displayformatters.java

这是一个基于java编写的torrent的P2P源码

					((n % (1000L * 1000L * 1000L)) / (1000L * 1000L * 100L))+
					units_base10[UNIT_GB];
			
		}else if (n < 1000L * 1000L * 1000L * 1000L* 1000L){
			
			return (n / (1000L * 1000L * 1000L* 1000L)) + "." +
					((n % (1000L * 1000L * 1000L* 1000L)) / (1000L * 1000L * 1000L* 100L))+
					units_base10[UNIT_TB];
		}else{
			
			return Formats_units_alot;
		}
	}

	public static String
	formatByteCountToBase10KBEtcPerSec(
			long		n )
	{
		return( formatByteCountToBase10KBEtc(n) + per_sec );
	}

   public static String 
   formatETA(long eta) 
   {
     if (eta == 0) return PeerManager_status_finished;
     if (eta == -1) return "";
     if (eta > 0) return TimeFormatter.format(eta);

     return PeerManager_status_finishedin + " " + TimeFormatter.format(eta * -1);
   }


	public static String
	formatDownloaded(
		DownloadManagerStats	stats )
	{
		long	total_discarded = stats.getDiscarded();
		long	total_received 	= stats.getTotalGoodDataBytesReceived();

		if(total_discarded == 0){

			return formatByteCountToKiBEtc(total_received);

		}else{

			return formatByteCountToKiBEtc(total_received) + " ( " + 
					DisplayFormatters.formatByteCountToKiBEtc(total_discarded) + " " + 
					discarded + " )";
		}
	}

	public static String
	formatHashFails(
		DownloadManager		download_manager )
	{
		TOTorrent	torrent = download_manager.getTorrent();
		
		if ( torrent != null ){
			
			long bad = download_manager.getStats().getHashFailBytes();
	
					// size can exceed int so ensure longs used in multiplication
	
			long count = bad / (long)torrent.getPieceLength();
	
			String result = count + " ( " + formatByteCountToKiBEtc(bad) + " )";
	
			return result;
	  	}

  		return "";
	}

	public static String
	formatDownloadStatus(
		DownloadManager		manager )
	{
		int state = manager.getState();

		String	tmp = "";

		switch (state) {
		  case DownloadManager.STATE_WAITING :
			tmp = ManagerItem_waiting;
			break;
		  case DownloadManager.STATE_INITIALIZING :
			  tmp = ManagerItem_initializing;
			  break;
		  case DownloadManager.STATE_INITIALIZED :
			  tmp = ManagerItem_initializing;
			  break;
		  case DownloadManager.STATE_ALLOCATING :
			tmp = ManagerItem_allocating;
			break;
		  case DownloadManager.STATE_CHECKING :
			tmp = ManagerItem_checking + ": " + formatPercentFromThousands(manager.getStats().getCompleted());
			break;
		  case DownloadManager.STATE_FINISHING :
		    tmp = ManagerItem_finishing;
			 break;
		  case DownloadManager.STATE_READY :
			tmp = ManagerItem_ready;
			break;
		  case DownloadManager.STATE_DOWNLOADING :
			tmp = ManagerItem_downloading;
			break;
		  case DownloadManager.STATE_SEEDING :
         
			  DiskManager diskManager = manager.getDiskManager();
			  
			  if ((diskManager != null) && diskManager.getCompleteRecheckStatus() != -1) {
				  
				  int	done = diskManager.getCompleteRecheckStatus();
				  
				  if ( done == -1 ){
					  done = 1000;
				  }
				  
				  tmp = ManagerItem_seeding + " + " + ManagerItem_checking + ": " + formatPercentFromThousands( done );
				  
			  }else if(manager.getPeerManager()!= null && manager.getPeerManager().isSuperSeedMode()){
				  tmp = ManagerItem_superseeding;
			  }else{
				  tmp = ManagerItem_seeding;
			  }
			  break;
		case DownloadManager.STATE_STOPPING :
			tmp = ManagerItem_stopping;
			break;
		case DownloadManager.STATE_STOPPED :
			tmp = manager.isPaused()?ManagerItem_paused:ManagerItem_stopped;
			break;
		  case DownloadManager.STATE_QUEUED :
			tmp = ManagerItem_queued;
			break;
		  case DownloadManager.STATE_ERROR :
			tmp = ManagerItem_error + ": " + manager.getErrorDetails();
			break;
			default :
			tmp = String.valueOf(state);
		}

		if (manager.isForceStart() &&
		    (state == DownloadManager.STATE_SEEDING ||
		     state == DownloadManager.STATE_DOWNLOADING))
			tmp = ManagerItem_forced + " " + tmp;
		return( tmp );
	}

	public static String
	formatDownloadStatusDefaultLocale(
		DownloadManager		manager )
	{
		int state = manager.getState();

		String	tmp = "";

		DiskManager	dm = manager.getDiskManager();
		
		switch (state) {
		  case DownloadManager.STATE_WAITING :
			tmp = MessageText.getDefaultLocaleString("ManagerItem.waiting");
			break;
		  case DownloadManager.STATE_INITIALIZING :
			  tmp = MessageText.getDefaultLocaleString("ManagerItem.initializing");
			  break;
		  case DownloadManager.STATE_INITIALIZED :
			  tmp = MessageText.getDefaultLocaleString("ManagerItem.initializing");
			  break;
		  case DownloadManager.STATE_ALLOCATING :
			tmp = MessageText.getDefaultLocaleString("ManagerItem.allocating");
			break;
		  case DownloadManager.STATE_CHECKING :
			tmp = MessageText.getDefaultLocaleString("ManagerItem.checking");
			break;
		  case DownloadManager.STATE_FINISHING :
		    tmp = MessageText.getDefaultLocaleString("ManagerItem.finishing");
		    break;
         case DownloadManager.STATE_READY :
			tmp = MessageText.getDefaultLocaleString("ManagerItem.ready");
			break;
		  case DownloadManager.STATE_DOWNLOADING :
			tmp = MessageText.getDefaultLocaleString("ManagerItem.downloading");
			break;
		  case DownloadManager.STATE_SEEDING :
		  	if (dm != null && dm.getCompleteRecheckStatus() != -1 ) {
		  		int	done = dm.getCompleteRecheckStatus();
				  
				if ( done == -1 ){
				  done = 1000;
				}
				  
		  		tmp = MessageText.getDefaultLocaleString("ManagerItem.seeding") + " + " + 
		  				MessageText.getDefaultLocaleString("ManagerItem.checking") +
		  				": " + formatPercentFromThousands( done );
		  	}
		  	else if(manager.getPeerManager()!= null && manager.getPeerManager().isSuperSeedMode()){

		  		tmp = MessageText.getDefaultLocaleString("ManagerItem.superseeding");
		  	}
		  	else {
		  		tmp = MessageText.getDefaultLocaleString("ManagerItem.seeding");
		  	}
		  	break;
		  case DownloadManager.STATE_STOPPING :
		  	tmp = MessageText.getDefaultLocaleString("ManagerItem.stopping");
		  	break;
		  case DownloadManager.STATE_STOPPED :
			tmp = MessageText.getDefaultLocaleString(manager.isPaused()?"ManagerItem.paused":"ManagerItem.stopped"); 
			break;
		  case DownloadManager.STATE_QUEUED :
			tmp = MessageText.getDefaultLocaleString("ManagerItem.queued"); 
			break;
		  case DownloadManager.STATE_ERROR :
			tmp = MessageText.getDefaultLocaleString("ManagerItem.error").concat(": ").concat(manager.getErrorDetails()); //$NON-NLS-1$ //$NON-NLS-2$
			break;
			default :
			tmp = String.valueOf(state);
		}

		return( tmp );
	}

  public static String formatPercentFromThousands(int thousands) {
 
    return percentage_format.format(thousands / 1000.0);
  }

  public static String formatTimeStamp(long time) {
    StringBuffer sb = new StringBuffer();
    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(time);
    sb.append('[');
    sb.append(formatIntToTwoDigits(calendar.get(Calendar.DAY_OF_MONTH)));
    sb.append('.');
    sb.append(formatIntToTwoDigits(calendar.get(Calendar.MONTH)+1));	// 0 based
    sb.append('.');
    sb.append(calendar.get(Calendar.YEAR));
    sb.append(' ');
    sb.append(formatIntToTwoDigits(calendar.get(Calendar.HOUR_OF_DAY)));
    sb.append(':');
    sb.append(formatIntToTwoDigits(calendar.get(Calendar.MINUTE)));
    sb.append(':');
    sb.append(formatIntToTwoDigits(calendar.get(Calendar.SECOND)));
    sb.append(']');
    return sb.toString();
  }

  public static String formatIntToTwoDigits(int n) {
    return n < 10 ? "0".concat(String.valueOf(n)) : String.valueOf(n);
  }

  public static String
  formatDate(
  	long		date )
  {
  	if ( date == 0 ){
  		return( "" );
  	}

  	SimpleDateFormat temp = new SimpleDateFormat("dd-MMM-yyyy HH:mm:ss");

  	return( temp.format(new Date(date)));
  }

  public static String
  formatDateShort(
    long    date )
  {
    if ( date == 0 ){
      return( "" );
    }

    	// 24 hour clock, no point in including AM/PM

    SimpleDateFormat temp = new SimpleDateFormat("MMM dd, HH:mm");

    return( temp.format(new Date(date)));
  }
  
  public static String
  formatDateNum(
  	long		date )
  {
  	if ( date == 0 ){
  		return( "" );
  	}

  	SimpleDateFormat temp = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

  	return( temp.format(new Date(date)));
  }

  public static String
  formatTime(
    long    time )
  {
    return( TimeFormatter.formatColon( time / 1000 ));
  }

  /**
   * Format a real number to the precision specified.  Does not round the number
   * or truncate trailing zeros.
   * 
   * @param value real number to format
   * @param precision # of digits after the decimal place
   * @return formatted string
   */
  public static String
  formatDecimal(
  	double value, 
  	int		precision)
  {
  	return formatDecimal(value, precision, TRUNCZEROS_NO, ROUND_NO);
  }


  /**
   * Format a real number
   * 
   * @param value real number to format
   * @param precision max # of digits after the decimal place
   * @param bTruncateZeros remove any trailing zeros after decimal place
   * @param bRound Whether the number will be rounded to the precision, or
   *                truncated off.
   * @return formatted string
   */
	public static String
	formatDecimal(
			double value,
			int precision,
			boolean bTruncateZeros,
			boolean bRound)
	{
		if (Double.isNaN(value) || Double.isInfinite(value)) {
			return Constants.INFINITY_STRING;
		}

		double tValue;
		if (bRound) {
			tValue = value;
		} else {
			// NumberFormat rounds, so truncate at precision
			if (precision == 0) {
				tValue = (long) value;
			} else {
				double shift = Math.pow(10, precision);
				tValue = ((long) (value * shift)) / shift;
			}
		}

		int cache_index = (precision << 2) + ((bTruncateZeros ? 1 : 0) << 1)
				+ (bRound ? 1 : 0);

		NumberFormat nf = null;

		if (cache_index < cached_number_formats.length) {
			nf = cached_number_formats[cache_index];
		}

		if (nf == null) {
			nf = NumberFormat.getNumberInstance();
			nf.setGroupingUsed(false); // no commas
			if (!bTruncateZeros) {
				nf.setMinimumFractionDigits(precision);
			}
			if (bRound) {
				nf.setMaximumFractionDigits(precision);
			}

			if (cache_index < cached_number_formats.length) {
				cached_number_formats[cache_index] = nf;
			}
		}

		return nf.format(tValue);
	}
  
  		/**
  		 * Attempts vaguely smart string truncation by searching for largest token and truncating that
  		 * @param str
  		 * @param width
  		 * @return
  		 */
  
  	public static String
	truncateString(
		String	str,
		int		width )
  	{
  		int	excess = str.length() - width;
  		
  		if ( excess <= 0 ){
  			
  			return( str );
  		}
  		
  		excess += 3;	// for ...
  		
  		int	token_start = -1;
  		int	max_len		= 0;
  		int	max_start	= 0;
  		
  		for (int i=0;i<str.length();i++){
  			
  			char	c = str.charAt(i);
  			
  			if ( Character.isLetterOrDigit( c ) || c == '-' || c == '~' ){
  				
  				if ( token_start == -1 ){
  					
  					token_start	= i;
  					
  				}else{
  					
  					int	len = i - token_start;
  					
  					if ( len > max_len ){
  						
  						max_len		= len;
  						max_start	= token_start;
  					}
  				}
  			}else{
  				
  				token_start = -1;
  			}
  		}
  		
  		if ( max_len >= excess ){
  			 			
  			int	trim_point = max_start + max_len;
  			
  			return( str.substring( 0, trim_point - excess ) + "..." + str.substring( trim_point ));
  		}else{
  			
  			return( str.substring( 0, width-3 ) + "..." );
  		}
  	}
  	
  	// Used to test fractions and displayformatter.
  	// Keep until everything works okay.
  	public static void main(String[] args) {
  		// set decimal display to ","
  		//Locale.setDefault(Locale.GERMAN);
  		
  		double d = 0.000003991630774821635;
  		NumberFormat nf =  NumberFormat.getNumberInstance();
  		nf.setMaximumFractionDigits(6);
  		nf.setMinimumFractionDigits(6);
  		String s = nf.format(d);
  		
  		System.out.println("Actual: " + d);  // Displays 3.991630774821635E-6 
  		System.out.println("NF/6:   " + s);  // Displays 0.000004
  		// should display 0.000003
			System.out.println("DF:     " + DisplayFormatters.formatDecimal(d , 6));
  		// should display 0
			System.out.println("DF 0:   " + DisplayFormatters.formatDecimal(d , 0));
  		// should display 0.000000
			System.out.println("0.000000:" + DisplayFormatters.formatDecimal(0 , 6));
  		// should display 0.001
			System.out.println("0.001:" + DisplayFormatters.formatDecimal(0.001, 6, TRUNCZEROS_YES, ROUND_NO));
  		// should display 0
			System.out.println("0:" + DisplayFormatters.formatDecimal(0 , 0));
  		// should display 123456
			System.out.println("123456:" + DisplayFormatters.formatDecimal(123456, 0));
  		// should display 123456
			System.out.println("123456:" + DisplayFormatters.formatDecimal(123456.999, 0));
			System.out.println(DisplayFormatters.formatDecimal(0.0/0, 3));
		}
}