text: "use strict";
  
  function _createForOfIteratorHelperLoose(o) { var i = 0; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (o = _unsupportedIterableToArray(o))) return function () { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }; throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } i = o[Symbol.iterator](); return i.next.bind(i); }
  
  function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(n); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
  
  function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
  
  var postcss = require('postcss');
  
  var data = require('caniuse-lite').feature(require('caniuse-lite/data/features/css-featurequeries.js'));
  
  var Browsers = require('./browsers');
  
  var brackets = require('./brackets');
  
  var Value = require('./value');
  
  var utils = require('./utils');
  
  var supported = [];
  
  for (var browser in data.stats) {
    var versions = data.stats[browser];
  
    for (var version in versions) {
      var support = versions[version];
  
      if (/y/.test(support)) {
        supported.push(browser + ' ' + version);
      }
    }
  }
  
  var Supports = /*#__PURE__*/function () {
    function Supports(Prefixes, all) {
      this.Prefixes = Prefixes;
      this.all = all;
    }
    /**
       * Return prefixer only with @supports supported browsers
       */
  
  
    var _proto = Supports.prototype;
  
    _proto.prefixer = function prefixer() {
      if (this.prefixerCache) {
        return this.prefixerCache;
      }
  
      var filtered = this.all.browsers.selected.filter(function (i) {
        return supported.includes(i);
      });
      var browsers = new Browsers(this.all.browsers.data, filtered, this.all.options);
      this.prefixerCache = new this.Prefixes(this.all.data, browsers, this.all.options);
      return this.prefixerCache;
    }
    /**
       * Parse string into declaration property and value
       */
    ;
  
    _proto.parse = function parse(str) {
      var parts = str.split(':');
      var prop = parts[0];
      var value = parts[1];
      if (!value) value = '';
      return [prop.trim(), value.trim()];
    }
    /**
       * Create virtual rule to process it by prefixer
       */
    ;
  
    _proto.virtual = function virtual(str) {
      var _this$parse = this.parse(str),
          prop = _this$parse[0],
          value = _this$parse[1];
  
      var rule = postcss.parse('a{}').first;
      rule.append({
        prop: prop,
        value: value,
        raws: {
          before: ''
        }
      });
      return rule;
    }
    /**
       * Return array of Declaration with all necessary prefixes
       */
    ;
  
    _proto.prefixed = function prefixed(str) {
      var rule = this.virtual(str);
  
      if (this.disabled(rule.first)) {
        return rule.nodes;
      }
  
      var result = {
        warn: function warn() {
          return null;
        }
      };
      var prefixer = this.prefixer().add[rule.first.prop];
      prefixer && prefixer.process && prefixer.process(rule.first, result);
  
      for (var _iterator = _createForOfIteratorHelperLoose(rule.nodes), _step; !(_step = _iterator()).done;) {
        var decl = _step.value;
  
        for (var _iterator2 = _createForOfIteratorHelperLoose(this.prefixer().values('add', rule.first.prop)), _step2; !(_step2 = _iterator2()).done;) {
          var value = _step2.value;
          value.process(decl);
        }
  
        Value.save(this.all, decl);
      }
  
      return rule.nodes;
    }
    /**
       * Return true if brackets node is "not" word
       */
    ;
  
    _proto.isNot = function isNot(node) {
      return typeof node === 'string' && /not\s*/i.test(node);
    }
    /**
       * Return true if brackets node is "or" word
       */
    ;
  
    _proto.isOr = function isOr(node) {
      return typeof node === 'string' && /\s*or\s*/i.test(node);
    }
    /**
       * Return true if brackets node is (prop: value)
       */
    ;
  
    _proto.isProp = function isProp(node) {
      return typeof node === 'object' && node.length === 1 && typeof node[0] === 'string';
    }
    /**
       * Return true if prefixed property has no unprefixed
       */
    ;
  
    _proto.isHack = function isHack(all, unprefixed) {
      var check = new RegExp("(\\(|\\s)" + utils.escapeRegexp(unprefixed) + ":");
      return !check.test(all);
    }
    /**
       * Return true if we need to remove node
       */
    ;
  
    _proto.toRemove = function toRemove(str, all) {
      var _this$parse2 = this.parse(str),
          prop = _this$parse2[0],
          value = _this$parse2[1];
  
      var unprefixed = this.all.unprefixed(prop);
      var cleaner = this.all.cleaner();
  
      if (cleaner.remove[prop] && cleaner.remove[prop].remove && !this.isHack(all, unprefixed)) {
        return true;
      }
  
      for (var _iterator3 = _createForOfIteratorHelperLoose(cleaner.values('remove', unprefixed)), _step3; !(_step3 = _iterator3()).done;) {
        var checker = _step3.value;
  
        if (checker.check(value)) {
          return true;
        }
      }
  
      return false;
    }
    /**
       * Remove all unnecessary prefixes
       */
    ;
  
    _proto.remove = function remove(nodes, all) {
      var i = 0;
  
      while (i < nodes.length) {
        if (!this.isNot(nodes[i - 1]) && this.isProp(nodes[i]) && this.isOr(nodes[i + 1])) {
          if (this.toRemove(nodes[i][0], all)) {
            nodes.splice(i, 2);
            continue;
          }
  
          i += 2;
          continue;
        }
  
        if (typeof nodes[i] === 'object') {
          nodes[i] = this.remove(nodes[i], all);
        }
  
        i += 1;
      }
  
      return nodes;
    }
    /**
       * Clean brackets with one child
       */
    ;
  
    _proto.cleanBrackets = function cleanBrackets(nodes) {
      var _this = this;
  
      return nodes.map(function (i) {
        if (typeof i !== 'object') {
          return i;
        }
  
        if (i.length === 1 && typeof i[0] === 'object') {
          return _this.cleanBrackets(i[0]);
        }
  
        return _this.cleanBrackets(i);
      });
    }
    /**
       * Add " or " between properties and convert it to brackets format
       */
    ;
  
    _proto.convert = function convert(progress) {
      var result = [''];
  
      for (var _iterator4 = _createForOfIteratorHelperLoose(progress), _step4; !(_step4 = _iterator4()).done;) {
        var i = _step4.value;
        result.push([i.prop + ": " + i.value]);
        result.push(' or ');
      }
  
      result[result.length - 1] = '';
      return result;
    }
    /**
       * Compress value functions into a string nodes
       */
    ;
  
    _proto.normalize = function normalize(nodes) {
      var _this2 = this;
  
      if (typeof nodes !== 'object') {
        return nodes;
      }
  
      nodes = nodes.filter(function (i) {
        return i !== '';
      });
  
      if (typeof nodes[0] === 'string' && nodes[0].includes(':')) {
        return [brackets.stringify(nodes)];
      }
  
      return nodes.map(function (i) {
        return _this2.normalize(i);
      });
    }
    /**
       * Add prefixes
       */
    ;
  
    _proto.add = function add(nodes, all) {
      var _this3 = this;
  
      return nodes.map(function (i) {
        if (_this3.isProp(i)) {
          var prefixed = _this3.prefixed(i[0]);
  
          if (prefixed.length > 1) {
            return _this3.convert(prefixed);
          }
  
          return i;
        }
  
        if (typeof i === 'object') {
          return _this3.add(i, all);
        }
  
        return i;
      });
    }
    /**
       * Add prefixed declaration
       */
    ;
  
    _proto.process = function process(rule) {
      var ast = brackets.parse(rule.params);
      ast = this.normalize(ast);
      ast = this.remove(ast, rule.params);
      ast = this.add(ast, rule.params);
      ast = this.cleanBrackets(ast);
      rule.params = brackets.stringify(ast);
    }
    /**
       * Check global options
       */
    ;
  
    _proto.disabled = function disabled(node) {
      if (!this.all.options.grid) {
        if (node.prop === 'display' && node.value.includes('grid')) {
          return true;
        }
  
        if (node.prop.includes('grid') || node.prop === 'justify-items') {
          return true;
        }
      }
  
      if (this.all.options.flexbox === false) {
        if (node.prop === 'display' && node.value.includes('flex')) {
          return true;
        }
  
        var other = ['order', 'justify-content', 'align-items', 'align-content'];
  
        if (node.prop.includes('flex') || other.includes(node.prop)) {
          return true;
        }
      }
  
      return false;
    };
  
    return Supports;
  }();
  
  module.exports = Supports;