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528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2248x 1921x 1921x 2248x 2x 5x 5x 2x 5x 5x 5x 5x 5x 5x 5x 5x 2x 1379x 1379x 123x 1379x 85x 85x 1319x 1239x 1239x 1379x 2x 3662x 6x 6x 3656x 3656x 3656x 3656x 3656x 3656x 3656x 3656x 3656x 3656x 3656x 3656x 3656x 3656x 3656x 3656x 3662x 2x 387x 387x 448x 448x 387x 387x 387x 387x 387x 387x 2x 1244x 7x 1244x 925x 1237x 312x 312x 1244x 2x 1024x 1007x 1007x 1024x 2x 229x 229x 2x 2x 2x 2x 1313x 1313x 1313x 1313x 2x 2496x 2496x 2x 2496x 891x 891x 1605x 2474x 1175x 1175x 1175x 1313x 1313x 1313x 1175x 1175x 1175x 1304x 1239x 1239x 1239x 1239x 1304x 1304x 1304x 1304x 1175x 2496x 2496x 3951x 3951x 2966x 2966x 2966x 2966x 3951x 3951x 3951x 3951x 3951x 3951x 6034x 6034x 365x 365x 365x 6034x 5669x 5669x 6034x 6034x 6034x 6034x 3951x 3951x 3951x 1405x 1405x 2066x 2066x 803x 74x 72x 2066x 1319x 1319x 2066x 730x 84x 84x 2x 421x 421x 203x 421x 70x 70x 351x 421x 49x 49x 302x 302x 302x 302x 302x 159x 154x 152x 421x 7x 7x 7x 295x 295x 295x 295x 295x 295x 295x 421x 273x 273x 273x 421x 2x 2x 421x 295x 295x 295x 295x 295x 421x 821x 821x 821x 47x 47x 47x 821x 48x 48x 48x 821x 765x 765x 821x 764x 764x 821x 8x 8x 8x 8x 8x 821x 599x 599x 821x 365x 365x 365x 72x 72x 72x 365x 334x 334x 334x 365x 2x 271x 271x 271x 271x 1x 1x 271x 271x 15x 15x 271x 271x 271x 271x 271x 271x 271x 2x 7x 7x 2x 2x 2x 4994x 4994x 4994x 2x 2x 4989x 4989x 4989x 2x 5x 3x 5x 1x 1x 1x 1x 5x 4043x 4043x 4043x 4043x 3x 3x 3x 3x 3x 3x 3x 3x 4043x | import { extend, hasChanged } from '@vue/shared' import type { ComputedRefImpl } from './computed' import type { TrackOpTypes, TriggerOpTypes } from './constants' import { type Link, globalVersion } from './dep' import { activeEffectScope } from './effectScope' import { warn } from './warning' export type EffectScheduler = (...args: any[]) => any export type DebuggerEvent = { effect: Subscriber } & DebuggerEventExtraInfo export type DebuggerEventExtraInfo = { target: object type: TrackOpTypes | TriggerOpTypes key: any newValue?: any oldValue?: any oldTarget?: Map<any, any> | Set<any> } export interface DebuggerOptions { onTrack?: (event: DebuggerEvent) => void onTrigger?: (event: DebuggerEvent) => void } export interface ReactiveEffectOptions extends DebuggerOptions { scheduler?: EffectScheduler allowRecurse?: boolean onStop?: () => void } export interface ReactiveEffectRunner<T = any> { (): T effect: ReactiveEffect } export let activeSub: Subscriber | undefined export enum EffectFlags { /** * ReactiveEffect only */ ACTIVE = 1 << 0, RUNNING = 1 << 1, TRACKING = 1 << 2, NOTIFIED = 1 << 3, DIRTY = 1 << 4, ALLOW_RECURSE = 1 << 5, PAUSED = 1 << 6, } /** * Subscriber is a type that tracks (or subscribes to) a list of deps. */ export interface Subscriber extends DebuggerOptions { /** * Head of the doubly linked list representing the deps * @internal */ deps?: Link /** * Tail of the same list * @internal */ depsTail?: Link /** * @internal */ flags: EffectFlags /** * @internal */ next?: Subscriber /** * returning `true` indicates it's a computed that needs to call notify * on its dep too * @internal */ notify(): true | void } const pausedQueueEffects = new WeakSet<ReactiveEffect>() export class ReactiveEffect<T = any> implements Subscriber, ReactiveEffectOptions { /** * @internal */ deps?: Link = undefined /** * @internal */ depsTail?: Link = undefined /** * @internal */ flags: EffectFlags = EffectFlags.ACTIVE | EffectFlags.TRACKING /** * @internal */ next?: Subscriber = undefined /** * @internal */ cleanup?: () => void = undefined scheduler?: EffectScheduler = undefined onStop?: () => void onTrack?: (event: DebuggerEvent) => void onTrigger?: (event: DebuggerEvent) => void constructor(public fn: () => T) { if (activeEffectScope && activeEffectScope.active) { activeEffectScope.effects.push(this) } } pause(): void { this.flags |= EffectFlags.PAUSED } resume(): void { if (this.flags & EffectFlags.PAUSED) { this.flags &= ~EffectFlags.PAUSED if (pausedQueueEffects.has(this)) { pausedQueueEffects.delete(this) this.trigger() } } } /** * @internal */ notify(): void { if ( this.flags & EffectFlags.RUNNING && !(this.flags & EffectFlags.ALLOW_RECURSE) ) { return } if (!(this.flags & EffectFlags.NOTIFIED)) { batch(this) } } run(): T { // TODO cleanupEffect if (!(this.flags & EffectFlags.ACTIVE)) { // stopped during cleanup return this.fn() } this.flags |= EffectFlags.RUNNING cleanupEffect(this) prepareDeps(this) const prevEffect = activeSub const prevShouldTrack = shouldTrack activeSub = this shouldTrack = true try { return this.fn() } finally { if (__DEV__ && activeSub !== this) { warn( 'Active effect was not restored correctly - ' + 'this is likely a Vue internal bug.', ) } cleanupDeps(this) activeSub = prevEffect shouldTrack = prevShouldTrack this.flags &= ~EffectFlags.RUNNING } } stop(): void { if (this.flags & EffectFlags.ACTIVE) { for (let link = this.deps; link; link = link.nextDep) { removeSub(link) } this.deps = this.depsTail = undefined cleanupEffect(this) this.onStop && this.onStop() this.flags &= ~EffectFlags.ACTIVE } } trigger(): void { if (this.flags & EffectFlags.PAUSED) { pausedQueueEffects.add(this) } else if (this.scheduler) { this.scheduler() } else { this.runIfDirty() } } /** * @internal */ runIfDirty(): void { if (isDirty(this)) { this.run() } } get dirty(): boolean { return isDirty(this) } } /** * For debugging */ // function printDeps(sub: Subscriber) { // let d = sub.deps // let ds = [] // while (d) { // ds.push(d) // d = d.nextDep // } // return ds.map(d => ({ // id: d.id, // prev: d.prevDep?.id, // next: d.nextDep?.id, // })) // } let batchDepth = 0 let batchedSub: Subscriber | undefined export function batch(sub: Subscriber): void { sub.flags |= EffectFlags.NOTIFIED sub.next = batchedSub batchedSub = sub } /** * @internal */ export function startBatch(): void { batchDepth++ } /** * Run batched effects when all batches have ended * @internal */ export function endBatch(): void { if (--batchDepth > 0) { return } let error: unknown while (batchedSub) { let e: Subscriber | undefined = batchedSub let next: Subscriber | undefined while (e) { e.flags &= ~EffectFlags.NOTIFIED e = e.next } e = batchedSub batchedSub = undefined while (e) { if (e.flags & EffectFlags.ACTIVE) { try { // ACTIVE flag is effect-only ;(e as ReactiveEffect).trigger() } catch (err) { if (!error) error = err } } next = e.next e.next = undefined e = next } } if (error) throw error } function prepareDeps(sub: Subscriber) { // Prepare deps for tracking, starting from the head for (let link = sub.deps; link; link = link.nextDep) { // set all previous deps' (if any) version to -1 so that we can track // which ones are unused after the run link.version = -1 // store previous active sub if link was being used in another context link.prevActiveLink = link.dep.activeLink link.dep.activeLink = link } } function cleanupDeps(sub: Subscriber) { // Cleanup unsued deps let head let tail = sub.depsTail let link = tail while (link) { const prev = link.prevDep if (link.version === -1) { if (link === tail) tail = prev // unused - remove it from the dep's subscribing effect list removeSub(link) // also remove it from this effect's dep list removeDep(link) } else { // The new head is the last node seen which wasn't removed // from the doubly-linked list head = link } // restore previous active link if any link.dep.activeLink = link.prevActiveLink link.prevActiveLink = undefined link = prev } // set the new head & tail sub.deps = head sub.depsTail = tail } function isDirty(sub: Subscriber): boolean { for (let link = sub.deps; link; link = link.nextDep) { if ( link.dep.version !== link.version || (link.dep.computed && (refreshComputed(link.dep.computed) || link.dep.version !== link.version)) ) { return true } } // @ts-expect-error only for backwards compatibility where libs manually set // this flag - e.g. Pinia's testing module if (sub._dirty) { return true } return false } /** * Returning false indicates the refresh failed * @internal */ export function refreshComputed(computed: ComputedRefImpl): undefined { if ( computed.flags & EffectFlags.TRACKING && !(computed.flags & EffectFlags.DIRTY) ) { return } computed.flags &= ~EffectFlags.DIRTY // Global version fast path when no reactive changes has happened since // last refresh. if (computed.globalVersion === globalVersion) { return } computed.globalVersion = globalVersion const dep = computed.dep computed.flags |= EffectFlags.RUNNING // In SSR there will be no render effect, so the computed has no subscriber // and therefore tracks no deps, thus we cannot rely on the dirty check. // Instead, computed always re-evaluate and relies on the globalVersion // fast path above for caching. if ( dep.version > 0 && !computed.isSSR && computed.deps && !isDirty(computed) ) { computed.flags &= ~EffectFlags.RUNNING return } const prevSub = activeSub const prevShouldTrack = shouldTrack activeSub = computed shouldTrack = true try { prepareDeps(computed) const value = computed.fn(computed._value) if (dep.version === 0 || hasChanged(value, computed._value)) { computed._value = value dep.version++ } } catch (err) { dep.version++ throw err } finally { activeSub = prevSub shouldTrack = prevShouldTrack cleanupDeps(computed) computed.flags &= ~EffectFlags.RUNNING } } function removeSub(link: Link, soft = false) { const { dep, prevSub, nextSub } = link if (prevSub) { prevSub.nextSub = nextSub link.prevSub = undefined } if (nextSub) { nextSub.prevSub = prevSub link.nextSub = undefined } if (dep.subs === link) { // was previous tail, point new tail to prev dep.subs = prevSub } if (__DEV__ && dep.subsHead === link) { // was previous head, point new head to next dep.subsHead = nextSub } if (!dep.subs && dep.computed) { // if computed, unsubscribe it from all its deps so this computed and its // value can be GCed dep.computed.flags &= ~EffectFlags.TRACKING for (let l = dep.computed.deps; l; l = l.nextDep) { // here we are only "soft" unsubscribing because the computed still keeps // referencing the deps and the dep should not decrease its sub count removeSub(l, true) } } if (!soft && !--dep.sc && dep.map) { // #11979 // property dep no longer has effect subscribers, delete it // this mostly is for the case where an object is kept in memory but only a // subset of its properties is tracked at one time dep.map.delete(dep.key) } } function removeDep(link: Link) { const { prevDep, nextDep } = link if (prevDep) { prevDep.nextDep = nextDep link.prevDep = undefined } if (nextDep) { nextDep.prevDep = prevDep link.nextDep = undefined } } export interface ReactiveEffectRunner<T = any> { (): T effect: ReactiveEffect } export function effect<T = any>( fn: () => T, options?: ReactiveEffectOptions, ): ReactiveEffectRunner<T> { if ((fn as ReactiveEffectRunner).effect instanceof ReactiveEffect) { fn = (fn as ReactiveEffectRunner).effect.fn } const e = new ReactiveEffect(fn) if (options) { extend(e, options) } try { e.run() } catch (err) { e.stop() throw err } const runner = e.run.bind(e) as ReactiveEffectRunner runner.effect = e return runner } /** * Stops the effect associated with the given runner. * * @param runner - Association with the effect to stop tracking. */ export function stop(runner: ReactiveEffectRunner): void { runner.effect.stop() } /** * @internal */ export let shouldTrack = true const trackStack: boolean[] = [] /** * Temporarily pauses tracking. */ export function pauseTracking(): void { trackStack.push(shouldTrack) shouldTrack = false } /** * Re-enables effect tracking (if it was paused). */ export function enableTracking(): void { trackStack.push(shouldTrack) shouldTrack = true } /** * Resets the previous global effect tracking state. */ export function resetTracking(): void { const last = trackStack.pop() shouldTrack = last === undefined ? true : last } /** * Registers a cleanup function for the current active effect. * The cleanup function is called right before the next effect run, or when the * effect is stopped. * * Throws a warning if there is no current active effect. The warning can be * suppressed by passing `true` to the second argument. * * @param fn - the cleanup function to be registered * @param failSilently - if `true`, will not throw warning when called without * an active effect. */ export function onEffectCleanup(fn: () => void, failSilently = false): void { if (activeSub instanceof ReactiveEffect) { activeSub.cleanup = fn } else if (__DEV__ && !failSilently) { warn( `onEffectCleanup() was called when there was no active effect` + ` to associate with.`, ) } } function cleanupEffect(e: ReactiveEffect) { const { cleanup } = e e.cleanup = undefined if (cleanup) { // run cleanup without active effect const prevSub = activeSub activeSub = undefined try { cleanup() } finally { activeSub = prevSub } } } |