node_modules

1 files changed, 167 insertions, 0 deletions

diff --git a/node_modules/react-dom/lib/ReactReconciler.js b/node_modules/react-dom/lib/ReactReconciler.js
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@@ -0,0 +1,167 @@
+/**
+ * Copyright 2013-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 ReactRef = require('./ReactRef');
+var ReactInstrumentation = require('./ReactInstrumentation');
+
+var warning = require('fbjs/lib/warning');
+
+/**
+ * Helper to call ReactRef.attachRefs with this composite component, split out
+ * to avoid allocations in the transaction mount-ready queue.
+ */
+function attachRefs() {
+  ReactRef.attachRefs(this, this._currentElement);
+}
+
+var ReactReconciler = {
+
+  /**
+   * Initializes the component, renders markup, and registers event listeners.
+   *
+   * @param {ReactComponent} internalInstance
+   * @param {ReactReconcileTransaction|ReactServerRenderingTransaction} transaction
+   * @param {?object} the containing host component instance
+   * @param {?object} info about the host container
+   * @return {?string} Rendered markup to be inserted into the DOM.
+   * @final
+   * @internal
+   */
+  mountComponent: function (internalInstance, transaction, hostParent, hostContainerInfo, context, parentDebugID // 0 in production and for roots
+  ) {
+    if (process.env.NODE_ENV !== 'production') {
+      if (internalInstance._debugID !== 0) {
+        ReactInstrumentation.debugTool.onBeforeMountComponent(internalInstance._debugID, internalInstance._currentElement, parentDebugID);
+      }
+    }
+    var markup = internalInstance.mountComponent(transaction, hostParent, hostContainerInfo, context, parentDebugID);
+    if (internalInstance._currentElement && internalInstance._currentElement.ref != null) {
+      transaction.getReactMountReady().enqueue(attachRefs, internalInstance);
+    }
+    if (process.env.NODE_ENV !== 'production') {
+      if (internalInstance._debugID !== 0) {
+        ReactInstrumentation.debugTool.onMountComponent(internalInstance._debugID);
+      }
+    }
+    return markup;
+  },
+
+  /**
+   * Returns a value that can be passed to
+   * ReactComponentEnvironment.replaceNodeWithMarkup.
+   */
+  getHostNode: function (internalInstance) {
+    return internalInstance.getHostNode();
+  },
+
+  /**
+   * Releases any resources allocated by `mountComponent`.
+   *
+   * @final
+   * @internal
+   */
+  unmountComponent: function (internalInstance, safely) {
+    if (process.env.NODE_ENV !== 'production') {
+      if (internalInstance._debugID !== 0) {
+        ReactInstrumentation.debugTool.onBeforeUnmountComponent(internalInstance._debugID);
+      }
+    }
+    ReactRef.detachRefs(internalInstance, internalInstance._currentElement);
+    internalInstance.unmountComponent(safely);
+    if (process.env.NODE_ENV !== 'production') {
+      if (internalInstance._debugID !== 0) {
+        ReactInstrumentation.debugTool.onUnmountComponent(internalInstance._debugID);
+      }
+    }
+  },
+
+  /**
+   * Update a component using a new element.
+   *
+   * @param {ReactComponent} internalInstance
+   * @param {ReactElement} nextElement
+   * @param {ReactReconcileTransaction} transaction
+   * @param {object} context
+   * @internal
+   */
+  receiveComponent: function (internalInstance, nextElement, transaction, context) {
+    var prevElement = internalInstance._currentElement;
+
+    if (nextElement === prevElement && context === internalInstance._context) {
+      // Since elements are immutable after the owner is rendered,
+      // we can do a cheap identity compare here to determine if this is a
+      // superfluous reconcile. It's possible for state to be mutable but such
+      // change should trigger an update of the owner which would recreate
+      // the element. We explicitly check for the existence of an owner since
+      // it's possible for an element created outside a composite to be
+      // deeply mutated and reused.
+
+      // TODO: Bailing out early is just a perf optimization right?
+      // TODO: Removing the return statement should affect correctness?
+      return;
+    }
+
+    if (process.env.NODE_ENV !== 'production') {
+      if (internalInstance._debugID !== 0) {
+        ReactInstrumentation.debugTool.onBeforeUpdateComponent(internalInstance._debugID, nextElement);
+      }
+    }
+
+    var refsChanged = ReactRef.shouldUpdateRefs(prevElement, nextElement);
+
+    if (refsChanged) {
+      ReactRef.detachRefs(internalInstance, prevElement);
+    }
+
+    internalInstance.receiveComponent(nextElement, transaction, context);
+
+    if (refsChanged && internalInstance._currentElement && internalInstance._currentElement.ref != null) {
+      transaction.getReactMountReady().enqueue(attachRefs, internalInstance);
+    }
+
+    if (process.env.NODE_ENV !== 'production') {
+      if (internalInstance._debugID !== 0) {
+        ReactInstrumentation.debugTool.onUpdateComponent(internalInstance._debugID);
+      }
+    }
+  },
+
+  /**
+   * Flush any dirty changes in a component.
+   *
+   * @param {ReactComponent} internalInstance
+   * @param {ReactReconcileTransaction} transaction
+   * @internal
+   */
+  performUpdateIfNecessary: function (internalInstance, transaction, updateBatchNumber) {
+    if (internalInstance._updateBatchNumber !== updateBatchNumber) {
+      // The component's enqueued batch number should always be the current
+      // batch or the following one.
+      process.env.NODE_ENV !== 'production' ? warning(internalInstance._updateBatchNumber == null || internalInstance._updateBatchNumber === updateBatchNumber + 1, 'performUpdateIfNecessary: Unexpected batch number (current %s, ' + 'pending %s)', updateBatchNumber, internalInstance._updateBatchNumber) : void 0;
+      return;
+    }
+    if (process.env.NODE_ENV !== 'production') {
+      if (internalInstance._debugID !== 0) {
+        ReactInstrumentation.debugTool.onBeforeUpdateComponent(internalInstance._debugID, internalInstance._currentElement);
+      }
+    }
+    internalInstance.performUpdateIfNecessary(transaction);
+    if (process.env.NODE_ENV !== 'production') {
+      if (internalInstance._debugID !== 0) {
+        ReactInstrumentation.debugTool.onUpdateComponent(internalInstance._debugID);
+      }
+    }
+  }
+
+};
+
+module.exports = ReactReconciler;
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