/*
* @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;
                                }
                                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 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);