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   1  /*
   2  YUI 3.17.2 (build 9c3c78e)
   3  Copyright 2014 Yahoo! Inc. All rights reserved.
   4  Licensed under the BSD License.
   5  http://yuilibrary.com/license/
   6  */
   7  
   8  YUI.add('datatype-number-parse', function (Y, NAME) {
   9  
  10  /**
  11   * Parse number submodule.
  12   *
  13   * @module datatype-number
  14   * @submodule datatype-number-parse
  15   * @for Number
  16   */
  17  
  18  var safe = Y.Escape.regex,
  19      SPACES = '\\s*';
  20  
  21  Y.mix(Y.namespace("Number"), {
  22      /**
  23       * Returns a parsing function for the given configuration.
  24       * It uses `Y.cached` so it expects the format spec separated into
  25       * individual values.
  26       * The method further uses closure to put together and save the
  27       * regular expresssion just once in the outer function.
  28       *
  29       * @method _buildParser
  30       * @param [prefix] {String} Prefix string to be stripped out.
  31       * @param [suffix] {String} Suffix string to be stripped out.
  32       * @param [separator] {String} Thousands separator to be stripped out.
  33       * @param [decimal] {String} Decimal separator to be replaced by a dot.
  34       * @return {Function} Parsing function.
  35       * @private
  36       */
  37      _buildParser: Y.cached(function (prefix, suffix, separator, decimal) {
  38          var regexBits = [],
  39              regex;
  40  
  41          if (prefix) {
  42              regexBits.push('^' + SPACES + safe(prefix) + SPACES);
  43          }
  44          if (suffix) {
  45              regexBits.push(SPACES + safe(suffix) + SPACES + '$');
  46          }
  47          if (separator) {
  48              regexBits.push(safe(separator) + '(?=\\d)');
  49          }
  50  
  51          regex = new RegExp('(?:' + regexBits.join('|') + ')', 'g');
  52  
  53          if (decimal === '.') {
  54              decimal = null;
  55          }
  56          return function (val) {
  57              val = val.replace(regex, '');
  58  
  59              return decimal ? val.replace(decimal, '.') : val;
  60          };
  61      }),
  62      /**
  63       * Converts data to type Number.
  64       * If a `config` argument is used, it will strip the `data` of the prefix,
  65       * the suffix and the thousands separator, if any of them are found,
  66       * replace the decimal separator by a dot and parse the resulting string.
  67       * Extra whitespace around the prefix and suffix will be ignored.
  68       *
  69       * @method parse
  70       * @param data {String | Number | Boolean} Data to convert. The following
  71       * values return as null: null, undefined, NaN, "".
  72       * @param [config] {Object} Optional configuration values, same as for [Y.Date.format](#method_format).
  73       * @param [config.prefix] {String} String to be removed from the start, like a currency designator "$"
  74       * @param [config.decimalPlaces] {Number} Ignored, it is accepted only for compatibility with [Y.Date.format](#method_format).
  75       * @param [config.decimalSeparator] {String} Decimal separator.
  76       * @param [config.thousandsSeparator] {String} Thousands separator.
  77       * @param [config.suffix] {String} String to be removed from the end of the number, like " items".
  78       * @return {Number} A number, or null.
  79       */
  80  
  81      parse: function(data, config) {
  82          var parser;
  83  
  84          if (config && typeof data === 'string') {
  85              parser = this._buildParser(config.prefix, config.suffix, config.thousandsSeparator, config.decimalSeparator);
  86  
  87              data = parser(data);
  88          }
  89  
  90          if (typeof data === 'string' && Y.Lang.trim(data) !== '') {
  91              data = +data;
  92          }
  93          
  94          // catch NaN and ±Infinity
  95          if (typeof data !== 'number' || !isFinite(data)) {
  96              data = null;
  97          }
  98  
  99          // on the same line to get stripped for raw/min.js by build system
 100  
 101          return data;
 102      }
 103  });
 104  
 105  // Add Parsers shortcut
 106  Y.namespace("Parsers").number = Y.Number.parse;
 107  Y.namespace("DataType");
 108  Y.DataType.Number = Y.Number;
 109  
 110  
 111  }, '3.17.2', {"requires": ["escape"]});