/*
* @Copyright (c) 2008 Aurélio Saraiva (aureliosaraiva@gmail.com)
* @Page http://inovaideia.com.br/maskInputMoney

* 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.
*/

/*
* @Version: 0.2
* @Release: 2008-07-25
*/
(function($) {
	$.fn.maskMoney = function(settings) {
		settings = $.extend({
			symbol: "US$",
			decimal: ".",
			precision: 2,
			thousands: ",",
			showSymbol:true
		}, settings);

		settings.symbol=settings.symbol+" ";

		return this.each(function() {
			var input=$(this);
			function money(e) {
				e=e||window.event;
				var k=e.charCode||e.keyCode||e.which;
				if (k == 8) { // tecla backspace
					preventDefault(e);
					var x = input.val().substring(0,input.val().length-1);
					input.val(maskValue(x));
					return false;
				} else if (k == 9) { // tecla tab
					return true;
				}
				if (k < 48 || k > 57) {
					preventDefault(e);
					return true;
				}
				
				
                //Maxlenght. Se o usuário não colocar a propriedade maxlength fica ilimitado.
				if (input.attr("maxlength") > 0){ 				
                if(input.val().length > input.attr("maxlength"))
                    return false;
				}
				
				var key = String.fromCharCode(k);  // Valor para o código da Chave
				preventDefault(e);
				input.val(maskValue(input.val()+key));
			}

			function preventDefault(e) {
				if (e.preventDefault) { //standart browsers
					e.preventDefault()
				} else { // internet explorer
					e.returnValue = false
				}
			}

			function maskValue(v) {
				v = v.replace(settings.symbol,"");
				var a = '';
				var strCheck = '0123456789';
				var len = v.length;
				var t = "";
				if (len== 0) {
					t = "0.00";
				}
				for (var i = 0; i < len; i++)
					if ((v.charAt(i) != '0') && (v.charAt(i) != settings.decimal))
						break;

				for (; i < len; i++) {
					if (strCheck.indexOf(v.charAt(i))!=-1) a+= v.charAt(i);
				}

				var n = parseFloat(a);
				n = isNaN(n) ? 0 : n/Math.pow(10, settings.precision);
				t = n.toFixed(settings.precision);

				var p, d = (t=t.split("."))[1].substr(0, settings.precision);
				for (p = (t=t[0]).length; (p-=3) >= 1;) {
					t = t.substr(0,p) + settings.thousands + t.substr(p);
				}
				return setSymbol(t+settings.decimal+d+Array(
					(settings.precision+1)-d.length).join(0));
			}

			function focusEvent() {
				if (input.val()=="") {
					input.val(setSymbol(getDefaultMask()));
				} else {
					input.val(setSymbol(input.val()));
				}
			}

			function blurEvent() {
				if (input.val()==setSymbol(getDefaultMask())) {
					input.val("");
				} else {
					input.val(input.val().replace(settings.symbol,""))
				}
			}
			
//			function blurEvent() {
//			if (input.val()==setSymbol(getDefaultMask())) {
//				alert(input.attr("value"));
//				input.val(input.attr("value")); 
//			} else {
//				input.val(input.val().replace(settings.symbol,""))
//			}
//		}			

			function getDefaultMask() {
				var n = parseFloat("0")/Math.pow(10, settings.precision);
				return (n.toFixed(settings.precision)).replace(
					new RegExp("\\.", "g"), settings.decimal);
			}

			function setSymbol(v) {
				if (settings.showSymbol) {
					return settings.symbol+v;
				}
				return v;
			}

			input.bind("keypress",money);
			input.bind("blur",blurEvent);
			input.bind("focus",focusEvent);

			input.one("unmaskMoney",function() {
				input.unbind("focus",focusEvent);
				input.unbind("blur",blurEvent);
				input.unbind("keypress",money);
				if ($.browser.msie)
				this.onpaste= null;
				else if ($.browser.mozilla)
				this.removeEventListener('input',blurEvent,false);
			});
		});
	}

	$.fn.unmaskMoney=function() {
		return this.trigger("unmaskMoney");
	};
})(jQuery);