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40 lines
940 B
40 lines
940 B
/* @flow */
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import { _Set as Set, isObject } from '../util/index'
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import type { SimpleSet } from '../util/index'
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import VNode from '../vdom/vnode'
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const seenObjects = new Set()
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/**
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* Recursively traverse an object to evoke all converted
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* getters, so that every nested property inside the object
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* is collected as a "deep" dependency.
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*/
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export function traverse (val: any) {
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_traverse(val, seenObjects)
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seenObjects.clear()
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}
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function _traverse (val: any, seen: SimpleSet) {
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let i, keys
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const isA = Array.isArray(val)
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if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) {
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return
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}
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if (val.__ob__) {
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const depId = val.__ob__.dep.id
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if (seen.has(depId)) {
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return
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}
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seen.add(depId)
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}
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if (isA) {
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i = val.length
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while (i--) _traverse(val[i], seen)
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} else {
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keys = Object.keys(val)
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i = keys.length
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while (i--) _traverse(val[keys[i]], seen)
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}
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}
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