182 lines
4 KiB
JavaScript
182 lines
4 KiB
JavaScript
/**
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* @typedef {import('micromark-util-types').Construct} Construct
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* @typedef {import('micromark-util-types').Resolver} Resolver
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* @typedef {import('micromark-util-types').State} State
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* @typedef {import('micromark-util-types').Token} Token
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* @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext
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* @typedef {import('micromark-util-types').Tokenizer} Tokenizer
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*/
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import {factorySpace} from 'micromark-factory-space'
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import {markdownLineEnding} from 'micromark-util-character'
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import {subtokenize} from 'micromark-util-subtokenize'
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import {codes, constants, types} from 'micromark-util-symbol'
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import {ok as assert} from 'devlop'
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/**
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* No name because it must not be turned off.
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* @type {Construct}
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*/
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export const content = {tokenize: tokenizeContent, resolve: resolveContent}
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/** @type {Construct} */
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const continuationConstruct = {tokenize: tokenizeContinuation, partial: true}
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/**
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* Content is transparent: it’s parsed right now. That way, definitions are also
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* parsed right now: before text in paragraphs (specifically, media) are parsed.
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*
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* @type {Resolver}
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*/
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function resolveContent(events) {
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subtokenize(events)
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return events
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}
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/**
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* @this {TokenizeContext}
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* @type {Tokenizer}
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*/
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function tokenizeContent(effects, ok) {
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/** @type {Token | undefined} */
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let previous
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return chunkStart
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/**
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* Before a content chunk.
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*
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* ```markdown
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* > | abc
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* ^
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* ```
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*
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* @type {State}
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*/
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function chunkStart(code) {
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assert(
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code !== codes.eof && !markdownLineEnding(code),
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'expected no eof or eol'
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)
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effects.enter(types.content)
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previous = effects.enter(types.chunkContent, {
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contentType: constants.contentTypeContent
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})
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return chunkInside(code)
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}
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/**
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* In a content chunk.
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*
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* ```markdown
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* > | abc
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* ^^^
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* ```
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*
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* @type {State}
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*/
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function chunkInside(code) {
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if (code === codes.eof) {
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return contentEnd(code)
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}
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// To do: in `markdown-rs`, each line is parsed on its own, and everything
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// is stitched together resolving.
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if (markdownLineEnding(code)) {
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return effects.check(
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continuationConstruct,
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contentContinue,
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contentEnd
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)(code)
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}
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// Data.
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effects.consume(code)
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return chunkInside
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}
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/**
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*
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*
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* @type {State}
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*/
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function contentEnd(code) {
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effects.exit(types.chunkContent)
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effects.exit(types.content)
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return ok(code)
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}
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/**
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*
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*
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* @type {State}
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*/
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function contentContinue(code) {
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assert(markdownLineEnding(code), 'expected eol')
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effects.consume(code)
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effects.exit(types.chunkContent)
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assert(previous, 'expected previous token')
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previous.next = effects.enter(types.chunkContent, {
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contentType: constants.contentTypeContent,
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previous
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})
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previous = previous.next
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return chunkInside
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}
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}
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/**
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* @this {TokenizeContext}
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* @type {Tokenizer}
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*/
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function tokenizeContinuation(effects, ok, nok) {
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const self = this
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return startLookahead
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/**
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*
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*
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* @type {State}
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*/
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function startLookahead(code) {
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assert(markdownLineEnding(code), 'expected a line ending')
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effects.exit(types.chunkContent)
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effects.enter(types.lineEnding)
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effects.consume(code)
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effects.exit(types.lineEnding)
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return factorySpace(effects, prefixed, types.linePrefix)
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}
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/**
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*
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*
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* @type {State}
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*/
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function prefixed(code) {
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if (code === codes.eof || markdownLineEnding(code)) {
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return nok(code)
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}
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// Always populated by defaults.
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assert(
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self.parser.constructs.disable.null,
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'expected `disable.null` to be populated'
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)
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const tail = self.events[self.events.length - 1]
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if (
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!self.parser.constructs.disable.null.includes('codeIndented') &&
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tail &&
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tail[1].type === types.linePrefix &&
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tail[2].sliceSerialize(tail[1], true).length >= constants.tabSize
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) {
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return ok(code)
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}
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return effects.interrupt(self.parser.constructs.flow, nok, ok)(code)
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}
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}
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