micromark/dist/tokenize/factory-destination.mjs

small commonmark compliant markdown parser with positional info and concrete tokens

import markdownLineEnding from '../character/markdown-line-ending.mjs'
import markdownLineEndingOrSpace from '../character/markdown-line-ending-or-space.mjs'
import asciiControl from '../character/ascii-control.mjs'

// eslint-disable-next-line max-params
function destinationFactory(
  effects,
  ok,
  nok,
  type,
  literalType,
  literalMarkerType,
  rawType,
  stringType,
  max
) {
  var limit = max || Infinity
  var balance = 0
  return start

  function start(code) {
    if (code === 60) {
      effects.enter(type)
      effects.enter(literalType)
      effects.enter(literalMarkerType)
      effects.consume(code)
      effects.exit(literalMarkerType)
      return destinationEnclosedBefore
    }

    if (asciiControl(code)) {
      return nok(code)
    }

    effects.enter(type)
    effects.enter(rawType)
    effects.enter(stringType)
    effects.enter('chunkString', {
      contentType: 'string'
    })
    return destinationRaw(code)
  }

  function destinationEnclosedBefore(code) {
    if (code === 62) {
      effects.enter(literalMarkerType)
      effects.consume(code)
      effects.exit(literalMarkerType)
      effects.exit(literalType)
      effects.exit(type)
      return ok
    }

    effects.enter(stringType)
    effects.enter('chunkString', {
      contentType: 'string'
    })
    return destinationEnclosed(code)
  }

  function destinationEnclosed(code) {
    if (code === 62) {
      effects.exit('chunkString')
      effects.exit(stringType)
      return destinationEnclosedBefore(code)
    }

    if (code === null || code === 60 || markdownLineEnding(code)) {
      return nok(code)
    }

    effects.consume(code)
    return code === 92 ? destinationEnclosedEscape : destinationEnclosed
  }

  function destinationEnclosedEscape(code) {
    if (code === 60 || code === 62 || code === 92) {
      effects.consume(code)
      return destinationEnclosed
    }

    return destinationEnclosed(code)
  }

  function destinationRaw(code) {
    if (code === 40) {
      if (++balance > limit) return nok(code)
      effects.consume(code)
      return destinationRaw
    }

    if (code === 41) {
      if (!balance--) {
        effects.exit('chunkString')
        effects.exit(stringType)
        effects.exit(rawType)
        effects.exit(type)
        return ok(code)
      }

      effects.consume(code)
      return destinationRaw
    }

    if (code === null || markdownLineEndingOrSpace(code)) {
      if (balance) return nok(code)
      effects.exit('chunkString')
      effects.exit(stringType)
      effects.exit(rawType)
      effects.exit(type)
      return ok(code)
    }

    if (asciiControl(code)) return nok(code)
    effects.consume(code)
    return code === 92 ? destinationRawEscape : destinationRaw
  }

  function destinationRawEscape(code) {
    if (code === 40 || code === 41 || code === 92) {
      effects.consume(code)
      return destinationRaw
    }

    return destinationRaw(code)
  }
}

export default destinationFactory