/*
    * Copyright (c) 2003-2008 by Cosylab d. d.
    *
    * This file is part of CosyBeans-Common.
    *
    * CosyBeans-Common is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
   *
   * CosyBeans-Common is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with CosyBeans-Common.  If not, see <http://www.gnu.org/licenses/>.
   */
  
  package com.cosylab.gui.components.wheelswitch;
  
  
  
  /**
   * Formats <code>java.lang.String</code>s to be displayed as digits in  the
   * <code>Wheelswitch</code>. The format is specified in a format
   * <code>java.lang.String</code>. <code>WheelswitchFormatter</code> also
   * stores the value, its bounds (minimum and maximum) and also the unit
   * displayed by the <code>Wheelswitch</code>.
   *
   * @author <a href="mailto:jernej.kamenik@cosylab.com">Jernej Kamenik</a>
   * @version $id$
   */
  public class WheelswitchFormatter extends AbstractWheelswitchFormatter
  {
  	/**
  	 * Constructs the PlainWheelswitchFormatter and sets the format  string.
  	 *
  	 * @param newFormatString
  	 *
  	 * @see #setFormat(String)
  	 */
  	public WheelswitchFormatter(String newFormatString)
  	{
  		super(newFormatString);
  	}
  
  	/**
  	 * Constructs the PlainWheelswitchFormatter with no format string.
  	 *
  	 * @see #setFormat(String)
  	 */
  	public WheelswitchFormatter()
  	{
  		super();
  	}
  
  	protected void internalSetString(String newValueString) {
  		if (debug) System.out.println("WheelswitchFormatter:SET STRING VALUE: " + newValueString);		
  		
  		double newValue = Double.parseDouble(newValueString);
  		String tempFormatString = formatString;
  
  		if (formatString == null) {
  			tempFormatString = generateFormat();
  		}
  
  		int newExpIndex = Math.max(newValueString.indexOf("E"),
  				newValueString.indexOf("e"));
  
  		if (newExpIndex < 0) {
  			newExpIndex = newValueString.length();
  		}
  
  		int formatExpIndex = tempFormatString.indexOf("E");
  
  		if (formatExpIndex < 0) {
  			formatExpIndex = tempFormatString.length();
  		}
  
  		int newDotIndex = Math.max(newValueString.indexOf("."),
  				newValueString.indexOf(","));
  
  		if (newDotIndex < 0) {
  			newDotIndex = newExpIndex;
  		}
  
  		int formatDotIndex = tempFormatString.indexOf(".");
  
  		if (formatDotIndex < 0) {
  			formatDotIndex = formatExpIndex;
  		}
  
  		int newSignTag = 0;
  
  		if (newValueString.charAt(0) == '+') {
  			newSignTag++;
  		} else if (newValueString.charAt(0) == '-') {
  			newSignTag--;
 		}
 
 		int formatSignTag = 0;
 
 		if (tempFormatString.charAt(0) == '+') {
 			formatSignTag++;
 		}
 		
 		int formatExpSignTag = 0;
 
 		if (formatExpIndex + 1 < tempFormatString.length()
 			&& tempFormatString.charAt(formatExpIndex + 1) == '+') {
 			formatExpSignTag++;
 		}
 
 		int newExpValue = 0;
 
 		if (newExpIndex < newValueString.length() - 1) {
 			newExpValue += (int)Double.parseDouble(newValueString.substring(newExpIndex
 					+ 1));
 		}
 		
 		//sync the exp value with format
 		newExpValue += newDotIndex - formatDotIndex;
 
 		if (newSignTag != 0) {
 			newExpValue--;
 		}
 
 		if (formatSignTag != 0) {
 			newExpValue++;
 		}
 
 		//display mantissa as integer
 		newValueString = newValueString.substring(0, newDotIndex)
 			+ ((newDotIndex < newExpIndex - 1)
 			? (newValueString.substring(newDotIndex + 1, newExpIndex)) : (""));
 
 		if (newSignTag != 0) {
 			newValueString = newValueString.substring(1);
 		}
 
 		boolean substract = true;
 		while (newValueString.charAt(0) == '0' && newValueString.length() > 1) {
 			newValueString = newValueString.substring(1);
 			//bugfix by jbobnar: If the value is 0 don't do any manipulation, since 
 			//this would change what the value that is being set
 			if (newValue != 0.) {
 				newExpValue--;
 			}
 			substract = false;
 		}
 
 		if (newValue == 0. && substract) {
 			newExpValue+=newExpIndex-3;
 		}
 		
 		// Ike: Check if eponent over double range
 		// TODO: this does not eliminates problem if decimal in whole value over range, even if exp is in range.
 		if (newExpValue<-323) {
 			newExpValue=-323;
 		} else {
 			if (newExpValue>307) {
 				newExpValue=307;
 			}
 		}
 
 		//sync mantissa with format
 		while (newValueString.length() < formatExpIndex - formatSignTag
 			- ((formatDotIndex < formatExpIndex) ? (1) : (0))) {
 			newValueString += "0";
 		}
 
 		//if exponent should be displayed
 		if (formatExpIndex + formatExpSignTag + 1 < tempFormatString.length()) {
 			//parse exponent
 			String exponent = String.valueOf(newExpValue);
 
 			int newExpSignTag = 1;
 
 			if (newExpValue < 0) {
 				newExpSignTag = -1;
 				exponent = exponent.substring(1);
 			}
 
 			//parse mantissa
 			newValueString = newValueString.substring(0,
 					formatDotIndex - formatSignTag) + "."
 				+ newValueString.substring(formatDotIndex - formatSignTag);
 
 			if (newValue != 0.) {
 				newValueString = formatter.sprintf(Double.parseDouble(
 							newValueString)).replaceAll(",", ".");
 
 				if (newValueString.charAt(0) == '+') {
 					newValueString = newValueString.substring(1);
 				}
 			}
 
 			if (newSignTag == -1) {
 				newValueString = "-" + newValueString;
 			} else if (formatSignTag == 1) {
 				newValueString = "+" + newValueString;
 			}
 
 			newValueString += "E";
 
 			//add exponent
 			if (newExpSignTag == -1) {
 				newValueString += "-";
 			} else if (formatExpSignTag == 1) {
 				newValueString += "+";
 			}
 
 			int exponentLength = tempFormatString.length() - formatExpIndex
 				- formatExpSignTag - 1;
 
 			while (exponent.length() < exponentLength) {
 				exponent = "0" + exponent;
 			}
 
 			newValueString += exponent;
 		} else {
 			//parse mantissa only
 			while (newExpValue > 0) {
 				newValueString += "0";
 				formatDotIndex++;
 				newExpValue--;
 			}
 
 			while (newExpValue < 0) {
 				newValueString = "0" + newValueString;
 				newExpValue++;
 			}
 
 			newValueString = newValueString.substring(0,
 					formatDotIndex - formatSignTag) + "."
 				+ newValueString.substring(formatDotIndex - formatSignTag);
 
 			if (newValueString.charAt(0) != '0') {
 				newValueString = formatter.sprintf(Double.parseDouble(
 							newValueString)).replaceAll(",", ".");
 
 				if (newValueString.charAt(0) == '+') {
 					newValueString = newValueString.substring(1);
 				}
 			} else {
 				newValueString = "1" + newValueString.substring(1);
 				newValueString = formatter.sprintf(Double.parseDouble(
 							newValueString)).replaceAll(",", ".");
 
 				if (newValueString.charAt(0) == '+') {
 					newValueString = newValueString.substring(1);
 				}
 
 				newValueString = "0" + newValueString.substring(1);
 			}
 
 			if (newSignTag == -1) {
 				newValueString = "-" + newValueString;
 			} else if (formatSignTag == 1) {
 				newValueString = "+" + newValueString;
 			}
 		}
 
 		value = newValue;
 		valueString = newValueString;	
 	}
 }
 
 /* __oOo__ */