documentation/node_modules/micromark-extension-directive/lib/factory-attributes.js

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

import {factorySpace} from 'micromark-factory-space'
import {factoryWhitespace} from 'micromark-factory-whitespace'
import {
  asciiAlpha,
  asciiAlphanumeric,
  markdownLineEnding,
  markdownLineEndingOrSpace,
  markdownSpace
} from 'micromark-util-character'
/**
 * @param {Effects} effects
 * @param {State} ok
 * @param {State} nok
 * @param {TokenType} attributesType
 * @param {TokenType} attributesMarkerType
 * @param {TokenType} attributeType
 * @param {TokenType} attributeIdType
 * @param {TokenType} attributeClassType
 * @param {TokenType} attributeNameType
 * @param {TokenType} attributeInitializerType
 * @param {TokenType} attributeValueLiteralType
 * @param {TokenType} attributeValueType
 * @param {TokenType} attributeValueMarker
 * @param {TokenType} attributeValueData
 * @param {boolean | undefined} [disallowEol=false]
 */
export function factoryAttributes(
  effects,
  ok,
  nok,
  attributesType,
  attributesMarkerType,
  attributeType,
  attributeIdType,
  attributeClassType,
  attributeNameType,
  attributeInitializerType,
  attributeValueLiteralType,
  attributeValueType,
  attributeValueMarker,
  attributeValueData,
  disallowEol
) {
  /** @type {TokenType} */
  let type
  /** @type {Code | undefined} */
  let marker
  return start

  /** @type {State} */
  function start(code) {
    effects.enter(attributesType)
    effects.enter(attributesMarkerType)
    effects.consume(code)
    effects.exit(attributesMarkerType)
    return between
  }

  /** @type {State} */
  function between(code) {
    if (code === 35) {
      type = attributeIdType
      return shortcutStart(code)
    }
    if (code === 46) {
      type = attributeClassType
      return shortcutStart(code)
    }
    if (code === 58 || code === 95 || asciiAlpha(code)) {
      effects.enter(attributeType)
      effects.enter(attributeNameType)
      effects.consume(code)
      return name
    }
    if (disallowEol && markdownSpace(code)) {
      return factorySpace(effects, between, 'whitespace')(code)
    }
    if (!disallowEol && markdownLineEndingOrSpace(code)) {
      return factoryWhitespace(effects, between)(code)
    }
    return end(code)
  }

  /** @type {State} */
  function shortcutStart(code) {
    // Assume it’s registered.
    const markerType = /** @type {TokenType} */ type + 'Marker'
    effects.enter(attributeType)
    effects.enter(type)
    effects.enter(markerType)
    effects.consume(code)
    effects.exit(markerType)
    return shortcutStartAfter
  }

  /** @type {State} */
  function shortcutStartAfter(code) {
    if (
      code === null ||
      code === 34 ||
      code === 35 ||
      code === 39 ||
      code === 46 ||
      code === 60 ||
      code === 61 ||
      code === 62 ||
      code === 96 ||
      code === 125 ||
      markdownLineEndingOrSpace(code)
    ) {
      return nok(code)
    }

    // Assume it’s registered.
    const valueType = /** @type {TokenType} */ type + 'Value'
    effects.enter(valueType)
    effects.consume(code)
    return shortcut
  }

  /** @type {State} */
  function shortcut(code) {
    if (
      code === null ||
      code === 34 ||
      code === 39 ||
      code === 60 ||
      code === 61 ||
      code === 62 ||
      code === 96
    ) {
      return nok(code)
    }
    if (
      code === 35 ||
      code === 46 ||
      code === 125 ||
      markdownLineEndingOrSpace(code)
    ) {
      // Assume it’s registered.
      const valueType = /** @type {TokenType} */ type + 'Value'
      effects.exit(valueType)
      effects.exit(type)
      effects.exit(attributeType)
      return between(code)
    }
    effects.consume(code)
    return shortcut
  }

  /** @type {State} */
  function name(code) {
    if (
      code === 45 ||
      code === 46 ||
      code === 58 ||
      code === 95 ||
      asciiAlphanumeric(code)
    ) {
      effects.consume(code)
      return name
    }
    effects.exit(attributeNameType)
    if (disallowEol && markdownSpace(code)) {
      return factorySpace(effects, nameAfter, 'whitespace')(code)
    }
    if (!disallowEol && markdownLineEndingOrSpace(code)) {
      return factoryWhitespace(effects, nameAfter)(code)
    }
    return nameAfter(code)
  }

  /** @type {State} */
  function nameAfter(code) {
    if (code === 61) {
      effects.enter(attributeInitializerType)
      effects.consume(code)
      effects.exit(attributeInitializerType)
      return valueBefore
    }

    // Attribute w/o value.
    effects.exit(attributeType)
    return between(code)
  }

  /** @type {State} */
  function valueBefore(code) {
    if (
      code === null ||
      code === 60 ||
      code === 61 ||
      code === 62 ||
      code === 96 ||
      code === 125 ||
      (disallowEol && markdownLineEnding(code))
    ) {
      return nok(code)
    }
    if (code === 34 || code === 39) {
      effects.enter(attributeValueLiteralType)
      effects.enter(attributeValueMarker)
      effects.consume(code)
      effects.exit(attributeValueMarker)
      marker = code
      return valueQuotedStart
    }
    if (disallowEol && markdownSpace(code)) {
      return factorySpace(effects, valueBefore, 'whitespace')(code)
    }
    if (!disallowEol && markdownLineEndingOrSpace(code)) {
      return factoryWhitespace(effects, valueBefore)(code)
    }
    effects.enter(attributeValueType)
    effects.enter(attributeValueData)
    effects.consume(code)
    marker = undefined
    return valueUnquoted
  }

  /** @type {State} */
  function valueUnquoted(code) {
    if (
      code === null ||
      code === 34 ||
      code === 39 ||
      code === 60 ||
      code === 61 ||
      code === 62 ||
      code === 96
    ) {
      return nok(code)
    }
    if (code === 125 || markdownLineEndingOrSpace(code)) {
      effects.exit(attributeValueData)
      effects.exit(attributeValueType)
      effects.exit(attributeType)
      return between(code)
    }
    effects.consume(code)
    return valueUnquoted
  }

  /** @type {State} */
  function valueQuotedStart(code) {
    if (code === marker) {
      effects.enter(attributeValueMarker)
      effects.consume(code)
      effects.exit(attributeValueMarker)
      effects.exit(attributeValueLiteralType)
      effects.exit(attributeType)
      return valueQuotedAfter
    }
    effects.enter(attributeValueType)
    return valueQuotedBetween(code)
  }

  /** @type {State} */
  function valueQuotedBetween(code) {
    if (code === marker) {
      effects.exit(attributeValueType)
      return valueQuotedStart(code)
    }
    if (code === null) {
      return nok(code)
    }

    // Note: blank lines can’t exist in content.
    if (markdownLineEnding(code)) {
      return disallowEol
        ? nok(code)
        : factoryWhitespace(effects, valueQuotedBetween)(code)
    }
    effects.enter(attributeValueData)
    effects.consume(code)
    return valueQuoted
  }

  /** @type {State} */
  function valueQuoted(code) {
    if (code === marker || code === null || markdownLineEnding(code)) {
      effects.exit(attributeValueData)
      return valueQuotedBetween(code)
    }
    effects.consume(code)
    return valueQuoted
  }

  /** @type {State} */
  function valueQuotedAfter(code) {
    return code === 125 || markdownLineEndingOrSpace(code)
      ? between(code)
      : end(code)
  }

  /** @type {State} */
  function end(code) {
    if (code === 125) {
      effects.enter(attributesMarkerType)
      effects.consume(code)
      effects.exit(attributesMarkerType)
      effects.exit(attributesType)
      return ok
    }
    return nok(code)
  }
}