InlineLexer.prototype.output = function()

in src/vs/base/common/marked/marked.js [682:860]

• 150 lines of code
• 48 McCabe index (conditional complexity)

InlineLexer.prototype.output = function(src) {
  var out = '',
      link,
      text,
      href,
      title,
      cap,
      prevCapZero;

  while (src) {
    // escape
    if (cap = this.rules.escape.exec(src)) {
      src = src.substring(cap[0].length);
      out += escape(cap[1]);
      continue;
    }

    // tag
    if (cap = this.rules.tag.exec(src)) {
      if (!this.inLink && /^<a /i.test(cap[0])) {
        this.inLink = true;
      } else if (this.inLink && /^<\/a>/i.test(cap[0])) {
        this.inLink = false;
      }
      if (!this.inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
        this.inRawBlock = true;
      } else if (this.inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
        this.inRawBlock = false;
      }

      src = src.substring(cap[0].length);
      out += this.options.sanitize
        ? this.options.sanitizer
          ? this.options.sanitizer(cap[0])
          : escape(cap[0])
        : cap[0];
      continue;
    }

    // link
    if (cap = this.rules.link.exec(src)) {
      var lastParenIndex = findClosingBracket(cap[2], '()');
      if (lastParenIndex > -1) {
        var linkLen = cap[0].length - (cap[2].length - lastParenIndex) - (cap[3] || '').length;
        cap[2] = cap[2].substring(0, lastParenIndex);
        cap[0] = cap[0].substring(0, linkLen).trim();
        cap[3] = '';
      }
      src = src.substring(cap[0].length);
      this.inLink = true;
      href = cap[2];
      if (this.options.pedantic) {
        link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);

        if (link) {
          href = link[1];
          title = link[3];
        } else {
          title = '';
        }
      } else {
        title = cap[3] ? cap[3].slice(1, -1) : '';
      }
      href = href.trim().replace(/^<([\s\S]*)>$/, '$1');
      out += this.outputLink(cap, {
        href: InlineLexer.escapes(href),
        title: InlineLexer.escapes(title)
      });
      this.inLink = false;
      continue;
    }

    // reflink, nolink
    if ((cap = this.rules.reflink.exec(src))
        || (cap = this.rules.nolink.exec(src))) {
      src = src.substring(cap[0].length);
      link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
      link = this.links[link.toLowerCase()];
      if (!link || !link.href) {
        out += cap[0].charAt(0);
        src = cap[0].substring(1) + src;
        continue;
      }
      this.inLink = true;
      out += this.outputLink(cap, link);
      this.inLink = false;
      continue;
    }

    // strong
    if (cap = this.rules.strong.exec(src)) {
      src = src.substring(cap[0].length);
      out += this.renderer.strong(this.output(cap[4] || cap[3] || cap[2] || cap[1]));
      continue;
    }

    // em
    if (cap = this.rules.em.exec(src)) {
      src = src.substring(cap[0].length);
      out += this.renderer.em(this.output(cap[6] || cap[5] || cap[4] || cap[3] || cap[2] || cap[1]));
      continue;
    }

    // code
    if (cap = this.rules.code.exec(src)) {
      src = src.substring(cap[0].length);
      out += this.renderer.codespan(escape(cap[2].trim(), true));
      continue;
    }

    // br
    if (cap = this.rules.br.exec(src)) {
      src = src.substring(cap[0].length);
      out += this.renderer.br();
      continue;
    }

    // del (gfm)
    if (cap = this.rules.del.exec(src)) {
      src = src.substring(cap[0].length);
      out += this.renderer.del(this.output(cap[1]));
      continue;
    }

    // autolink
    if (cap = this.rules.autolink.exec(src)) {
      src = src.substring(cap[0].length);
      if (cap[2] === '@') {
        text = escape(this.mangle(cap[1]));
        href = 'mailto:' + text;
      } else {
        text = escape(cap[1]);
        href = text;
      }
      out += this.renderer.link(href, null, text);
      continue;
    }

    // url (gfm)
    if (!this.inLink && (cap = this.rules.url.exec(src))) {
      if (cap[2] === '@') {
        text = escape(cap[0]);
        href = 'mailto:' + text;
      } else {
        // do extended autolink path validation
        do {
          prevCapZero = cap[0];
          cap[0] = this.rules._backpedal.exec(cap[0])[0];
        } while (prevCapZero !== cap[0]);
        text = escape(cap[0]);
        if (cap[1] === 'www.') {
          href = 'http://' + text;
        } else {
          href = text;
        }
      }
      src = src.substring(cap[0].length);
      out += this.renderer.link(href, null, text);
      continue;
    }

    // text
    if (cap = this.rules.text.exec(src)) {
      src = src.substring(cap[0].length);
      if (this.inRawBlock) {
        out += this.renderer.text(cap[0]);
      } else {
        out += this.renderer.text(escape(this.smartypants(cap[0])));
      }
      continue;
    }

    if (src) {
      throw new Error('Infinite loop on byte: ' + src.charCodeAt(0));
    }
  }

  return out;
};