169 lines
3.4 KiB
JavaScript
169 lines
3.4 KiB
JavaScript
/**
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* @typedef {import('micromark-util-types').Code} Code
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* @typedef {import('micromark-util-types').Effects} Effects
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* @typedef {import('micromark-util-types').State} State
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* @typedef {import('micromark-util-types').TokenType} TokenType
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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 {codes, constants, types} from 'micromark-util-symbol'
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/**
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* Parse titles.
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*
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* ###### Examples
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*
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* ```markdown
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* "a"
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* 'b'
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* (c)
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* "a
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* b"
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* 'a
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* b'
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* (a\)b)
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* ```
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*
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* @param {Effects} effects
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* Context.
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* @param {State} ok
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* State switched to when successful.
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* @param {State} nok
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* State switched to when unsuccessful.
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* @param {TokenType} type
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* Type of the whole title (`"a"`, `'b'`, `(c)`).
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* @param {TokenType} markerType
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* Type for the markers (`"`, `'`, `(`, and `)`).
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* @param {TokenType} stringType
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* Type for the value (`a`).
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* @returns {State}
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* Start state.
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*/
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// eslint-disable-next-line max-params
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export function factoryTitle(effects, ok, nok, type, markerType, stringType) {
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/** @type {NonNullable<Code>} */
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let marker
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return start
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/**
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* Start of title.
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*
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* ```markdown
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* > | "a"
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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 start(code) {
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if (
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code === codes.quotationMark ||
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code === codes.apostrophe ||
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code === codes.leftParenthesis
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) {
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effects.enter(type)
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effects.enter(markerType)
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effects.consume(code)
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effects.exit(markerType)
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marker = code === codes.leftParenthesis ? codes.rightParenthesis : code
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return begin
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}
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return nok(code)
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}
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/**
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* After opening marker.
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*
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* This is also used at the closing marker.
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*
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* ```markdown
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* > | "a"
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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 begin(code) {
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if (code === marker) {
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effects.enter(markerType)
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effects.consume(code)
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effects.exit(markerType)
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effects.exit(type)
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return ok
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}
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effects.enter(stringType)
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return atBreak(code)
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}
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/**
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* At something, before something else.
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*
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* ```markdown
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* > | "a"
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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 atBreak(code) {
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if (code === marker) {
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effects.exit(stringType)
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return begin(marker)
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}
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if (code === codes.eof) {
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return nok(code)
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}
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// Note: blank lines can’t exist in content.
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if (markdownLineEnding(code)) {
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// To do: use `space_or_tab_eol_with_options`, connect.
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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, atBreak, types.linePrefix)
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}
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effects.enter(types.chunkString, {contentType: constants.contentTypeString})
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return inside(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 inside(code) {
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if (code === marker || code === codes.eof || markdownLineEnding(code)) {
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effects.exit(types.chunkString)
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return atBreak(code)
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}
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effects.consume(code)
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return code === codes.backslash ? escape : inside
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}
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/**
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* After `\`, at a special character.
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*
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* ```markdown
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* > | "a\*b"
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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 escape(code) {
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if (code === marker || code === codes.backslash) {
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effects.consume(code)
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return inside
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}
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return inside(code)
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}
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}
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