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| 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 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 | 34x 34x 34x 34x 34x 34x 5x 5x 5x 8x 3x 3x 3x 3x 3x 34x 5x 5x 3x 3x 1x 1x 1x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 2x 2x 2x | import {
AttributeNode,
buildProps,
ComponentNode,
createCallExpression,
DirectiveNode,
findProp,
JSChildNode,
NodeTypes,
TransformContext
} from '@vue/compiler-dom'
import { SSR_RENDER_ATTRS } from '../runtimeHelpers'
import { processChildren, SSRTransformContext } from '../ssrCodegenTransform'
import { buildSSRProps } from './ssrTransformElement'
const wipMap = new WeakMap<ComponentNode, WIPEntry>()
interface WIPEntry {
tag: AttributeNode | DirectiveNode
propsExp: string | JSChildNode | null
}
// phase 1: build props
export function ssrTransformTransitionGroup(
node: ComponentNode,
context: TransformContext
) {
return () => {
const tag = findProp(node, 'tag')
if (tag) {
const otherProps = node.props.filter(p => p !== tag)
const { props, directives } = buildProps(
node,
context,
otherProps,
true /* isComponent */,
false /* isDynamicComponent */,
true /* ssr (skip event listeners) */
)
let propsExp = null
if (props || directives.length) {
propsExp = createCallExpression(context.helper(SSR_RENDER_ATTRS), [
buildSSRProps(props, directives, context)
])
}
wipMap.set(node, {
tag,
propsExp
})
}
}
}
// phase 2: process children
export function ssrProcessTransitionGroup(
node: ComponentNode,
context: SSRTransformContext
) {
const entry = wipMap.get(node)
if (entry) {
const { tag, propsExp } = entry
if (tag.type === NodeTypes.DIRECTIVE) {
// dynamic :tag
context.pushStringPart(`<`)
context.pushStringPart(tag.exp!)
if (propsExp) {
context.pushStringPart(propsExp)
}
context.pushStringPart(`>`)
processChildren(
node,
context,
false,
/**
* TransitionGroup has the special runtime behavior of flattening and
* concatenating all children into a single fragment (in order for them to
* be patched using the same key map) so we need to account for that here
* by disabling nested fragment wrappers from being generated.
*/
true
)
context.pushStringPart(`</`)
context.pushStringPart(tag.exp!)
context.pushStringPart(`>`)
} else {
// static tag
context.pushStringPart(`<${tag.value!.content}`)
if (propsExp) {
context.pushStringPart(propsExp)
}
context.pushStringPart(`>`)
processChildren(node, context, false, true)
context.pushStringPart(`</${tag.value!.content}>`)
}
} else {
// fragment
processChildren(node, context, true, true)
}
}
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