@enact/ui/internal/Pure/Pure.js

A collection of simplified unstyled cross-platform UI components for Enact

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = exports.Pure = void 0;
var _hoc = _interopRequireDefault(require("@enact/core/hoc"));
var _react = require("react");
var _jsxRuntime = require("react/jsx-runtime");
function _interopRequireDefault(e) { return e && e.__esModule ? e : { "default": e }; }
function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { _defineProperty(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
function _defineProperty(e, r, t) { return (r = _toPropertyKey(r)) in e ? Object.defineProperty(e, r, { value: t, enumerable: !0, configurable: !0, writable: !0 }) : e[r] = t, e; }
function _classCallCheck(a, n) { if (!(a instanceof n)) throw new TypeError("Cannot call a class as a function"); }
function _defineProperties(e, r) { for (var t = 0; t < r.length; t++) { var o = r[t]; o.enumerable = o.enumerable || !1, o.configurable = !0, "value" in o && (o.writable = !0), Object.defineProperty(e, _toPropertyKey(o.key), o); } }
function _createClass(e, r, t) { return r && _defineProperties(e.prototype, r), t && _defineProperties(e, t), Object.defineProperty(e, "prototype", { writable: !1 }), e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == typeof i ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != typeof t || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != typeof i) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
function _callSuper(t, o, e) { return o = _getPrototypeOf(o), _possibleConstructorReturn(t, _isNativeReflectConstruct() ? Reflect.construct(o, e || [], _getPrototypeOf(t).constructor) : o.apply(t, e)); }
function _possibleConstructorReturn(t, e) { if (e && ("object" == typeof e || "function" == typeof e)) return e; if (void 0 !== e) throw new TypeError("Derived constructors may only return object or undefined"); return _assertThisInitialized(t); }
function _assertThisInitialized(e) { if (void 0 === e) throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); return e; }
function _isNativeReflectConstruct() { try { var t = !Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); } catch (t) {} return (_isNativeReflectConstruct = function _isNativeReflectConstruct() { return !!t; })(); }
function _getPrototypeOf(t) { return _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf.bind() : function (t) { return t.__proto__ || Object.getPrototypeOf(t); }, _getPrototypeOf(t); }
function _inherits(t, e) { if ("function" != typeof e && null !== e) throw new TypeError("Super expression must either be null or a function"); t.prototype = Object.create(e && e.prototype, { constructor: { value: t, writable: !0, configurable: !0 } }), Object.defineProperty(t, "prototype", { writable: !1 }), e && _setPrototypeOf(t, e); }
function _setPrototypeOf(t, e) { return _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function (t, e) { return t.__proto__ = e, t; }, _setPrototypeOf(t, e); } /**
 * Exports the {@link ui/internal/Pure.Pure} higher-order component (HOC).
 *
 * @module ui/internal/Pure
 * @private
 */ /**
 * Default config for {@link ui/internal/Pure.Pure}.
 *
 * @memberof ui/internal/Pure.Pure
 * @hocconfig
 */
var defaultConfig = {
  /**
   * Configures the comparators used to test for prop changes
   *
   * @type {Object}
   * @memberof ui/internal/Pure.Pure.defaultConfig
   */
  propComparators: {
    '*': function _(a, b) {
      return a === b;
    }
  }
};

/**
 * Implements `shouldComponentUpdate` based on property change determination. By default, props are
 * shallowly compared for strict equality
 *
 * Custom comparators can be provided via the `propComparators` config property which accepts an
 * object mapping property names to comparator functions. To override the default comparator, use
 * the key, `'*'`.
 *
 * ```
 * const PureComponent = Pure(
 *     // Overrides the comparator for `count`. All other props will use the default comparators
 *     propComparators: {
 *         // For example, count is compared using loose equality allowing '5' to equal 5
 *         count: (a, b) => a == b
 *     },
 *     Component
 * )
 * ```
 *
 * @class Pure
 * @memberof ui/internal/Pure
 * @hoc
 * @private
 */
var Pure = exports.Pure = (0, _hoc["default"])(defaultConfig, function (config, Wrapped) {
  var _Class;
  var propComparators = config.propComparators;
  return _Class = /*#__PURE__*/function (_Component) {
    function _Class() {
      _classCallCheck(this, _Class);
      return _callSuper(this, _Class, arguments);
    }
    _inherits(_Class, _Component);
    return _createClass(_Class, [{
      key: "shouldComponentUpdate",
      value: function shouldComponentUpdate(nextProps) {
        return this.hasChanged(this.props, nextProps, propComparators);
      }
    }, {
      key: "hasChanged",
      value: function hasChanged(current, next, comparators) {
        var propKeys = Object.keys(current);
        var nextKeys = Object.keys(next);

        // early bail out if the objects have a different number of keys
        if (propKeys.length !== nextKeys.length) {
          return true;
        }
        var hasOwn = Object.prototype.hasOwnProperty.bind(current);
        for (var i = 0; i < nextKeys.length; i++) {
          var prop = nextKeys[i];
          var comp = comparators[prop] || comparators['*'];
          if (!hasOwn(prop) || !comp(current[prop], next[prop])) {
            return true;
          }
        }
        return false;
      }
    }, {
      key: "render",
      value: function render() {
        return /*#__PURE__*/(0, _jsxRuntime.jsx)(Wrapped, _objectSpread({}, this.props));
      }
    }]);
  }(_react.Component), _Class.displayName = 'Pure', _Class.propTypes = {}, _Class.defaultProps = {}, _Class;
});
var _default = exports["default"] = Pure;