Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | 87x 87x 87x 24x 24x 6x 18x 18x 18x 87x 34x 34x 2x 32x 44x 16x 16x 1x 16x | import { hasChanged } from '@vue/shared'
import { currentBlock, isBlockTreeEnabled, VNode } from '../vnode'
export function withMemo(
memo: any[],
render: () => VNode<any, any>,
cache: any[],
index: number
) {
const cached = cache[index] as VNode | undefined
if (cached && isMemoSame(cached, memo)) {
return cached
}
const ret = render()
// shallow clone
ret.memo = memo.slice()
return (cache[index] = ret)
}
export function isMemoSame(cached: VNode, memo: any[]) {
const prev: any[] = cached.memo!
if (prev.length != memo.length) {
return false
}
for (let i = 0; i < prev.length; i++) {
if (hasChanged(prev[i], memo[i])) {
return false
}
}
// make sure to let parent block track it when returning cached
if (isBlockTreeEnabled > 0 && currentBlock) {
currentBlock.push(cached)
}
return true
}
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