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/* @flow */
import { remove, isDef } from 'shared/util'
export default {
create (_: any, vnode: VNodeWithData) {
registerRef(vnode)
},
update (oldVnode: VNodeWithData, vnode: VNodeWithData) {
if (oldVnode.data.ref !== vnode.data.ref) {
registerRef(oldVnode, true)
registerRef(vnode)
}
},
destroy (vnode: VNodeWithData) {
registerRef(vnode, true)
}
}
export function registerRef (vnode: VNodeWithData, isRemoval: ?boolean) {
const key = vnode.data.ref
if (!isDef(key)) return
const vm = vnode.context
const ref = vnode.componentInstance || vnode.elm
const refs = vm.$refs
if (isRemoval) {
if (Array.isArray(refs[key])) {
remove(refs[key], ref)
} else if (refs[key] === ref) {
refs[key] = undefined
}
} else {
if (vnode.data.refInFor) {
if (!Array.isArray(refs[key])) {
refs[key] = [ref]
} else if (refs[key].indexOf(ref) < 0) {
// $flow-disable-line
refs[key].push(ref)
}
} else {
refs[key] = ref
}
}
}