sgauthier
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89 lines
2.4 KiB
JavaScript
89 lines
2.4 KiB
JavaScript
var characterReference = {
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name: 'characterReference',
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tokenize: tokenizeCharacterReference
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}
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export default characterReference
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import assert from 'assert'
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import decode from 'parse-entities/decode-entity.js'
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import asciiAlphanumeric from '../character/ascii-alphanumeric.mjs'
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import asciiDigit from '../character/ascii-digit.mjs'
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import asciiHexDigit from '../character/ascii-hex-digit.mjs'
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import codes from '../character/codes.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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function tokenizeCharacterReference(effects, ok, nok) {
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var self = this
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var size = 0
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var max
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var test
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return start
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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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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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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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function value(code) {
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var token
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if (code === codes.semicolon && size) {
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token = effects.exit(types.characterReferenceValue)
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if (test === asciiAlphanumeric && !decode(self.sliceSerialize(token))) {
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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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