoint = getFirst(W);
 	 				
 	 			}
 	 			
 	 			if(getWord(W)) //在前一次查詢的基礎上查這次的詞
 	 				OutputBox.setText(getMeaning(off[RecentPoint],len[RecentPoint]));//查到輸出結果
 	 			else // System.out.print(RecentPoint);
 	 				OutputBox.setText(getAlike(W)) ;//未查到輸出可能的錯誤單詞	
 	 			
				if(NowPoint != RecentPoint)//如果偏移位置未變,即LIst框指向位置不變
				{
				
 	 			lst.setSelectedIndex(RecentPoint);
 	 			lst.ensureIndexIsVisible(WORDCOUNT-1);
 	 			lst.ensureIndexIsVisible(RecentPoint);//先將位置放在最后,在放在當前單詞上,可以讓其排在第一位
 				NowPoint = RecentPoint;
 				}
 	 			LastWord = W;//報存單詞
 	 			return ;
 
 			 }
 			 catch(Exception ex)