mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Valentin Shergin
d2ae775bf7
Summary: With the change, a new delegate method allows a receiver to alter a new (proposed) shadow tree with another tree by returning the altered tree. We will it use in future diffs to implement Commit Hooks. Changelog: [Internal] Fabric-specific internal change. Reviewed By: sammy-SC Differential Revision: D25221313 fbshipit-source-id: 9f83577d862b713fff71fa365ce660cc1de87c84
45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <react/renderer/mounting/MountingCoordinator.h>
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namespace facebook {
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namespace react {
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class ShadowTree;
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/*
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* Abstract class for ShadowTree's delegate.
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*/
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class ShadowTreeDelegate {
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public:
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/*
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* Called right before a ShadowTree commits a new tree.
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* The receiver can alter a new (proposed) shadow tree with another tree
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* by returning the altered tree.
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* Returning a `nullptr` cancels the commit.
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*/
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virtual RootShadowNode::Unshared shadowTreeWillCommit(
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ShadowTree const &shadowTree,
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RootShadowNode::Shared const &oldRootShadowNode,
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RootShadowNode::Unshared const &newRootShadowNode) const = 0;
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/*
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* Called right after Shadow Tree commit a new state of the tree.
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*/
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virtual void shadowTreeDidFinishTransaction(
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ShadowTree const &shadowTree,
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MountingCoordinator::Shared const &mountingCoordinator) const = 0;
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virtual ~ShadowTreeDelegate() noexcept = default;
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};
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} // namespace react
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} // namespace facebook
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