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packages/react-reconciler/src/ReactEventPriorities.js
67 строк
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Josh Story
[Fiber] Move updatePriority tracking to renderers (#28751)
08 апр 2024, 18:53
Не верифицирован
08 апр 2024, 18:53
8e1462e
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/** * Copyright (c) Meta Platforms, Inc. and affiliates. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. * * @flow */ import type {Lane, Lanes} from './ReactFiberLane'; import { NoLane, SyncLane, InputContinuousLane, DefaultLane, IdleLane, getHighestPriorityLane, includesNonIdleWork, } from './ReactFiberLane'; export opaque type EventPriority = Lane; export const NoEventPriority: EventPriority = NoLane; export const DiscreteEventPriority: EventPriority = SyncLane; export const ContinuousEventPriority: EventPriority = InputContinuousLane; export const DefaultEventPriority: EventPriority = DefaultLane; export const IdleEventPriority: EventPriority = IdleLane; export function higherEventPriority( a: EventPriority, b: EventPriority, ): EventPriority { return a !== 0 && a < b ? a : b; } export function lowerEventPriority( a: EventPriority, b: EventPriority, ): EventPriority { return a === 0 || a > b ? a : b; } export function isHigherEventPriority( a: EventPriority, b: EventPriority, ): boolean { return a !== 0 && a < b; } export function eventPriorityToLane(updatePriority: EventPriority): Lane { return updatePriority; } export function lanesToEventPriority(lanes: Lanes): EventPriority { const lane = getHighestPriorityLane(lanes); if (!isHigherEventPriority(DiscreteEventPriority, lane)) { return DiscreteEventPriority; } if (!isHigherEventPriority(ContinuousEventPriority, lane)) { return ContinuousEventPriority; } if (includesNonIdleWork(lane)) { return DefaultEventPriority; } return IdleEventPriority; }