mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Joshua Gross
09b9422516
Summary: Unfortunately, parsing some props requires stateful context - namely, PlatformColor on Android. We explored several different options but they all seemed inferior to the approach of using ContextContainer, and most would require using global state. By introducing this change everywhere as early as possible, we can avoid later pain. It is likely that some prop, on some platform, will require this mechanism. We'll be ready for it! Because we can pass a constref of the ContextContainer through to all props and because the context and context data is never retained by prop parsers, perf and memory hit should be ~0. This diff contains core changes only. Leaf changes to all props structs and conversions files will be in next diff(s). Changelog: [Internal] Reviewed By: mdvacca Differential Revision: D29838789 fbshipit-source-id: f5090e7f02eb6e8fbe0ef4dd201e7d12104a3e3c
95 lines
2.9 KiB
C++
95 lines
2.9 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 <better/map.h>
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#include <better/mutex.h>
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#include <react/renderer/componentregistry/ComponentDescriptorProvider.h>
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#include <react/renderer/core/ComponentDescriptor.h>
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#include <react/utils/ContextContainer.h>
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namespace facebook {
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namespace react {
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class ComponentDescriptorProviderRegistry;
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class ComponentDescriptorRegistry;
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using SharedComponentDescriptorRegistry =
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std::shared_ptr<const ComponentDescriptorRegistry>;
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/*
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* Registry of particular `ComponentDescriptor`s.
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*/
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class ComponentDescriptorRegistry {
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public:
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using Shared = std::shared_ptr<const ComponentDescriptorRegistry>;
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/*
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* Creates an object with stored `ComponentDescriptorParameters` which will
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* be used later to create `ComponentDescriptor`s.
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*/
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ComponentDescriptorRegistry(
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ComponentDescriptorParameters const ¶meters,
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ComponentDescriptorProviderRegistry const &providerRegistry,
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ContextContainer::Shared contextContainer);
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/*
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* This is broken. Please do not use.
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* If you requesting a ComponentDescriptor and unsure that it's there, you are
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* doing something wrong.
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*/
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ComponentDescriptor const *
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findComponentDescriptorByHandle_DO_NOT_USE_THIS_IS_BROKEN(
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ComponentHandle componentHandle) const;
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ComponentDescriptor const &at(std::string const &componentName) const;
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ComponentDescriptor const &at(ComponentHandle componentHandle) const;
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bool hasComponentDescriptorAt(ComponentHandle componentHandle) const;
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ShadowNode::Shared createNode(
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Tag tag,
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std::string const &viewName,
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SurfaceId surfaceId,
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folly::dynamic const &props,
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SharedEventTarget const &eventTarget) const;
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void setFallbackComponentDescriptor(SharedComponentDescriptor descriptor);
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ComponentDescriptor::Shared getFallbackComponentDescriptor() const;
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private:
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friend class ComponentDescriptorProviderRegistry;
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void registerComponentDescriptor(
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SharedComponentDescriptor componentDescriptor) const;
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/*
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* Creates a `ComponentDescriptor` using specified
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* `ComponentDescriptorProvider` and stored `ComponentDescriptorParameters`,
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* and then adds that to the registry.
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* To be used by `ComponentDescriptorProviderRegistry` only.
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* Thread safe.
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*/
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void add(ComponentDescriptorProvider componentDescriptorProvider) const;
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mutable better::shared_mutex mutex_;
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mutable better::map<ComponentHandle, SharedComponentDescriptor>
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_registryByHandle;
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mutable better::map<std::string, SharedComponentDescriptor> _registryByName;
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ComponentDescriptor::Shared _fallbackComponentDescriptor;
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ComponentDescriptorParameters parameters_{};
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ComponentDescriptorProviderRegistry const &providerRegistry_;
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ContextContainer::Shared contextContainer_;
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};
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} // namespace react
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} // namespace facebook
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