react app

react-app/node_modules/react/lib/ReactDefaultBatchingStrategy.js

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+/**
+ * Copyright 2013-2015, 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.
+ *
+ * @providesModule ReactDefaultBatchingStrategy
+ */
+
+'use strict';
+
+var ReactUpdates = require("./ReactUpdates");
+var Transaction = require("./Transaction");
+
+var assign = require("./Object.assign");
+var emptyFunction = require("./emptyFunction");
+
+var RESET_BATCHED_UPDATES = {
+  initialize: emptyFunction,
+  close: function() {
+    ReactDefaultBatchingStrategy.isBatchingUpdates = false;
+  }
+};
+
+var FLUSH_BATCHED_UPDATES = {
+  initialize: emptyFunction,
+  close: ReactUpdates.flushBatchedUpdates.bind(ReactUpdates)
+};
+
+var TRANSACTION_WRAPPERS = [FLUSH_BATCHED_UPDATES, RESET_BATCHED_UPDATES];
+
+function ReactDefaultBatchingStrategyTransaction() {
+  this.reinitializeTransaction();
+}
+
+assign(
+  ReactDefaultBatchingStrategyTransaction.prototype,
+  Transaction.Mixin,
+  {
+    getTransactionWrappers: function() {
+      return TRANSACTION_WRAPPERS;
+    }
+  }
+);
+
+var transaction = new ReactDefaultBatchingStrategyTransaction();
+
+var ReactDefaultBatchingStrategy = {
+  isBatchingUpdates: false,
+
+  /**
+   * Call the provided function in a context within which calls to `setState`
+   * and friends are batched such that components aren't updated unnecessarily.
+   */
+  batchedUpdates: function(callback, a, b, c, d) {
+    var alreadyBatchingUpdates = ReactDefaultBatchingStrategy.isBatchingUpdates;
+
+    ReactDefaultBatchingStrategy.isBatchingUpdates = true;
+
+    // The code is written this way to avoid extra allocations
+    if (alreadyBatchingUpdates) {
+      callback(a, b, c, d);
+    } else {
+      transaction.perform(callback, null, a, b, c, d);
+    }
+  }
+};
+
+module.exports = ReactDefaultBatchingStrategy;