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109 lines
2.9 KiB
Text
109 lines
2.9 KiB
Text
/**
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* @typedef {import('micromark-util-types').Construct} Construct
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* @typedef {import('micromark-util-types').Tokenizer} Tokenizer
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* @typedef {import('micromark-util-types').Token} Token
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* @typedef {import('micromark-util-types').State} State
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* @typedef {import('micromark-util-types').Code} Code
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*/
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import {ok as assert} from 'uvu/assert'
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import {decodeNamedCharacterReference} from 'decode-named-character-reference'
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import {
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asciiAlphanumeric,
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asciiDigit,
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asciiHexDigit
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} from 'micromark-util-character'
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import {codes} from 'micromark-util-symbol/codes.js'
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import {constants} from 'micromark-util-symbol/constants.js'
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import {types} from 'micromark-util-symbol/types.js'
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/** @type {Construct} */
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export const characterReference = {
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name: 'characterReference',
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tokenize: tokenizeCharacterReference
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}
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/** @type {Tokenizer} */
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function tokenizeCharacterReference(effects, ok, nok) {
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const self = this
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let size = 0
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/** @type {number} */
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let max
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/** @type {(code: Code) => code is number} */
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let test
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return start
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/** @type {State} */
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function start(code) {
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assert(code === codes.ampersand, 'expected `&`')
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effects.enter(types.characterReference)
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effects.enter(types.characterReferenceMarker)
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effects.consume(code)
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effects.exit(types.characterReferenceMarker)
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return open
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}
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/** @type {State} */
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function open(code) {
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if (code === codes.numberSign) {
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effects.enter(types.characterReferenceMarkerNumeric)
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effects.consume(code)
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effects.exit(types.characterReferenceMarkerNumeric)
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return numeric
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}
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effects.enter(types.characterReferenceValue)
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max = constants.characterReferenceNamedSizeMax
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test = asciiAlphanumeric
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return value(code)
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}
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/** @type {State} */
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function numeric(code) {
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if (code === codes.uppercaseX || code === codes.lowercaseX) {
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effects.enter(types.characterReferenceMarkerHexadecimal)
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effects.consume(code)
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effects.exit(types.characterReferenceMarkerHexadecimal)
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effects.enter(types.characterReferenceValue)
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max = constants.characterReferenceHexadecimalSizeMax
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test = asciiHexDigit
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return value
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}
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effects.enter(types.characterReferenceValue)
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max = constants.characterReferenceDecimalSizeMax
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test = asciiDigit
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return value(code)
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}
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/** @type {State} */
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function value(code) {
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/** @type {Token} */
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let token
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if (code === codes.semicolon && size) {
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token = effects.exit(types.characterReferenceValue)
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if (
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test === asciiAlphanumeric &&
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!decodeNamedCharacterReference(self.sliceSerialize(token))
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) {
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return nok(code)
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}
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effects.enter(types.characterReferenceMarker)
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effects.consume(code)
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effects.exit(types.characterReferenceMarker)
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effects.exit(types.characterReference)
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return ok
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}
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if (test(code) && size++ < max) {
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effects.consume(code)
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return value
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}
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return nok(code)
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}
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}
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