keep-alive.ts — vue Source File

Source Code

import { isRegExp, isArray, remove } from 'shared/util'
import { getFirstComponentChild } from 'core/vdom/helpers/index'
import type VNode from 'core/vdom/vnode'
import type { VNodeComponentOptions } from 'types/vnode'
import type { Component } from 'types/component'
import { getComponentName } from '../vdom/create-component'

type CacheEntry = {
  name?: string
  tag?: string
  componentInstance?: Component
}

type CacheEntryMap = Record<string, CacheEntry | null>

function _getComponentName(opts?: VNodeComponentOptions): string | null {
  return opts && (getComponentName(opts.Ctor.options as any) || opts.tag)
}

function matches(
  pattern: string | RegExp | Array<string>,
  name: string
): boolean {
  if (isArray(pattern)) {
    return pattern.indexOf(name) > -1
  } else if (typeof pattern === 'string') {
    return pattern.split(',').indexOf(name) > -1
  } else if (isRegExp(pattern)) {
    return pattern.test(name)
  }
  /* istanbul ignore next */
  return false
}

function pruneCache(
  keepAliveInstance: {
    cache: CacheEntryMap
    keys: string[]
    _vnode: VNode
    $vnode: VNode
  },
  filter: Function
) {
  const { cache, keys, _vnode, $vnode } = keepAliveInstance
  for (const key in cache) {
    const entry = cache[key]
    if (entry) {
      const name = entry.name
      if (name && !filter(name)) {
        pruneCacheEntry(cache, key, keys, _vnode)
      }
    }
  }
  $vnode.componentOptions!.children = undefined
}

function pruneCacheEntry(
  cache: CacheEntryMap,
  key: string,
  keys: Array<string>,
// ... (112 more lines)