markdown-viewer/background/compilers/showdown.js

md.compilers.showdown = (() => {
  var defaults = null // see below

  var description = {
    disableForced4SpacesIndentedSublists: "Disables the requirement of indenting nested sublists by 4 spaces",
    encodeEmails: "Encode e-mail addresses through the use of Character Entities, transforming ASCII e-mail addresses into its equivalent decimal entities",
    excludeTrailingPunctuationFromURLs: "Excludes trailing punctuation from links generated with autoLinking",
    ghCodeBlocks: "Turn on/off GFM fenced code blocks support",
    ghCompatibleHeaderId: "Generate header ids compatible with github style (spaces are replaced with dashes, a bunch of non alphanumeric chars are removed)",
    ghMentions: "Enables github @mentions",
    literalMidWordUnderscores: "Parse midword underscores as literal underscores",
    noHeaderId: "Turn on/off generated header id",
    omitExtraWLInCodeBlocks: "Omit the default extra whiteline added to code blocks",
    parseImgDimensions: "Turn on/off image dimension parsing",
    prefixHeaderId: "Specify a prefix to generated header ids",
    requireSpaceBeforeHeadingText: "Makes adding a space between `#` and the header text mandatory (GFM Style)",
    simpleLineBreaks: "Parses simple line breaks as <br> (GFM Style)",
    simplifiedAutoLink: "Turn on/off GFM autolink style",
    smartIndentationFix: "Tries to smartly fix indentation in es6 strings",
    smoothLivePreview: "Prevents weird effects in live previews due to incomplete input",
    strikethrough: "Turn on/off strikethrough support",
    tables: "Turn on/off tables support",
    tablesHeaderId: "Add an id to table headers",
    tasklists: "Turn on/off GFM tasklist support",
    customizedHeaderId: "Use text in curly braces as header id",
    rawPrefixHeaderId: "Prevent modifying the prefix",
    rawHeaderId: "Remove only spaces, \' and \" from generated header ids",
    literalMidWordAsterisks: "Stop interpreting asterisks in the middle of words",
    tablesHeaderId: "Adds an id property to table headers tags",
    openLinksInNewWindow: "Open all links in new windows",
    backslashEscapesHTMLTags: "Support for HTML Tag escaping",
  }

  var flavor = (name) => {
    var options = showdown.getDefaultOptions()
    var flavor = showdown.getFlavorOptions(name)
    var result = {}
    for (var key in options) {
      result[key] = (flavor[key] !== undefined) ? flavor[key] : options[key]
    }
    return result
  }

  defaults = flavor('github')

  var ctor = ({storage: {state}}) => ({
    defaults,
    description,
    compile: (markdown) =>
      new showdown.Converter(state.showdown)
        .makeHtml(markdown)
  })

  return Object.assign(ctor, {defaults, description})
})()