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
74 lines
2.5 KiB
C++
74 lines
2.5 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 <better/mutex.h>
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#include <react/renderer/componentregistry/ComponentDescriptorProvider.h>
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#include <react/renderer/componentregistry/ComponentDescriptorRegistry.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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using ComponentDescriptorProviderRequest =
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std::function<void(ComponentName componentName)>;
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/*
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* Registry of `ComponentDescriptorProvider`s (and managed
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* `ComponentDescriptorRegistry`s). The class maintains a list of
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* `ComponentDescriptorRegistry`s (retaining pointers weakly) and update them
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* accordingly to changes in the provider registry.
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*/
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class ComponentDescriptorProviderRegistry final {
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public:
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/*
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* Adds a `ComponentDescriptorProvider`s and update the managed
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* `ComponentDescriptorRegistry`s accordingly.
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* The methods can be called on any thread.
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*/
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void add(ComponentDescriptorProvider provider) const;
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/*
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* ComponenDescriptorRegistry will call the `request` in case if a component
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* with given name wasn't registered yet.
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* The request handler must register a ComponentDescripor with requested name
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* synchronously during handling the request.
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* The request can be called on any thread.
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* The methods can be called on any thread.
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*/
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void setComponentDescriptorProviderRequest(
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ComponentDescriptorProviderRequest request) const;
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/*
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* Creates managed `ComponentDescriptorRegistry` based on a stored list of
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* `ComponentDescriptorProvider`s and given `ComponentDescriptorParameters`.
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* The methods can be called on any thread.
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*/
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ComponentDescriptorRegistry::Shared createComponentDescriptorRegistry(
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ComponentDescriptorParameters const ¶meters,
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ContextContainer::Shared contextContainer) const;
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private:
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friend class ComponentDescriptorRegistry;
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void request(ComponentName componentName) const;
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mutable better::shared_mutex mutex_;
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mutable std::vector<std::weak_ptr<ComponentDescriptorRegistry const>>
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componentDescriptorRegistries_;
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mutable better::map<ComponentHandle, ComponentDescriptorProvider const>
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componentDescriptorProviders_;
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mutable ComponentDescriptorProviderRequest
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componentDescriptorProviderRequest_;
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};
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} // namespace react
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} // namespace facebook
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