@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(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
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(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == typeof i ? i : String(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 _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); Object.defineProperty(subClass, "prototype", { writable: false }); if (superClass) _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
function _possibleConstructorReturn(self, call) { if (call && (typeof call === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
function _isNativeReflectConstruct() { try { var t = !Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); } catch (t) {} return (_isNativeReflectConstruct = function _isNativeReflectConstruct() { return !!t; })(); }
function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf.bind() : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); } /**
 * 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) {
    _inherits(_class, _Component);
    var _super = _createSuper(_class);
    function _class() {
      _classCallCheck(this, _class);
      return _super.apply(this, arguments);
    }
    _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));
      }
    }]);
    return _class;
  }(_react.Component), _class.displayName = 'Pure', _class.propTypes = {}, _class.defaultProps = {}, _class;
});
var _default = exports["default"] = Pure;