40 lines
1.1 KiB
JavaScript
40 lines
1.1 KiB
JavaScript
/**
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* @typedef {import('nlcst').Paragraph} Paragraph
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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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import {digitStart} from '../expressions.js'
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// Merge a sentence into its previous sentence, when the sentence starts with a
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// lower case letter.
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export const mergeInitialDigitSentences = 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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const previous = parent.children[index - 1]
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if (
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previous &&
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previous.type === 'SentenceNode' &&
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child.type === 'SentenceNode'
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) {
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const head = child.children[0]
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if (head && head.type === 'WordNode' && digitStart.test(toString(head))) {
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previous.children.push(...child.children)
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parent.children.splice(index, 1)
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// Update position.
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if (previous.position && child.position) {
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previous.position.end = child.position.end
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}
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// Next, iterate over the node *now* at the current position.
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return index
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}
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}
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}
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)
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