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type Target,
isReadonly,
isShallow,
toRaw,
toReactive,
toReadonly,
} from './reactive'
import { ITERATE_KEY, MAP_KEY_ITERATE_KEY, track, trigger } from './dep'
import { ReactiveFlags, TrackOpTypes, TriggerOpTypes } from './constants'
import { capitalize, hasChanged, hasOwn, isMap, toRawType } from '@vue/shared'
import { warn } from './warning'
type CollectionTypes = IterableCollections | WeakCollections
type IterableCollections = (Map<any, any> | Set<any>) & Target
type WeakCollections = (WeakMap<any, any> | WeakSet<any>) & Target
type MapTypes = (Map<any, any> | WeakMap<any, any>) & Target
type SetTypes = (Set<any> | WeakSet<any>) & Target
const toShallow = <T extends unknown>(value: T): T => value
const getProto = <T extends CollectionTypes>(v: T): any =>
Reflect.getPrototypeOf(v)
function get(
target: MapTypes,
key: unknown,
isReadonly = false,
isShallow = false,
) {
// #1772: readonly(reactive(Map)) should return readonly + reactive version
// of the value
target = target[ReactiveFlags.RAW]
const rawTarget = toRaw(target)
const rawKey = toRaw(key)
if (!isReadonly) {
if (hasChanged(key, rawKey)) {
track(rawTarget, TrackOpTypes.GET, key)
}
track(rawTarget, TrackOpTypes.GET, rawKey)
}
const { has } = getProto(rawTarget)
const wrap = isShallow ? toShallow : isReadonly ? toReadonly : toReactive
if (has.call(rawTarget, key)) {
return wrap(target.get(key))
} else if (has.call(rawTarget, rawKey)) {
return wrap(target.get(rawKey))
} else if (target !== rawTarget) {
// #3602 readonly(reactive(Map))
// ensure that the nested reactive `Map` can do tracking for itself
target.get(key)
}
}
function has(this: CollectionTypes, key: unknown, isReadonly = false): boolean {
const target = this[ReactiveFlags.RAW]
const rawTarget = toRaw(target)
const rawKey = toRaw(key)
if (!isReadonly) {
if (hasChanged(key, rawKey)) {
track(rawTarget, TrackOpTypes.HAS, key)
}
track(rawTarget, TrackOpTypes.HAS, rawKey)
}
return key === rawKey
? target.has(key)
: target.has(key) || target.has(rawKey)
}
function size(target: IterableCollections, isReadonly = false) {
target = target[ReactiveFlags.RAW]
!isReadonly && track(toRaw(target), TrackOpTypes.ITERATE, ITERATE_KEY)
return Reflect.get(target, 'size', target)
}
function add(this: SetTypes, value: unknown, _isShallow = false) {
if (!_isShallow && !isShallow(value) && !isReadonly(value)) {
value = toRaw(value)
}
const target = toRaw(this)
const proto = getProto(target)
const hadKey = proto.has.call(target, value)
if (!hadKey) {
target.add(value)
trigger(target, TriggerOpTypes.ADD, value, value)
}
return this
}
function set(this: MapTypes, key: unknown, value: unknown, _isShallow = false) {
if (!_isShallow && !isShallow(value) && !isReadonly(value)) {
value = toRaw(value)
}
const target = toRaw(this)
const { has, get } = getProto(target)
let hadKey = has.call(target, key)
if (!hadKey) {
key = toRaw(key)
hadKey = has.call(target, key)
} else if (__DEV__) {
checkIdentityKeys(target, has, key)
}
const oldValue = get.call(target, key)
target.set(key, value)
if (!hadKey) {
trigger(target, TriggerOpTypes.ADD, key, value)
} else if (hasChanged(value, oldValue)) {
trigger(target, TriggerOpTypes.SET, key, value, oldValue)
}
return this
}
function deleteEntry(this: CollectionTypes, key: unknown) {
const target = toRaw(this)
const { has, get } = getProto(target)
let hadKey = has.call(target, key)
if (!hadKey) {
key = toRaw(key)
hadKey = has.call(target, key)
} else if (__DEV__) {
checkIdentityKeys(target, has, key)
}
const oldValue = get ? get.call(target, key) : undefined
// forward the operation before queueing reactions
const result = target.delete(key)
if (hadKey) {
trigger(target, TriggerOpTypes.DELETE, key, undefined, oldValue)
}
return result
}
function clear(this: IterableCollections) {
const target = toRaw(this)
const hadItems = target.size !== 0
const oldTarget = __DEV__
? isMap(target)
? new Map(target)
: new Set(target)
: undefined
// forward the operation before queueing reactions
const result = target.clear()
if (hadItems) {
trigger(target, TriggerOpTypes.CLEAR, undefined, undefined, oldTarget)
}
return result
}
function createForEach(isReadonly: boolean, isShallow: boolean) {
return function forEach(
this: IterableCollections,
callback: Function,
thisArg?: unknown,
) {
const observed = this
const target = observed[ReactiveFlags.RAW]
const rawTarget = toRaw(target)
const wrap = isShallow ? toShallow : isReadonly ? toReadonly : toReactive
!isReadonly && track(rawTarget, TrackOpTypes.ITERATE, ITERATE_KEY)
return target.forEach((value: unknown, key: unknown) => {
// important: make sure the callback is
// 1. invoked with the reactive map as `this` and 3rd arg
// 2. the value received should be a corresponding reactive/readonly.
return callback.call(thisArg, wrap(value), wrap(key), observed)
})
}
}
function createIterableMethod(
method: string | symbol,
isReadonly: boolean,
isShallow: boolean,
) {
return function (
this: IterableCollections,
...args: unknown[]
): Iterable<unknown> & Iterator<unknown> {
const target = this[ReactiveFlags.RAW]
const rawTarget = toRaw(target)
const targetIsMap = isMap(rawTarget)
const isPair =
method === 'entries' || (method === Symbol.iterator && targetIsMap)
const isKeyOnly = method === 'keys' && targetIsMap
const innerIterator = target[method](...args)
const wrap = isShallow ? toShallow : isReadonly ? toReadonly : toReactive
!isReadonly &&
track(
rawTarget,
TrackOpTypes.ITERATE,
isKeyOnly ? MAP_KEY_ITERATE_KEY : ITERATE_KEY,
)
// return a wrapped iterator which returns observed versions of the
// values emitted from the real iterator
return {
// iterator protocol
next() {
const { value, done } = innerIterator.next()
return done
? { value, done }
: {
value: isPair ? [wrap(value[0]), wrap(value[1])] : wrap(value),
done,
}
},
// iterable protocol
[Symbol.iterator]() {
return this
},
}
}
}
function createReadonlyMethod(type: TriggerOpTypes): Function {
return function (this: CollectionTypes, ...args: unknown[]) {
if (__DEV__) {
const key = args[0] ? `on key "${args[0]}" ` : ``
warn(
`${capitalize(type)} operation ${key}failed: target is readonly.`,
toRaw(this),
)
}
return type === TriggerOpTypes.DELETE
? false
: type === TriggerOpTypes.CLEAR
? undefined
: this
}
}
type Instrumentations = Record<string | symbol, Function | number>
function createInstrumentations() {
const mutableInstrumentations: Instrumentations = {
get(this: MapTypes, key: unknown) {
return get(this, key)
},
get size() {
return size(this as unknown as IterableCollections)
},
has,
add,
set,
delete: deleteEntry,
clear,
forEach: createForEach(false, false),
}
const shallowInstrumentations: Instrumentations = {
get(this: MapTypes, key: unknown) {
return get(this, key, false, true)
},
get size() {
return size(this as unknown as IterableCollections)
},
has,
add(this: SetTypes, value: unknown) {
return add.call(this, value, true)
},
set(this: MapTypes, key: unknown, value: unknown) {
return set.call(this, key, value, true)
},
delete: deleteEntry,
clear,
forEach: createForEach(false, true),
}
const readonlyInstrumentations: Instrumentations = {
get(this: MapTypes, key: unknown) {
return get(this, key, true)
},
get size() {
return size(this as unknown as IterableCollections, true)
},
has(this: MapTypes, key: unknown) {
return has.call(this, key, true)
},
add: createReadonlyMethod(TriggerOpTypes.ADD),
set: createReadonlyMethod(TriggerOpTypes.SET),
delete: createReadonlyMethod(TriggerOpTypes.DELETE),
clear: createReadonlyMethod(TriggerOpTypes.CLEAR),
forEach: createForEach(true, false),
}
const shallowReadonlyInstrumentations: Instrumentations = {
get(this: MapTypes, key: unknown) {
return get(this, key, true, true)
},
get size() {
return size(this as unknown as IterableCollections, true)
},
has(this: MapTypes, key: unknown) {
return has.call(this, key, true)
},
add: createReadonlyMethod(TriggerOpTypes.ADD),
set: createReadonlyMethod(TriggerOpTypes.SET),
delete: createReadonlyMethod(TriggerOpTypes.DELETE),
clear: createReadonlyMethod(TriggerOpTypes.CLEAR),
forEach: createForEach(true, true),
}
const iteratorMethods = [
'keys',
'values',
'entries',
Symbol.iterator,
] as const
iteratorMethods.forEach(method => {
mutableInstrumentations[method] = createIterableMethod(method, false, false)
readonlyInstrumentations[method] = createIterableMethod(method, true, false)
shallowInstrumentations[method] = createIterableMethod(method, false, true)
shallowReadonlyInstrumentations[method] = createIterableMethod(
method,
true,
true,
)
})
return [
mutableInstrumentations,
readonlyInstrumentations,
shallowInstrumentations,
shallowReadonlyInstrumentations,
]
}
const [
mutableInstrumentations,
readonlyInstrumentations,
shallowInstrumentations,
shallowReadonlyInstrumentations,
] = /* @__PURE__*/ createInstrumentations()
function createInstrumentationGetter(isReadonly: boolean, shallow: boolean) {
const instrumentations = shallow
? isReadonly
? shallowReadonlyInstrumentations
: shallowInstrumentations
: isReadonly
? readonlyInstrumentations
: mutableInstrumentations
return (
target: CollectionTypes,
key: string | symbol,
receiver: CollectionTypes,
) => {
if (key === ReactiveFlags.IS_REACTIVE) {
return !isReadonly
} else if (key === ReactiveFlags.IS_READONLY) {
return isReadonly
} else if (key === ReactiveFlags.RAW) {
return target
}
return Reflect.get(
hasOwn(instrumentations, key) && key in target
? instrumentations
: target,
key,
receiver,
)
}
}
export const mutableCollectionHandlers: ProxyHandler<CollectionTypes> = {
get: /*@__PURE__*/ createInstrumentationGetter(false, false),
}
export const shallowCollectionHandlers: ProxyHandler<CollectionTypes> = {
get: /*@__PURE__*/ createInstrumentationGetter(false, true),
}
export const readonlyCollectionHandlers: ProxyHandler<CollectionTypes> = {
get: /*@__PURE__*/ createInstrumentationGetter(true, false),
}
export const shallowReadonlyCollectionHandlers: ProxyHandler<CollectionTypes> =
{
get: /*@__PURE__*/ createInstrumentationGetter(true, true),
}
function checkIdentityKeys(
target: CollectionTypes,
has: (key: unknown) => boolean,
key: unknown,
) {
const rawKey = toRaw(key)
if (rawKey !== key && has.call(target, rawKey)) {
const type = toRawType(target)
warn(
`Reactive ${type} contains both the raw and reactive ` +
`versions of the same object${type === `Map` ? ` as keys` : ``}, ` +
`which can lead to inconsistencies. ` +
`Avoid differentiating between the raw and reactive versions ` +
`of an object and only use the reactive version if possible.`,
)
}
}
|