jquery.priceformat.js

/*
* Price Format jQuery Plugin
* Created By Eduardo Cuducos
* Currently maintained by Flavio Silveira flavio [at] gmail [dot] com
*/

(function (factory) {
  if (typeof define === "function" && define.amd) {
    define(['jquery'], factory);
  } else if (typeof exports !== 'undefined') {
    module.exports = factory(require('jquery'));
  } else {
    factory(jQuery);
  }
} (function($) {
  'use strict';

  /****************
   * Main Function *
   *****************/
  $.fn.priceFormat = function(options) {

    var options = $.extend(true, {}, $.fn.priceFormat.defaults, options);

    // detect if ctrl or metaKey(Mac) is pressed
    window.ctrl_down = false
    var metaKey = false

    $(window).bind('keyup keydown', function (e) {
        window.ctrl_down = e.ctrlKey;
        return true;
    });

    $(this).bind('keyup keydown', function (e) {
        metaKey = e.metaKey;
        return true;
    });

    return this.each(function() {
      // pre defined options
      var obj = $(this);
      var value = '';
      var is_number = /[0-9]/;

      // Check if is an input
      if (obj.is('input'))
        value = obj.val();
      else
        value = obj.html();

      // load the pluggings settings
      var prefix = options.prefix;
      var suffix = options.suffix;
      var centsSeparator = options.centsSeparator;
      var thousandsSeparator = options.thousandsSeparator;
      var limit = options.limit;
      var centsLimit = options.centsLimit;
      var clearPrefix = options.clearPrefix;
      var clearSuffix = options.clearSuffix;
      var allowNegative = options.allowNegative;
      var insertPlusSign = options.insertPlusSign;
      var clearOnEmpty = options.clearOnEmpty;
      var leadingZero = options.leadingZero;

      // If insertPlusSign is on, it automatic turns on allowNegative, to work with Signs
      if (insertPlusSign) allowNegative = true;

      function set(nvalue) {
        if (obj.is('input'))
          obj.val(nvalue);
        else
          obj.html(nvalue);

        obj.trigger('pricechange');
      }

      function get() {
        if (obj.is('input'))
          value = obj.val();
        else
          value = obj.html();

        return value;
      }

      // 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++) {
          var 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, ignore) {
        if (!ignore && (str === '' || str == price_format('0', true)) && clearOnEmpty)
          return '';

        // formatting settings
        var formatted = fill_with_zeroes(to_numbers(str));
        var thousandsFormatted = '';
        var thousandsCount = 0;

        // Checking CentsLimit
        if (centsLimit == 0) {
          centsSeparator = "";
          centsVal = "";
        }

        // split integer from cents
        var centsVal = formatted.substr(formatted.length - centsLimit, centsLimit);
        var integerVal = formatted.substr(0, formatted.length - centsLimit);

        // apply cents pontuation
        // This stops from adding a leading Zero '0.00' -> '.00'
        if (leadingZero || integerVal !== "0") {
          formatted = integerVal + centsSeparator + centsVal;
        } else {
            formatted = centsSeparator + centsVal;
          }
        }

        // apply thousands pontuation
        if (thousandsSeparator || $.trim(thousandsSeparator) != "") {
          for (var j = integerVal.length; j > 0; j--) {
            var 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 = (centsLimit == 0) ? thousandsFormatted : thousandsFormatted + centsSeparator + centsVal;
        }

        // if the string contains a dash, it is negative - add it to the begining (except for zero)
        if (allowNegative && (integerVal != 0 || centsVal != 0)) {
          if (str.indexOf('-') != -1 && str.indexOf('+') < str.indexOf('-')) {
            formatted = '-' + formatted;
          } else {
            if (!insertPlusSign)
              formatted = '' + formatted;
            else
              formatted = '+' + formatted;
          }
        }

        // apply the prefix
        if (prefix) formatted = prefix + formatted;

        // apply the suffix
        if (suffix) formatted = formatted + suffix;

        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 = value;
        var newValue = price_format(str + typed);

        // allow key numbers, 0 to 9
        if ((code >= 48 && code <= 57) || (code >= 96 && code <= 105)) functional = true;
        if (code == 192) functional = true;

        // check Backspace, Tab, Enter, Delete, and left/right arrows
        if (code == 8) functional = true;
        if (code == 9) functional = true;
        if (code == 13) functional = true;
        if (code == 46) functional = true;
        if (code == 37) functional = true;
        if (code == 39) functional = true;
        // Minus Sign, Plus Sign
        if (allowNegative && (code == 189 || code == 109 || code == 173)) functional = true;
        if (insertPlusSign && (code == 187 || code == 107 || code == 61)) functional = true;
        //Allow Home, End, Shift, Caps Lock, Esc
        if (code >= 16 && code <= 20) functional = true;
        if (code == 27) functional = true;
        if (code >= 33 && code <= 40) functional = true;
        if (code >= 44 && code <= 46) functional = true;

        // allow Ctrl shortcuts (copy, paste etc.)
        if (window.ctrl_down || metaKey){
          if (code == 86) functional = true; // v: paste
          if (code == 67) functional = true; // c: copy
          if (code == 88) functional = true; // x: cut
          if (code == 82) functional = true; // r: reload
          if (code == 84) functional = true; // t: new tab
          if (code == 76) functional = true; // l: URL bar
          if (code == 87) functional = true; // w: close window/tab
          if (code == 81) functional = true; // q: quit
          if (code == 78) functional = true; // n: new window/tab
          if (code == 65) functional = true; // a: select all
        }

        if (!functional) {
          e.preventDefault();
          e.stopPropagation();
          if (str != newValue) set(newValue);
        }

      }

      // Fill cents missing
      function fix_cents_by_str(str) {
        if (str[str.length-3] != '.' && str[str.length-3] != ',') {  // 1.11  # do nothing
          if (str[str.length-2] == '.' || str[str.length-2] == ','){ // 1.1   # fill with 1 zero
            str = str+"0";
          } else {                                                   // 1     # fill with 2 zeroes
            str = str+"00";
          }
        }
        return str;
      }
      function fix_cents() {
        var str = get();
        var new_str = fix_cents_by_str(str);
        var price = fix_cents_by_str(price_format(str));
        if (new_str != price) set(price);
        var format = fix_cents_by_str(price_format('0', true));
        if (price == format && new_str != '0' && new_str != '000' && clearOnEmpty) set('');
      }

      // Formatted price as a value
      function price_it() {
        var str = get();
        var price = price_format(str);
        if (str != price) set(price);
        var format = price_format('0', true);
        if (price == format && str != '0' && clearOnEmpty) set('');
      }

      // Add prefix on focus
      function add_prefix() {
        obj.val(prefix + get());
      }

      function add_suffix() {
        obj.val(get() + suffix);
      }

      // Clear prefix on blur if is set to true
      function clear_prefix() {
        if ($.trim(prefix) != '' && clearPrefix) {
          var array = get().split(prefix);
          set(array[1]);
        }
      }

      // Clear suffix on blur if is set to true
      function clear_suffix() {
        if ($.trim(suffix) != '' && clearSuffix) {
          var array = get().split(suffix);
          set(array[0]);
        }
      }

      // bind the actions
      obj.bind('keydown.price_format', key_check);
      obj.bind('keyup.price_format', price_it);
      obj.bind('focusout.price_format', price_it);

      // Clear Prefix and Add Prefix
      if (clearPrefix) {
        obj.bind('focusout.price_format', function() {
          clear_prefix();
        });

        obj.bind('focusin.price_format', function() {
          add_prefix();
        });
      }

      // Clear Suffix and Add Suffix
      if (clearSuffix) {
        obj.bind('focusout.price_format', function() {
          clear_suffix();
        });

        obj.bind('focusin.price_format', function() {
          add_suffix();
        });
      }

      // If value has content
      if (get().length > 0) {
        fix_cents();
        price_it();
        clear_prefix();
        clear_suffix();
      }

    });

  };

  /**********************
   * Remove price format *
   ***********************/
  $.fn.unpriceFormat = function() {
    return $(this).unbind(".price_format");
  };

  /******************
   * Unmask Function *
   *******************/
  $.fn.unmask = function() {

    var field;
    var result = "";

    if ($(this).is('input'))
      field = $(this).val() || [];
    else
      field = $(this).html();

    for (var f = 0; f < field.length; f++) {
      if (!isNaN(field[f]) || field[f] == "-") result += field[f];
    }

    return result;
  };

  /******************
   * Price to Float *
   ******************/
  $.fn.priceToFloat = function() {

    var field;

    if ($(this).is('input'))
      field = $(this).val() || [];
    else
      field = $(this).html();

    return parseFloat(field.replace(/[^0-9\-\.]/g, ''));
  };

  /************
   * Defaults *
   ************/
  $.fn.priceFormat.defaults = {
    prefix: 'US$ ',
    suffix: '',
    centsSeparator: '.',
    thousandsSeparator: ',',
    limit: false,
    centsLimit: 2,
    clearPrefix: false,
    clearSufix: false,
    allowNegative: false,
    insertPlusSign: false,
    clearOnEmpty: false,
    leadingZero: true
  };
}));