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65 lines
1.4 KiB
65 lines
1.4 KiB
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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