/*
* @Copyright (c) 2010 Ricardo Andrietta Mendes - eng.rmendes@gmail.com
* 
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
* 
* How to use it:
* var formated_value = $().number_format(final_value);
* 
* Advanced:
* var formated_value = $().number_format(final_value, 
* 													{
* 													numberOfDecimals:3,
* 													decimalSeparator: '.',
* 													thousandSeparator: ',',
* 													symbol: 'R$'
* 													});
*/
//indica que está sendo criado um plugin
jQuery.noConflict(); (function($) {

	jQuery.fn.extend({ //indica que está sendo criado um plugin
		
		number_format: function(numero, params) //indica o nome do plugin que será criado com os parametros a serem informados
			{ 
			//parametros default
			var sDefaults = 
				{			
				numberOfDecimals: 2,
				decimalSeparator: ',',
				thousandSeparator: '.',
				symbol: ''
				}
	 
			//função do jquery que substitui os parametros que não foram informados pelos defaults
			var options = jQuery.extend(sDefaults, params);
	
			//CORPO DO PLUGIN
			var number = numero; 
			var decimals = options.numberOfDecimals;
			var dec_point = options.decimalSeparator;
			var thousands_sep = options.thousandSeparator;
			var currencySymbol = options.symbol;
			
			var exponent = "";
			var numberstr = number.toString ();
			var eindex = numberstr.indexOf ("e");
			if (eindex > -1)
			{
			exponent = numberstr.substring (eindex);
			number = parseFloat (numberstr.substring (0, eindex));
			}
			
			if (decimals != null)
			{
			var temp = Math.pow (10, decimals);
			number = Math.round (number * temp) / temp;
			}
			var sign = number < 0 ? "-" : "";
			var integer = (number > 0 ? 
			  Math.floor (number) : Math.abs (Math.ceil (number))).toString ();
			
			var fractional = number.toString ().substring (integer.length + sign.length);
			dec_point = dec_point != null ? dec_point : ".";
			fractional = decimals != null && decimals > 0 || fractional.length > 1 ? 
					   (dec_point + fractional.substring (1)) : "";
			if (decimals != null && decimals > 0)
			{
			for (i = fractional.length - 1, z = decimals; i < z; ++i)
			  fractional += "0";
			}
			
			thousands_sep = (thousands_sep != dec_point || fractional.length == 0) ? 
						  thousands_sep : null;
			if (thousands_sep != null && thousands_sep != "")
			{
			for (i = integer.length - 3; i > 0; i -= 3)
			  integer = integer.substring (0 , i) + thousands_sep + integer.substring (i);
			}
			
			if (options.symbol == '')
			{
			return sign + integer + fractional + exponent;
			}
			else
			{
			return currencySymbol + ' ' + sign + integer + fractional + exponent;
			}
			//FIM DO CORPO DO PLUGIN	
			
		}
	});

})(jQuery);