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66 lines
1.4 KiB
JavaScript
66 lines
1.4 KiB
JavaScript
var thematicBreak = {
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name: 'thematicBreak',
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tokenize: tokenizeThematicBreak
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}
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export default thematicBreak
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import assert from 'assert'
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import codes from '../character/codes.mjs'
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import markdownLineEnding from '../character/markdown-line-ending.mjs'
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import markdownSpace from '../character/markdown-space.mjs'
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import constants from '../constant/constants.mjs'
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import types from '../constant/types.mjs'
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import spaceFactory from './factory-space.mjs'
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function tokenizeThematicBreak(effects, ok, nok) {
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var size = 0
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var marker
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return start
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function start(code) {
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assert(
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code === codes.asterisk ||
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code === codes.dash ||
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code === codes.underscore,
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'expected `*`, `-`, or `_`'
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)
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effects.enter(types.thematicBreak)
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marker = code
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return atBreak(code)
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}
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function atBreak(code) {
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if (code === marker) {
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effects.enter(types.thematicBreakSequence)
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return sequence(code)
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}
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if (markdownSpace(code)) {
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return spaceFactory(effects, atBreak, types.whitespace)(code)
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}
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if (
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size < constants.thematicBreakMarkerCountMin ||
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(code !== codes.eof && !markdownLineEnding(code))
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) {
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return nok(code)
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}
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effects.exit(types.thematicBreak)
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return ok(code)
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}
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function sequence(code) {
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if (code === marker) {
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effects.consume(code)
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size++
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return sequence
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}
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effects.exit(types.thematicBreakSequence)
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return atBreak(code)
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}
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}
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