51 строка
1.5 KiB
JavaScript
51 строка
1.5 KiB
JavaScript
/**
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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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* @flow strict-local
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* @format
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*/
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import Pressability, {
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type EventHandlers,
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type PressabilityConfig,
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} from './Pressability';
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import {useEffect, useRef} from 'react';
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/**
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* Creates a persistent instance of `Pressability` that automatically configures
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* itself and resets. Accepts null `config` to support lazy initialization. Once
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* initialized, will not un-initialize until the component has been unmounted.
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*/
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export default function usePressability(
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config: ?PressabilityConfig,
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): ?EventHandlers {
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const pressabilityRef = useRef<?Pressability>(null);
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if (config != null && pressabilityRef.current == null) {
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pressabilityRef.current = new Pressability(config);
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}
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const pressability = pressabilityRef.current;
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// On the initial mount, this is a no-op. On updates, `pressability` will be
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// re-configured to use the new configuration.
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useEffect(() => {
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if (config != null && pressability != null) {
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pressability.configure(config);
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}
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}, [config, pressability]);
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// On unmount, reset pending state and timers inside `pressability`. This is
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// a separate effect because we do not want to reset when `config` changes.
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useEffect(() => {
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if (pressability != null) {
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return () => {
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pressability.reset();
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};
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}
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}, [pressability]);
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return pressability == null ? null : pressability.getEventHandlers();
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}
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