60 lines
1.4 KiB
JavaScript
60 lines
1.4 KiB
JavaScript
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/**
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* @typedef {import('nlcst').Paragraph} Paragraph
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* @typedef {import('nlcst').Sentence} Sentence
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*/
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import {toString} from 'nlcst-to-string'
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import {modifyChildren} from 'unist-util-modify-children'
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// Break a sentence if a white space with more than one new-line is found.
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export const breakImplicitSentences = modifyChildren(
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/**
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* @type {import('unist-util-modify-children').Modifier<Paragraph>}
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*/
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function (child, index, parent) {
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if (child.type !== 'SentenceNode') {
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return
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}
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const children = child.children
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// Ignore first and last child.
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let position = 0
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while (++position < children.length - 1) {
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const node = children[position]
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if (
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node.type !== 'WhiteSpaceNode' ||
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toString(node).split(/\r\n|\r|\n/).length < 3
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) {
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continue
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}
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child.children = children.slice(0, position)
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/** @type {Sentence} */
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const insertion = {
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type: 'SentenceNode',
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children: children.slice(position + 1)
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}
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const tail = children[position - 1]
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const head = children[position + 1]
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parent.children.splice(index + 1, 0, node, insertion)
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if (child.position && tail.position && head.position) {
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const end = child.position.end
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child.position.end = tail.position.end
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insertion.position = {start: head.position.start, end}
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}
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return index + 1
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}
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}
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)
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