| 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 {FragmentInstanceType} from './ReactFiberConfig'; |
| 11 | import type {Fiber} from './ReactInternalTypes'; |
| 12 | |
| 13 | import { |
| 14 | HostRoot, |
| 15 | HostComponent, |
| 16 | HostSingleton, |
| 17 | HostText, |
| 18 | Fragment, |
| 19 | } from './ReactWorkTags'; |
| 20 | import { |
| 21 | supportsSingletons, |
| 22 | commitNewChildToFragmentInstance, |
| 23 | deleteChildFromFragmentInstance, |
| 24 | } from './ReactFiberConfig'; |
| 25 | import {enableFragmentRefsTextNodes} from 'shared/ReactFeatureFlags'; |
| 26 | |
| 27 | export function commitNewChildToFragmentInstances( |
| 28 | fiber: Fiber, |
| 29 | parentFragmentInstances: null | Array<FragmentInstanceType>, |
| 30 | ): void { |
| 31 | if ( |
| 32 | (fiber.tag !== HostComponent && |
| 33 | fiber.tag !== HostSingleton && |
| 34 | !(enableFragmentRefsTextNodes && fiber.tag === HostText)) || |
| 35 | // Only run fragment insertion effects for initial insertions |
| 36 | fiber.alternate !== null || |
| 37 | parentFragmentInstances === null |
| 38 | ) { |
| 39 | return; |
| 40 | } |
| 41 | for (let i = 0; i < parentFragmentInstances.length; i++) { |
| 42 | const fragmentInstance = parentFragmentInstances[i]; |
| 43 | commitNewChildToFragmentInstance(fiber.stateNode, fragmentInstance); |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | export function commitFragmentInstanceInsertionEffects(fiber: Fiber): void { |
| 48 | let parent = fiber.return; |
| 49 | while (parent !== null) { |
| 50 | if (isFragmentInstanceParent(parent)) { |
| 51 | const fragmentInstance: FragmentInstanceType = parent.stateNode; |
| 52 | commitNewChildToFragmentInstance(fiber.stateNode, fragmentInstance); |
| 53 | } |
| 54 | |
| 55 | if (isFragmentInstanceHostBoundary(parent)) { |
| 56 | return; |
| 57 | } |
| 58 | |
| 59 | parent = parent.return; |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | export function commitFragmentInstanceDeletionEffects(fiber: Fiber): void { |
| 64 | let parent = fiber.return; |
| 65 | while (parent !== null) { |
| 66 | if (isFragmentInstanceParent(parent)) { |
| 67 | const fragmentInstance: FragmentInstanceType = parent.stateNode; |
| 68 | deleteChildFromFragmentInstance(fiber.stateNode, fragmentInstance); |
| 69 | } |
| 70 | |
| 71 | if (isFragmentInstanceHostBoundary(parent)) { |
| 72 | return; |
| 73 | } |
| 74 | |
| 75 | parent = parent.return; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | export function getParentFragmentInstances( |
| 80 | fiber: Fiber, |
| 81 | ): null | Array<FragmentInstanceType> { |
| 82 | let parentFragmentInstances = null; |
| 83 | let parent = fiber.return; |
| 84 | while (parent !== null) { |
| 85 | if (isFragmentInstanceParent(parent)) { |
| 86 | const fragmentInstance: FragmentInstanceType = parent.stateNode; |
| 87 | if (parentFragmentInstances === null) { |
| 88 | parentFragmentInstances = [fragmentInstance]; |
| 89 | } else { |
| 90 | parentFragmentInstances.push(fragmentInstance); |
| 91 | } |
| 92 | } |
| 93 | if (isFragmentInstanceHostBoundary(parent)) { |
| 94 | break; |
| 95 | } |
| 96 | parent = parent.return; |
| 97 | } |
| 98 | return parentFragmentInstances; |
| 99 | } |
| 100 | |
| 101 | // HostPortal / HostHoistable are host parents for placement, but not for |
| 102 | // fragment instance ancestry — commit bookkeeping walks past them so it |
| 103 | // matches getFragmentParentInstanceOrContainerFiber. HostSingleton is a |
| 104 | // fragment host boundary (and a collected child) even when it is not a |
| 105 | // placement scope. |
| 106 | function isFragmentInstanceHostBoundary(fiber: Fiber): boolean { |
| 107 | return ( |
| 108 | fiber.tag === HostComponent || |
| 109 | fiber.tag === HostRoot || |
| 110 | // $FlowFixMe[constant-condition] |
| 111 | (supportsSingletons ? fiber.tag === HostSingleton : false) |
| 112 | ); |
| 113 | } |
| 114 | |
| 115 | function isFragmentInstanceParent(fiber: Fiber): boolean { |
| 116 | return fiber && fiber.tag === Fragment && fiber.stateNode !== null; |
| 117 | } |