/* @flow */
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import { warn } from '../util'
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export default {
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name: 'i18n',
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functional: true,
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props: {
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tag: {
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type: [String, Boolean, Object],
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default: 'span'
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},
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path: {
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type: String,
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required: true
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},
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locale: {
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type: String
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},
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places: {
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type: [Array, Object]
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}
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},
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render (h: Function, { data, parent, props, slots }: Object) {
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const { $i18n } = parent
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if (!$i18n) {
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if (process.env.NODE_ENV !== 'production') {
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warn('Cannot find VueI18n instance!')
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}
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return
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}
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const { path, locale, places } = props
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const params = slots()
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const children = $i18n.i(
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path,
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locale,
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onlyHasDefaultPlace(params) || places
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? useLegacyPlaces(params.default, places)
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: params
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)
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const tag = (!!props.tag && props.tag !== true) || props.tag === false ? props.tag : 'span'
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return tag ? h(tag, data, children) : children
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}
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}
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function onlyHasDefaultPlace (params) {
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let prop
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for (prop in params) {
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if (prop !== 'default') { return false }
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}
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return Boolean(prop)
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}
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function useLegacyPlaces (children, places) {
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const params = places ? createParamsFromPlaces(places) : {}
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if (!children) { return params }
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// Filter empty text nodes
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children = children.filter(child => {
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return child.tag || child.text.trim() !== ''
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})
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const everyPlace = children.every(vnodeHasPlaceAttribute)
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if (process.env.NODE_ENV !== 'production' && everyPlace) {
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warn('`place` attribute is deprecated in next major version. Please switch to Vue slots.')
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}
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return children.reduce(
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everyPlace ? assignChildPlace : assignChildIndex,
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params
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)
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}
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function createParamsFromPlaces (places) {
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if (process.env.NODE_ENV !== 'production') {
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warn('`places` prop is deprecated in next major version. Please switch to Vue slots.')
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}
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return Array.isArray(places)
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? places.reduce(assignChildIndex, {})
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: Object.assign({}, places)
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}
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function assignChildPlace (params, child) {
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if (child.data && child.data.attrs && child.data.attrs.place) {
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params[child.data.attrs.place] = child
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}
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return params
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}
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function assignChildIndex (params, child, index) {
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params[index] = child
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return params
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}
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function vnodeHasPlaceAttribute (vnode) {
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return Boolean(vnode.data && vnode.data.attrs && vnode.data.attrs.place)
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}
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