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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 | 99x 99x 1648x 1648x 1648x 1648x 2x 2x 20x 19x 19x 19x 19x 19x 1x 1x 2665x 2647x 215x 215x 229x 215x 4x 215x 1x 1x 215x 1x 1x 215x 99x 1x 99x 1605x 1314x 99x 2x 99x 5x 4x 1x 1x | import { ReactiveEffect } from './effect'
import { warn } from './warning'
let activeEffectScope: EffectScope | undefined
export class EffectScope {
/**
* @internal
*/
active = true
/**
* @internal
*/
effects: ReactiveEffect[] = []
/**
* @internal
*/
cleanups: (() => void)[] = []
/**
* only assigned by undetached scope
* @internal
*/
parent: EffectScope | undefined
/**
* record undetached scopes
* @internal
*/
scopes: EffectScope[] | undefined
/**
* track a child scope's index in its parent's scopes array for optimized
* removal
* @internal
*/
private index: number | undefined
constructor(detached = false) {
if (!detached && activeEffectScope) {
this.parent = activeEffectScope
this.index =
(activeEffectScope.scopes || (activeEffectScope.scopes = [])).push(
this
) - 1
}
}
run<T>(fn: () => T): T | undefined {
if (this.active) {
const currentEffectScope = activeEffectScope
try {
activeEffectScope = this
return fn()
} finally {
activeEffectScope = currentEffectScope
}
} else if (__DEV__) {
warn(`cannot run an inactive effect scope.`)
}
}
/**
* This should only be called on non-detached scopes
* @internal
*/
on() {
activeEffectScope = this
}
/**
* This should only be called on non-detached scopes
* @internal
*/
off() {
activeEffectScope = this.parent
}
stop(fromParent?: boolean) {
if (this.active) {
let i, l
for (i = 0, l = this.effects.length; i < l; i++) {
this.effects[i].stop()
}
for (i = 0, l = this.cleanups.length; i < l; i++) {
this.cleanups[i]()
}
if (this.scopes) {
for (i = 0, l = this.scopes.length; i < l; i++) {
this.scopes[i].stop(true)
}
}
// nested scope, dereference from parent to avoid memory leaks
if (this.parent && !fromParent) {
// optimized O(1) removal
const last = this.parent.scopes!.pop()
Iif (last && last !== this) {
this.parent.scopes![this.index!] = last
last.index = this.index!
}
}
this.active = false
}
}
}
export function effectScope(detached?: boolean) {
return new EffectScope(detached)
}
export function recordEffectScope(
effect: ReactiveEffect,
scope: EffectScope | undefined = activeEffectScope
) {
if (scope && scope.active) {
scope.effects.push(effect)
}
}
export function getCurrentScope() {
return activeEffectScope
}
export function onScopeDispose(fn: () => void) {
if (activeEffectScope) {
activeEffectScope.cleanups.push(fn)
} else if (__DEV__) {
warn(
`onScopeDispose() is called when there is no active effect scope` +
` to be associated with.`
)
}
}
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