text: 'use strict';
  
  exports.type = 'perItem';
  
  exports.active = false;
  
  exports.description = 'rounds list of values to the fixed precision';
  
  exports.params = {
      floatPrecision: 3,
      leadingZero: true,
      defaultPx: true,
      convertToPx: true
  };
  
  var regNumericValues = /^([\-+]?\d*\.?\d+([eE][\-+]?\d+)?)(px|pt|pc|mm|cm|m|in|ft|em|ex|%)?$/,
      regSeparator = /\s+,?\s*|,\s*/,
      removeLeadingZero = require('../lib/svgo/tools').removeLeadingZero,
      absoluteLengths = { // relative to px
          cm: 96/2.54,
          mm: 96/25.4,
          in: 96,
          pt: 4/3,
          pc: 16
      };
  
  /**
   * Round list of values to the fixed precision.
   *
   * @example
   * <svg viewBox="0 0 200.28423 200.28423" enable-background="new 0 0 200.28423 200.28423">
   *         ⬇
   * <svg viewBox="0 0 200.284 200.284" enable-background="new 0 0 200.284 200.284">
   *
   *
   * <polygon points="208.250977 77.1308594 223.069336 ... "/>
   *         ⬇
   * <polygon points="208.251 77.131 223.069 ... "/>
   *
   *
   * @param {Object} item current iteration item
   * @param {Object} params plugin params
   * @return {Boolean} if false, item will be filtered out
   *
   * @author kiyopikko
   */
  exports.fn = function(item, params) {
  
  
      if ( item.hasAttr('points') ) {
          roundValues(item.attrs.points);
      }
  
      if ( item.hasAttr('enable-background') ) {
          roundValues(item.attrs['enable-background']);
      }
  
      if ( item.hasAttr('viewBox') ) {
          roundValues(item.attrs.viewBox);
      }
  
      if ( item.hasAttr('stroke-dasharray') ) {
          roundValues(item.attrs['stroke-dasharray']);
      }
  
      if ( item.hasAttr('dx') ) {
          roundValues(item.attrs.dx);
      }
  
      if ( item.hasAttr('dy') ) {
          roundValues(item.attrs.dy);
      }
  
      if ( item.hasAttr('x') ) {
          roundValues(item.attrs.x);
      }
  
      if ( item.hasAttr('y') ) {
          roundValues(item.attrs.y);
      }
  
  
      function roundValues($prop){
  
          var num, units,
              match,
              matchNew,
              lists = $prop.value,
              listsArr = lists.split(regSeparator),
              roundedListArr = [],
              roundedList;
  
          listsArr.forEach(function(elem){
  
              match = elem.match(regNumericValues);
              matchNew = elem.match(/new/);
  
               // if attribute value matches regNumericValues
              if (match) {
                  // round it to the fixed precision
                  num = +(+match[1]).toFixed(params.floatPrecision),
                  units = match[3] || '';
  
                  // convert absolute values to pixels
                  if (params.convertToPx && units && (units in absoluteLengths)) {
                      var pxNum = +(absoluteLengths[units] * match[1]).toFixed(params.floatPrecision);
  
                      if (String(pxNum).length < match[0].length)
                          num = pxNum,
                          units = 'px';
                  }
  
                   // and remove leading zero
                  if (params.leadingZero) {
                      num = removeLeadingZero(num);
                  }
  
                  // remove default 'px' units
                  if (params.defaultPx && units === 'px') {
                      units = '';
                  }
  
                  roundedListArr.push(num+units);
              }
              // if attribute value is "new"(only enable-background).
              else if (matchNew) {
                  roundedListArr.push('new');
              } else if (elem) {
                  roundedListArr.push(elem);
              }
  
          });
  
          roundedList = roundedListArr.join(' ');
          $prop.value = roundedList;
  
      }
  
  };
  