/* @flow */
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import { makeMap } from 'shared/util'
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// The "unitary tag" means that the tag node and its children
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// must be sent to the native together.
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const isUnitaryTag = makeMap('cell,header,cell-slot,recycle-list', true)
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function preTransformNode (el: ASTElement) {
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if (isUnitaryTag(el.tag) && !el.attrsList.some(item => item.name === 'append')) {
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el.attrsMap.append = 'tree'
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el.attrsList.push({ name: 'append', value: 'tree' })
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}
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if (el.attrsMap.append === 'tree') {
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el.appendAsTree = true
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}
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}
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function genData (el: ASTElement): string {
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return el.appendAsTree ? `appendAsTree:true,` : ''
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}
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export default {
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staticKeys: ['appendAsTree'],
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preTransformNode,
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genData
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}
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