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https://github.com/facebook/react.git
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Clement Hoang
94f44aeba7
* Change prettier dependency in package.json version 1.8.1 * Update yarn.lock * Apply prettier changes * Fix ReactDOMServerIntegration-test.js * Fix test for ReactDOMComponent-test.js
59 lines
1.6 KiB
JavaScript
59 lines
1.6 KiB
JavaScript
/**
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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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* @flow
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*/
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import type {
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ReactNativeBaseComponentViewConfig,
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ViewConfigGetter,
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} from './ReactNativeTypes';
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import invariant from 'fbjs/lib/invariant';
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const viewConfigCallbacks = new Map();
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const viewConfigs = new Map();
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/**
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* Registers a native view/component by name.
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* A callback is provided to load the view config from UIManager.
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* The callback is deferred until the view is actually rendered.
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* This is done to avoid causing Prepack deopts.
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*/
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export function register(name: string, callback: ViewConfigGetter): string {
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invariant(
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!viewConfigCallbacks.has(name),
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'Tried to register two views with the same name %s',
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name,
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);
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viewConfigCallbacks.set(name, callback);
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return name;
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}
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/**
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* Retrieves a config for the specified view.
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* If this is the first time the view has been used,
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* This configuration will be lazy-loaded from UIManager.
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*/
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export function get(name: string): ReactNativeBaseComponentViewConfig {
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let viewConfig;
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if (!viewConfigs.has(name)) {
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const callback = viewConfigCallbacks.get(name);
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invariant(
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typeof callback === 'function',
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'View config not found for name %s',
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name,
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);
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viewConfigCallbacks.set(name, null);
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viewConfig = callback();
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viewConfigs.set(name, viewConfig);
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} else {
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viewConfig = viewConfigs.get(name);
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}
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invariant(viewConfig, 'View config not found for name %s', name);
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return viewConfig;
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}
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