//morse.java
//ab
//output a textfile as morse code
//inputs from file
// need to add datatransfer, speed adjust, pitch adjust?
// different length dit and dah files

import java.applet.Applet;
import java.util.*;
import java.awt.*;
import java.io.*;
import java.net.*;

public class morse extends Applet implements Runnable {
int wpm=15;//not yet used
URL dit,dah;

static String[] codedata={"a.-","b-...","c-.-.","d-..","e.","f..-.",
"g--.","h....","i..","j.---","k-.-","l.-..","m--","n-.","o---","p.--.",
"q--.-","r.-.","s...","t-","u..-","v...-","w.--","x-..-","y-.--",
"z--..","0-----","1.----","2..---","3...--","4....-","5.....",
"6-....","7--...","8---..","9----.",
",--..--","+.-.-.","*...-.-","/-..-.","=","?..--..","..-.-.-",
"  ","\n ","\r ","\t "};//etc

static Hashtable codehash=new Hashtable();
{for (int i=0;i<codedata.length;i++) 
  codehash.put(codedata[i].substring(0,1),codedata[i].substring(1));}

String code(String letter){//code for a letter
  if (!codehash.containsKey(letter))
    return code("?");
  return (String)codehash.get(letter);}


void output(){//output some code for message
     beepfor(code(message.substring(current,current+1)));
     letterpause();}

void beepfor(String snippet){
    if (snippet.equals(" "))
       spacepause();
    else{
	char c;
	for (int i=0;i<snippet.length();i++){
            c=snippet.charAt(i);
	    if (c=='.')
		dodit();
	    else if (c=='-') 
		dodah();
	    else System.out.println("booboo:"+c);//should be an exception
	    ditdahpause(); }}}


void letterpause(){ pause(5);}

void spacepause(){ pause(8);}//needs to be adjusted for wpm

void ditdahpause(){ pause(1); }

void pause(int units){
        try {Thread.currentThread().sleep(units*speed);} 
        catch (InterruptedException e){};}

void dodit(){
   play(dit); 
   pause(1);} //stupid asynchronous calls

void dodah(){
  play(dah); 
   pause(3);} //stupid asynchronous calls

//it depends on how ambitious i get.  if i figure out how to generate
//au files in the program, a simple sine wave can produce any
//sound output. adjustable pitch. i need to find out how to do it.
//digital sound synthesis. whole worlds of possibility

//-------------------------------------------
//stuff copied from filewindow:
   String filename;
    URL thisurl;
    String message;
    int maxchars;
    int current;  // index of character output
    Thread cotton;
    int speed;
    FontMetrics fm;
    Dimension size;  //height and width

   public void advance() {
        if (current==maxchars)
              current=0;
        else current=current+1;
        repaint();}
 


   public void paint(Graphics g) {   
       g.clearRect(0,0,size.width,size.height);
       //just the current 20 chars
       g.drawString(message.substring(
		Math.max(0,current-20),current+1),1,size.height-1); }


    public void start() {      
        if (cotton==null) cotton = new Thread(this);
        cotton.start(); }

    public void stop() {
        cotton.stop();}

    public void run() {
      while (true) {
        output();
	advance();}}

    public boolean mouseEnter(Event eve, int x, int y) {
	try {getAppletContext().showStatus("Morse code:click to start/stop");}
	  catch  (Exception e) {System.out.println("Status error");}
	return true; }


    public boolean mouseDown(Event eve,int x, int y) {
       if (cotton!=null)
          stop();
       else start();
	return true;
	}

  private void debug(String s){
       System.out.println(s);}

    private String glopFile(InputStream f) { //read a line from the stream fitting on our line,  null if end
	StringBuffer sb=new StringBuffer("");
	String s;
	int c=1;
	while (c>=0){

             try {c=f.read();}
               catch (IOException e) {
                System.out.println("Read error. :"+(char)c+" "); 
		c=-2; 
		break;}
        //           System.out.print((char)c+" "+c+",");

            if (c=='<') {  //skip blocks of <>  *****warning! can't do single < correctly
              try { while(f.read() !='>'); }
                  catch (IOException e) {System.out.print("skipping <>"); c=-2;} 
	      continue;}
	    sb.append((char)c);}
    s=sb.toString().toLowerCase();
    //remove duplicate spaces
    sb.setLength(0);
    StringTokenizer st=new StringTokenizer(s," \t\n\r");
    while (st.hasMoreTokens()) sb.append(st.nextToken()+" ");

    return sb.toString();
}
 

    public void init() { 
      InputStream f;
      int i=0;
      String fontname;
      Font font;

	try {
	  dit=new URL(getDocumentBase(),"dit.au");
	  dah=new URL(getDocumentBase(),"dah.au");
	  getAudioClip(dit);
	  getAudioClip(dah);}
	catch (Exception e) {
	  System.out.println("Trouble with audio clips"+e);}

      size=size();

      setBackground(new Color(180,180,255));
      filename=getParameter("fname");
 //     if ((fontname=getParameter("font"))==null)  fontname="TimesRoman";
 //     font = new Font(fontname, Font.BOLD, size.height-1);
 //     setFont(font);
 //     fm=getFontMetrics(font);
      
      String att = getParameter("speed");
      if (att != null) wpm=Integer.parseInt(att);
	//speed=60000/5/4/wpm;//calculate dit length for wpm
        speed=100;
      try {thisurl=new URL(getDocumentBase(),filename);
 	f=thisurl.openStream();}
      catch (IOException e) {System.out.println("File not available");return;}
  
	message=glopFile(f);
        debug("message is:"+message);
	maxchars=message.length();
	//read  file

	try {f.close();}  catch (IOException e) {System.out.print("can't close()");}}
}