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140 lines
2.9 KiB
Text
140 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').State} State
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*/
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import {
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asciiAlpha,
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asciiAlphanumeric,
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asciiAtext,
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asciiControl
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} from 'micromark-util-character'
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/** @type {Construct} */
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export const autolink = {
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name: 'autolink',
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tokenize: tokenizeAutolink
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}
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/** @type {Tokenizer} */
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function tokenizeAutolink(effects, ok, nok) {
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let size = 1
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return start
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/** @type {State} */
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function start(code) {
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effects.enter('autolink')
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effects.enter('autolinkMarker')
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effects.consume(code)
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effects.exit('autolinkMarker')
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effects.enter('autolinkProtocol')
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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 (asciiAlpha(code)) {
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effects.consume(code)
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return schemeOrEmailAtext
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}
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return asciiAtext(code) ? emailAtext(code) : nok(code)
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}
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/** @type {State} */
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function schemeOrEmailAtext(code) {
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return code === 43 || code === 45 || code === 46 || asciiAlphanumeric(code)
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? schemeInsideOrEmailAtext(code)
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: emailAtext(code)
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}
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/** @type {State} */
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function schemeInsideOrEmailAtext(code) {
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if (code === 58) {
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effects.consume(code)
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return urlInside
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}
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if (
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(code === 43 || code === 45 || code === 46 || asciiAlphanumeric(code)) &&
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size++ < 32
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) {
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effects.consume(code)
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return schemeInsideOrEmailAtext
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}
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return emailAtext(code)
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}
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/** @type {State} */
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function urlInside(code) {
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if (code === 62) {
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effects.exit('autolinkProtocol')
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return end(code)
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}
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if (code === null || code === 32 || code === 60 || asciiControl(code)) {
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return nok(code)
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}
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effects.consume(code)
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return urlInside
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}
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/** @type {State} */
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function emailAtext(code) {
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if (code === 64) {
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effects.consume(code)
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size = 0
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return emailAtSignOrDot
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}
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if (asciiAtext(code)) {
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effects.consume(code)
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return emailAtext
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}
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return nok(code)
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}
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/** @type {State} */
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function emailAtSignOrDot(code) {
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return asciiAlphanumeric(code) ? emailLabel(code) : nok(code)
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}
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/** @type {State} */
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function emailLabel(code) {
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if (code === 46) {
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effects.consume(code)
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size = 0
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return emailAtSignOrDot
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}
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if (code === 62) {
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// Exit, then change the type.
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effects.exit('autolinkProtocol').type = 'autolinkEmail'
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return end(code)
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}
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return emailValue(code)
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}
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/** @type {State} */
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function emailValue(code) {
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if ((code === 45 || asciiAlphanumeric(code)) && size++ < 63) {
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effects.consume(code)
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return code === 45 ? emailValue : emailLabel
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}
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return nok(code)
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}
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/** @type {State} */
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function end(code) {
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effects.enter('autolinkMarker')
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effects.consume(code)
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effects.exit('autolinkMarker')
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effects.exit('autolink')
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return ok
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}
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}
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