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- /*
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
- #include <react/core/ShadowNode.h>
- #include <react/core/ShadowNodeFragment.h>
- namespace facebook {
- namespace react {
- /**
- * Problem Description: because of C++ State, the React Native C++ ShadowTree
- * can diverge from the ReactJS ShadowTree; ReactJS communicates all tree
- * changes to C++, but C++ state commits are not propagated to ReactJS (ReactJS
- * may or may not clone nodes with state changes, but it has no way of knowing
- * if it /should/ clone those nodes; so those clones may never happen). This
- * causes a number of problems. This function resolves the problem by taking a
- * candidate tree being committed, and sees if any State changes need to be
- * applied to it. If any changes need to be made, a new ShadowNode is returned;
- * otherwise, nullptr is returned if the node is already consistent with the
- * latest tree, including all state changes.
- *
- * This should be called during the commit phase, pre-layout and pre-diff.
- */
- UnsharedShadowNode reconcileStateWithTree(
- ShadowNode const *newNode,
- SharedShadowNode committedNode);
- } // namespace react
- } // namespace facebook
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