| 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 |
| 8 | */ |
| 9 | |
| 10 | import type {ReactComponentInfo, ReactDebugInfo} from 'shared/ReactTypes'; |
| 11 | import type {Fiber} from 'react-reconciler/src/ReactInternalTypes'; |
| 12 | import type {WorkTagMap} from '../../types'; |
| 13 | import type {Rect} from '../../types'; |
| 14 | |
| 15 | // $FlowFixMe[method-unbinding] |
| 16 | const toString = Object.prototype.toString; |
| 17 | |
| 18 | export function isError(object: mixed): boolean { |
| 19 | return toString.call(object) === '[object Error]'; |
| 20 | } |
| 21 | |
| 22 | export function getFiberFlags(fiber: Fiber): number { |
| 23 | // The name of this field changed from "effectTag" to "flags" |
| 24 | return fiber.flags !== undefined ? fiber.flags : (fiber as any).effectTag; |
| 25 | } |
| 26 | |
| 27 | export function rootSupportsProfiling(root: any): boolean { |
| 28 | if (root.memoizedInteractions != null) { |
| 29 | // v16 builds include this field for the scheduler/tracing API. |
| 30 | return true; |
| 31 | } else if ( |
| 32 | root.current != null && |
| 33 | root.current.hasOwnProperty('treeBaseDuration') |
| 34 | ) { |
| 35 | // The scheduler/tracing API was removed in v17 though |
| 36 | // so we need to check a non-root Fiber. |
| 37 | return true; |
| 38 | } else { |
| 39 | return false; |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | export function isErrorBoundary(workTagMap: WorkTagMap, fiber: Fiber): boolean { |
| 44 | const {tag, type} = fiber; |
| 45 | |
| 46 | switch (tag) { |
| 47 | case workTagMap.ClassComponent: |
| 48 | case workTagMap.IncompleteClassComponent: |
| 49 | const instance = fiber.stateNode; |
| 50 | return ( |
| 51 | typeof type.getDerivedStateFromError === 'function' || |
| 52 | (instance !== null && typeof instance.componentDidCatch === 'function') |
| 53 | ); |
| 54 | default: |
| 55 | return false; |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | export function getSecondaryEnvironmentName( |
| 60 | debugInfo: ?ReactDebugInfo, |
| 61 | index: number, |
| 62 | ): null | string { |
| 63 | if (debugInfo != null) { |
| 64 | const componentInfo: ReactComponentInfo = debugInfo[index] as any; |
| 65 | for (let i = index + 1; i < debugInfo.length; i++) { |
| 66 | const debugEntry = debugInfo[i]; |
| 67 | if (typeof debugEntry.env === 'string') { |
| 68 | // If the next environment is different then this component was the boundary |
| 69 | // and it changed before entering the next component. So we assign this |
| 70 | // component a secondary environment. |
| 71 | return componentInfo.env !== debugEntry.env ? debugEntry.env : null; |
| 72 | } |
| 73 | } |
| 74 | } |
| 75 | return null; |
| 76 | } |
| 77 | |
| 78 | export function areEqualRects( |
| 79 | a: null | Array<Rect>, |
| 80 | b: null | Array<Rect>, |
| 81 | ): boolean { |
| 82 | if (a === null) { |
| 83 | return b === null; |
| 84 | } |
| 85 | if (b === null) { |
| 86 | return false; |
| 87 | } |
| 88 | if (a.length !== b.length) { |
| 89 | return false; |
| 90 | } |
| 91 | for (let i = 0; i < a.length; i++) { |
| 92 | const aRect = a[i]; |
| 93 | const bRect = b[i]; |
| 94 | if ( |
| 95 | aRect.x !== bRect.x || |
| 96 | aRect.y !== bRect.y || |
| 97 | aRect.width !== bRect.width || |
| 98 | aRect.height !== bRect.height |
| 99 | ) { |
| 100 | return false; |
| 101 | } |
| 102 | } |
| 103 | return true; |
| 104 | } |