35 lines
771 B
JavaScript
35 lines
771 B
JavaScript
'use strict'
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var visitChildren = require('unist-util-visit-children')
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module.exports = visitChildren(patchPosition)
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// Patch the position on a parent node based on its first and last child.
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function patchPosition(child, index, node) {
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var siblings = node.children
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if (!child.position) {
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return
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}
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if (
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index === 0 &&
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(!node.position || /* istanbul ignore next */ !node.position.start)
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) {
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patch(node)
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node.position.start = child.position.start
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}
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if (index === siblings.length - 1 && (!node.position || !node.position.end)) {
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patch(node)
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node.position.end = child.position.end
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}
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}
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// Add a `position` object when it does not yet exist on `node`.
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function patch(node) {
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if (!node.position) {
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node.position = {}
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}
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}
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