"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.StyleProvider = StyleProvider;
exports.default = void 0;
var _react = require("react");
var _react2 = require("@emotion/react");
var _cache = _interopRequireDefault(require("@emotion/cache"));
var uuid = _interopRequireWildcard(require("uuid"));
function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
/**
 * External dependencies
 */

const uuidCache = new Set();
// Use a weak map so that when the container is detached it's automatically
// dereferenced to avoid memory leak.
const containerCacheMap = new WeakMap();
const memoizedCreateCacheWithContainer = container => {
  if (containerCacheMap.has(container)) {
    return containerCacheMap.get(container);
  }

  // Emotion only accepts alphabetical and hyphenated keys so we just
  // strip the numbers from the UUID. It _should_ be fine.
  let key = uuid.v4().replace(/[0-9]/g, '');
  while (uuidCache.has(key)) {
    key = uuid.v4().replace(/[0-9]/g, '');
  }
  uuidCache.add(key);
  const cache = (0, _cache.default)({
    container,
    key
  });
  containerCacheMap.set(container, cache);
  return cache;
};
function StyleProvider(props) {
  const {
    children,
    document
  } = props;
  if (!document) {
    return null;
  }
  const cache = memoizedCreateCacheWithContainer(document.head);
  return (0, _react.createElement)(_react2.CacheProvider, {
    value: cache
  }, children);
}
var _default = StyleProvider;
exports.default = _default;
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