prepack/lib/react/ReactPropsSet.js

Execute a JS bundle, serialize global state and side effects to a snapshot that can be quickly restored.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.ReactPropsSet = void 0;

var _realm = require("../realm.js");

var _index = require("../values/index.js");

var _invariant = _interopRequireDefault(require("../invariant.js"));

var _ReactEquivalenceSet = require("./ReactEquivalenceSet.js");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Copyright (c) 2017-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */
class ReactPropsSet {
  constructor(realm, reactEquivalenceSet) {
    this.realm = realm;
    this.reactEquivalenceSet = reactEquivalenceSet;
  }

  add(props, visitedValues) {
    if (!visitedValues) visitedValues = new Set();
    let reactEquivalenceSet = this.reactEquivalenceSet;
    let currentMap = reactEquivalenceSet.reactPropsRoot;
    let result;

    for (let [propName] of props.properties) {
      currentMap = reactEquivalenceSet.getKey(propName, currentMap, visitedValues);
      result = reactEquivalenceSet.getEquivalentPropertyValue(props, propName, currentMap, visitedValues);
      currentMap = result.map;
    }

    let temporalAlias = props.temporalAlias;

    if (temporalAlias !== undefined) {
      currentMap = reactEquivalenceSet.getKey(_ReactEquivalenceSet.temporalAliasSymbol, currentMap, visitedValues);
      result = reactEquivalenceSet.getTemporalAliasValue(temporalAlias, currentMap, visitedValues);
      currentMap = result.map;
    }

    if (result === undefined) {
      // If we have a temporalAlias, we can never return an empty object
      if (temporalAlias === undefined && this.realm.react.emptyObject !== undefined) {
        return this.realm.react.emptyObject;
      }

      return props;
    }

    if (result.value === null) {
      result.value = props;
    }

    (0, _invariant.default)(result.value instanceof _index.ObjectValue);
    return result.value;
  }

}

exports.ReactPropsSet = ReactPropsSet;
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