mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Valentin Shergin
b39c75f20e
Summary: It makes perfect sense because `Builder` builds totally new shadow trees, so those are not sealed or used by anyone yet. Assigning it to const shared pointer will do logical sealing (and it does not requires const-cast). Fewer const-casts in the code, fewer bugs. Changelog: [Internal] Fabric-specific internal change. Reviewed By: sammy-SC Differential Revision: D19596284 fbshipit-source-id: 75d1c706034958ba7e4bc80a68af75a57c46eb6f
60 lines
1.6 KiB
C++
60 lines
1.6 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 <memory>
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#include <react/core/ComponentDescriptor.h>
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#include <react/core/ShadowNode.h>
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#include <react/core/ShadowNodeFamilyFragment.h>
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#include <react/core/ShadowNodeFragment.h>
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#include <react/uimanager/ComponentDescriptorRegistry.h>
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#include <react/element/Element.h>
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#include <react/element/ElementFragment.h>
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namespace facebook {
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namespace react {
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/*
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* Build `ShadowNode` trees with a given given `Element` trees.
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*/
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class ComponentBuilder final {
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public:
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ComponentBuilder(
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ComponentDescriptorRegistry::Shared const &componentDescriptorRegistry);
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/*
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* Copyable and movable.
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*/
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ComponentBuilder(ComponentBuilder const &componentBuilder) = default;
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ComponentBuilder(ComponentBuilder &&componentBuilder) noexcept = default;
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ComponentBuilder &operator=(ComponentBuilder const &other) = default;
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ComponentBuilder &operator=(ComponentBuilder &&other) = default;
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/*
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* Builds a `ShadowNode` tree with given `Element` tree using stored
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* `ComponentDescriptorRegistry`.
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*/
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template <typename ShadowNodeT>
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std::shared_ptr<ShadowNodeT> build(Element<ShadowNodeT> element) const {
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return std::static_pointer_cast<ShadowNodeT>(build(element.fragment_));
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}
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private:
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/*
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* Internal, type-erased version of `build`.
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*/
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ShadowNode::Unshared build(ElementFragment const &elementFragment) const;
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ComponentDescriptorRegistry::Shared componentDescriptorRegistry_;
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};
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} // namespace react
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} // namespace facebook
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