site/node_modules/micromark-factory-destination/index.js

/**
 * @typedef {import('micromark-util-types').Effects} Effects
 * @typedef {import('micromark-util-types').State} State
 * @typedef {import('micromark-util-types').TokenType} TokenType
 */

import {
  asciiControl,
  markdownLineEndingOrSpace,
  markdownLineEnding
} from 'micromark-util-character'
/**
 * Parse destinations.
 *
 * ###### Examples
 *
 * ```markdown
 * <a>
 * <a\>b>
 * <a b>
 * <a)>
 * a
 * a\)b
 * a(b)c
 * a(b)
 * ```
 *
 * @param {Effects} effects
 *   Context.
 * @param {State} ok
 *   State switched to when successful.
 * @param {State} nok
 *   State switched to when unsuccessful.
 * @param {TokenType} type
 *   Type for whole (`<a>` or `b`).
 * @param {TokenType} literalType
 *   Type when enclosed (`<a>`).
 * @param {TokenType} literalMarkerType
 *   Type for enclosing (`<` and `>`).
 * @param {TokenType} rawType
 *   Type when not enclosed (`b`).
 * @param {TokenType} stringType
 *   Type for the value (`a` or `b`).
 * @param {number | undefined} [max=Infinity]
 *   Depth of nested parens (inclusive).
 * @returns {State}
 *   Start state.
 */ // eslint-disable-next-line max-params
export function factoryDestination(
  effects,
  ok,
  nok,
  type,
  literalType,
  literalMarkerType,
  rawType,
  stringType,
  max
) {
  const limit = max || Number.POSITIVE_INFINITY
  let balance = 0
  return start

  /**
   * Start of destination.
   *
   * ```markdown
   * > | <aa>
   *     ^
   * > | aa
   *     ^
   * ```
   *
   * @type {State}
   */
  function start(code) {
    if (code === 60) {
      effects.enter(type)
      effects.enter(literalType)
      effects.enter(literalMarkerType)
      effects.consume(code)
      effects.exit(literalMarkerType)
      return enclosedBefore
    }

    // ASCII control, space, closing paren.
    if (code === null || code === 32 || code === 41 || asciiControl(code)) {
      return nok(code)
    }
    effects.enter(type)
    effects.enter(rawType)
    effects.enter(stringType)
    effects.enter('chunkString', {
      contentType: 'string'
    })
    return raw(code)
  }

  /**
   * After `<`, at an enclosed destination.
   *
   * ```markdown
   * > | <aa>
   *      ^
   * ```
   *
   * @type {State}
   */
  function enclosedBefore(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 enclosed(code)
  }

  /**
   * In enclosed destination.
   *
   * ```markdown
   * > | <aa>
   *      ^
   * ```
   *
   * @type {State}
   */
  function enclosed(code) {
    if (code === 62) {
      effects.exit('chunkString')
      effects.exit(stringType)
      return enclosedBefore(code)
    }
    if (code === null || code === 60 || markdownLineEnding(code)) {
      return nok(code)
    }
    effects.consume(code)
    return code === 92 ? enclosedEscape : enclosed
  }

  /**
   * After `\`, at a special character.
   *
   * ```markdown
   * > | <a\*a>
   *        ^
   * ```
   *
   * @type {State}
   */
  function enclosedEscape(code) {
    if (code === 60 || code === 62 || code === 92) {
      effects.consume(code)
      return enclosed
    }
    return enclosed(code)
  }

  /**
   * In raw destination.
   *
   * ```markdown
   * > | aa
   *     ^
   * ```
   *
   * @type {State}
   */
  function raw(code) {
    if (
      !balance &&
      (code === null || code === 41 || markdownLineEndingOrSpace(code))
    ) {
      effects.exit('chunkString')
      effects.exit(stringType)
      effects.exit(rawType)
      effects.exit(type)
      return ok(code)
    }
    if (balance < limit && code === 40) {
      effects.consume(code)
      balance++
      return raw
    }
    if (code === 41) {
      effects.consume(code)
      balance--
      return raw
    }

    // ASCII control (but *not* `\0`) and space and `(`.
    // Note: in `markdown-rs`, `\0` exists in codes, in `micromark-js` it
    // doesn’t.
    if (code === null || code === 32 || code === 40 || asciiControl(code)) {
      return nok(code)
    }
    effects.consume(code)
    return code === 92 ? rawEscape : raw
  }

  /**
   * After `\`, at special character.
   *
   * ```markdown
   * > | a\*a
   *       ^
   * ```
   *
   * @type {State}
   */
  function rawEscape(code) {
    if (code === 40 || code === 41 || code === 92) {
      effects.consume(code)
      return raw
    }
    return raw(code)
  }
}