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/**
* @typedef {import('micromark-util-types').Effects} Effects
* @typedef {import('micromark-util-types').State} State
*/
import {factorySpace} from 'micromark-factory-space'
import {markdownLineEnding, markdownSpace} from 'micromark-util-character'
/**
* Parse spaces and tabs.
*
* There is no `nok` parameter:
*
* * line endings or spaces in markdown are often optional, in which case this
* factory can be used and `ok` will be switched to whether spaces were found
* or not
* * one line ending or space can be detected with
* `markdownLineEndingOrSpace(code)` right before using `factoryWhitespace`
*
* @param {Effects} effects
* Context.
* @param {State} ok
* State switched to when successful.
* @returns
* Start state.
*/
export function factoryWhitespace(effects, ok) {
/** @type {boolean} */
let seen
return start
/** @type {State} */
function start(code) {
if (markdownLineEnding(code)) {
effects.enter('lineEnding')
effects.consume(code)
effects.exit('lineEnding')
seen = true
return start
}
if (markdownSpace(code)) {
return factorySpace(
effects,
start,
seen ? 'linePrefix' : 'lineSuffix'
)(code)
}
return ok(code)
}
}
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