\n * ^\n * |\n * ```\n *\n * @type {State}\n */\n function start(code) {\n effects.enter('lineEnding')\n effects.consume(code)\n effects.exit('lineEnding')\n return effects.attempt(blankLine, ok, nok)\n }\n}\n","/**\n * @typedef {import('micromark-util-types').Code} Code\n * @typedef {import('micromark-util-types').Construct} Construct\n * @typedef {import('micromark-util-types').State} State\n * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext\n * @typedef {import('micromark-util-types').Tokenizer} Tokenizer\n */\n\nimport {factorySpace} from 'micromark-factory-space'\nimport {markdownLineEnding, markdownSpace} from 'micromark-util-character'\n/** @type {Construct} */\nconst nonLazyContinuation = {\n tokenize: tokenizeNonLazyContinuation,\n partial: true\n}\n\n/** @type {Construct} */\nexport const codeFenced = {\n name: 'codeFenced',\n tokenize: tokenizeCodeFenced,\n concrete: true\n}\n\n/**\n * @this {TokenizeContext}\n * @type {Tokenizer}\n */\nfunction tokenizeCodeFenced(effects, ok, nok) {\n const self = this\n /** @type {Construct} */\n const closeStart = {\n tokenize: tokenizeCloseStart,\n partial: true\n }\n let initialPrefix = 0\n let sizeOpen = 0\n /** @type {NonNullable
} */\n let marker\n return start\n\n /**\n * Start of code.\n *\n * ```markdown\n * > | ~~~js\n * ^\n * | alert(1)\n * | ~~~\n * ```\n *\n * @type {State}\n */\n function start(code) {\n // To do: parse whitespace like `markdown-rs`.\n return beforeSequenceOpen(code)\n }\n\n /**\n * In opening fence, after prefix, at sequence.\n *\n * ```markdown\n * > | ~~~js\n * ^\n * | alert(1)\n * | ~~~\n * ```\n *\n * @type {State}\n */\n function beforeSequenceOpen(code) {\n const tail = self.events[self.events.length - 1]\n initialPrefix =\n tail && tail[1].type === 'linePrefix'\n ? tail[2].sliceSerialize(tail[1], true).length\n : 0\n marker = code\n effects.enter('codeFenced')\n effects.enter('codeFencedFence')\n effects.enter('codeFencedFenceSequence')\n return sequenceOpen(code)\n }\n\n /**\n * In opening fence sequence.\n *\n * ```markdown\n * > | ~~~js\n * ^\n * | alert(1)\n * | ~~~\n * ```\n *\n * @type {State}\n */\n function sequenceOpen(code) {\n if (code === marker) {\n sizeOpen++\n effects.consume(code)\n return sequenceOpen\n }\n if (sizeOpen < 3) {\n return nok(code)\n }\n effects.exit('codeFencedFenceSequence')\n return markdownSpace(code)\n ? factorySpace(effects, infoBefore, 'whitespace')(code)\n : infoBefore(code)\n }\n\n /**\n * In opening fence, after the sequence (and optional whitespace), before info.\n *\n * ```markdown\n * > | ~~~js\n * ^\n * | alert(1)\n * | ~~~\n * ```\n *\n * @type {State}\n */\n function infoBefore(code) {\n if (code === null || markdownLineEnding(code)) {\n effects.exit('codeFencedFence')\n return self.interrupt\n ? ok(code)\n : effects.check(nonLazyContinuation, atNonLazyBreak, after)(code)\n }\n effects.enter('codeFencedFenceInfo')\n effects.enter('chunkString', {\n contentType: 'string'\n })\n return info(code)\n }\n\n /**\n * In info.\n *\n * ```markdown\n * > | ~~~js\n * ^\n * | alert(1)\n * | ~~~\n * ```\n *\n * @type {State}\n */\n function info(code) {\n if (code === null || markdownLineEnding(code)) {\n effects.exit('chunkString')\n effects.exit('codeFencedFenceInfo')\n return infoBefore(code)\n }\n if (markdownSpace(code)) {\n effects.exit('chunkString')\n effects.exit('codeFencedFenceInfo')\n return factorySpace(effects, metaBefore, 'whitespace')(code)\n }\n if (code === 96 && code === marker) {\n return nok(code)\n }\n effects.consume(code)\n return info\n }\n\n /**\n * In opening fence, after info and whitespace, before meta.\n *\n * ```markdown\n * > | ~~~js eval\n * ^\n * | alert(1)\n * | ~~~\n * ```\n *\n * @type {State}\n */\n function metaBefore(code) {\n if (code === null || markdownLineEnding(code)) {\n return infoBefore(code)\n }\n effects.enter('codeFencedFenceMeta')\n effects.enter('chunkString', {\n contentType: 'string'\n })\n return meta(code)\n }\n\n /**\n * In meta.\n *\n * ```markdown\n * > | ~~~js eval\n * ^\n * | alert(1)\n * | ~~~\n * ```\n *\n * @type {State}\n */\n function meta(code) {\n if (code === null || markdownLineEnding(code)) {\n effects.exit('chunkString')\n effects.exit('codeFencedFenceMeta')\n return infoBefore(code)\n }\n if (code === 96 && code === marker) {\n return nok(code)\n }\n effects.consume(code)\n return meta\n }\n\n /**\n * At eol/eof in code, before a non-lazy closing fence or content.\n *\n * ```markdown\n * > | ~~~js\n * ^\n * > | alert(1)\n * ^\n * | ~~~\n * ```\n *\n * @type {State}\n */\n function atNonLazyBreak(code) {\n return effects.attempt(closeStart, after, contentBefore)(code)\n }\n\n /**\n * Before code content, not a closing fence, at eol.\n *\n * ```markdown\n * | ~~~js\n * > | alert(1)\n * ^\n * | ~~~\n * ```\n *\n * @type {State}\n */\n function contentBefore(code) {\n effects.enter('lineEnding')\n effects.consume(code)\n effects.exit('lineEnding')\n return contentStart\n }\n\n /**\n * Before code content, not a closing fence.\n *\n * ```markdown\n * | ~~~js\n * > | alert(1)\n * ^\n * | ~~~\n * ```\n *\n * @type {State}\n */\n function contentStart(code) {\n return initialPrefix > 0 && markdownSpace(code)\n ? factorySpace(\n effects,\n beforeContentChunk,\n 'linePrefix',\n initialPrefix + 1\n )(code)\n : beforeContentChunk(code)\n }\n\n /**\n * Before code content, after optional prefix.\n *\n * ```markdown\n * | ~~~js\n * > | alert(1)\n * ^\n * | ~~~\n * ```\n *\n * @type {State}\n */\n function beforeContentChunk(code) {\n if (code === null || markdownLineEnding(code)) {\n return effects.check(nonLazyContinuation, atNonLazyBreak, after)(code)\n }\n effects.enter('codeFlowValue')\n return contentChunk(code)\n }\n\n /**\n * In code content.\n *\n * ```markdown\n * | ~~~js\n * > | alert(1)\n * ^^^^^^^^\n * | ~~~\n * ```\n *\n * @type {State}\n */\n function contentChunk(code) {\n if (code === null || markdownLineEnding(code)) {\n effects.exit('codeFlowValue')\n return beforeContentChunk(code)\n }\n effects.consume(code)\n return contentChunk\n }\n\n /**\n * After code.\n *\n * ```markdown\n * | ~~~js\n * | alert(1)\n * > | ~~~\n * ^\n * ```\n *\n * @type {State}\n */\n function after(code) {\n effects.exit('codeFenced')\n return ok(code)\n }\n\n /**\n * @this {TokenizeContext}\n * @type {Tokenizer}\n */\n function tokenizeCloseStart(effects, ok, nok) {\n let size = 0\n return startBefore\n\n /**\n *\n *\n * @type {State}\n */\n function startBefore(code) {\n effects.enter('lineEnding')\n effects.consume(code)\n effects.exit('lineEnding')\n return start\n }\n\n /**\n * Before closing fence, at optional whitespace.\n *\n * ```markdown\n * | ~~~js\n * | alert(1)\n * > | ~~~\n * ^\n * ```\n *\n * @type {State}\n */\n function start(code) {\n // Always populated by defaults.\n\n // To do: `enter` here or in next state?\n effects.enter('codeFencedFence')\n return markdownSpace(code)\n ? factorySpace(\n effects,\n beforeSequenceClose,\n 'linePrefix',\n self.parser.constructs.disable.null.includes('codeIndented')\n ? undefined\n : 4\n )(code)\n : beforeSequenceClose(code)\n }\n\n /**\n * In closing fence, after optional whitespace, at sequence.\n *\n * ```markdown\n * | ~~~js\n * | alert(1)\n * > | ~~~\n * ^\n * ```\n *\n * @type {State}\n */\n function beforeSequenceClose(code) {\n if (code === marker) {\n effects.enter('codeFencedFenceSequence')\n return sequenceClose(code)\n }\n return nok(code)\n }\n\n /**\n * In closing fence sequence.\n *\n * ```markdown\n * | ~~~js\n * | alert(1)\n * > | ~~~\n * ^\n * ```\n *\n * @type {State}\n */\n function sequenceClose(code) {\n if (code === marker) {\n size++\n effects.consume(code)\n return sequenceClose\n }\n if (size >= sizeOpen) {\n effects.exit('codeFencedFenceSequence')\n return markdownSpace(code)\n ? factorySpace(effects, sequenceCloseAfter, 'whitespace')(code)\n : sequenceCloseAfter(code)\n }\n return nok(code)\n }\n\n /**\n * After closing fence sequence, after optional whitespace.\n *\n * ```markdown\n * | ~~~js\n * | alert(1)\n * > | ~~~\n * ^\n * ```\n *\n * @type {State}\n */\n function sequenceCloseAfter(code) {\n if (code === null || markdownLineEnding(code)) {\n effects.exit('codeFencedFence')\n return ok(code)\n }\n return nok(code)\n }\n }\n}\n\n/**\n * @this {TokenizeContext}\n * @type {Tokenizer}\n */\nfunction tokenizeNonLazyContinuation(effects, ok, nok) {\n const self = this\n return start\n\n /**\n *\n *\n * @type {State}\n */\n function start(code) {\n if (code === null) {\n return nok(code)\n }\n effects.enter('lineEnding')\n effects.consume(code)\n effects.exit('lineEnding')\n return lineStart\n }\n\n /**\n *\n *\n * @type {State}\n */\n function lineStart(code) {\n return self.parser.lazy[self.now().line] ? nok(code) : ok(code)\n }\n}\n","/// \n\n/* eslint-env browser */\n\nconst element = document.createElement('i')\n\n/**\n * @param {string} value\n * @returns {string|false}\n */\nexport function decodeNamedCharacterReference(value) {\n const characterReference = '&' + value + ';'\n element.innerHTML = characterReference\n const char = element.textContent\n\n // Some named character references do not require the closing semicolon\n // (`¬`, for instance), which leads to situations where parsing the assumed\n // named reference of `¬it;` will result in the string `¬it;`.\n // When we encounter a trailing semicolon after parsing, and the character\n // reference to decode was not a semicolon (`;`), we can assume that the\n // matching was not complete.\n // @ts-expect-error: TypeScript is wrong that `textContent` on elements can\n // yield `null`.\n if (char.charCodeAt(char.length - 1) === 59 /* `;` */ && value !== 'semi') {\n return false\n }\n\n // If the decoded string is equal to the input, the character reference was\n // not valid.\n // @ts-expect-error: TypeScript is wrong that `textContent` on elements can\n // yield `null`.\n return char === characterReference ? false : char\n}\n","/**\n * @typedef {import('micromark-util-types').Code} Code\n * @typedef {import('micromark-util-types').Construct} Construct\n * @typedef {import('micromark-util-types').State} State\n * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext\n * @typedef {import('micromark-util-types').Tokenizer} Tokenizer\n */\n\nimport {decodeNamedCharacterReference} from 'decode-named-character-reference'\nimport {\n asciiAlphanumeric,\n asciiDigit,\n asciiHexDigit\n} from 'micromark-util-character'\n/** @type {Construct} */\nexport const characterReference = {\n name: 'characterReference',\n tokenize: tokenizeCharacterReference\n}\n\n/**\n * @this {TokenizeContext}\n * @type {Tokenizer}\n */\nfunction tokenizeCharacterReference(effects, ok, nok) {\n const self = this\n let size = 0\n /** @type {number} */\n let max\n /** @type {(code: Code) => boolean} */\n let test\n return start\n\n /**\n * Start of character reference.\n *\n * ```markdown\n * > | a&b\n * ^\n * > | a{b\n * ^\n * > | a b\n * ^\n * ```\n *\n * @type {State}\n */\n function start(code) {\n effects.enter('characterReference')\n effects.enter('characterReferenceMarker')\n effects.consume(code)\n effects.exit('characterReferenceMarker')\n return open\n }\n\n /**\n * After `&`, at `#` for numeric references or alphanumeric for named\n * references.\n *\n * ```markdown\n * > | a&b\n * ^\n * > | a{b\n * ^\n * > | a b\n * ^\n * ```\n *\n * @type {State}\n */\n function open(code) {\n if (code === 35) {\n effects.enter('characterReferenceMarkerNumeric')\n effects.consume(code)\n effects.exit('characterReferenceMarkerNumeric')\n return numeric\n }\n effects.enter('characterReferenceValue')\n max = 31\n test = asciiAlphanumeric\n return value(code)\n }\n\n /**\n * After `#`, at `x` for hexadecimals or digit for decimals.\n *\n * ```markdown\n * > | a{b\n * ^\n * > | a b\n * ^\n * ```\n *\n * @type {State}\n */\n function numeric(code) {\n if (code === 88 || code === 120) {\n effects.enter('characterReferenceMarkerHexadecimal')\n effects.consume(code)\n effects.exit('characterReferenceMarkerHexadecimal')\n effects.enter('characterReferenceValue')\n max = 6\n test = asciiHexDigit\n return value\n }\n effects.enter('characterReferenceValue')\n max = 7\n test = asciiDigit\n return value(code)\n }\n\n /**\n * After markers (`&#x`, `&#`, or `&`), in value, before `;`.\n *\n * The character reference kind defines what and how many characters are\n * allowed.\n *\n * ```markdown\n * > | a&b\n * ^^^\n * > | a{b\n * ^^^\n * > | a b\n * ^\n * ```\n *\n * @type {State}\n */\n function value(code) {\n if (code === 59 && size) {\n const token = effects.exit('characterReferenceValue')\n if (\n test === asciiAlphanumeric &&\n !decodeNamedCharacterReference(self.sliceSerialize(token))\n ) {\n return nok(code)\n }\n\n // To do: `markdown-rs` uses a different name:\n // `CharacterReferenceMarkerSemi`.\n effects.enter('characterReferenceMarker')\n effects.consume(code)\n effects.exit('characterReferenceMarker')\n effects.exit('characterReference')\n return ok\n }\n if (test(code) && size++ < max) {\n effects.consume(code)\n return value\n }\n return nok(code)\n }\n}\n","/**\n * @typedef {import('micromark-util-types').Construct} Construct\n * @typedef {import('micromark-util-types').State} State\n * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext\n * @typedef {import('micromark-util-types').Tokenizer} Tokenizer\n */\n\nimport {asciiPunctuation} from 'micromark-util-character'\n/** @type {Construct} */\nexport const characterEscape = {\n name: 'characterEscape',\n tokenize: tokenizeCharacterEscape\n}\n\n/**\n * @this {TokenizeContext}\n * @type {Tokenizer}\n */\nfunction tokenizeCharacterEscape(effects, ok, nok) {\n return start\n\n /**\n * Start of character escape.\n *\n * ```markdown\n * > | a\\*b\n * ^\n * ```\n *\n * @type {State}\n */\n function start(code) {\n effects.enter('characterEscape')\n effects.enter('escapeMarker')\n effects.consume(code)\n effects.exit('escapeMarker')\n return inside\n }\n\n /**\n * After `\\`, at punctuation.\n *\n * ```markdown\n * > | a\\*b\n * ^\n * ```\n *\n * @type {State}\n */\n function inside(code) {\n // ASCII punctuation.\n if (asciiPunctuation(code)) {\n effects.enter('characterEscapeValue')\n effects.consume(code)\n effects.exit('characterEscapeValue')\n effects.exit('characterEscape')\n return ok\n }\n return nok(code)\n }\n}\n","/**\n * @typedef {import('micromark-util-types').Construct} Construct\n * @typedef {import('micromark-util-types').State} State\n * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext\n * @typedef {import('micromark-util-types').Tokenizer} Tokenizer\n */\n\nimport {factorySpace} from 'micromark-factory-space'\nimport {markdownLineEnding} from 'micromark-util-character'\n/** @type {Construct} */\nexport const lineEnding = {\n name: 'lineEnding',\n tokenize: tokenizeLineEnding\n}\n\n/**\n * @this {TokenizeContext}\n * @type {Tokenizer}\n */\nfunction tokenizeLineEnding(effects, ok) {\n return start\n\n /** @type {State} */\n function start(code) {\n effects.enter('lineEnding')\n effects.consume(code)\n effects.exit('lineEnding')\n return factorySpace(effects, ok, 'linePrefix')\n }\n}\n","/**\n * @typedef {import('micromark-util-types').Construct} Construct\n * @typedef {import('micromark-util-types').Event} Event\n * @typedef {import('micromark-util-types').Resolver} Resolver\n * @typedef {import('micromark-util-types').State} State\n * @typedef {import('micromark-util-types').Token} Token\n * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext\n * @typedef {import('micromark-util-types').Tokenizer} Tokenizer\n */\n\nimport {factoryDestination} from 'micromark-factory-destination'\nimport {factoryLabel} from 'micromark-factory-label'\nimport {factoryTitle} from 'micromark-factory-title'\nimport {factoryWhitespace} from 'micromark-factory-whitespace'\nimport {markdownLineEndingOrSpace} from 'micromark-util-character'\nimport {push, splice} from 'micromark-util-chunked'\nimport {normalizeIdentifier} from 'micromark-util-normalize-identifier'\nimport {resolveAll} from 'micromark-util-resolve-all'\n/** @type {Construct} */\nexport const labelEnd = {\n name: 'labelEnd',\n tokenize: tokenizeLabelEnd,\n resolveTo: resolveToLabelEnd,\n resolveAll: resolveAllLabelEnd\n}\n\n/** @type {Construct} */\nconst resourceConstruct = {\n tokenize: tokenizeResource\n}\n/** @type {Construct} */\nconst referenceFullConstruct = {\n tokenize: tokenizeReferenceFull\n}\n/** @type {Construct} */\nconst referenceCollapsedConstruct = {\n tokenize: tokenizeReferenceCollapsed\n}\n\n/** @type {Resolver} */\nfunction resolveAllLabelEnd(events) {\n let index = -1\n while (++index < events.length) {\n const token = events[index][1]\n if (\n token.type === 'labelImage' ||\n token.type === 'labelLink' ||\n token.type === 'labelEnd'\n ) {\n // Remove the marker.\n events.splice(index + 1, token.type === 'labelImage' ? 4 : 2)\n token.type = 'data'\n index++\n }\n }\n return events\n}\n\n/** @type {Resolver} */\nfunction resolveToLabelEnd(events, context) {\n let index = events.length\n let offset = 0\n /** @type {Token} */\n let token\n /** @type {number | undefined} */\n let open\n /** @type {number | undefined} */\n let close\n /** @type {Array} */\n let media\n\n // Find an opening.\n while (index--) {\n token = events[index][1]\n if (open) {\n // If we see another link, or inactive link label, we’ve been here before.\n if (\n token.type === 'link' ||\n (token.type === 'labelLink' && token._inactive)\n ) {\n break\n }\n\n // Mark other link openings as inactive, as we can’t have links in\n // links.\n if (events[index][0] === 'enter' && token.type === 'labelLink') {\n token._inactive = true\n }\n } else if (close) {\n if (\n events[index][0] === 'enter' &&\n (token.type === 'labelImage' || token.type === 'labelLink') &&\n !token._balanced\n ) {\n open = index\n if (token.type !== 'labelLink') {\n offset = 2\n break\n }\n }\n } else if (token.type === 'labelEnd') {\n close = index\n }\n }\n const group = {\n type: events[open][1].type === 'labelLink' ? 'link' : 'image',\n start: Object.assign({}, events[open][1].start),\n end: Object.assign({}, events[events.length - 1][1].end)\n }\n const label = {\n type: 'label',\n start: Object.assign({}, events[open][1].start),\n end: Object.assign({}, events[close][1].end)\n }\n const text = {\n type: 'labelText',\n start: Object.assign({}, events[open + offset + 2][1].end),\n end: Object.assign({}, events[close - 2][1].start)\n }\n media = [\n ['enter', group, context],\n ['enter', label, context]\n ]\n\n // Opening marker.\n media = push(media, events.slice(open + 1, open + offset + 3))\n\n // Text open.\n media = push(media, [['enter', text, context]])\n\n // Always populated by defaults.\n\n // Between.\n media = push(\n media,\n resolveAll(\n context.parser.constructs.insideSpan.null,\n events.slice(open + offset + 4, close - 3),\n context\n )\n )\n\n // Text close, marker close, label close.\n media = push(media, [\n ['exit', text, context],\n events[close - 2],\n events[close - 1],\n ['exit', label, context]\n ])\n\n // Reference, resource, or so.\n media = push(media, events.slice(close + 1))\n\n // Media close.\n media = push(media, [['exit', group, context]])\n splice(events, open, events.length, media)\n return events\n}\n\n/**\n * @this {TokenizeContext}\n * @type {Tokenizer}\n */\nfunction tokenizeLabelEnd(effects, ok, nok) {\n const self = this\n let index = self.events.length\n /** @type {Token} */\n let labelStart\n /** @type {boolean} */\n let defined\n\n // Find an opening.\n while (index--) {\n if (\n (self.events[index][1].type === 'labelImage' ||\n self.events[index][1].type === 'labelLink') &&\n !self.events[index][1]._balanced\n ) {\n labelStart = self.events[index][1]\n break\n }\n }\n return start\n\n /**\n * Start of label end.\n *\n * ```markdown\n * > | [a](b) c\n * ^\n * > | [a][b] c\n * ^\n * > | [a][] b\n * ^\n * > | [a] b\n * ```\n *\n * @type {State}\n */\n function start(code) {\n // If there is not an okay opening.\n if (!labelStart) {\n return nok(code)\n }\n\n // If the corresponding label (link) start is marked as inactive,\n // it means we’d be wrapping a link, like this:\n //\n // ```markdown\n // > | a [b [c](d) e](f) g.\n // ^\n // ```\n //\n // We can’t have that, so it’s just balanced brackets.\n if (labelStart._inactive) {\n return labelEndNok(code)\n }\n defined = self.parser.defined.includes(\n normalizeIdentifier(\n self.sliceSerialize({\n start: labelStart.end,\n end: self.now()\n })\n )\n )\n effects.enter('labelEnd')\n effects.enter('labelMarker')\n effects.consume(code)\n effects.exit('labelMarker')\n effects.exit('labelEnd')\n return after\n }\n\n /**\n * After `]`.\n *\n * ```markdown\n * > | [a](b) c\n * ^\n * > | [a][b] c\n * ^\n * > | [a][] b\n * ^\n * > | [a] b\n * ^\n * ```\n *\n * @type {State}\n */\n function after(code) {\n // Note: `markdown-rs` also parses GFM footnotes here, which for us is in\n // an extension.\n\n // Resource (`[asd](fgh)`)?\n if (code === 40) {\n return effects.attempt(\n resourceConstruct,\n labelEndOk,\n defined ? labelEndOk : labelEndNok\n )(code)\n }\n\n // Full (`[asd][fgh]`) or collapsed (`[asd][]`) reference?\n if (code === 91) {\n return effects.attempt(\n referenceFullConstruct,\n labelEndOk,\n defined ? referenceNotFull : labelEndNok\n )(code)\n }\n\n // Shortcut (`[asd]`) reference?\n return defined ? labelEndOk(code) : labelEndNok(code)\n }\n\n /**\n * After `]`, at `[`, but not at a full reference.\n *\n * > 👉 **Note**: we only get here if the label is defined.\n *\n * ```markdown\n * > | [a][] b\n * ^\n * > | [a] b\n * ^\n * ```\n *\n * @type {State}\n */\n function referenceNotFull(code) {\n return effects.attempt(\n referenceCollapsedConstruct,\n labelEndOk,\n labelEndNok\n )(code)\n }\n\n /**\n * Done, we found something.\n *\n * ```markdown\n * > | [a](b) c\n * ^\n * > | [a][b] c\n * ^\n * > | [a][] b\n * ^\n * > | [a] b\n * ^\n * ```\n *\n * @type {State}\n */\n function labelEndOk(code) {\n // Note: `markdown-rs` does a bunch of stuff here.\n return ok(code)\n }\n\n /**\n * Done, it’s nothing.\n *\n * There was an okay opening, but we didn’t match anything.\n *\n * ```markdown\n * > | [a](b c\n * ^\n * > | [a][b c\n * ^\n * > | [a] b\n * ^\n * ```\n *\n * @type {State}\n */\n function labelEndNok(code) {\n labelStart._balanced = true\n return nok(code)\n }\n}\n\n/**\n * @this {TokenizeContext}\n * @type {Tokenizer}\n */\nfunction tokenizeResource(effects, ok, nok) {\n return resourceStart\n\n /**\n * At a resource.\n *\n * ```markdown\n * > | [a](b) c\n * ^\n * ```\n *\n * @type {State}\n */\n function resourceStart(code) {\n effects.enter('resource')\n effects.enter('resourceMarker')\n effects.consume(code)\n effects.exit('resourceMarker')\n return resourceBefore\n }\n\n /**\n * In resource, after `(`, at optional whitespace.\n *\n * ```markdown\n * > | [a](b) c\n * ^\n * ```\n *\n * @type {State}\n */\n function resourceBefore(code) {\n return markdownLineEndingOrSpace(code)\n ? factoryWhitespace(effects, resourceOpen)(code)\n : resourceOpen(code)\n }\n\n /**\n * In resource, after optional whitespace, at `)` or a destination.\n *\n * ```markdown\n * > | [a](b) c\n * ^\n * ```\n *\n * @type {State}\n */\n function resourceOpen(code) {\n if (code === 41) {\n return resourceEnd(code)\n }\n return factoryDestination(\n effects,\n resourceDestinationAfter,\n resourceDestinationMissing,\n 'resourceDestination',\n 'resourceDestinationLiteral',\n 'resourceDestinationLiteralMarker',\n 'resourceDestinationRaw',\n 'resourceDestinationString',\n 32\n )(code)\n }\n\n /**\n * In resource, after destination, at optional whitespace.\n *\n * ```markdown\n * > | [a](b) c\n * ^\n * ```\n *\n * @type {State}\n */\n function resourceDestinationAfter(code) {\n return markdownLineEndingOrSpace(code)\n ? factoryWhitespace(effects, resourceBetween)(code)\n : resourceEnd(code)\n }\n\n /**\n * At invalid destination.\n *\n * ```markdown\n * > | [a](<<) b\n * ^\n * ```\n *\n * @type {State}\n */\n function resourceDestinationMissing(code) {\n return nok(code)\n }\n\n /**\n * In resource, after destination and whitespace, at `(` or title.\n *\n * ```markdown\n * > | [a](b ) c\n * ^\n * ```\n *\n * @type {State}\n */\n function resourceBetween(code) {\n if (code === 34 || code === 39 || code === 40) {\n return factoryTitle(\n effects,\n resourceTitleAfter,\n nok,\n 'resourceTitle',\n 'resourceTitleMarker',\n 'resourceTitleString'\n )(code)\n }\n return resourceEnd(code)\n }\n\n /**\n * In resource, after title, at optional whitespace.\n *\n * ```markdown\n * > | [a](b \"c\") d\n * ^\n * ```\n *\n * @type {State}\n */\n function resourceTitleAfter(code) {\n return markdownLineEndingOrSpace(code)\n ? factoryWhitespace(effects, resourceEnd)(code)\n : resourceEnd(code)\n }\n\n /**\n * In resource, at `)`.\n *\n * ```markdown\n * > | [a](b) d\n * ^\n * ```\n *\n * @type {State}\n */\n function resourceEnd(code) {\n if (code === 41) {\n effects.enter('resourceMarker')\n effects.consume(code)\n effects.exit('resourceMarker')\n effects.exit('resource')\n return ok\n }\n return nok(code)\n }\n}\n\n/**\n * @this {TokenizeContext}\n * @type {Tokenizer}\n */\nfunction tokenizeReferenceFull(effects, ok, nok) {\n const self = this\n return referenceFull\n\n /**\n * In a reference (full), at the `[`.\n *\n * ```markdown\n * > | [a][b] d\n * ^\n * ```\n *\n * @type {State}\n */\n function referenceFull(code) {\n return factoryLabel.call(\n self,\n effects,\n referenceFullAfter,\n referenceFullMissing,\n 'reference',\n 'referenceMarker',\n 'referenceString'\n )(code)\n }\n\n /**\n * In a reference (full), after `]`.\n *\n * ```markdown\n * > | [a][b] d\n * ^\n * ```\n *\n * @type {State}\n */\n function referenceFullAfter(code) {\n return self.parser.defined.includes(\n normalizeIdentifier(\n self.sliceSerialize(self.events[self.events.length - 1][1]).slice(1, -1)\n )\n )\n ? ok(code)\n : nok(code)\n }\n\n /**\n * In reference (full) that was missing.\n *\n * ```markdown\n * > | [a][b d\n * ^\n * ```\n *\n * @type {State}\n */\n function referenceFullMissing(code) {\n return nok(code)\n }\n}\n\n/**\n * @this {TokenizeContext}\n * @type {Tokenizer}\n */\nfunction tokenizeReferenceCollapsed(effects, ok, nok) {\n return referenceCollapsedStart\n\n /**\n * In reference (collapsed), at `[`.\n *\n * > 👉 **Note**: we only get here if the label is defined.\n *\n * ```markdown\n * > | [a][] d\n * ^\n * ```\n *\n * @type {State}\n */\n function referenceCollapsedStart(code) {\n // We only attempt a collapsed label if there’s a `[`.\n\n effects.enter('reference')\n effects.enter('referenceMarker')\n effects.consume(code)\n effects.exit('referenceMarker')\n return referenceCollapsedOpen\n }\n\n /**\n * In reference (collapsed), at `]`.\n *\n * > 👉 **Note**: we only get here if the label is defined.\n *\n * ```markdown\n * > | [a][] d\n * ^\n * ```\n *\n * @type {State}\n */\n function referenceCollapsedOpen(code) {\n if (code === 93) {\n effects.enter('referenceMarker')\n effects.consume(code)\n effects.exit('referenceMarker')\n effects.exit('reference')\n return ok\n }\n return nok(code)\n }\n}\n","/**\n * @typedef {import('micromark-util-types').Construct} Construct\n * @typedef {import('micromark-util-types').State} State\n * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext\n * @typedef {import('micromark-util-types').Tokenizer} Tokenizer\n */\n\nimport {labelEnd} from './label-end.js'\n\n/** @type {Construct} */\nexport const labelStartImage = {\n name: 'labelStartImage',\n tokenize: tokenizeLabelStartImage,\n resolveAll: labelEnd.resolveAll\n}\n\n/**\n * @this {TokenizeContext}\n * @type {Tokenizer}\n */\nfunction tokenizeLabelStartImage(effects, ok, nok) {\n const self = this\n return start\n\n /**\n * Start of label (image) start.\n *\n * ```markdown\n * > | a ![b] c\n * ^\n * ```\n *\n * @type {State}\n */\n function start(code) {\n effects.enter('labelImage')\n effects.enter('labelImageMarker')\n effects.consume(code)\n effects.exit('labelImageMarker')\n return open\n }\n\n /**\n * After `!`, at `[`.\n *\n * ```markdown\n * > | a ![b] c\n * ^\n * ```\n *\n * @type {State}\n */\n function open(code) {\n if (code === 91) {\n effects.enter('labelMarker')\n effects.consume(code)\n effects.exit('labelMarker')\n effects.exit('labelImage')\n return after\n }\n return nok(code)\n }\n\n /**\n * After `![`.\n *\n * ```markdown\n * > | a ![b] c\n * ^\n * ```\n *\n * This is needed in because, when GFM footnotes are enabled, images never\n * form when started with a `^`.\n * Instead, links form:\n *\n * ```markdown\n * \n *\n * ![^a][b]\n *\n * [b]: c\n * ```\n *\n * ```html\n * !^a
\n * !^a
\n * ```\n *\n * @type {State}\n */\n function after(code) {\n // To do: use a new field to do this, this is still needed for\n // `micromark-extension-gfm-footnote`, but the `label-start-link`\n // behavior isn’t.\n // Hidden footnotes hook.\n /* c8 ignore next 3 */\n return code === 94 && '_hiddenFootnoteSupport' in self.parser.constructs\n ? nok(code)\n : ok(code)\n }\n}\n","/**\n * @typedef {import('micromark-util-types').Code} Code\n */\n\nimport {\n markdownLineEndingOrSpace,\n unicodePunctuation,\n unicodeWhitespace\n} from 'micromark-util-character'\n/**\n * Classify whether a code represents whitespace, punctuation, or something\n * else.\n *\n * Used for attention (emphasis, strong), whose sequences can open or close\n * based on the class of surrounding characters.\n *\n * > 👉 **Note**: eof (`null`) is seen as whitespace.\n *\n * @param {Code} code\n * Code.\n * @returns {typeof constants.characterGroupWhitespace | typeof constants.characterGroupPunctuation | undefined}\n * Group.\n */\nexport function classifyCharacter(code) {\n if (\n code === null ||\n markdownLineEndingOrSpace(code) ||\n unicodeWhitespace(code)\n ) {\n return 1\n }\n if (unicodePunctuation(code)) {\n return 2\n }\n}\n","/**\n * @typedef {import('micromark-util-types').Code} Code\n * @typedef {import('micromark-util-types').Construct} Construct\n * @typedef {import('micromark-util-types').Event} Event\n * @typedef {import('micromark-util-types').Point} Point\n * @typedef {import('micromark-util-types').Resolver} Resolver\n * @typedef {import('micromark-util-types').State} State\n * @typedef {import('micromark-util-types').Token} Token\n * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext\n * @typedef {import('micromark-util-types').Tokenizer} Tokenizer\n */\n\nimport {push, splice} from 'micromark-util-chunked'\nimport {classifyCharacter} from 'micromark-util-classify-character'\nimport {resolveAll} from 'micromark-util-resolve-all'\n/** @type {Construct} */\nexport const attention = {\n name: 'attention',\n tokenize: tokenizeAttention,\n resolveAll: resolveAllAttention\n}\n\n/**\n * Take all events and resolve attention to emphasis or strong.\n *\n * @type {Resolver}\n */\n// eslint-disable-next-line complexity\nfunction resolveAllAttention(events, context) {\n let index = -1\n /** @type {number} */\n let open\n /** @type {Token} */\n let group\n /** @type {Token} */\n let text\n /** @type {Token} */\n let openingSequence\n /** @type {Token} */\n let closingSequence\n /** @type {number} */\n let use\n /** @type {Array} */\n let nextEvents\n /** @type {number} */\n let offset\n\n // Walk through all events.\n //\n // Note: performance of this is fine on an mb of normal markdown, but it’s\n // a bottleneck for malicious stuff.\n while (++index < events.length) {\n // Find a token that can close.\n if (\n events[index][0] === 'enter' &&\n events[index][1].type === 'attentionSequence' &&\n events[index][1]._close\n ) {\n open = index\n\n // Now walk back to find an opener.\n while (open--) {\n // Find a token that can open the closer.\n if (\n events[open][0] === 'exit' &&\n events[open][1].type === 'attentionSequence' &&\n events[open][1]._open &&\n // If the markers are the same:\n context.sliceSerialize(events[open][1]).charCodeAt(0) ===\n context.sliceSerialize(events[index][1]).charCodeAt(0)\n ) {\n // If the opening can close or the closing can open,\n // and the close size *is not* a multiple of three,\n // but the sum of the opening and closing size *is* multiple of three,\n // then don’t match.\n if (\n (events[open][1]._close || events[index][1]._open) &&\n (events[index][1].end.offset - events[index][1].start.offset) % 3 &&\n !(\n (events[open][1].end.offset -\n events[open][1].start.offset +\n events[index][1].end.offset -\n events[index][1].start.offset) %\n 3\n )\n ) {\n continue\n }\n\n // Number of markers to use from the sequence.\n use =\n events[open][1].end.offset - events[open][1].start.offset > 1 &&\n events[index][1].end.offset - events[index][1].start.offset > 1\n ? 2\n : 1\n const start = Object.assign({}, events[open][1].end)\n const end = Object.assign({}, events[index][1].start)\n movePoint(start, -use)\n movePoint(end, use)\n openingSequence = {\n type: use > 1 ? 'strongSequence' : 'emphasisSequence',\n start,\n end: Object.assign({}, events[open][1].end)\n }\n closingSequence = {\n type: use > 1 ? 'strongSequence' : 'emphasisSequence',\n start: Object.assign({}, events[index][1].start),\n end\n }\n text = {\n type: use > 1 ? 'strongText' : 'emphasisText',\n start: Object.assign({}, events[open][1].end),\n end: Object.assign({}, events[index][1].start)\n }\n group = {\n type: use > 1 ? 'strong' : 'emphasis',\n start: Object.assign({}, openingSequence.start),\n end: Object.assign({}, closingSequence.end)\n }\n events[open][1].end = Object.assign({}, openingSequence.start)\n events[index][1].start = Object.assign({}, closingSequence.end)\n nextEvents = []\n\n // If there are more markers in the opening, add them before.\n if (events[open][1].end.offset - events[open][1].start.offset) {\n nextEvents = push(nextEvents, [\n ['enter', events[open][1], context],\n ['exit', events[open][1], context]\n ])\n }\n\n // Opening.\n nextEvents = push(nextEvents, [\n ['enter', group, context],\n ['enter', openingSequence, context],\n ['exit', openingSequence, context],\n ['enter', text, context]\n ])\n\n // Always populated by defaults.\n\n // Between.\n nextEvents = push(\n nextEvents,\n resolveAll(\n context.parser.constructs.insideSpan.null,\n events.slice(open + 1, index),\n context\n )\n )\n\n // Closing.\n nextEvents = push(nextEvents, [\n ['exit', text, context],\n ['enter', closingSequence, context],\n ['exit', closingSequence, context],\n ['exit', group, context]\n ])\n\n // If there are more markers in the closing, add them after.\n if (events[index][1].end.offset - events[index][1].start.offset) {\n offset = 2\n nextEvents = push(nextEvents, [\n ['enter', events[index][1], context],\n ['exit', events[index][1], context]\n ])\n } else {\n offset = 0\n }\n splice(events, open - 1, index - open + 3, nextEvents)\n index = open + nextEvents.length - offset - 2\n break\n }\n }\n }\n }\n\n // Remove remaining sequences.\n index = -1\n while (++index < events.length) {\n if (events[index][1].type === 'attentionSequence') {\n events[index][1].type = 'data'\n }\n }\n return events\n}\n\n/**\n * @this {TokenizeContext}\n * @type {Tokenizer}\n */\nfunction tokenizeAttention(effects, ok) {\n const attentionMarkers = this.parser.constructs.attentionMarkers.null\n const previous = this.previous\n const before = classifyCharacter(previous)\n\n /** @type {NonNullable} */\n let marker\n return start\n\n /**\n * Before a sequence.\n *\n * ```markdown\n * > | **\n * ^\n * ```\n *\n * @type {State}\n */\n function start(code) {\n marker = code\n effects.enter('attentionSequence')\n return inside(code)\n }\n\n /**\n * In a sequence.\n *\n * ```markdown\n * > | **\n * ^^\n * ```\n *\n * @type {State}\n */\n function inside(code) {\n if (code === marker) {\n effects.consume(code)\n return inside\n }\n const token = effects.exit('attentionSequence')\n\n // To do: next major: move this to resolver, just like `markdown-rs`.\n const after = classifyCharacter(code)\n\n // Always populated by defaults.\n\n const open =\n !after || (after === 2 && before) || attentionMarkers.includes(code)\n const close =\n !before || (before === 2 && after) || attentionMarkers.includes(previous)\n token._open = Boolean(marker === 42 ? open : open && (before || !close))\n token._close = Boolean(marker === 42 ? close : close && (after || !open))\n return ok(code)\n }\n}\n\n/**\n * Move a point a bit.\n *\n * Note: `move` only works inside lines! It’s not possible to move past other\n * chunks (replacement characters, tabs, or line endings).\n *\n * @param {Point} point\n * @param {number} offset\n * @returns {undefined}\n */\nfunction movePoint(point, offset) {\n point.column += offset\n point.offset += offset\n point._bufferIndex += offset\n}\n","/**\n * @typedef {import('micromark-util-types').Construct} Construct\n * @typedef {import('micromark-util-types').State} State\n * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext\n * @typedef {import('micromark-util-types').Tokenizer} Tokenizer\n */\n\nimport {\n asciiAlpha,\n asciiAlphanumeric,\n asciiAtext,\n asciiControl\n} from 'micromark-util-character'\n/** @type {Construct} */\nexport const autolink = {\n name: 'autolink',\n tokenize: tokenizeAutolink\n}\n\n/**\n * @this {TokenizeContext}\n * @type {Tokenizer}\n */\nfunction tokenizeAutolink(effects, ok, nok) {\n let size = 0\n return start\n\n /**\n * Start of an autolink.\n *\n * ```markdown\n * > | ab\n * ^\n * > | ab\n * ^\n * ```\n *\n * @type {State}\n */\n function start(code) {\n effects.enter('autolink')\n effects.enter('autolinkMarker')\n effects.consume(code)\n effects.exit('autolinkMarker')\n effects.enter('autolinkProtocol')\n return open\n }\n\n /**\n * After `<`, at protocol or atext.\n *\n * ```markdown\n * > | ab\n * ^\n * > | ab\n * ^\n * ```\n *\n * @type {State}\n */\n function open(code) {\n if (asciiAlpha(code)) {\n effects.consume(code)\n return schemeOrEmailAtext\n }\n return emailAtext(code)\n }\n\n /**\n * At second byte of protocol or atext.\n *\n * ```markdown\n * > | ab\n * ^\n * > | a