forked from lix-project/lix-website
824 lines
21 KiB
JavaScript
824 lines
21 KiB
JavaScript
'use strict'
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module.exports = fromMarkdown
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// These three are compiled away in the `dist/`
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var toString = require('mdast-util-to-string')
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var assign = require('micromark/dist/constant/assign')
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var own = require('micromark/dist/constant/has-own-property')
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var normalizeIdentifier = require('micromark/dist/util/normalize-identifier')
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var safeFromInt = require('micromark/dist/util/safe-from-int')
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var parser = require('micromark/dist/parse')
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var preprocessor = require('micromark/dist/preprocess')
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var postprocess = require('micromark/dist/postprocess')
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var decode = require('parse-entities/decode-entity')
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var stringifyPosition = require('unist-util-stringify-position')
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function fromMarkdown(value, encoding, options) {
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if (typeof encoding !== 'string') {
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options = encoding
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encoding = undefined
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}
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return compiler(options)(
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postprocess(
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parser(options).document().write(preprocessor()(value, encoding, true))
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)
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)
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}
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// Note this compiler only understand complete buffering, not streaming.
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function compiler(options) {
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var settings = options || {}
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var config = configure(
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{
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transforms: [],
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canContainEols: [
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'emphasis',
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'fragment',
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'heading',
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'paragraph',
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'strong'
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],
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enter: {
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autolink: opener(link),
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autolinkProtocol: onenterdata,
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autolinkEmail: onenterdata,
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atxHeading: opener(heading),
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blockQuote: opener(blockQuote),
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characterEscape: onenterdata,
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characterReference: onenterdata,
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codeFenced: opener(codeFlow),
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codeFencedFenceInfo: buffer,
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codeFencedFenceMeta: buffer,
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codeIndented: opener(codeFlow, buffer),
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codeText: opener(codeText, buffer),
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codeTextData: onenterdata,
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data: onenterdata,
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codeFlowValue: onenterdata,
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definition: opener(definition),
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definitionDestinationString: buffer,
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definitionLabelString: buffer,
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definitionTitleString: buffer,
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emphasis: opener(emphasis),
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hardBreakEscape: opener(hardBreak),
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hardBreakTrailing: opener(hardBreak),
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htmlFlow: opener(html, buffer),
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htmlFlowData: onenterdata,
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htmlText: opener(html, buffer),
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htmlTextData: onenterdata,
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image: opener(image),
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label: buffer,
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link: opener(link),
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listItem: opener(listItem),
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listItemValue: onenterlistitemvalue,
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listOrdered: opener(list, onenterlistordered),
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listUnordered: opener(list),
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paragraph: opener(paragraph),
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reference: onenterreference,
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referenceString: buffer,
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resourceDestinationString: buffer,
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resourceTitleString: buffer,
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setextHeading: opener(heading),
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strong: opener(strong),
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thematicBreak: opener(thematicBreak)
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},
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exit: {
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atxHeading: closer(),
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atxHeadingSequence: onexitatxheadingsequence,
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autolink: closer(),
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autolinkEmail: onexitautolinkemail,
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autolinkProtocol: onexitautolinkprotocol,
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blockQuote: closer(),
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characterEscapeValue: onexitdata,
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characterReferenceMarkerHexadecimal: onexitcharacterreferencemarker,
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characterReferenceMarkerNumeric: onexitcharacterreferencemarker,
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characterReferenceValue: onexitcharacterreferencevalue,
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codeFenced: closer(onexitcodefenced),
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codeFencedFence: onexitcodefencedfence,
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codeFencedFenceInfo: onexitcodefencedfenceinfo,
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codeFencedFenceMeta: onexitcodefencedfencemeta,
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codeFlowValue: onexitdata,
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codeIndented: closer(onexitcodeindented),
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codeText: closer(onexitcodetext),
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codeTextData: onexitdata,
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data: onexitdata,
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definition: closer(),
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definitionDestinationString: onexitdefinitiondestinationstring,
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definitionLabelString: onexitdefinitionlabelstring,
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definitionTitleString: onexitdefinitiontitlestring,
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emphasis: closer(),
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hardBreakEscape: closer(onexithardbreak),
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hardBreakTrailing: closer(onexithardbreak),
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htmlFlow: closer(onexithtmlflow),
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htmlFlowData: onexitdata,
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htmlText: closer(onexithtmltext),
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htmlTextData: onexitdata,
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image: closer(onexitimage),
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label: onexitlabel,
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labelText: onexitlabeltext,
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lineEnding: onexitlineending,
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link: closer(onexitlink),
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listItem: closer(),
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listOrdered: closer(),
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listUnordered: closer(),
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paragraph: closer(),
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referenceString: onexitreferencestring,
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resourceDestinationString: onexitresourcedestinationstring,
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resourceTitleString: onexitresourcetitlestring,
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resource: onexitresource,
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setextHeading: closer(onexitsetextheading),
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setextHeadingLineSequence: onexitsetextheadinglinesequence,
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setextHeadingText: onexitsetextheadingtext,
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strong: closer(),
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thematicBreak: closer()
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}
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},
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settings.mdastExtensions || []
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)
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var data = {}
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return compile
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function compile(events) {
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var tree = {type: 'root', children: []}
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var stack = [tree]
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var tokenStack = []
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var listStack = []
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var index = -1
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var handler
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var listStart
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var context = {
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stack: stack,
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tokenStack: tokenStack,
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config: config,
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enter: enter,
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exit: exit,
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buffer: buffer,
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resume: resume,
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setData: setData,
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getData: getData
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}
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while (++index < events.length) {
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// We preprocess lists to add `listItem` tokens, and to infer whether
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// items the list itself are spread out.
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if (
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events[index][1].type === 'listOrdered' ||
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events[index][1].type === 'listUnordered'
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) {
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if (events[index][0] === 'enter') {
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listStack.push(index)
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} else {
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listStart = listStack.pop(index)
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index = prepareList(events, listStart, index)
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}
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}
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}
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index = -1
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while (++index < events.length) {
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handler = config[events[index][0]]
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if (own.call(handler, events[index][1].type)) {
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handler[events[index][1].type].call(
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assign({sliceSerialize: events[index][2].sliceSerialize}, context),
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events[index][1]
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)
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}
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}
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if (tokenStack.length) {
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throw new Error(
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'Cannot close document, a token (`' +
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tokenStack[tokenStack.length - 1].type +
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'`, ' +
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stringifyPosition({
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start: tokenStack[tokenStack.length - 1].start,
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end: tokenStack[tokenStack.length - 1].end
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}) +
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') is still open'
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)
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}
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// Figure out `root` position.
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tree.position = {
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start: point(
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events.length ? events[0][1].start : {line: 1, column: 1, offset: 0}
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),
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end: point(
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events.length
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? events[events.length - 2][1].end
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: {line: 1, column: 1, offset: 0}
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)
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}
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index = -1
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while (++index < config.transforms.length) {
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tree = config.transforms[index](tree) || tree
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}
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return tree
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}
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function prepareList(events, start, length) {
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var index = start - 1
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var containerBalance = -1
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var listSpread = false
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var listItem
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var tailIndex
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var lineIndex
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var tailEvent
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var event
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var firstBlankLineIndex
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var atMarker
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while (++index <= length) {
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event = events[index]
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if (
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event[1].type === 'listUnordered' ||
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event[1].type === 'listOrdered' ||
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event[1].type === 'blockQuote'
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) {
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if (event[0] === 'enter') {
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containerBalance++
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} else {
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containerBalance--
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}
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atMarker = undefined
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} else if (event[1].type === 'lineEndingBlank') {
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if (event[0] === 'enter') {
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if (
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listItem &&
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!atMarker &&
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!containerBalance &&
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!firstBlankLineIndex
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) {
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firstBlankLineIndex = index
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}
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atMarker = undefined
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}
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} else if (
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event[1].type === 'linePrefix' ||
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event[1].type === 'listItemValue' ||
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event[1].type === 'listItemMarker' ||
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event[1].type === 'listItemPrefix' ||
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event[1].type === 'listItemPrefixWhitespace'
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) {
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// Empty.
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} else {
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atMarker = undefined
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}
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if (
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(!containerBalance &&
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event[0] === 'enter' &&
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event[1].type === 'listItemPrefix') ||
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(containerBalance === -1 &&
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event[0] === 'exit' &&
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(event[1].type === 'listUnordered' ||
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event[1].type === 'listOrdered'))
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) {
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if (listItem) {
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tailIndex = index
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lineIndex = undefined
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while (tailIndex--) {
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tailEvent = events[tailIndex]
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if (
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tailEvent[1].type === 'lineEnding' ||
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tailEvent[1].type === 'lineEndingBlank'
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) {
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if (tailEvent[0] === 'exit') continue
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if (lineIndex) {
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events[lineIndex][1].type = 'lineEndingBlank'
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listSpread = true
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}
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tailEvent[1].type = 'lineEnding'
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lineIndex = tailIndex
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} else if (
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tailEvent[1].type === 'linePrefix' ||
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tailEvent[1].type === 'blockQuotePrefix' ||
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tailEvent[1].type === 'blockQuotePrefixWhitespace' ||
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tailEvent[1].type === 'blockQuoteMarker' ||
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tailEvent[1].type === 'listItemIndent'
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) {
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// Empty
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} else {
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break
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}
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}
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if (
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firstBlankLineIndex &&
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(!lineIndex || firstBlankLineIndex < lineIndex)
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) {
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listItem._spread = true
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}
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// Fix position.
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listItem.end = point(
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lineIndex ? events[lineIndex][1].start : event[1].end
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)
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events.splice(lineIndex || index, 0, ['exit', listItem, event[2]])
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index++
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length++
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}
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// Create a new list item.
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if (event[1].type === 'listItemPrefix') {
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listItem = {
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type: 'listItem',
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_spread: false,
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start: point(event[1].start)
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}
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events.splice(index, 0, ['enter', listItem, event[2]])
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index++
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length++
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firstBlankLineIndex = undefined
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atMarker = true
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}
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}
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}
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events[start][1]._spread = listSpread
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return length
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}
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function setData(key, value) {
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data[key] = value
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}
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function getData(key) {
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return data[key]
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}
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function point(d) {
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return {line: d.line, column: d.column, offset: d.offset}
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}
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function opener(create, and) {
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return open
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function open(token) {
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enter.call(this, create(token), token)
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if (and) and.call(this, token)
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}
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}
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function buffer() {
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this.stack.push({type: 'fragment', children: []})
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}
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function enter(node, token) {
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this.stack[this.stack.length - 1].children.push(node)
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this.stack.push(node)
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this.tokenStack.push(token)
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node.position = {start: point(token.start)}
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return node
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}
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function closer(and) {
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return close
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function close(token) {
|
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if (and) and.call(this, token)
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exit.call(this, token)
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}
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}
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function exit(token) {
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var node = this.stack.pop()
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||
var open = this.tokenStack.pop()
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||
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if (!open) {
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throw new Error(
|
||
'Cannot close `' +
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token.type +
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'` (' +
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stringifyPosition({start: token.start, end: token.end}) +
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'): it’s not open'
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)
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||
} else if (open.type !== token.type) {
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||
throw new Error(
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||
'Cannot close `' +
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token.type +
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||
'` (' +
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||
stringifyPosition({start: token.start, end: token.end}) +
|
||
'): a different token (`' +
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open.type +
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||
'`, ' +
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stringifyPosition({start: open.start, end: open.end}) +
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') is open'
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)
|
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}
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node.position.end = point(token.end)
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||
return node
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||
}
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function resume() {
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return toString(this.stack.pop())
|
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}
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||
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||
//
|
||
// Handlers.
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||
//
|
||
|
||
function onenterlistordered() {
|
||
setData('expectingFirstListItemValue', true)
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||
}
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||
|
||
function onenterlistitemvalue(token) {
|
||
if (getData('expectingFirstListItemValue')) {
|
||
this.stack[this.stack.length - 2].start = parseInt(
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this.sliceSerialize(token),
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10
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)
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||
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setData('expectingFirstListItemValue')
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||
}
|
||
}
|
||
|
||
function onexitcodefencedfenceinfo() {
|
||
var data = this.resume()
|
||
this.stack[this.stack.length - 1].lang = data
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||
}
|
||
|
||
function onexitcodefencedfencemeta() {
|
||
var data = this.resume()
|
||
this.stack[this.stack.length - 1].meta = data
|
||
}
|
||
|
||
function onexitcodefencedfence() {
|
||
// Exit if this is the closing fence.
|
||
if (getData('flowCodeInside')) return
|
||
this.buffer()
|
||
setData('flowCodeInside', true)
|
||
}
|
||
|
||
function onexitcodefenced() {
|
||
var data = this.resume()
|
||
this.stack[this.stack.length - 1].value = data.replace(
|
||
/^(\r?\n|\r)|(\r?\n|\r)$/g,
|
||
''
|
||
)
|
||
|
||
setData('flowCodeInside')
|
||
}
|
||
|
||
function onexitcodeindented() {
|
||
var data = this.resume()
|
||
this.stack[this.stack.length - 1].value = data
|
||
}
|
||
|
||
function onexitdefinitionlabelstring(token) {
|
||
// Discard label, use the source content instead.
|
||
var label = this.resume()
|
||
this.stack[this.stack.length - 1].label = label
|
||
this.stack[this.stack.length - 1].identifier = normalizeIdentifier(
|
||
this.sliceSerialize(token)
|
||
).toLowerCase()
|
||
}
|
||
|
||
function onexitdefinitiontitlestring() {
|
||
var data = this.resume()
|
||
this.stack[this.stack.length - 1].title = data
|
||
}
|
||
|
||
function onexitdefinitiondestinationstring() {
|
||
var data = this.resume()
|
||
this.stack[this.stack.length - 1].url = data
|
||
}
|
||
|
||
function onexitatxheadingsequence(token) {
|
||
if (!this.stack[this.stack.length - 1].depth) {
|
||
this.stack[this.stack.length - 1].depth = this.sliceSerialize(
|
||
token
|
||
).length
|
||
}
|
||
}
|
||
|
||
function onexitsetextheadingtext() {
|
||
setData('setextHeadingSlurpLineEnding', true)
|
||
}
|
||
|
||
function onexitsetextheadinglinesequence(token) {
|
||
this.stack[this.stack.length - 1].depth =
|
||
this.sliceSerialize(token).charCodeAt(0) === 61 ? 1 : 2
|
||
}
|
||
|
||
function onexitsetextheading() {
|
||
setData('setextHeadingSlurpLineEnding')
|
||
}
|
||
|
||
function onenterdata(token) {
|
||
var siblings = this.stack[this.stack.length - 1].children
|
||
var tail = siblings[siblings.length - 1]
|
||
|
||
if (!tail || tail.type !== 'text') {
|
||
// Add a new text node.
|
||
tail = text()
|
||
tail.position = {start: point(token.start)}
|
||
this.stack[this.stack.length - 1].children.push(tail)
|
||
}
|
||
|
||
this.stack.push(tail)
|
||
}
|
||
|
||
function onexitdata(token) {
|
||
var tail = this.stack.pop()
|
||
tail.value += this.sliceSerialize(token)
|
||
tail.position.end = point(token.end)
|
||
}
|
||
|
||
function onexitlineending(token) {
|
||
var context = this.stack[this.stack.length - 1]
|
||
|
||
// If we’re at a hard break, include the line ending in there.
|
||
if (getData('atHardBreak')) {
|
||
context.children[context.children.length - 1].position.end = point(
|
||
token.end
|
||
)
|
||
|
||
setData('atHardBreak')
|
||
return
|
||
}
|
||
|
||
if (
|
||
!getData('setextHeadingSlurpLineEnding') &&
|
||
config.canContainEols.indexOf(context.type) > -1
|
||
) {
|
||
onenterdata.call(this, token)
|
||
onexitdata.call(this, token)
|
||
}
|
||
}
|
||
|
||
function onexithardbreak() {
|
||
setData('atHardBreak', true)
|
||
}
|
||
|
||
function onexithtmlflow() {
|
||
var data = this.resume()
|
||
this.stack[this.stack.length - 1].value = data
|
||
}
|
||
|
||
function onexithtmltext() {
|
||
var data = this.resume()
|
||
this.stack[this.stack.length - 1].value = data
|
||
}
|
||
|
||
function onexitcodetext() {
|
||
var data = this.resume()
|
||
this.stack[this.stack.length - 1].value = data
|
||
}
|
||
|
||
function onexitlink() {
|
||
var context = this.stack[this.stack.length - 1]
|
||
|
||
// To do: clean.
|
||
if (getData('inReference')) {
|
||
context.type += 'Reference'
|
||
context.referenceType = getData('referenceType') || 'shortcut'
|
||
delete context.url
|
||
delete context.title
|
||
} else {
|
||
delete context.identifier
|
||
delete context.label
|
||
delete context.referenceType
|
||
}
|
||
|
||
setData('referenceType')
|
||
}
|
||
|
||
function onexitimage() {
|
||
var context = this.stack[this.stack.length - 1]
|
||
|
||
// To do: clean.
|
||
if (getData('inReference')) {
|
||
context.type += 'Reference'
|
||
context.referenceType = getData('referenceType') || 'shortcut'
|
||
delete context.url
|
||
delete context.title
|
||
} else {
|
||
delete context.identifier
|
||
delete context.label
|
||
delete context.referenceType
|
||
}
|
||
|
||
setData('referenceType')
|
||
}
|
||
|
||
function onexitlabeltext(token) {
|
||
this.stack[this.stack.length - 2].identifier = normalizeIdentifier(
|
||
this.sliceSerialize(token)
|
||
).toLowerCase()
|
||
}
|
||
|
||
function onexitlabel() {
|
||
var fragment = this.stack[this.stack.length - 1]
|
||
var value = this.resume()
|
||
|
||
this.stack[this.stack.length - 1].label = value
|
||
|
||
// Assume a reference.
|
||
setData('inReference', true)
|
||
|
||
if (this.stack[this.stack.length - 1].type === 'link') {
|
||
this.stack[this.stack.length - 1].children = fragment.children
|
||
} else {
|
||
this.stack[this.stack.length - 1].alt = value
|
||
}
|
||
}
|
||
|
||
function onexitresourcedestinationstring() {
|
||
var data = this.resume()
|
||
this.stack[this.stack.length - 1].url = data
|
||
}
|
||
|
||
function onexitresourcetitlestring() {
|
||
var data = this.resume()
|
||
this.stack[this.stack.length - 1].title = data
|
||
}
|
||
|
||
function onexitresource() {
|
||
setData('inReference')
|
||
}
|
||
|
||
function onenterreference() {
|
||
setData('referenceType', 'collapsed')
|
||
}
|
||
|
||
function onexitreferencestring(token) {
|
||
var label = this.resume()
|
||
this.stack[this.stack.length - 1].label = label
|
||
this.stack[this.stack.length - 1].identifier = normalizeIdentifier(
|
||
this.sliceSerialize(token)
|
||
).toLowerCase()
|
||
setData('referenceType', 'full')
|
||
}
|
||
|
||
function onexitcharacterreferencemarker(token) {
|
||
setData('characterReferenceType', token.type)
|
||
}
|
||
|
||
function onexitcharacterreferencevalue(token) {
|
||
var data = this.sliceSerialize(token)
|
||
var type = getData('characterReferenceType')
|
||
var value
|
||
var tail
|
||
|
||
if (type) {
|
||
value = safeFromInt(
|
||
data,
|
||
type === 'characterReferenceMarkerNumeric' ? 10 : 16
|
||
)
|
||
|
||
setData('characterReferenceType')
|
||
} else {
|
||
value = decode(data)
|
||
}
|
||
|
||
tail = this.stack.pop()
|
||
tail.value += value
|
||
tail.position.end = point(token.end)
|
||
}
|
||
|
||
function onexitautolinkprotocol(token) {
|
||
onexitdata.call(this, token)
|
||
this.stack[this.stack.length - 1].url = this.sliceSerialize(token)
|
||
}
|
||
|
||
function onexitautolinkemail(token) {
|
||
onexitdata.call(this, token)
|
||
this.stack[this.stack.length - 1].url =
|
||
'mailto:' + this.sliceSerialize(token)
|
||
}
|
||
|
||
//
|
||
// Creaters.
|
||
//
|
||
|
||
function blockQuote() {
|
||
return {type: 'blockquote', children: []}
|
||
}
|
||
|
||
function codeFlow() {
|
||
return {type: 'code', lang: null, meta: null, value: ''}
|
||
}
|
||
|
||
function codeText() {
|
||
return {type: 'inlineCode', value: ''}
|
||
}
|
||
|
||
function definition() {
|
||
return {
|
||
type: 'definition',
|
||
identifier: '',
|
||
label: null,
|
||
title: null,
|
||
url: ''
|
||
}
|
||
}
|
||
|
||
function emphasis() {
|
||
return {type: 'emphasis', children: []}
|
||
}
|
||
|
||
function heading() {
|
||
return {type: 'heading', depth: undefined, children: []}
|
||
}
|
||
|
||
function hardBreak() {
|
||
return {type: 'break'}
|
||
}
|
||
|
||
function html() {
|
||
return {type: 'html', value: ''}
|
||
}
|
||
|
||
function image() {
|
||
return {type: 'image', title: null, url: '', alt: null}
|
||
}
|
||
|
||
function link() {
|
||
return {type: 'link', title: null, url: '', children: []}
|
||
}
|
||
|
||
function list(token) {
|
||
return {
|
||
type: 'list',
|
||
ordered: token.type === 'listOrdered',
|
||
start: null,
|
||
spread: token._spread,
|
||
children: []
|
||
}
|
||
}
|
||
|
||
function listItem(token) {
|
||
return {
|
||
type: 'listItem',
|
||
spread: token._spread,
|
||
checked: null,
|
||
children: []
|
||
}
|
||
}
|
||
|
||
function paragraph() {
|
||
return {type: 'paragraph', children: []}
|
||
}
|
||
|
||
function strong() {
|
||
return {type: 'strong', children: []}
|
||
}
|
||
|
||
function text() {
|
||
return {type: 'text', value: ''}
|
||
}
|
||
|
||
function thematicBreak() {
|
||
return {type: 'thematicBreak'}
|
||
}
|
||
}
|
||
|
||
function configure(config, extensions) {
|
||
var index = -1
|
||
|
||
while (++index < extensions.length) {
|
||
extension(config, extensions[index])
|
||
}
|
||
|
||
return config
|
||
}
|
||
|
||
function extension(config, extension) {
|
||
var key
|
||
var left
|
||
|
||
for (key in extension) {
|
||
left = own.call(config, key) ? config[key] : (config[key] = {})
|
||
|
||
if (key === 'canContainEols' || key === 'transforms') {
|
||
config[key] = [].concat(left, extension[key])
|
||
} else {
|
||
Object.assign(left, extension[key])
|
||
}
|
||
}
|
||
}
|