marktext/src/muya/lib/parser/render/renderInlines/delEmStringFactory.js

import { CLASS_OR_ID } from '../../../config'
import { snakeToCamel } from '../../../utils'

// render factory of `del`,`em`,`strong`
export default function delEmStrongFac (type, h, cursor, block, token, outerClass) {
  const className = this.getClassName(outerClass, block, token, cursor)
  const COMMON_MARKER = `span.${className}.${CLASS_OR_ID['AG_REMOVE']}`
  const { marker } = token
  const { start, end } = token.range
  const backlashStart = end - marker.length - token.backlash.length
  const content = [
    ...token.children.reduce((acc, to) => {
      const chunk = this[snakeToCamel(to.type)](h, cursor, block, to, className)
      return Array.isArray(chunk) ? [...acc, ...chunk] : [...acc, chunk]
    }, []),
    ...this.backlashInToken(h, token.backlash, className, backlashStart, token)
  ]
  const startMarker = this.highlight(h, block, start, start + marker.length, token)
  const endMarker = this.highlight(h, block, end - marker.length, end, token)

  return [
    h(COMMON_MARKER, startMarker),
    h(`${type}.${CLASS_OR_ID['AG_INLINE_RULE']}`, content),
    h(COMMON_MARKER, endMarker)
  ]
}