node_modules

1 files changed, 153 insertions, 0 deletions

diff --git a/node_modules/react-dom/lib/ReactChildReconciler.js b/node_modules/react-dom/lib/ReactChildReconciler.js
new file mode 100644
index 000000000..cf37bd63b
--- /dev/null
+++ b/node_modules/react-dom/lib/ReactChildReconciler.js
@@ -0,0 +1,153 @@
+/**
+ * Copyright 2014-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.
+ *
+ */
+
+'use strict';
+
+var ReactReconciler = require('./ReactReconciler');
+
+var instantiateReactComponent = require('./instantiateReactComponent');
+var KeyEscapeUtils = require('./KeyEscapeUtils');
+var shouldUpdateReactComponent = require('./shouldUpdateReactComponent');
+var traverseAllChildren = require('./traverseAllChildren');
+var warning = require('fbjs/lib/warning');
+
+var ReactComponentTreeHook;
+
+if (typeof process !== 'undefined' && process.env && process.env.NODE_ENV === 'test') {
+  // Temporary hack.
+  // Inline requires don't work well with Jest:
+  // https://github.com/facebook/react/issues/7240
+  // Remove the inline requires when we don't need them anymore:
+  // https://github.com/facebook/react/pull/7178
+  ReactComponentTreeHook = require('react/lib/ReactComponentTreeHook');
+}
+
+function instantiateChild(childInstances, child, name, selfDebugID) {
+  // We found a component instance.
+  var keyUnique = childInstances[name] === undefined;
+  if (process.env.NODE_ENV !== 'production') {
+    if (!ReactComponentTreeHook) {
+      ReactComponentTreeHook = require('react/lib/ReactComponentTreeHook');
+    }
+    if (!keyUnique) {
+      process.env.NODE_ENV !== 'production' ? warning(false, 'flattenChildren(...): Encountered two children with the same key, ' + '`%s`. Child keys must be unique; when two children share a key, only ' + 'the first child will be used.%s', KeyEscapeUtils.unescape(name), ReactComponentTreeHook.getStackAddendumByID(selfDebugID)) : void 0;
+    }
+  }
+  if (child != null && keyUnique) {
+    childInstances[name] = instantiateReactComponent(child, true);
+  }
+}
+
+/**
+ * ReactChildReconciler provides helpers for initializing or updating a set of
+ * children. Its output is suitable for passing it onto ReactMultiChild which
+ * does diffed reordering and insertion.
+ */
+var ReactChildReconciler = {
+  /**
+   * Generates a "mount image" for each of the supplied children. In the case
+   * of `ReactDOMComponent`, a mount image is a string of markup.
+   *
+   * @param {?object} nestedChildNodes Nested child maps.
+   * @return {?object} A set of child instances.
+   * @internal
+   */
+  instantiateChildren: function (nestedChildNodes, transaction, context, selfDebugID // 0 in production and for roots
+  ) {
+    if (nestedChildNodes == null) {
+      return null;
+    }
+    var childInstances = {};
+
+    if (process.env.NODE_ENV !== 'production') {
+      traverseAllChildren(nestedChildNodes, function (childInsts, child, name) {
+        return instantiateChild(childInsts, child, name, selfDebugID);
+      }, childInstances);
+    } else {
+      traverseAllChildren(nestedChildNodes, instantiateChild, childInstances);
+    }
+    return childInstances;
+  },
+
+  /**
+   * Updates the rendered children and returns a new set of children.
+   *
+   * @param {?object} prevChildren Previously initialized set of children.
+   * @param {?object} nextChildren Flat child element maps.
+   * @param {ReactReconcileTransaction} transaction
+   * @param {object} context
+   * @return {?object} A new set of child instances.
+   * @internal
+   */
+  updateChildren: function (prevChildren, nextChildren, mountImages, removedNodes, transaction, hostParent, hostContainerInfo, context, selfDebugID // 0 in production and for roots
+  ) {
+    // We currently don't have a way to track moves here but if we use iterators
+    // instead of for..in we can zip the iterators and check if an item has
+    // moved.
+    // TODO: If nothing has changed, return the prevChildren object so that we
+    // can quickly bailout if nothing has changed.
+    if (!nextChildren && !prevChildren) {
+      return;
+    }
+    var name;
+    var prevChild;
+    for (name in nextChildren) {
+      if (!nextChildren.hasOwnProperty(name)) {
+        continue;
+      }
+      prevChild = prevChildren && prevChildren[name];
+      var prevElement = prevChild && prevChild._currentElement;
+      var nextElement = nextChildren[name];
+      if (prevChild != null && shouldUpdateReactComponent(prevElement, nextElement)) {
+        ReactReconciler.receiveComponent(prevChild, nextElement, transaction, context);
+        nextChildren[name] = prevChild;
+      } else {
+        if (prevChild) {
+          removedNodes[name] = ReactReconciler.getHostNode(prevChild);
+          ReactReconciler.unmountComponent(prevChild, false);
+        }
+        // The child must be instantiated before it's mounted.
+        var nextChildInstance = instantiateReactComponent(nextElement, true);
+        nextChildren[name] = nextChildInstance;
+        // Creating mount image now ensures refs are resolved in right order
+        // (see https://github.com/facebook/react/pull/7101 for explanation).
+        var nextChildMountImage = ReactReconciler.mountComponent(nextChildInstance, transaction, hostParent, hostContainerInfo, context, selfDebugID);
+        mountImages.push(nextChildMountImage);
+      }
+    }
+    // Unmount children that are no longer present.
+    for (name in prevChildren) {
+      if (prevChildren.hasOwnProperty(name) && !(nextChildren && nextChildren.hasOwnProperty(name))) {
+        prevChild = prevChildren[name];
+        removedNodes[name] = ReactReconciler.getHostNode(prevChild);
+        ReactReconciler.unmountComponent(prevChild, false);
+      }
+    }
+  },
+
+  /**
+   * Unmounts all rendered children. This should be used to clean up children
+   * when this component is unmounted.
+   *
+   * @param {?object} renderedChildren Previously initialized set of children.
+   * @internal
+   */
+  unmountChildren: function (renderedChildren, safely) {
+    for (var name in renderedChildren) {
+      if (renderedChildren.hasOwnProperty(name)) {
+        var renderedChild = renderedChildren[name];
+        ReactReconciler.unmountComponent(renderedChild, safely);
+      }
+    }
+  }
+
+};
+
+module.exports = ReactChildReconciler;
\ No newline at end of file