87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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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 <fabric/core/Props.h>
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#include <fabric/core/ShadowNode.h>
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namespace facebook {
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namespace react {
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/*
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* Base templace class for all `ShadowNode`s which connects exact `ShadowNode`
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* type with exact `Props` type.
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* `ConcreteShadowNode` is a default implementation of `ShadowNode` interface
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* with many handy features.
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*/
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template <typename PropsT>
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class ConcreteShadowNode: public ShadowNode {
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static_assert(std::is_base_of<Props, PropsT>::value, "PropsT must be a descendant of Props");
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public:
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using ConcreteProps = PropsT;
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using SharedConcreteProps = std::shared_ptr<const PropsT>;
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using SharedConcreteShadowNode = std::shared_ptr<const ConcreteShadowNode>;
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static const SharedConcreteProps Props(const RawProps &rawProps, const SharedProps &baseProps = nullptr) {
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if (!baseProps) {
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auto props = std::make_shared<PropsT>();
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props->apply(rawProps);
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return props;
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}
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auto concreteBaseProps = std::dynamic_pointer_cast<const PropsT>(baseProps);
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auto props = std::make_shared<PropsT>(*concreteBaseProps);
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props->apply(rawProps);
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return props;
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}
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static const SharedConcreteProps defaultSharedProps() {
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static const SharedConcreteProps defaultSharedProps = std::make_shared<PropsT>();
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return defaultSharedProps;
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}
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ConcreteShadowNode(
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const Tag &tag,
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const Tag &rootTag,
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const InstanceHandle &instanceHandle,
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const SharedConcreteProps &props = ConcreteShadowNode::defaultSharedProps(),
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const SharedShadowNodeSharedList &children = ShadowNode::emptySharedShadowNodeSharedList()
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):
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ShadowNode(
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tag,
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rootTag,
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instanceHandle,
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(SharedProps)props,
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children
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) {};
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ConcreteShadowNode(
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const SharedConcreteShadowNode &shadowNode,
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const SharedProps &props = nullptr,
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const SharedShadowNodeSharedList &children = nullptr
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):
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ShadowNode(
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shadowNode,
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(SharedProps)props,
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children
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) {}
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virtual ComponentHandle getComponentHandle() const {
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return typeid(*this).hash_code();
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}
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const SharedConcreteProps getProps() const {
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return std::static_pointer_cast<const PropsT>(props_);
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}
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};
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} // namespace react
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} // namespace facebook
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