ui/node_modules/micromark-core-commonmark/lib/block-quote.js

/**
 * @typedef {import('micromark-util-types').Construct} Construct
 * @typedef {import('micromark-util-types').Exiter} Exiter
 * @typedef {import('micromark-util-types').State} State
 * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext
 * @typedef {import('micromark-util-types').Tokenizer} Tokenizer
 */

import {factorySpace} from 'micromark-factory-space'
import {markdownSpace} from 'micromark-util-character'
/** @type {Construct} */
export const blockQuote = {
  name: 'blockQuote',
  tokenize: tokenizeBlockQuoteStart,
  continuation: {
    tokenize: tokenizeBlockQuoteContinuation
  },
  exit
}

/**
 * @this {TokenizeContext}
 * @type {Tokenizer}
 */
function tokenizeBlockQuoteStart(effects, ok, nok) {
  const self = this
  return start

  /**
   * Start of block quote.
   *
   * ```markdown
   * > | > a
   *     ^
   * ```
   *
   * @type {State}
   */
  function start(code) {
    if (code === 62) {
      const state = self.containerState
      if (!state.open) {
        effects.enter('blockQuote', {
          _container: true
        })
        state.open = true
      }
      effects.enter('blockQuotePrefix')
      effects.enter('blockQuoteMarker')
      effects.consume(code)
      effects.exit('blockQuoteMarker')
      return after
    }
    return nok(code)
  }

  /**
   * After `>`, before optional whitespace.
   *
   * ```markdown
   * > | > a
   *      ^
   * ```
   *
   * @type {State}
   */
  function after(code) {
    if (markdownSpace(code)) {
      effects.enter('blockQuotePrefixWhitespace')
      effects.consume(code)
      effects.exit('blockQuotePrefixWhitespace')
      effects.exit('blockQuotePrefix')
      return ok
    }
    effects.exit('blockQuotePrefix')
    return ok(code)
  }
}

/**
 * Start of block quote continuation.
 *
 * ```markdown
 *   | > a
 * > | > b
 *     ^
 * ```
 *
 * @this {TokenizeContext}
 * @type {Tokenizer}
 */
function tokenizeBlockQuoteContinuation(effects, ok, nok) {
  const self = this
  return contStart

  /**
   * Start of block quote continuation.
   *
   * Also used to parse the first block quote opening.
   *
   * ```markdown
   *   | > a
   * > | > b
   *     ^
   * ```
   *
   * @type {State}
   */
  function contStart(code) {
    if (markdownSpace(code)) {
      // Always populated by defaults.

      return factorySpace(
        effects,
        contBefore,
        'linePrefix',
        self.parser.constructs.disable.null.includes('codeIndented')
          ? undefined
          : 4
      )(code)
    }
    return contBefore(code)
  }

  /**
   * At `>`, after optional whitespace.
   *
   * Also used to parse the first block quote opening.
   *
   * ```markdown
   *   | > a
   * > | > b
   *     ^
   * ```
   *
   * @type {State}
   */
  function contBefore(code) {
    return effects.attempt(blockQuote, ok, nok)(code)
  }
}

/** @type {Exiter} */
function exit(effects) {
  effects.exit('blockQuote')
}