387 lines
10 KiB
TypeScript
387 lines
10 KiB
TypeScript
import { readonly, toRaw, lock, unlock } from '@vue/reactivity'
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import {
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EMPTY_OBJ,
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camelize,
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hyphenate,
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capitalize,
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isString,
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isFunction,
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isArray,
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isObject,
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isReservedProp
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} from '@vue/shared'
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import { warn } from './warning'
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import { Data, ComponentInstance } from './component'
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import { PatchFlags } from './patchFlags'
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export type ComponentPropsOptions<P = Data> = {
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[K in keyof P]: Prop<P[K]> | null
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}
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type Prop<T> = PropOptions<T> | PropType<T>
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interface PropOptions<T = any> {
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type?: PropType<T> | true | null
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required?: boolean
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default?: T | null | undefined | (() => T | null | undefined)
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validator?(value: any): boolean
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}
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export type PropType<T> = PropConstructor<T> | PropConstructor<T>[]
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type PropConstructor<T> = { new (...args: any[]): T & object } | { (): T }
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type RequiredKeys<T, MakeDefautRequired> = {
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[K in keyof T]: T[K] extends
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| { required: true }
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| (MakeDefautRequired extends true ? { default: any } : never)
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? K
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: never
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}[keyof T]
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type OptionalKeys<T, MakeDefautRequired> = Exclude<
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keyof T,
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RequiredKeys<T, MakeDefautRequired>
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>
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type InferPropType<T> = T extends null
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? any // null & true would fail to infer
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: T extends { type: null | true }
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? any // somehow `ObjectContructor` when inferred from { (): T } becomes `any`
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: T extends ObjectConstructor | { type: ObjectConstructor }
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? { [key: string]: any }
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: T extends Prop<infer V> ? V : T
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export type ExtractPropTypes<
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O,
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MakeDefautRequired extends boolean = true
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> = O extends object
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? {
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readonly [K in RequiredKeys<O, MakeDefautRequired>]: InferPropType<O[K]>
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} &
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{
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readonly [K in OptionalKeys<O, MakeDefautRequired>]?: InferPropType<
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O[K]
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>
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}
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: { [K in string]: any }
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const enum BooleanFlags {
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shouldCast = '1',
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shouldCastTrue = '2'
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}
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type NormalizedProp =
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| null
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| (PropOptions & {
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[BooleanFlags.shouldCast]?: boolean
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[BooleanFlags.shouldCastTrue]?: boolean
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})
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type NormalizedPropsOptions = Record<string, NormalizedProp>
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// resolve raw VNode data.
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// - filter out reserved keys (key, ref, slots)
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// - extract class and style into $attrs (to be merged onto child
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// component root)
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// - for the rest:
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// - if has declared props: put declared ones in `props`, the rest in `attrs`
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// - else: everything goes in `props`.
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export function resolveProps(
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instance: ComponentInstance,
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rawProps: any,
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_options: ComponentPropsOptions | void
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) {
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const hasDeclaredProps = _options != null
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const options = normalizePropsOptions(_options) as NormalizedPropsOptions
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if (!rawProps && !hasDeclaredProps) {
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return
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}
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const props: any = {}
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let attrs: any = void 0
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// update the instance propsProxy (passed to setup()) to trigger potential
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// changes
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const propsProxy = instance.propsProxy
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const setProp = propsProxy
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? (key: string, val: any) => {
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props[key] = val
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propsProxy[key] = val
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}
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: (key: string, val: any) => {
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props[key] = val
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}
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// allow mutation of propsProxy (which is readonly by default)
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unlock()
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if (rawProps != null) {
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for (const key in rawProps) {
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// key, ref are reserved
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if (isReservedProp(key)) continue
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// any non-declared data are put into a separate `attrs` object
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// for spreading
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if (hasDeclaredProps && !options.hasOwnProperty(key)) {
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;(attrs || (attrs = {}))[key] = rawProps[key]
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} else {
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setProp(key, rawProps[key])
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}
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}
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}
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// set default values, cast booleans & run validators
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if (hasDeclaredProps) {
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for (const key in options) {
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let opt = options[key]
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if (opt == null) continue
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const isAbsent = !props.hasOwnProperty(key)
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const hasDefault = opt.hasOwnProperty('default')
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const currentValue = props[key]
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// default values
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if (hasDefault && currentValue === undefined) {
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const defaultValue = opt.default
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setProp(key, isFunction(defaultValue) ? defaultValue() : defaultValue)
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}
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// boolean casting
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if (opt[BooleanFlags.shouldCast]) {
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if (isAbsent && !hasDefault) {
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setProp(key, false)
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} else if (
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opt[BooleanFlags.shouldCastTrue] &&
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(currentValue === '' || currentValue === hyphenate(key))
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) {
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setProp(key, true)
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}
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}
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// runtime validation
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if (__DEV__ && rawProps) {
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validateProp(key, toRaw(rawProps[key]), opt, isAbsent)
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}
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}
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} else {
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// if component has no declared props, $attrs === $props
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attrs = props
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}
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// in case of dynamic props, check if we need to delete keys from
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// the props proxy
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const { patchFlag } = instance.vnode
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if (
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propsProxy !== null &&
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(patchFlag === 0 || patchFlag & PatchFlags.FULL_PROPS)
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) {
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const rawInitialProps = toRaw(propsProxy)
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for (const key in rawInitialProps) {
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if (!props.hasOwnProperty(key)) {
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delete propsProxy[key]
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}
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}
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}
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// lock readonly
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lock()
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instance.props = __DEV__ ? readonly(props) : props
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instance.attrs = options
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? __DEV__ && attrs != null
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? readonly(attrs)
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: attrs
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: instance.props
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}
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const normalizationMap = new WeakMap()
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function normalizePropsOptions(
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raw: ComponentPropsOptions | void
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): NormalizedPropsOptions | void {
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if (!raw) {
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return
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}
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if (normalizationMap.has(raw)) {
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return normalizationMap.get(raw)
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}
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const normalized: NormalizedPropsOptions = {}
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normalizationMap.set(raw, normalized)
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if (isArray(raw)) {
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for (let i = 0; i < raw.length; i++) {
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if (__DEV__ && !isString(raw[i])) {
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warn(`props must be strings when using array syntax.`, raw[i])
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}
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const normalizedKey = camelize(raw[i])
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if (normalizedKey[0] !== '$') {
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normalized[normalizedKey] = EMPTY_OBJ
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} else if (__DEV__) {
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warn(`Invalid prop name: "${normalizedKey}" is a reserved property.`)
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}
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}
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} else {
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if (__DEV__ && !isObject(raw)) {
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warn(`invalid props options`, raw)
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}
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for (const key in raw) {
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const normalizedKey = camelize(key)
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if (normalizedKey[0] !== '$') {
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const opt = raw[key]
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const prop: NormalizedProp = (normalized[normalizedKey] =
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isArray(opt) || isFunction(opt) ? { type: opt } : opt)
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if (prop != null) {
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const booleanIndex = getTypeIndex(Boolean, prop.type)
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const stringIndex = getTypeIndex(String, prop.type)
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prop[BooleanFlags.shouldCast] = booleanIndex > -1
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prop[BooleanFlags.shouldCastTrue] = booleanIndex < stringIndex
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}
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} else if (__DEV__) {
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warn(`Invalid prop name: "${normalizedKey}" is a reserved property.`)
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}
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}
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}
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return normalized
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}
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// use function string name to check type constructors
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// so that it works across vms / iframes.
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function getType(ctor: Prop<any>): string {
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const match = ctor && ctor.toString().match(/^\s*function (\w+)/)
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return match ? match[1] : ''
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}
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function isSameType(a: Prop<any>, b: Prop<any>): boolean {
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return getType(a) === getType(b)
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}
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function getTypeIndex(
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type: Prop<any>,
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expectedTypes: PropType<any> | void | null | true
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): number {
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if (isArray(expectedTypes)) {
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for (let i = 0, len = expectedTypes.length; i < len; i++) {
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if (isSameType(expectedTypes[i], type)) {
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return i
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}
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}
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} else if (isObject(expectedTypes)) {
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return isSameType(expectedTypes, type) ? 0 : -1
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}
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return -1
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}
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type AssertionResult = {
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valid: boolean
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expectedType: string
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}
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function validateProp(
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name: string,
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value: any,
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prop: PropOptions<any>,
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isAbsent: boolean
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) {
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const { type, required, validator } = prop
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// required!
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if (required && isAbsent) {
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warn('Missing required prop: "' + name + '"')
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return
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}
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// missing but optional
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if (value == null && !prop.required) {
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return
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}
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// type check
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if (type != null && type !== true) {
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let isValid = false
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const types = isArray(type) ? type : [type]
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const expectedTypes = []
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// value is valid as long as one of the specified types match
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for (let i = 0; i < types.length && !isValid; i++) {
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const { valid, expectedType } = assertType(value, types[i])
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expectedTypes.push(expectedType || '')
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isValid = valid
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}
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if (!isValid) {
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warn(getInvalidTypeMessage(name, value, expectedTypes))
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return
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}
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}
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// custom validator
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if (validator && !validator(value)) {
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warn('Invalid prop: custom validator check failed for prop "' + name + '".')
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}
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}
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const simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/
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function assertType(value: any, type: PropConstructor<any>): AssertionResult {
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let valid
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const expectedType = getType(type)
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if (simpleCheckRE.test(expectedType)) {
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const t = typeof value
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valid = t === expectedType.toLowerCase()
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// for primitive wrapper objects
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if (!valid && t === 'object') {
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valid = value instanceof type
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}
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} else if (expectedType === 'Object') {
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valid = toRawType(value) === 'Object'
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} else if (expectedType === 'Array') {
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valid = isArray(value)
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} else {
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valid = value instanceof type
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}
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return {
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valid,
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expectedType
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}
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}
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function getInvalidTypeMessage(
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name: string,
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value: any,
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expectedTypes: string[]
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): string {
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let message =
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`Invalid prop: type check failed for prop "${name}".` +
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` Expected ${expectedTypes.map(capitalize).join(', ')}`
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const expectedType = expectedTypes[0]
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const receivedType = toRawType(value)
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const expectedValue = styleValue(value, expectedType)
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const receivedValue = styleValue(value, receivedType)
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// check if we need to specify expected value
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if (
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expectedTypes.length === 1 &&
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isExplicable(expectedType) &&
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!isBoolean(expectedType, receivedType)
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) {
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message += ` with value ${expectedValue}`
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}
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message += `, got ${receivedType} `
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// check if we need to specify received value
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if (isExplicable(receivedType)) {
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message += `with value ${receivedValue}.`
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}
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return message
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}
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function styleValue(value: any, type: string): string {
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if (type === 'String') {
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return `"${value}"`
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} else if (type === 'Number') {
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return `${Number(value)}`
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} else {
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return `${value}`
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}
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}
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function toRawType(value: any): string {
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return Object.prototype.toString.call(value).slice(8, -1)
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}
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function isExplicable(type: string): boolean {
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const explicitTypes = ['string', 'number', 'boolean']
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return explicitTypes.some(elem => type.toLowerCase() === elem)
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}
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function isBoolean(...args: string[]): boolean {
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return args.some(elem => elem.toLowerCase() === 'boolean')
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}
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