91 lines
2.5 KiB
Plaintext
91 lines
2.5 KiB
Plaintext
import {toString} from 'nlcst-to-string'
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import {visitChildren} from 'unist-util-visit-children'
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// Full stop characters that should not be treated as terminal sentence markers:
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// A case-insensitive abbreviation.
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import {terminalMarker} from '../expressions.js'
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// Merge non-terminal-marker full stops into the previous word (if available),
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// or the next word (if available).
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export const mergeRemainingFullStops = visitChildren(function (child) {
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const children = child.children
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let position = children.length
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let hasFoundDelimiter = false
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while (children[--position]) {
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const grandchild = children[position]
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if (
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grandchild.type !== 'SymbolNode' &&
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grandchild.type !== 'PunctuationNode'
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) {
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// This is a sentence without terminal marker, so we 'fool' the code to
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// make it think we have found one.
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if (grandchild.type === 'WordNode') {
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hasFoundDelimiter = true
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}
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continue
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}
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// Exit when this token is not a terminal marker.
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if (!terminalMarker.test(toString(grandchild))) {
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continue
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}
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// Ignore the first terminal marker found (starting at the end), as it
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// should not be merged.
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if (!hasFoundDelimiter) {
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hasFoundDelimiter = true
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continue
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}
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// Only merge a single full stop.
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if (toString(grandchild) !== '.') {
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continue
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}
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const previous = children[position - 1]
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const next = children[position + 1]
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if (previous && previous.type === 'WordNode') {
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const nextNext = children[position + 2]
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// Continue when the full stop is followed by a space and another full
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// stop, such as: `{.} .`
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if (
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next &&
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nextNext &&
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next.type === 'WhiteSpaceNode' &&
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toString(nextNext) === '.'
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) {
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continue
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}
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// Remove `child` from parent.
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children.splice(position, 1)
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// Add the punctuation mark at the end of the previous node.
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previous.children.push(grandchild)
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// Update position.
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if (grandchild.position && previous.position) {
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previous.position.end = grandchild.position.end
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}
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position--
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} else if (next && next.type === 'WordNode') {
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// Remove `child` from parent.
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children.splice(position, 1)
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// Add the punctuation mark at the start of the next node.
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next.children.unshift(grandchild)
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if (grandchild.position && next.position) {
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next.position.start = grandchild.position.start
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}
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}
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}
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})
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