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