| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | * |
| 7 | * @flow strict |
| 8 | */ |
| 9 | |
| 10 | import * as Scheduler from './Scheduler'; |
| 11 | import type {Callback, Task} from './Scheduler'; |
| 12 | import type {PriorityLevel} from '../SchedulerPriorities'; |
| 13 | import typeof * as PriorityLevels from '../SchedulerPriorities'; |
| 14 | import typeof * as SchedulerExportsType from './Scheduler'; |
| 15 | import typeof * as SchedulerNativeExportsType from './SchedulerNative'; |
| 16 | |
| 17 | // This type is supposed to reflect the actual methods and arguments currently supported by the C++ implementation: |
| 18 | // https://github.com/facebook/react-native/blob/main/packages/react-native/ReactCommon/react/renderer/runtimescheduler/RuntimeSchedulerBinding.cpp |
| 19 | type NativeSchedulerType = { |
| 20 | unstable_ImmediatePriority: PriorityLevels['ImmediatePriority'], |
| 21 | unstable_UserBlockingPriority: PriorityLevels['UserBlockingPriority'], |
| 22 | unstable_NormalPriority: PriorityLevels['NormalPriority'], |
| 23 | unstable_IdlePriority: PriorityLevels['IdlePriority'], |
| 24 | unstable_LowPriority: PriorityLevels['LowPriority'], |
| 25 | unstable_scheduleCallback: ( |
| 26 | priorityLevel: PriorityLevel, |
| 27 | callback: Callback, |
| 28 | ) => Task, |
| 29 | unstable_cancelCallback: (task: Task) => void, |
| 30 | unstable_getCurrentPriorityLevel: () => PriorityLevel, |
| 31 | unstable_shouldYield: () => boolean, |
| 32 | unstable_requestPaint: () => void, |
| 33 | unstable_now: () => DOMHighResTimeStamp, |
| 34 | }; |
| 35 | |
| 36 | declare const nativeRuntimeScheduler: void | NativeSchedulerType; |
| 37 | |
| 38 | export const unstable_UserBlockingPriority: PriorityLevels['UserBlockingPriority'] = |
| 39 | typeof nativeRuntimeScheduler !== 'undefined' |
| 40 | ? nativeRuntimeScheduler.unstable_UserBlockingPriority |
| 41 | : Scheduler.unstable_UserBlockingPriority; |
| 42 | |
| 43 | export const unstable_NormalPriority: PriorityLevels['NormalPriority'] = |
| 44 | typeof nativeRuntimeScheduler !== 'undefined' |
| 45 | ? nativeRuntimeScheduler.unstable_NormalPriority |
| 46 | : Scheduler.unstable_NormalPriority; |
| 47 | |
| 48 | export const unstable_IdlePriority: PriorityLevels['IdlePriority'] = |
| 49 | typeof nativeRuntimeScheduler !== 'undefined' |
| 50 | ? nativeRuntimeScheduler.unstable_IdlePriority |
| 51 | : Scheduler.unstable_IdlePriority; |
| 52 | |
| 53 | export const unstable_LowPriority: PriorityLevels['LowPriority'] = |
| 54 | typeof nativeRuntimeScheduler !== 'undefined' |
| 55 | ? nativeRuntimeScheduler.unstable_LowPriority |
| 56 | : Scheduler.unstable_LowPriority; |
| 57 | |
| 58 | export const unstable_ImmediatePriority: PriorityLevels['ImmediatePriority'] = |
| 59 | typeof nativeRuntimeScheduler !== 'undefined' |
| 60 | ? nativeRuntimeScheduler.unstable_ImmediatePriority |
| 61 | : Scheduler.unstable_ImmediatePriority; |
| 62 | |
| 63 | export const unstable_scheduleCallback: ( |
| 64 | priorityLevel: PriorityLevel, |
| 65 | callback: Callback, |
| 66 | ) => Task = |
| 67 | typeof nativeRuntimeScheduler !== 'undefined' |
| 68 | ? nativeRuntimeScheduler.unstable_scheduleCallback |
| 69 | : Scheduler.unstable_scheduleCallback; |
| 70 | |
| 71 | export const unstable_cancelCallback: (task: Task) => void = |
| 72 | typeof nativeRuntimeScheduler !== 'undefined' |
| 73 | ? nativeRuntimeScheduler.unstable_cancelCallback |
| 74 | : Scheduler.unstable_cancelCallback; |
| 75 | |
| 76 | export const unstable_getCurrentPriorityLevel: () => PriorityLevel = |
| 77 | typeof nativeRuntimeScheduler !== 'undefined' |
| 78 | ? nativeRuntimeScheduler.unstable_getCurrentPriorityLevel |
| 79 | : Scheduler.unstable_getCurrentPriorityLevel; |
| 80 | |
| 81 | export const unstable_shouldYield: () => boolean = |
| 82 | typeof nativeRuntimeScheduler !== 'undefined' |
| 83 | ? nativeRuntimeScheduler.unstable_shouldYield |
| 84 | : Scheduler.unstable_shouldYield; |
| 85 | |
| 86 | export const unstable_requestPaint: () => void = |
| 87 | typeof nativeRuntimeScheduler !== 'undefined' |
| 88 | ? nativeRuntimeScheduler.unstable_requestPaint |
| 89 | : Scheduler.unstable_requestPaint; |
| 90 | |
| 91 | export const unstable_now: () => number | DOMHighResTimeStamp = |
| 92 | typeof nativeRuntimeScheduler !== 'undefined' |
| 93 | ? nativeRuntimeScheduler.unstable_now |
| 94 | : Scheduler.unstable_now; |
| 95 | |
| 96 | // These were never implemented on the native scheduler because React never calls them. |
| 97 | // For consistency, let's disable them altogether and make them throw. |
| 98 | export const unstable_next: any = throwNotImplemented; |
| 99 | export const unstable_runWithPriority: any = throwNotImplemented; |
| 100 | export const unstable_wrapCallback: any = throwNotImplemented; |
| 101 | export const unstable_forceFrameRate: any = throwNotImplemented; |
| 102 | export const unstable_Profiling: any = null; |
| 103 | |
| 104 | function throwNotImplemented() { |
| 105 | throw Error('Not implemented.'); |
| 106 | } |
| 107 | |
| 108 | // Flow magic to verify the exports of this file match the original version. |
| 109 | export type {Callback, Task}; |
| 110 | null as any as SchedulerExportsType as SchedulerNativeExportsType as SchedulerExportsType; |