text: "use strict";
  
  function _defaults(obj, defaults) { var keys = Object.getOwnPropertyNames(defaults); for (var i = 0; i < keys.length; i++) { var key = keys[i]; var value = Object.getOwnPropertyDescriptor(defaults, key); if (value && value.configurable && obj[key] === undefined) { Object.defineProperty(obj, key, value); } } return obj; }
  
  function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _defaults(subClass, superClass); }
  
  function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
  
  var Declaration = require('../declaration');
  
  var BreakProps =
  /*#__PURE__*/
  function (_Declaration) {
    _inheritsLoose(BreakProps, _Declaration);
  
    function BreakProps() {
      return _Declaration.apply(this, arguments) || this;
    }
  
    var _proto = BreakProps.prototype;
  
    /**
     * Change name for -webkit- and -moz- prefix
     */
    _proto.prefixed = function prefixed(prop, prefix) {
      return prefix + "column-" + prop;
    }
    /**
     * Return property name by final spec
     */
    ;
  
    _proto.normalize = function normalize(prop) {
      if (prop.indexOf('inside') !== -1) {
        return 'break-inside';
      }
  
      if (prop.indexOf('before') !== -1) {
        return 'break-before';
      }
  
      return 'break-after';
    }
    /**
     * Change prefixed value for avoid-column and avoid-page
     */
    ;
  
    _proto.set = function set(decl, prefix) {
      if (decl.prop === 'break-inside' && decl.value === 'avoid-column' || decl.value === 'avoid-page') {
        decl.value = 'avoid';
      }
  
      return _Declaration.prototype.set.call(this, decl, prefix);
    }
    /**
     * Don’t prefix some values
     */
    ;
  
    _proto.insert = function insert(decl, prefix, prefixes) {
      if (decl.prop !== 'break-inside') {
        return _Declaration.prototype.insert.call(this, decl, prefix, prefixes);
      }
  
      if (/region/i.test(decl.value) || /page/i.test(decl.value)) {
        return undefined;
      }
  
      return _Declaration.prototype.insert.call(this, decl, prefix, prefixes);
    };
  
    return BreakProps;
  }(Declaration);
  
  _defineProperty(BreakProps, "names", ['break-inside', 'page-break-inside', 'column-break-inside', 'break-before', 'page-break-before', 'column-break-before', 'break-after', 'page-break-after', 'column-break-after']);
  
  module.exports = BreakProps;