43 lines
1.0 KiB
Plaintext
43 lines
1.0 KiB
Plaintext
import {toString} from 'nlcst-to-string'
|
|
import {modifyChildren} from 'unist-util-modify-children'
|
|
|
|
// Merge certain punctuation marks into their following words.
|
|
export const mergeInitialWordSymbol = modifyChildren(function (
|
|
child,
|
|
index,
|
|
parent
|
|
) {
|
|
if (
|
|
(child.type !== 'SymbolNode' && child.type !== 'PunctuationNode') ||
|
|
toString(child) !== '&'
|
|
) {
|
|
return
|
|
}
|
|
|
|
const children = parent.children
|
|
const next = children[index + 1]
|
|
|
|
// If either a previous word, or no following word, exists, exit early.
|
|
if (
|
|
(index > 0 && children[index - 1].type === 'WordNode') ||
|
|
!(next && next.type === 'WordNode')
|
|
) {
|
|
return
|
|
}
|
|
|
|
// Remove `child` from parent.
|
|
children.splice(index, 1)
|
|
|
|
// Add the punctuation mark at the start of the next node.
|
|
next.children.unshift(child)
|
|
|
|
// Update position.
|
|
if (next.position && child.position) {
|
|
next.position.start = child.position.start
|
|
}
|
|
|
|
// Next, iterate over the node at the previous position, as it's now adjacent
|
|
// to a following word.
|
|
return index - 1
|
|
})
|