ÿþ/*



* Price Format jQuery Plugin

* By Eduardo Cuducos

* cuducos [at] gmail [dot] com

* Version: 1.1

* Release: 2009-02-10



* original char limit by Flýÿvio Silveira <http://flaviosilveira.com>

* original keydown event attachment by Kaihua Qi

* keydown fixes by Thasmo <http://thasmo.com>



*/



(function($) {



    $.fn.priceFormat = function(options) {



        var defaults = {

            prefix: 'US$ ',

            centsSeparator: '.',

            thousandsSeparator: ',',

            limit: false,

            centsLimit: 2

        };



        var options = $.extend(defaults, options);



        return this.each(function() {



            // pre defined options

            var obj = $(this);

            var is_number = /[0-9]/;



            // load the pluggings settings

            var prefix = options.prefix;

            var centsSeparator = options.centsSeparator;

            var thousandsSeparator = options.thousandsSeparator;

            var limit = options.limit;

            var centsLimit = options.centsLimit;



            // skip everything that isn't a number

            // and also skip the left zeroes

            function to_numbers(str) {

                var formatted = '';

                for (var i = 0; i < (str.length); i++) {

                    char = str.charAt(i);

                    if (formatted.length == 0 && char == 0) char = false;

                    if (char && char.match(is_number)) {

                        if (limit) {

                            if (formatted.length < limit) formatted = formatted + char;

                        } else {

                            formatted = formatted + char;

                        }

                    }

                }

                return formatted;

            }



            // format to fill with zeros to complete cents chars

            function fill_with_zeroes(str) {

                while (str.length < (centsLimit + 1)) str = '0' + str;

                return str;

            }



            // format as price

            function price_format(str) {



                // formatting settings

                var formatted = fill_with_zeroes(to_numbers(str));

                var thousandsFormatted = '';

                var thousandsCount = 0;



                // split integer from cents

                var centsVal = formatted.substr(formatted.length - centsLimit, centsLimit);

                var integerVal = formatted.substr(0, formatted.length - centsLimit);



                // apply cents pontuation

                formatted = integerVal + centsSeparator + centsVal;



                // apply thousands pontuation

                if (thousandsSeparator) {

                    for (var j = integerVal.length; j > 0; j--) {

                        char = integerVal.substr(j - 1, 1);

                        thousandsCount++;

                        if (thousandsCount % 3 == 0) char = thousandsSeparator + char;

                        thousandsFormatted = char + thousandsFormatted;

                    }

                    if (thousandsFormatted.substr(0, 1) == thousandsSeparator) thousandsFormatted = thousandsFormatted.substring(1, thousandsFormatted.length);

                    formatted = thousandsFormatted + centsSeparator + centsVal;

                }



                // apply the prefix

                if (prefix) formatted = prefix + formatted;



                return formatted;



            }



            // filter what user type (only numbers and functional keys)

            function key_check(e) {



                var code = (e.keyCode ? e.keyCode : e.which);

                var typed = String.fromCharCode(code);

                var functional = false;

                var str = obj.val();

                var newValue = price_format(str + typed);



                // allow keypad numbers, 0 to 9

                if (code >= 96 && code <= 105) functional = true;



                // check Backspace, Tab, Enter, and left/right arrows

                if (code == 8) functional = true;

                if (code == 9) functional = true;

                if (code == 13) functional = true;

                if (code == 37) functional = true;

                if (code == 39) functional = true;



                if (!functional) {

                    e.preventDefault();

                    e.stopPropagation();

                    if (str != newValue) obj.val(newValue);

                }



            }



            // inster formatted price as a value of an input field

            function price_it() {

                var str = obj.val();

                var price = price_format(str);

                if (str != price) obj.val(price);

            }



            // bind the actions

            $(this).bind('keydown', key_check);

            $(this).bind('keyup', price_it);

            if ($(this).val().length > 0) price_it();



        });



    };



})(jQuery);