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'use strict';

exports.type = 'perItem';

exports.active = true;

exports.description = 'converts non-eccentric <ellipse>s to <circle>s';

/**
 * Converts non-eccentric <ellipse>s to <circle>s.
 *
 * @see http://www.w3.org/TR/SVG/shapes.html
 *
 * @param {Object} item current iteration item
 * @return {Boolean} if false, item will be filtered out
 *
 * @author Taylor Hunt
 */
exports.fn = function(item) {
    if (item.isElem('ellipse')) {
      var rx = item.attr('rx').value || 0;
      var ry = item.attr('ry').value || 0;

      if (rx === ry ||
          rx === 'auto' || ry === 'auto' // SVG2
         ) {
        var radius = rx !== 'auto' ? rx : ry;
        item.renameElem('circle');
        item.removeAttr(['rx', 'ry']);
        item.addAttr({
            name: 'r',
            value: radius,
            prefix: '',
            local: 'r',
          });
      }
  }
  return;
};