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/**
* @typedef {import('micromark-util-types').Construct} Construct
* @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 {markdownLineEnding, markdownSpace} from 'micromark-util-character'
/** @type {Construct} */
export const codeIndented = {
name: 'codeIndented',
tokenize: tokenizeCodeIndented
}
/** @type {Construct} */
const furtherStart = {
tokenize: tokenizeFurtherStart,
partial: true
}
/**
* @this {TokenizeContext}
* @type {Tokenizer}
*/
function tokenizeCodeIndented(effects, ok, nok) {
const self = this
return start
/**
* Start of code (indented).
*
* > **Parsing note**: it is not needed to check if this first line is a
* > filled line (that it has a non-whitespace character), because blank lines
* > are parsed already, so we never run into that.
*
* ```markdown
* > | aaa
* ^
* ```
*
* @type {State}
*/
function start(code) {
// To do: manually check if interrupting like `markdown-rs`.
effects.enter('codeIndented')
// To do: use an improved `space_or_tab` function like `markdown-rs`,
// so that we can drop the next state.
return factorySpace(effects, afterPrefix, 'linePrefix', 4 + 1)(code)
}
/**
* At start, after 1 or 4 spaces.
*
* ```markdown
* > | aaa
* ^
* ```
*
* @type {State}
*/
function afterPrefix(code) {
const tail = self.events[self.events.length - 1]
return tail &&
tail[1].type === 'linePrefix' &&
tail[2].sliceSerialize(tail[1], true).length >= 4
? atBreak(code)
: nok(code)
}
/**
* At a break.
*
* ```markdown
* > | aaa
* ^ ^
* ```
*
* @type {State}
*/
function atBreak(code) {
if (code === null) {
return after(code)
}
if (markdownLineEnding(code)) {
return effects.attempt(furtherStart, atBreak, after)(code)
}
effects.enter('codeFlowValue')
return inside(code)
}
/**
* In code content.
*
* ```markdown
* > | aaa
* ^^^^
* ```
*
* @type {State}
*/
function inside(code) {
if (code === null || markdownLineEnding(code)) {
effects.exit('codeFlowValue')
return atBreak(code)
}
effects.consume(code)
return inside
}
/** @type {State} */
function after(code) {
effects.exit('codeIndented')
// To do: allow interrupting like `markdown-rs`.
// Feel free to interrupt.
// tokenizer.interrupt = false
return ok(code)
}
}
/**
* @this {TokenizeContext}
* @type {Tokenizer}
*/
function tokenizeFurtherStart(effects, ok, nok) {
const self = this
return furtherStart
/**
* At eol, trying to parse another indent.
*
* ```markdown
* > | aaa
* ^
* | bbb
* ```
*
* @type {State}
*/
function furtherStart(code) {
// To do: improve `lazy` / `pierce` handling.
// If this is a lazy line, it can’t be code.
if (self.parser.lazy[self.now().line]) {
return nok(code)
}
if (markdownLineEnding(code)) {
effects.enter('lineEnding')
effects.consume(code)
effects.exit('lineEnding')
return furtherStart
}
// To do: the code here in `micromark-js` is a bit different from
// `markdown-rs` because there it can attempt spaces.
// We can’t yet.
//
// To do: use an improved `space_or_tab` function like `markdown-rs`,
// so that we can drop the next state.
return factorySpace(effects, afterPrefix, 'linePrefix', 4 + 1)(code)
}
/**
* At start, after 1 or 4 spaces.
*
* ```markdown
* > | aaa
* ^
* ```
*
* @type {State}
*/
function afterPrefix(code) {
const tail = self.events[self.events.length - 1]
return tail &&
tail[1].type === 'linePrefix' &&
tail[2].sliceSerialize(tail[1], true).length >= 4
? ok(code)
: markdownLineEnding(code)
? furtherStart(code)
: nok(code)
}
}
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