71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and 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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#include "ComponentBuilder.h"
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#include <utility>
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namespace facebook::react {
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ComponentBuilder::ComponentBuilder(
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ComponentDescriptorRegistry::Shared componentDescriptorRegistry)
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: componentDescriptorRegistry_(std::move(componentDescriptorRegistry)) {};
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std::shared_ptr<ShadowNode> ComponentBuilder::build(
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const ElementFragment& elementFragment) const {
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auto& componentDescriptor =
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componentDescriptorRegistry_->at(elementFragment.componentHandle);
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auto children = std::vector<std::shared_ptr<const ShadowNode>>{};
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children.reserve(elementFragment.children.size());
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for (const auto& childFragment : elementFragment.children) {
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children.push_back(build(childFragment));
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}
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auto family = componentDescriptor.createFamily(
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ShadowNodeFamilyFragment{
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.tag = elementFragment.tag,
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.surfaceId = elementFragment.surfaceId,
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.instanceHandle = nullptr});
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auto initialState =
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componentDescriptor.createInitialState(elementFragment.props, family);
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auto constShadowNode = componentDescriptor.createShadowNode(
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ShadowNodeFragment{
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.props = elementFragment.props,
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.children = std::make_shared<
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const std::vector<std::shared_ptr<const ShadowNode>>>(children),
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.state = initialState},
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family);
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if (elementFragment.stateCallback) {
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auto newState = componentDescriptor.createState(
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*family, elementFragment.stateCallback(initialState));
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constShadowNode = componentDescriptor.cloneShadowNode(
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*constShadowNode,
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ShadowNodeFragment{
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.props = ShadowNodeFragment::propsPlaceholder(),
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.children = ShadowNodeFragment::childrenPlaceholder(),
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.state = newState});
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}
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auto shadowNode = std::const_pointer_cast<ShadowNode>(constShadowNode);
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if (elementFragment.referenceCallback) {
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elementFragment.referenceCallback(shadowNode);
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}
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if (elementFragment.finalizeCallback) {
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elementFragment.finalizeCallback(*shadowNode);
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}
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return shadowNode;
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}
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} // namespace facebook::react
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