discourse/vendor/assets/javascripts/markdown-it.js

/*! markdown-it 8.4.1 https://github.com//markdown-it/markdown-it @license MIT */(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.markdownit = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
// HTML5 entities map: { name -> utf16string }
//
'use strict';

/*eslint quotes:0*/
module.exports = require('entities/maps/entities.json');

},{"entities/maps/entities.json":52}],2:[function(require,module,exports){
// List of valid html blocks names, accorting to commonmark spec
// http://jgm.github.io/CommonMark/spec.html#html-blocks

'use strict';


module.exports = [
  'address',
  'article',
  'aside',
  'base',
  'basefont',
  'blockquote',
  'body',
  'caption',
  'center',
  'col',
  'colgroup',
  'dd',
  'details',
  'dialog',
  'dir',
  'div',
  'dl',
  'dt',
  'fieldset',
  'figcaption',
  'figure',
  'footer',
  'form',
  'frame',
  'frameset',
  'h1',
  'h2',
  'h3',
  'h4',
  'h5',
  'h6',
  'head',
  'header',
  'hr',
  'html',
  'iframe',
  'legend',
  'li',
  'link',
  'main',
  'menu',
  'menuitem',
  'meta',
  'nav',
  'noframes',
  'ol',
  'optgroup',
  'option',
  'p',
  'param',
  'section',
  'source',
  'summary',
  'table',
  'tbody',
  'td',
  'tfoot',
  'th',
  'thead',
  'title',
  'tr',
  'track',
  'ul'
];

},{}],3:[function(require,module,exports){
// Regexps to match html elements

'use strict';

var attr_name     = '[a-zA-Z_:][a-zA-Z0-9:._-]*';

var unquoted      = '[^"\'=<>`\\x00-\\x20]+';
var single_quoted = "'[^']*'";
var double_quoted = '"[^"]*"';

var attr_value  = '(?:' + unquoted + '|' + single_quoted + '|' + double_quoted + ')';

var attribute   = '(?:\\s+' + attr_name + '(?:\\s*=\\s*' + attr_value + ')?)';

var open_tag    = '<[A-Za-z][A-Za-z0-9\\-]*' + attribute + '*\\s*\\/?>';

var close_tag   = '<\\/[A-Za-z][A-Za-z0-9\\-]*\\s*>';
var comment     = '<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->';
var processing  = '<[?].*?[?]>';
var declaration = '<![A-Z]+\\s+[^>]*>';
var cdata       = '<!\\[CDATA\\[[\\s\\S]*?\\]\\]>';

var HTML_TAG_RE = new RegExp('^(?:' + open_tag + '|' + close_tag + '|' + comment +
                        '|' + processing + '|' + declaration + '|' + cdata + ')');
var HTML_OPEN_CLOSE_TAG_RE = new RegExp('^(?:' + open_tag + '|' + close_tag + ')');

module.exports.HTML_TAG_RE = HTML_TAG_RE;
module.exports.HTML_OPEN_CLOSE_TAG_RE = HTML_OPEN_CLOSE_TAG_RE;

},{}],4:[function(require,module,exports){
// Utilities
//
'use strict';


function _class(obj) { return Object.prototype.toString.call(obj); }

function isString(obj) { return _class(obj) === '[object String]'; }

var _hasOwnProperty = Object.prototype.hasOwnProperty;

function has(object, key) {
  return _hasOwnProperty.call(object, key);
}

// Merge objects
//
function assign(obj /*from1, from2, from3, ...*/) {
  var sources = Array.prototype.slice.call(arguments, 1);

  sources.forEach(function (source) {
    if (!source) { return; }

    if (typeof source !== 'object') {
      throw new TypeError(source + 'must be object');
    }

    Object.keys(source).forEach(function (key) {
      obj[key] = source[key];
    });
  });

  return obj;
}

// Remove element from array and put another array at those position.
// Useful for some operations with tokens
function arrayReplaceAt(src, pos, newElements) {
  return [].concat(src.slice(0, pos), newElements, src.slice(pos + 1));
}

////////////////////////////////////////////////////////////////////////////////

function isValidEntityCode(c) {
  /*eslint no-bitwise:0*/
  // broken sequence
  if (c >= 0xD800 && c <= 0xDFFF) { return false; }
  // never used
  if (c >= 0xFDD0 && c <= 0xFDEF) { return false; }
  if ((c & 0xFFFF) === 0xFFFF || (c & 0xFFFF) === 0xFFFE) { return false; }
  // control codes
  if (c >= 0x00 && c <= 0x08) { return false; }
  if (c === 0x0B) { return false; }
  if (c >= 0x0E && c <= 0x1F) { return false; }
  if (c >= 0x7F && c <= 0x9F) { return false; }
  // out of range
  if (c > 0x10FFFF) { return false; }
  return true;
}

function fromCodePoint(c) {
  /*eslint no-bitwise:0*/
  if (c > 0xffff) {
    c -= 0x10000;
    var surrogate1 = 0xd800 + (c >> 10),
        surrogate2 = 0xdc00 + (c & 0x3ff);

    return String.fromCharCode(surrogate1, surrogate2);
  }
  return String.fromCharCode(c);
}


var UNESCAPE_MD_RE  = /\\([!"#$%&'()*+,\-.\/:;<=>?@[\\\]^_`{|}~])/g;
var ENTITY_RE       = /&([a-z#][a-z0-9]{1,31});/gi;
var UNESCAPE_ALL_RE = new RegExp(UNESCAPE_MD_RE.source + '|' + ENTITY_RE.source, 'gi');

var DIGITAL_ENTITY_TEST_RE = /^#((?:x[a-f0-9]{1,8}|[0-9]{1,8}))/i;

var entities = require('./entities');

function replaceEntityPattern(match, name) {
  var code = 0;

  if (has(entities, name)) {
    return entities[name];
  }

  if (name.charCodeAt(0) === 0x23/* # */ && DIGITAL_ENTITY_TEST_RE.test(name)) {
    code = name[1].toLowerCase() === 'x' ?
      parseInt(name.slice(2), 16)
    :
      parseInt(name.slice(1), 10);
    if (isValidEntityCode(code)) {
      return fromCodePoint(code);
    }
  }

  return match;
}

/*function replaceEntities(str) {
  if (str.indexOf('&') < 0) { return str; }

  return str.replace(ENTITY_RE, replaceEntityPattern);
}*/

function unescapeMd(str) {
  if (str.indexOf('\\') < 0) { return str; }
  return str.replace(UNESCAPE_MD_RE, '$1');
}

function unescapeAll(str) {
  if (str.indexOf('\\') < 0 && str.indexOf('&') < 0) { return str; }

  return str.replace(UNESCAPE_ALL_RE, function (match, escaped, entity) {
    if (escaped) { return escaped; }
    return replaceEntityPattern(match, entity);
  });
}

////////////////////////////////////////////////////////////////////////////////

var HTML_ESCAPE_TEST_RE = /[&<>"]/;
var HTML_ESCAPE_REPLACE_RE = /[&<>"]/g;
var HTML_REPLACEMENTS = {
  '&': '&amp;',
  '<': '&lt;',
  '>': '&gt;',
  '"': '&quot;'
};

function replaceUnsafeChar(ch) {
  return HTML_REPLACEMENTS[ch];
}

function escapeHtml(str) {
  if (HTML_ESCAPE_TEST_RE.test(str)) {
    return str.replace(HTML_ESCAPE_REPLACE_RE, replaceUnsafeChar);
  }
  return str;
}

////////////////////////////////////////////////////////////////////////////////

var REGEXP_ESCAPE_RE = /[.?*+^$[\]\\(){}|-]/g;

function escapeRE(str) {
  return str.replace(REGEXP_ESCAPE_RE, '\\$&');
}

////////////////////////////////////////////////////////////////////////////////

function isSpace(code) {
  switch (code) {
    case 0x09:
    case 0x20:
      return true;
  }
  return false;
}

// Zs (unicode class) || [\t\f\v\r\n]
function isWhiteSpace(code) {
  if (code >= 0x2000 && code <= 0x200A) { return true; }
  switch (code) {
    case 0x09: // \t
    case 0x0A: // \n
    case 0x0B: // \v
    case 0x0C: // \f
    case 0x0D: // \r
    case 0x20:
    case 0xA0:
    case 0x1680:
    case 0x202F:
    case 0x205F:
    case 0x3000:
      return true;
  }
  return false;
}

////////////////////////////////////////////////////////////////////////////////

/*eslint-disable max-len*/
var UNICODE_PUNCT_RE = require('uc.micro/categories/P/regex');

// Currently without astral characters support.
function isPunctChar(ch) {
  return UNICODE_PUNCT_RE.test(ch);
}


// Markdown ASCII punctuation characters.
//
// !, ", #, $, %, &, ', (, ), *, +, ,, -, ., /, :, ;, <, =, >, ?, @, [, \, ], ^, _, `, {, |, }, or ~
// http://spec.commonmark.org/0.15/#ascii-punctuation-character
//
// Don't confuse with unicode punctuation !!! It lacks some chars in ascii range.
//
function isMdAsciiPunct(ch) {
  switch (ch) {
    case 0x21/* ! */:
    case 0x22/* " */:
    case 0x23/* # */:
    case 0x24/* $ */:
    case 0x25/* % */:
    case 0x26/* & */:
    case 0x27/* ' */:
    case 0x28/* ( */:
    case 0x29/* ) */:
    case 0x2A/* * */:
    case 0x2B/* + */:
    case 0x2C/* , */:
    case 0x2D/* - */:
    case 0x2E/* . */:
    case 0x2F/* / */:
    case 0x3A/* : */:
    case 0x3B/* ; */:
    case 0x3C/* < */:
    case 0x3D/* = */:
    case 0x3E/* > */:
    case 0x3F/* ? */:
    case 0x40/* @ */:
    case 0x5B/* [ */:
    case 0x5C/* \ */:
    case 0x5D/* ] */:
    case 0x5E/* ^ */:
    case 0x5F/* _ */:
    case 0x60/* ` */:
    case 0x7B/* { */:
    case 0x7C/* | */:
    case 0x7D/* } */:
    case 0x7E/* ~ */:
      return true;
    default:
      return false;
  }
}

// Hepler to unify [reference labels].
//
function normalizeReference(str) {
  // use .toUpperCase() instead of .toLowerCase()
  // here to avoid a conflict with Object.prototype
  // members (most notably, `__proto__`)
  return str.trim().replace(/\s+/g, ' ').toUpperCase();
}

////////////////////////////////////////////////////////////////////////////////

// Re-export libraries commonly used in both markdown-it and its plugins,
// so plugins won't have to depend on them explicitly, which reduces their
// bundled size (e.g. a browser build).
//
exports.lib                 = {};
exports.lib.mdurl           = require('mdurl');
exports.lib.ucmicro         = require('uc.micro');

exports.assign              = assign;
exports.isString            = isString;
exports.has                 = has;
exports.unescapeMd          = unescapeMd;
exports.unescapeAll         = unescapeAll;
exports.isValidEntityCode   = isValidEntityCode;
exports.fromCodePoint       = fromCodePoint;
// exports.replaceEntities     = replaceEntities;
exports.escapeHtml          = escapeHtml;
exports.arrayReplaceAt      = arrayReplaceAt;
exports.isSpace             = isSpace;
exports.isWhiteSpace        = isWhiteSpace;
exports.isMdAsciiPunct      = isMdAsciiPunct;
exports.isPunctChar         = isPunctChar;
exports.escapeRE            = escapeRE;
exports.normalizeReference  = normalizeReference;

},{"./entities":1,"mdurl":58,"uc.micro":65,"uc.micro/categories/P/regex":63}],5:[function(require,module,exports){
// Just a shortcut for bulk export
'use strict';


exports.parseLinkLabel       = require('./parse_link_label');
exports.parseLinkDestination = require('./parse_link_destination');
exports.parseLinkTitle       = require('./parse_link_title');

},{"./parse_link_destination":6,"./parse_link_label":7,"./parse_link_title":8}],6:[function(require,module,exports){
// Parse link destination
//
'use strict';


var isSpace     = require('../common/utils').isSpace;
var unescapeAll = require('../common/utils').unescapeAll;


module.exports = function parseLinkDestination(str, pos, max) {
  var code, level,
      lines = 0,
      start = pos,
      result = {
        ok: false,
        pos: 0,
        lines: 0,
        str: ''
      };

  if (str.charCodeAt(pos) === 0x3C /* < */) {
    pos++;
    while (pos < max) {
      code = str.charCodeAt(pos);
      if (code === 0x0A /* \n */ || isSpace(code)) { return result; }
      if (code === 0x3E /* > */) {
        result.pos = pos + 1;
        result.str = unescapeAll(str.slice(start + 1, pos));
        result.ok = true;
        return result;
      }
      if (code === 0x5C /* \ */ && pos + 1 < max) {
        pos += 2;
        continue;
      }

      pos++;
    }

    // no closing '>'
    return result;
  }

  // this should be ... } else { ... branch

  level = 0;
  while (pos < max) {
    code = str.charCodeAt(pos);

    if (code === 0x20) { break; }

    // ascii control characters
    if (code < 0x20 || code === 0x7F) { break; }

    if (code === 0x5C /* \ */ && pos + 1 < max) {
      pos += 2;
      continue;
    }

    if (code === 0x28 /* ( */) {
      level++;
    }

    if (code === 0x29 /* ) */) {
      if (level === 0) { break; }
      level--;
    }

    pos++;
  }

  if (start === pos) { return result; }
  if (level !== 0) { return result; }

  result.str = unescapeAll(str.slice(start, pos));
  result.lines = lines;
  result.pos = pos;
  result.ok = true;
  return result;
};

},{"../common/utils":4}],7:[function(require,module,exports){
// Parse link label
//
// this function assumes that first character ("[") already matches;
// returns the end of the label
//
'use strict';

module.exports = function parseLinkLabel(state, start, disableNested) {
  var level, found, marker, prevPos,
      labelEnd = -1,
      max = state.posMax,
      oldPos = state.pos;

  state.pos = start + 1;
  level = 1;

  while (state.pos < max) {
    marker = state.src.charCodeAt(state.pos);
    if (marker === 0x5D /* ] */) {
      level--;
      if (level === 0) {
        found = true;
        break;
      }
    }

    prevPos = state.pos;
    state.md.inline.skipToken(state);
    if (marker === 0x5B /* [ */) {
      if (prevPos === state.pos - 1) {
        // increase level if we find text `[`, which is not a part of any token
        level++;
      } else if (disableNested) {
        state.pos = oldPos;
        return -1;
      }
    }
  }

  if (found) {
    labelEnd = state.pos;
  }

  // restore old state
  state.pos = oldPos;

  return labelEnd;
};

},{}],8:[function(require,module,exports){
// Parse link title
//
'use strict';


var unescapeAll = require('../common/utils').unescapeAll;


module.exports = function parseLinkTitle(str, pos, max) {
  var code,
      marker,
      lines = 0,
      start = pos,
      result = {
        ok: false,
        pos: 0,
        lines: 0,
        str: ''
      };

  if (pos >= max) { return result; }

  marker = str.charCodeAt(pos);

  if (marker !== 0x22 /* " */ && marker !== 0x27 /* ' */ && marker !== 0x28 /* ( */) { return result; }

  pos++;

  // if opening marker is "(", switch it to closing marker ")"
  if (marker === 0x28) { marker = 0x29; }

  while (pos < max) {
    code = str.charCodeAt(pos);
    if (code === marker) {
      result.pos = pos + 1;
      result.lines = lines;
      result.str = unescapeAll(str.slice(start + 1, pos));
      result.ok = true;
      return result;
    } else if (code === 0x0A) {
      lines++;
    } else if (code === 0x5C /* \ */ && pos + 1 < max) {
      pos++;
      if (str.charCodeAt(pos) === 0x0A) {
        lines++;
      }
    }

    pos++;
  }

  return result;
};

},{"../common/utils":4}],9:[function(require,module,exports){
// Main parser class

'use strict';


var utils        = require('./common/utils');
var helpers      = require('./helpers');
var Renderer     = require('./renderer');
var ParserCore   = require('./parser_core');
var ParserBlock  = require('./parser_block');
var ParserInline = require('./parser_inline');
var LinkifyIt    = require('linkify-it');
var mdurl        = require('mdurl');
var punycode     = require('punycode');


var config = {
  'default': require('./presets/default'),
  zero: require('./presets/zero'),
  commonmark: require('./presets/commonmark')
};

////////////////////////////////////////////////////////////////////////////////
//
// This validator can prohibit more than really needed to prevent XSS. It's a
// tradeoff to keep code simple and to be secure by default.
//
// If you need different setup - override validator method as you wish. Or
// replace it with dummy function and use external sanitizer.
//

var BAD_PROTO_RE = /^(vbscript|javascript|file|data):/;
var GOOD_DATA_RE = /^data:image\/(gif|png|jpeg|webp);/;

function validateLink(url) {
  // url should be normalized at this point, and existing entities are decoded
  var str = url.trim().toLowerCase();

  return BAD_PROTO_RE.test(str) ? (GOOD_DATA_RE.test(str) ? true : false) : true;
}

////////////////////////////////////////////////////////////////////////////////


var RECODE_HOSTNAME_FOR = [ 'http:', 'https:', 'mailto:' ];

function normalizeLink(url) {
  var parsed = mdurl.parse(url, true);

  if (parsed.hostname) {
    // Encode hostnames in urls like:
    // `http://host/`, `https://host/`, `mailto:user@host`, `//host/`
    //
    // We don't encode unknown schemas, because it's likely that we encode
    // something we shouldn't (e.g. `skype:name` treated as `skype:host`)
    //
    if (!parsed.protocol || RECODE_HOSTNAME_FOR.indexOf(parsed.protocol) >= 0) {
      try {
        parsed.hostname = punycode.toASCII(parsed.hostname);
      } catch (er) { /**/ }
    }
  }

  return mdurl.encode(mdurl.format(parsed));
}

function normalizeLinkText(url) {
  var parsed = mdurl.parse(url, true);

  if (parsed.hostname) {
    // Encode hostnames in urls like:
    // `http://host/`, `https://host/`, `mailto:user@host`, `//host/`
    //
    // We don't encode unknown schemas, because it's likely that we encode
    // something we shouldn't (e.g. `skype:name` treated as `skype:host`)
    //
    if (!parsed.protocol || RECODE_HOSTNAME_FOR.indexOf(parsed.protocol) >= 0) {
      try {
        parsed.hostname = punycode.toUnicode(parsed.hostname);
      } catch (er) { /**/ }
    }
  }

  return mdurl.decode(mdurl.format(parsed));
}


/**
 * class MarkdownIt
 *
 * Main parser/renderer class.
 *
 * ##### Usage
 *
 * ```javascript
 * // node.js, "classic" way:
 * var MarkdownIt = require('markdown-it'),
 *     md = new MarkdownIt();
 * var result = md.render('# markdown-it rulezz!');
 *
 * // node.js, the same, but with sugar:
 * var md = require('markdown-it')();
 * var result = md.render('# markdown-it rulezz!');
 *
 * // browser without AMD, added to "window" on script load
 * // Note, there are no dash.
 * var md = window.markdownit();
 * var result = md.render('# markdown-it rulezz!');
 * ```
 *
 * Single line rendering, without paragraph wrap:
 *
 * ```javascript
 * var md = require('markdown-it')();
 * var result = md.renderInline('__markdown-it__ rulezz!');
 * ```
 **/

/**
 * new MarkdownIt([presetName, options])
 * - presetName (String): optional, `commonmark` / `zero`
 * - options (Object)
 *
 * Creates parser instanse with given config. Can be called without `new`.
 *
 * ##### presetName
 *
 * MarkdownIt provides named presets as a convenience to quickly
 * enable/disable active syntax rules and options for common use cases.
 *
 * - ["commonmark"](https://github.com/markdown-it/markdown-it/blob/master/lib/presets/commonmark.js) -
 *   configures parser to strict [CommonMark](http://commonmark.org/) mode.
 * - [default](https://github.com/markdown-it/markdown-it/blob/master/lib/presets/default.js) -
 *   similar to GFM, used when no preset name given. Enables all available rules,
 *   but still without html, typographer & autolinker.
 * - ["zero"](https://github.com/markdown-it/markdown-it/blob/master/lib/presets/zero.js) -
 *   all rules disabled. Useful to quickly setup your config via `.enable()`.
 *   For example, when you need only `bold` and `italic` markup and nothing else.
 *
 * ##### options:
 *
 * - __html__ - `false`. Set `true` to enable HTML tags in source. Be careful!
 *   That's not safe! You may need external sanitizer to protect output from XSS.
 *   It's better to extend features via plugins, instead of enabling HTML.
 * - __xhtmlOut__ - `false`. Set `true` to add '/' when closing single tags
 *   (`<br />`). This is needed only for full CommonMark compatibility. In real
 *   world you will need HTML output.
 * - __breaks__ - `false`. Set `true` to convert `\n` in paragraphs into `<br>`.
 * - __langPrefix__ - `language-`. CSS language class prefix for fenced blocks.
 *   Can be useful for external highlighters.
 * - __linkify__ - `false`. Set `true` to autoconvert URL-like text to links.
 * - __typographer__  - `false`. Set `true` to enable [some language-neutral
 *   replacement](https://github.com/markdown-it/markdown-it/blob/master/lib/rules_core/replacements.js) +
 *   quotes beautification (smartquotes).
 * - __quotes__ - `“”‘’`, String or Array. Double + single quotes replacement
 *   pairs, when typographer enabled and smartquotes on. For example, you can
 *   use `'«»„“'` for Russian, `'„“‚‘'` for German, and
 *   `['«\xA0', '\xA0»', '‹\xA0', '\xA0›']` for French (including nbsp).
 * - __highlight__ - `null`. Highlighter function for fenced code blocks.
 *   Highlighter `function (str, lang)` should return escaped HTML. It can also
 *   return empty string if the source was not changed and should be escaped
 *   externaly. If result starts with <pre... internal wrapper is skipped.
 *
 * ##### Example
 *
 * ```javascript
 * // commonmark mode
 * var md = require('markdown-it')('commonmark');
 *
 * // default mode
 * var md = require('markdown-it')();
 *
 * // enable everything
 * var md = require('markdown-it')({
 *   html: true,
 *   linkify: true,
 *   typographer: true
 * });
 * ```
 *
 * ##### Syntax highlighting
 *
 * ```js
 * var hljs = require('highlight.js') // https://highlightjs.org/
 *
 * var md = require('markdown-it')({
 *   highlight: function (str, lang) {
 *     if (lang && hljs.getLanguage(lang)) {
 *       try {
 *         return hljs.highlight(lang, str, true).value;
 *       } catch (__) {}
 *     }
 *
 *     return ''; // use external default escaping
 *   }
 * });
 * ```
 *
 * Or with full wrapper override (if you need assign class to `<pre>`):
 *
 * ```javascript
 * var hljs = require('highlight.js') // https://highlightjs.org/
 *
 * // Actual default values
 * var md = require('markdown-it')({
 *   highlight: function (str, lang) {
 *     if (lang && hljs.getLanguage(lang)) {
 *       try {
 *         return '<pre class="hljs"><code>' +
 *                hljs.highlight(lang, str, true).value +
 *                '</code></pre>';
 *       } catch (__) {}
 *     }
 *
 *     return '<pre class="hljs"><code>' + md.utils.escapeHtml(str) + '</code></pre>';
 *   }
 * });
 * ```
 *
 **/
function MarkdownIt(presetName, options) {
  if (!(this instanceof MarkdownIt)) {
    return new MarkdownIt(presetName, options);
  }

  if (!options) {
    if (!utils.isString(presetName)) {
      options = presetName || {};
      presetName = 'default';
    }
  }

  /**
   * MarkdownIt#inline -> ParserInline
   *
   * Instance of [[ParserInline]]. You may need it to add new rules when
   * writing plugins. For simple rules control use [[MarkdownIt.disable]] and
   * [[MarkdownIt.enable]].
   **/
  this.inline = new ParserInline();

  /**
   * MarkdownIt#block -> ParserBlock
   *
   * Instance of [[ParserBlock]]. You may need it to add new rules when
   * writing plugins. For simple rules control use [[MarkdownIt.disable]] and
   * [[MarkdownIt.enable]].
   **/
  this.block = new ParserBlock();

  /**
   * MarkdownIt#core -> Core
   *
   * Instance of [[Core]] chain executor. You may need it to add new rules when
   * writing plugins. For simple rules control use [[MarkdownIt.disable]] and
   * [[MarkdownIt.enable]].
   **/
  this.core = new ParserCore();

  /**
   * MarkdownIt#renderer -> Renderer
   *
   * Instance of [[Renderer]]. Use it to modify output look. Or to add rendering
   * rules for new token types, generated by plugins.
   *
   * ##### Example
   *
   * ```javascript
   * var md = require('markdown-it')();
   *
   * function myToken(tokens, idx, options, env, self) {
   *   //...
   *   return result;
   * };
   *
   * md.renderer.rules['my_token'] = myToken
   * ```
   *
   * See [[Renderer]] docs and [source code](https://github.com/markdown-it/markdown-it/blob/master/lib/renderer.js).
   **/
  this.renderer = new Renderer();

  /**
   * MarkdownIt#linkify -> LinkifyIt
   *
   * [linkify-it](https://github.com/markdown-it/linkify-it) instance.
   * Used by [linkify](https://github.com/markdown-it/markdown-it/blob/master/lib/rules_core/linkify.js)
   * rule.
   **/
  this.linkify = new LinkifyIt();

  /**
   * MarkdownIt#validateLink(url) -> Boolean
   *
   * Link validation function. CommonMark allows too much in links. By default
   * we disable `javascript:`, `vbscript:`, `file:` schemas, and almost all `data:...` schemas
   * except some embedded image types.
   *
   * You can change this behaviour:
   *
   * ```javascript
   * var md = require('markdown-it')();
   * // enable everything
   * md.validateLink = function () { return true; }
   * ```
   **/
  this.validateLink = validateLink;

  /**
   * MarkdownIt#normalizeLink(url) -> String
   *
   * Function used to encode link url to a machine-readable format,
   * which includes url-encoding, punycode, etc.
   **/
  this.normalizeLink = normalizeLink;

  /**
   * MarkdownIt#normalizeLinkText(url) -> String
   *
   * Function used to decode link url to a human-readable format`
   **/
  this.normalizeLinkText = normalizeLinkText;


  // Expose utils & helpers for easy acces from plugins

  /**
   * MarkdownIt#utils -> utils
   *
   * Assorted utility functions, useful to write plugins. See details
   * [here](https://github.com/markdown-it/markdown-it/blob/master/lib/common/utils.js).
   **/
  this.utils = utils;

  /**
   * MarkdownIt#helpers -> helpers
   *
   * Link components parser functions, useful to write plugins. See details
   * [here](https://github.com/markdown-it/markdown-it/blob/master/lib/helpers).
   **/
  this.helpers = utils.assign({}, helpers);


  this.options = {};
  this.configure(presetName);

  if (options) { this.set(options); }
}


/** chainable
 * MarkdownIt.set(options)
 *
 * Set parser options (in the same format as in constructor). Probably, you
 * will never need it, but you can change options after constructor call.
 *
 * ##### Example
 *
 * ```javascript
 * var md = require('markdown-it')()
 *             .set({ html: true, breaks: true })
 *             .set({ typographer, true });
 * ```
 *
 * __Note:__ To achieve the best possible performance, don't modify a
 * `markdown-it` instance options on the fly. If you need multiple configurations
 * it's best to create multiple instances and initialize each with separate
 * config.
 **/
MarkdownIt.prototype.set = function (options) {
  utils.assign(this.options, options);
  return this;
};


/** chainable, internal
 * MarkdownIt.configure(presets)
 *
 * Batch load of all options and compenent settings. This is internal method,
 * and you probably will not need it. But if you with - see available presets
 * and data structure [here](https://github.com/markdown-it/markdown-it/tree/master/lib/presets)
 *
 * We strongly recommend to use presets instead of direct config loads. That
 * will give better compatibility with next versions.
 **/
MarkdownIt.prototype.configure = function (presets) {
  var self = this, presetName;

  if (utils.isString(presets)) {
    presetName = presets;
    presets = config[presetName];
    if (!presets) { throw new Error('Wrong `markdown-it` preset "' + presetName + '", check name'); }
  }

  if (!presets) { throw new Error('Wrong `markdown-it` preset, can\'t be empty'); }

  if (presets.options) { self.set(presets.options); }

  if (presets.components) {
    Object.keys(presets.components).forEach(function (name) {
      if (presets.components[name].rules) {
        self[name].ruler.enableOnly(presets.components[name].rules);
      }
      if (presets.components[name].rules2) {
        self[name].ruler2.enableOnly(presets.components[name].rules2);
      }
    });
  }
  return this;
};


/** chainable
 * MarkdownIt.enable(list, ignoreInvalid)
 * - list (String|Array): rule name or list of rule names to enable
 * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
 *
 * Enable list or rules. It will automatically find appropriate components,
 * containing rules with given names. If rule not found, and `ignoreInvalid`
 * not set - throws exception.
 *
 * ##### Example
 *
 * ```javascript
 * var md = require('markdown-it')()
 *             .enable(['sub', 'sup'])
 *             .disable('smartquotes');
 * ```
 **/
MarkdownIt.prototype.enable = function (list, ignoreInvalid) {
  var result = [];

  if (!Array.isArray(list)) { list = [ list ]; }

  [ 'core', 'block', 'inline' ].forEach(function (chain) {
    result = result.concat(this[chain].ruler.enable(list, true));
  }, this);

  result = result.concat(this.inline.ruler2.enable(list, true));

  var missed = list.filter(function (name) { return result.indexOf(name) < 0; });

  if (missed.length && !ignoreInvalid) {
    throw new Error('MarkdownIt. Failed to enable unknown rule(s): ' + missed);
  }

  return this;
};


/** chainable
 * MarkdownIt.disable(list, ignoreInvalid)
 * - list (String|Array): rule name or list of rule names to disable.
 * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
 *
 * The same as [[MarkdownIt.enable]], but turn specified rules off.
 **/
MarkdownIt.prototype.disable = function (list, ignoreInvalid) {
  var result = [];

  if (!Array.isArray(list)) { list = [ list ]; }

  [ 'core', 'block', 'inline' ].forEach(function (chain) {
    result = result.concat(this[chain].ruler.disable(list, true));
  }, this);

  result = result.concat(this.inline.ruler2.disable(list, true));

  var missed = list.filter(function (name) { return result.indexOf(name) < 0; });

  if (missed.length && !ignoreInvalid) {
    throw new Error('MarkdownIt. Failed to disable unknown rule(s): ' + missed);
  }
  return this;
};


/** chainable
 * MarkdownIt.use(plugin, params)
 *
 * Load specified plugin with given params into current parser instance.
 * It's just a sugar to call `plugin(md, params)` with curring.
 *
 * ##### Example
 *
 * ```javascript
 * var iterator = require('markdown-it-for-inline');
 * var md = require('markdown-it')()
 *             .use(iterator, 'foo_replace', 'text', function (tokens, idx) {
 *               tokens[idx].content = tokens[idx].content.replace(/foo/g, 'bar');
 *             });
 * ```
 **/
MarkdownIt.prototype.use = function (plugin /*, params, ... */) {
  var args = [ this ].concat(Array.prototype.slice.call(arguments, 1));
  plugin.apply(plugin, args);
  return this;
};


/** internal
 * MarkdownIt.parse(src, env) -> Array
 * - src (String): source string
 * - env (Object): environment sandbox
 *
 * Parse input string and returns list of block tokens (special token type
 * "inline" will contain list of inline tokens). You should not call this
 * method directly, until you write custom renderer (for example, to produce
 * AST).
 *
 * `env` is used to pass data between "distributed" rules and return additional
 * metadata like reference info, needed for the renderer. It also can be used to
 * inject data in specific cases. Usually, you will be ok to pass `{}`,
 * and then pass updated object to renderer.
 **/
MarkdownIt.prototype.parse = function (src, env) {
  if (typeof src !== 'string') {
    throw new Error('Input data should be a String');
  }

  var state = new this.core.State(src, this, env);

  this.core.process(state);

  return state.tokens;
};


/**
 * MarkdownIt.render(src [, env]) -> String
 * - src (String): source string
 * - env (Object): environment sandbox
 *
 * Render markdown string into html. It does all magic for you :).
 *
 * `env` can be used to inject additional metadata (`{}` by default).
 * But you will not need it with high probability. See also comment
 * in [[MarkdownIt.parse]].
 **/
MarkdownIt.prototype.render = function (src, env) {
  env = env || {};

  return this.renderer.render(this.parse(src, env), this.options, env);
};


/** internal
 * MarkdownIt.parseInline(src, env) -> Array
 * - src (String): source string
 * - env (Object): environment sandbox
 *
 * The same as [[MarkdownIt.parse]] but skip all block rules. It returns the
 * block tokens list with the single `inline` element, containing parsed inline
 * tokens in `children` property. Also updates `env` object.
 **/
MarkdownIt.prototype.parseInline = function (src, env) {
  var state = new this.core.State(src, this, env);

  state.inlineMode = true;
  this.core.process(state);

  return state.tokens;
};


/**
 * MarkdownIt.renderInline(src [, env]) -> String
 * - src (String): source string
 * - env (Object): environment sandbox
 *
 * Similar to [[MarkdownIt.render]] but for single paragraph content. Result
 * will NOT be wrapped into `<p>` tags.
 **/
MarkdownIt.prototype.renderInline = function (src, env) {
  env = env || {};

  return this.renderer.render(this.parseInline(src, env), this.options, env);
};


module.exports = MarkdownIt;

},{"./common/utils":4,"./helpers":5,"./parser_block":10,"./parser_core":11,"./parser_inline":12,"./presets/commonmark":13,"./presets/default":14,"./presets/zero":15,"./renderer":16,"linkify-it":53,"mdurl":58,"punycode":60}],10:[function(require,module,exports){
/** internal
 * class ParserBlock
 *
 * Block-level tokenizer.
 **/
'use strict';


var Ruler           = require('./ruler');


var _rules = [
  // First 2 params - rule name & source. Secondary array - list of rules,
  // which can be terminated by this one.
  [ 'table',      require('./rules_block/table'),      [ 'paragraph', 'reference' ] ],
  [ 'code',       require('./rules_block/code') ],
  [ 'fence',      require('./rules_block/fence'),      [ 'paragraph', 'reference', 'blockquote', 'list' ] ],
  [ 'blockquote', require('./rules_block/blockquote'), [ 'paragraph', 'reference', 'blockquote', 'list' ] ],
  [ 'hr',         require('./rules_block/hr'),         [ 'paragraph', 'reference', 'blockquote', 'list' ] ],
  [ 'list',       require('./rules_block/list'),       [ 'paragraph', 'reference', 'blockquote' ] ],
  [ 'reference',  require('./rules_block/reference') ],
  [ 'heading',    require('./rules_block/heading'),    [ 'paragraph', 'reference', 'blockquote' ] ],
  [ 'lheading',   require('./rules_block/lheading') ],
  [ 'html_block', require('./rules_block/html_block'), [ 'paragraph', 'reference', 'blockquote' ] ],
  [ 'paragraph',  require('./rules_block/paragraph') ]
];


/**
 * new ParserBlock()
 **/
function ParserBlock() {
  /**
   * ParserBlock#ruler -> Ruler
   *
   * [[Ruler]] instance. Keep configuration of block rules.
   **/
  this.ruler = new Ruler();

  for (var i = 0; i < _rules.length; i++) {
    this.ruler.push(_rules[i][0], _rules[i][1], { alt: (_rules[i][2] || []).slice() });
  }
}


// Generate tokens for input range
//
ParserBlock.prototype.tokenize = function (state, startLine, endLine) {
  var ok, i,
      rules = this.ruler.getRules(''),
      len = rules.length,
      line = startLine,
      hasEmptyLines = false,
      maxNesting = state.md.options.maxNesting;

  while (line < endLine) {
    state.line = line = state.skipEmptyLines(line);
    if (line >= endLine) { break; }

    // Termination condition for nested calls.
    // Nested calls currently used for blockquotes & lists
    if (state.sCount[line] < state.blkIndent) { break; }

    // If nesting level exceeded - skip tail to the end. That's not ordinary
    // situation and we should not care about content.
    if (state.level >= maxNesting) {
      state.line = endLine;
      break;
    }

    // Try all possible rules.
    // On success, rule should:
    //
    // - update `state.line`
    // - update `state.tokens`
    // - return true

    for (i = 0; i < len; i++) {
      ok = rules[i](state, line, endLine, false);
      if (ok) { break; }
    }

    // set state.tight if we had an empty line before current tag
    // i.e. latest empty line should not count
    state.tight = !hasEmptyLines;

    // paragraph might "eat" one newline after it in nested lists
    if (state.isEmpty(state.line - 1)) {
      hasEmptyLines = true;
    }

    line = state.line;

    if (line < endLine && state.isEmpty(line)) {
      hasEmptyLines = true;
      line++;
      state.line = line;
    }
  }
};


/**
 * ParserBlock.parse(str, md, env, outTokens)
 *
 * Process input string and push block tokens into `outTokens`
 **/
ParserBlock.prototype.parse = function (src, md, env, outTokens) {
  var state;

  if (!src) { return; }

  state = new this.State(src, md, env, outTokens);

  this.tokenize(state, state.line, state.lineMax);
};


ParserBlock.prototype.State = require('./rules_block/state_block');


module.exports = ParserBlock;

},{"./ruler":17,"./rules_block/blockquote":18,"./rules_block/code":19,"./rules_block/fence":20,"./rules_block/heading":21,"./rules_block/hr":22,"./rules_block/html_block":23,"./rules_block/lheading":24,"./rules_block/list":25,"./rules_block/paragraph":26,"./rules_block/reference":27,"./rules_block/state_block":28,"./rules_block/table":29}],11:[function(require,module,exports){
/** internal
 * class Core
 *
 * Top-level rules executor. Glues block/inline parsers and does intermediate
 * transformations.
 **/
'use strict';


var Ruler  = require('./ruler');


var _rules = [
  [ 'normalize',      require('./rules_core/normalize')      ],
  [ 'block',          require('./rules_core/block')          ],
  [ 'inline',         require('./rules_core/inline')         ],
  [ 'linkify',        require('./rules_core/linkify')        ],
  [ 'replacements',   require('./rules_core/replacements')   ],
  [ 'smartquotes',    require('./rules_core/smartquotes')    ]
];


/**
 * new Core()
 **/
function Core() {
  /**
   * Core#ruler -> Ruler
   *
   * [[Ruler]] instance. Keep configuration of core rules.
   **/
  this.ruler = new Ruler();

  for (var i = 0; i < _rules.length; i++) {
    this.ruler.push(_rules[i][0], _rules[i][1]);
  }
}


/**
 * Core.process(state)
 *
 * Executes core chain rules.
 **/
Core.prototype.process = function (state) {
  var i, l, rules;

  rules = this.ruler.getRules('');

  for (i = 0, l = rules.length; i < l; i++) {
    rules[i](state);
  }
};

Core.prototype.State = require('./rules_core/state_core');


module.exports = Core;

},{"./ruler":17,"./rules_core/block":30,"./rules_core/inline":31,"./rules_core/linkify":32,"./rules_core/normalize":33,"./rules_core/replacements":34,"./rules_core/smartquotes":35,"./rules_core/state_core":36}],12:[function(require,module,exports){
/** internal
 * class ParserInline
 *
 * Tokenizes paragraph content.
 **/
'use strict';


var Ruler           = require('./ruler');


////////////////////////////////////////////////////////////////////////////////
// Parser rules

var _rules = [
  [ 'text',            require('./rules_inline/text') ],
  [ 'newline',         require('./rules_inline/newline') ],
  [ 'escape',          require('./rules_inline/escape') ],
  [ 'backticks',       require('./rules_inline/backticks') ],
  [ 'strikethrough',   require('./rules_inline/strikethrough').tokenize ],
  [ 'emphasis',        require('./rules_inline/emphasis').tokenize ],
  [ 'link',            require('./rules_inline/link') ],
  [ 'image',           require('./rules_inline/image') ],
  [ 'autolink',        require('./rules_inline/autolink') ],
  [ 'html_inline',     require('./rules_inline/html_inline') ],
  [ 'entity',          require('./rules_inline/entity') ]
];

var _rules2 = [
  [ 'balance_pairs',   require('./rules_inline/balance_pairs') ],
  [ 'strikethrough',   require('./rules_inline/strikethrough').postProcess ],
  [ 'emphasis',        require('./rules_inline/emphasis').postProcess ],
  [ 'text_collapse',   require('./rules_inline/text_collapse') ]
];


/**
 * new ParserInline()
 **/
function ParserInline() {
  var i;

  /**
   * ParserInline#ruler -> Ruler
   *
   * [[Ruler]] instance. Keep configuration of inline rules.
   **/
  this.ruler = new Ruler();

  for (i = 0; i < _rules.length; i++) {
    this.ruler.push(_rules[i][0], _rules[i][1]);
  }

  /**
   * ParserInline#ruler2 -> Ruler
   *
   * [[Ruler]] instance. Second ruler used for post-processing
   * (e.g. in emphasis-like rules).
   **/
  this.ruler2 = new Ruler();

  for (i = 0; i < _rules2.length; i++) {
    this.ruler2.push(_rules2[i][0], _rules2[i][1]);
  }
}


// Skip single token by running all rules in validation mode;
// returns `true` if any rule reported success
//
ParserInline.prototype.skipToken = function (state) {
  var ok, i, pos = state.pos,
      rules = this.ruler.getRules(''),
      len = rules.length,
      maxNesting = state.md.options.maxNesting,
      cache = state.cache;


  if (typeof cache[pos] !== 'undefined') {
    state.pos = cache[pos];
    return;
  }

  if (state.level < maxNesting) {
    for (i = 0; i < len; i++) {
      // Increment state.level and decrement it later to limit recursion.
      // It's harmless to do here, because no tokens are created. But ideally,
      // we'd need a separate private state variable for this purpose.
      //
      state.level++;
      ok = rules[i](state, true);
      state.level--;

      if (ok) { break; }
    }
  } else {
    // Too much nesting, just skip until the end of the paragraph.
    //
    // NOTE: this will cause links to behave incorrectly in the following case,
    //       when an amount of `[` is exactly equal to `maxNesting + 1`:
    //
    //       [[[[[[[[[[[[[[[[[[[[[foo]()
    //
    // TODO: remove this workaround when CM standard will allow nested links
    //       (we can replace it by preventing links from being parsed in
    //       validation mode)
    //
    state.pos = state.posMax;
  }

  if (!ok) { state.pos++; }
  cache[pos] = state.pos;
};


// Generate tokens for input range
//
ParserInline.prototype.tokenize = function (state) {
  var ok, i,
      rules = this.ruler.getRules(''),
      len = rules.length,
      end = state.posMax,
      maxNesting = state.md.options.maxNesting;

  while (state.pos < end) {
    // Try all possible rules.
    // On success, rule should:
    //
    // - update `state.pos`
    // - update `state.tokens`
    // - return true

    if (state.level < maxNesting) {
      for (i = 0; i < len; i++) {
        ok = rules[i](state, false);
        if (ok) { break; }
      }
    }

    if (ok) {
      if (state.pos >= end) { break; }
      continue;
    }

    state.pending += state.src[state.pos++];
  }

  if (state.pending) {
    state.pushPending();
  }
};


/**
 * ParserInline.parse(str, md, env, outTokens)
 *
 * Process input string and push inline tokens into `outTokens`
 **/
ParserInline.prototype.parse = function (str, md, env, outTokens) {
  var i, rules, len;
  var state = new this.State(str, md, env, outTokens);

  this.tokenize(state);

  rules = this.ruler2.getRules('');
  len = rules.length;

  for (i = 0; i < len; i++) {
    rules[i](state);
  }
};


ParserInline.prototype.State = require('./rules_inline/state_inline');


module.exports = ParserInline;

},{"./ruler":17,"./rules_inline/autolink":37,"./rules_inline/backticks":38,"./rules_inline/balance_pairs":39,"./rules_inline/emphasis":40,"./rules_inline/entity":41,"./rules_inline/escape":42,"./rules_inline/html_inline":43,"./rules_inline/image":44,"./rules_inline/link":45,"./rules_inline/newline":46,"./rules_inline/state_inline":47,"./rules_inline/strikethrough":48,"./rules_inline/text":49,"./rules_inline/text_collapse":50}],13:[function(require,module,exports){
// Commonmark default options

'use strict';


module.exports = {
  options: {
    html:         true,         // Enable HTML tags in source
    xhtmlOut:     true,         // Use '/' to close single tags (<br />)
    breaks:       false,        // Convert '\n' in paragraphs into <br>
    langPrefix:   'language-',  // CSS language prefix for fenced blocks
    linkify:      false,        // autoconvert URL-like texts to links

    // Enable some language-neutral replacements + quotes beautification
    typographer:  false,

    // Double + single quotes replacement pairs, when typographer enabled,
    // and smartquotes on. Could be either a String or an Array.
    //
    // For example, you can use '«»„“' for Russian, '„“‚‘' for German,
    // and ['«\xA0', '\xA0»', '‹\xA0', '\xA0›'] for French (including nbsp).
    quotes: '\u201c\u201d\u2018\u2019', /* “”‘’ */

    // Highlighter function. Should return escaped HTML,
    // or '' if the source string is not changed and should be escaped externaly.
    // If result starts with <pre... internal wrapper is skipped.
    //
    // function (/*str, lang*/) { return ''; }
    //
    highlight: null,

    maxNesting:   20            // Internal protection, recursion limit
  },

  components: {

    core: {
      rules: [
        'normalize',
        'block',
        'inline'
      ]
    },

    block: {
      rules: [
        'blockquote',
        'code',
        'fence',
        'heading',
        'hr',
        'html_block',
        'lheading',
        'list',
        'reference',
        'paragraph'
      ]
    },

    inline: {
      rules: [
        'autolink',
        'backticks',
        'emphasis',
        'entity',
        'escape',
        'html_inline',
        'image',
        'link',
        'newline',
        'text'
      ],
      rules2: [
        'balance_pairs',
        'emphasis',
        'text_collapse'
      ]
    }
  }
};

},{}],14:[function(require,module,exports){
// markdown-it default options

'use strict';


module.exports = {
  options: {
    html:         false,        // Enable HTML tags in source
    xhtmlOut:     false,        // Use '/' to close single tags (<br />)
    breaks:       false,        // Convert '\n' in paragraphs into <br>
    langPrefix:   'language-',  // CSS language prefix for fenced blocks
    linkify:      false,        // autoconvert URL-like texts to links

    // Enable some language-neutral replacements + quotes beautification
    typographer:  false,

    // Double + single quotes replacement pairs, when typographer enabled,
    // and smartquotes on. Could be either a String or an Array.
    //
    // For example, you can use '«»„“' for Russian, '„“‚‘' for German,
    // and ['«\xA0', '\xA0»', '‹\xA0', '\xA0›'] for French (including nbsp).
    quotes: '\u201c\u201d\u2018\u2019', /* “”‘’ */

    // Highlighter function. Should return escaped HTML,
    // or '' if the source string is not changed and should be escaped externaly.
    // If result starts with <pre... internal wrapper is skipped.
    //
    // function (/*str, lang*/) { return ''; }
    //
    highlight: null,

    maxNesting:   100            // Internal protection, recursion limit
  },

  components: {

    core: {},
    block: {},
    inline: {}
  }
};

},{}],15:[function(require,module,exports){
// "Zero" preset, with nothing enabled. Useful for manual configuring of simple
// modes. For example, to parse bold/italic only.

'use strict';


module.exports = {
  options: {
    html:         false,        // Enable HTML tags in source
    xhtmlOut:     false,        // Use '/' to close single tags (<br />)
    breaks:       false,        // Convert '\n' in paragraphs into <br>
    langPrefix:   'language-',  // CSS language prefix for fenced blocks
    linkify:      false,        // autoconvert URL-like texts to links

    // Enable some language-neutral replacements + quotes beautification
    typographer:  false,

    // Double + single quotes replacement pairs, when typographer enabled,
    // and smartquotes on. Could be either a String or an Array.
    //
    // For example, you can use '«»„“' for Russian, '„“‚‘' for German,
    // and ['«\xA0', '\xA0»', '‹\xA0', '\xA0›'] for French (including nbsp).
    quotes: '\u201c\u201d\u2018\u2019', /* “”‘’ */

    // Highlighter function. Should return escaped HTML,
    // or '' if the source string is not changed and should be escaped externaly.
    // If result starts with <pre... internal wrapper is skipped.
    //
    // function (/*str, lang*/) { return ''; }
    //
    highlight: null,

    maxNesting:   20            // Internal protection, recursion limit
  },

  components: {

    core: {
      rules: [
        'normalize',
        'block',
        'inline'
      ]
    },

    block: {
      rules: [
        'paragraph'
      ]
    },

    inline: {
      rules: [
        'text'
      ],
      rules2: [
        'balance_pairs',
        'text_collapse'
      ]
    }
  }
};

},{}],16:[function(require,module,exports){
/**
 * class Renderer
 *
 * Generates HTML from parsed token stream. Each instance has independent
 * copy of rules. Those can be rewritten with ease. Also, you can add new
 * rules if you create plugin and adds new token types.
 **/
'use strict';


var assign          = require('./common/utils').assign;
var unescapeAll     = require('./common/utils').unescapeAll;
var escapeHtml      = require('./common/utils').escapeHtml;


////////////////////////////////////////////////////////////////////////////////

var default_rules = {};


default_rules.code_inline = function (tokens, idx, options, env, slf) {
  var token = tokens[idx];

  return  '<code' + slf.renderAttrs(token) + '>' +
          escapeHtml(tokens[idx].content) +
          '</code>';
};


default_rules.code_block = function (tokens, idx, options, env, slf) {
  var token = tokens[idx];

  return  '<pre' + slf.renderAttrs(token) + '><code>' +
          escapeHtml(tokens[idx].content) +
          '</code></pre>\n';
};


default_rules.fence = function (tokens, idx, options, env, slf) {
  var token = tokens[idx],
      info = token.info ? unescapeAll(token.info).trim() : '',
      langName = '',
      highlighted, i, tmpAttrs, tmpToken;

  if (info) {
    langName = info.split(/\s+/g)[0];
  }

  if (options.highlight) {
    highlighted = options.highlight(token.content, langName) || escapeHtml(token.content);
  } else {
    highlighted = escapeHtml(token.content);
  }

  if (highlighted.indexOf('<pre') === 0) {
    return highlighted + '\n';
  }

  // If language exists, inject class gently, without modifying original token.
  // May be, one day we will add .clone() for token and simplify this part, but
  // now we prefer to keep things local.
  if (info) {
    i        = token.attrIndex('class');
    tmpAttrs = token.attrs ? token.attrs.slice() : [];

    if (i < 0) {
      tmpAttrs.push([ 'class', options.langPrefix + langName ]);
    } else {
      tmpAttrs[i][1] += ' ' + options.langPrefix + langName;
    }

    // Fake token just to render attributes
    tmpToken = {
      attrs: tmpAttrs
    };

    return  '<pre><code' + slf.renderAttrs(tmpToken) + '>'
          + highlighted
          + '</code></pre>\n';
  }


  return  '<pre><code' + slf.renderAttrs(token) + '>'
        + highlighted
        + '</code></pre>\n';
};


default_rules.image = function (tokens, idx, options, env, slf) {
  var token = tokens[idx];

  // "alt" attr MUST be set, even if empty. Because it's mandatory and
  // should be placed on proper position for tests.
  //
  // Replace content with actual value

  token.attrs[token.attrIndex('alt')][1] =
    slf.renderInlineAsText(token.children, options, env);

  return slf.renderToken(tokens, idx, options);
};


default_rules.hardbreak = function (tokens, idx, options /*, env */) {
  return options.xhtmlOut ? '<br />\n' : '<br>\n';
};
default_rules.softbreak = function (tokens, idx, options /*, env */) {
  return options.breaks ? (options.xhtmlOut ? '<br />\n' : '<br>\n') : '\n';
};


default_rules.text = function (tokens, idx /*, options, env */) {
  return escapeHtml(tokens[idx].content);
};


default_rules.html_block = function (tokens, idx /*, options, env */) {
  return tokens[idx].content;
};
default_rules.html_inline = function (tokens, idx /*, options, env */) {
  return tokens[idx].content;
};


/**
 * new Renderer()
 *
 * Creates new [[Renderer]] instance and fill [[Renderer#rules]] with defaults.
 **/
function Renderer() {

  /**
   * Renderer#rules -> Object
   *
   * Contains render rules for tokens. Can be updated and extended.
   *
   * ##### Example
   *
   * ```javascript
   * var md = require('markdown-it')();
   *
   * md.renderer.rules.strong_open  = function () { return '<b>'; };
   * md.renderer.rules.strong_close = function () { return '</b>'; };
   *
   * var result = md.renderInline(...);
   * ```
   *
   * Each rule is called as independent static function with fixed signature:
   *
   * ```javascript
   * function my_token_render(tokens, idx, options, env, renderer) {
   *   // ...
   *   return renderedHTML;
   * }
   * ```
   *
   * See [source code](https://github.com/markdown-it/markdown-it/blob/master/lib/renderer.js)
   * for more details and examples.
   **/
  this.rules = assign({}, default_rules);
}


/**
 * Renderer.renderAttrs(token) -> String
 *
 * Render token attributes to string.
 **/
Renderer.prototype.renderAttrs = function renderAttrs(token) {
  var i, l, result;

  if (!token.attrs) { return ''; }

  result = '';

  for (i = 0, l = token.attrs.length; i < l; i++) {
    result += ' ' + escapeHtml(token.attrs[i][0]) + '="' + escapeHtml(token.attrs[i][1]) + '"';
  }

  return result;
};


/**
 * Renderer.renderToken(tokens, idx, options) -> String
 * - tokens (Array): list of tokens
 * - idx (Numbed): token index to render
 * - options (Object): params of parser instance
 *
 * Default token renderer. Can be overriden by custom function
 * in [[Renderer#rules]].
 **/
Renderer.prototype.renderToken = function renderToken(tokens, idx, options) {
  var nextToken,
      result = '',
      needLf = false,
      token = tokens[idx];

  // Tight list paragraphs
  if (token.hidden) {
    return '';
  }

  // Insert a newline between hidden paragraph and subsequent opening
  // block-level tag.
  //
  // For example, here we should insert a newline before blockquote:
  //  - a
  //    >
  //
  if (token.block && token.nesting !== -1 && idx && tokens[idx - 1].hidden) {
    result += '\n';
  }

  // Add token name, e.g. `<img`
  result += (token.nesting === -1 ? '</' : '<') + token.tag;

  // Encode attributes, e.g. `<img src="foo"`
  result += this.renderAttrs(token);

  // Add a slash for self-closing tags, e.g. `<img src="foo" /`
  if (token.nesting === 0 && options.xhtmlOut) {
    result += ' /';
  }

  // Check if we need to add a newline after this tag
  if (token.block) {
    needLf = true;

    if (token.nesting === 1) {
      if (idx + 1 < tokens.length) {
        nextToken = tokens[idx + 1];

        if (nextToken.type === 'inline' || nextToken.hidden) {
          // Block-level tag containing an inline tag.
          //
          needLf = false;

        } else if (nextToken.nesting === -1 && nextToken.tag === token.tag) {
          // Opening tag + closing tag of the same type. E.g. `<li></li>`.
          //
          needLf = false;
        }
      }
    }
  }

  result += needLf ? '>\n' : '>';

  return result;
};


/**
 * Renderer.renderInline(tokens, options, env) -> String
 * - tokens (Array): list on block tokens to renter
 * - options (Object): params of parser instance
 * - env (Object): additional data from parsed input (references, for example)
 *
 * The same as [[Renderer.render]], but for single token of `inline` type.
 **/
Renderer.prototype.renderInline = function (tokens, options, env) {
  var type,
      result = '',
      rules = this.rules;

  for (var i = 0, len = tokens.length; i < len; i++) {
    type = tokens[i].type;

    if (typeof rules[type] !== 'undefined') {
      result += rules[type](tokens, i, options, env, this);
    } else {
      result += this.renderToken(tokens, i, options);
    }
  }

  return result;
};


/** internal
 * Renderer.renderInlineAsText(tokens, options, env) -> String
 * - tokens (Array): list on block tokens to renter
 * - options (Object): params of parser instance
 * - env (Object): additional data from parsed input (references, for example)
 *
 * Special kludge for image `alt` attributes to conform CommonMark spec.
 * Don't try to use it! Spec requires to show `alt` content with stripped markup,
 * instead of simple escaping.
 **/
Renderer.prototype.renderInlineAsText = function (tokens, options, env) {
  var result = '';

  for (var i = 0, len = tokens.length; i < len; i++) {
    if (tokens[i].type === 'text') {
      result += tokens[i].content;
    } else if (tokens[i].type === 'image') {
      result += this.renderInlineAsText(tokens[i].children, options, env);
    }
  }

  return result;
};


/**
 * Renderer.render(tokens, options, env) -> String
 * - tokens (Array): list on block tokens to renter
 * - options (Object): params of parser instance
 * - env (Object): additional data from parsed input (references, for example)
 *
 * Takes token stream and generates HTML. Probably, you will never need to call
 * this method directly.
 **/
Renderer.prototype.render = function (tokens, options, env) {
  var i, len, type,
      result = '',
      rules = this.rules;

  for (i = 0, len = tokens.length; i < len; i++) {
    type = tokens[i].type;

    if (type === 'inline') {
      result += this.renderInline(tokens[i].children, options, env);
    } else if (typeof rules[type] !== 'undefined') {
      result += rules[tokens[i].type](tokens, i, options, env, this);
    } else {
      result += this.renderToken(tokens, i, options, env);
    }
  }

  return result;
};

module.exports = Renderer;

},{"./common/utils":4}],17:[function(require,module,exports){
/**
 * class Ruler
 *
 * Helper class, used by [[MarkdownIt#core]], [[MarkdownIt#block]] and
 * [[MarkdownIt#inline]] to manage sequences of functions (rules):
 *
 * - keep rules in defined order
 * - assign the name to each rule
 * - enable/disable rules
 * - add/replace rules
 * - allow assign rules to additional named chains (in the same)
 * - cacheing lists of active rules
 *
 * You will not need use this class directly until write plugins. For simple
 * rules control use [[MarkdownIt.disable]], [[MarkdownIt.enable]] and
 * [[MarkdownIt.use]].
 **/
'use strict';


/**
 * new Ruler()
 **/
function Ruler() {
  // List of added rules. Each element is:
  //
  // {
  //   name: XXX,
  //   enabled: Boolean,
  //   fn: Function(),
  //   alt: [ name2, name3 ]
  // }
  //
  this.__rules__ = [];

  // Cached rule chains.
  //
  // First level - chain name, '' for default.
  // Second level - diginal anchor for fast filtering by charcodes.
  //
  this.__cache__ = null;
}

////////////////////////////////////////////////////////////////////////////////
// Helper methods, should not be used directly


// Find rule index by name
//
Ruler.prototype.__find__ = function (name) {
  for (var i = 0; i < this.__rules__.length; i++) {
    if (this.__rules__[i].name === name) {
      return i;
    }
  }
  return -1;
};


// Build rules lookup cache
//
Ruler.prototype.__compile__ = function () {
  var self = this;
  var chains = [ '' ];

  // collect unique names
  self.__rules__.forEach(function (rule) {
    if (!rule.enabled) { return; }

    rule.alt.forEach(function (altName) {
      if (chains.indexOf(altName) < 0) {
        chains.push(altName);
      }
    });
  });

  self.__cache__ = {};

  chains.forEach(function (chain) {
    self.__cache__[chain] = [];
    self.__rules__.forEach(function (rule) {
      if (!rule.enabled) { return; }

      if (chain && rule.alt.indexOf(chain) < 0) { return; }

      self.__cache__[chain].push(rule.fn);
    });
  });
};


/**
 * Ruler.at(name, fn [, options])
 * - name (String): rule name to replace.
 * - fn (Function): new rule function.
 * - options (Object): new rule options (not mandatory).
 *
 * Replace rule by name with new function & options. Throws error if name not
 * found.
 *
 * ##### Options:
 *
 * - __alt__ - array with names of "alternate" chains.
 *
 * ##### Example
 *
 * Replace existing typorgapher replacement rule with new one:
 *
 * ```javascript
 * var md = require('markdown-it')();
 *
 * md.core.ruler.at('replacements', function replace(state) {
 *   //...
 * });
 * ```
 **/
Ruler.prototype.at = function (name, fn, options) {
  var index = this.__find__(name);
  var opt = options || {};

  if (index === -1) { throw new Error('Parser rule not found: ' + name); }

  this.__rules__[index].fn = fn;
  this.__rules__[index].alt = opt.alt || [];
  this.__cache__ = null;
};


/**
 * Ruler.before(beforeName, ruleName, fn [, options])
 * - beforeName (String): new rule will be added before this one.
 * - ruleName (String): name of added rule.
 * - fn (Function): rule function.
 * - options (Object): rule options (not mandatory).
 *
 * Add new rule to chain before one with given name. See also
 * [[Ruler.after]], [[Ruler.push]].
 *
 * ##### Options:
 *
 * - __alt__ - array with names of "alternate" chains.
 *
 * ##### Example
 *
 * ```javascript
 * var md = require('markdown-it')();
 *
 * md.block.ruler.before('paragraph', 'my_rule', function replace(state) {
 *   //...
 * });
 * ```
 **/
Ruler.prototype.before = function (beforeName, ruleName, fn, options) {
  var index = this.__find__(beforeName);
  var opt = options || {};

  if (index === -1) { throw new Error('Parser rule not found: ' + beforeName); }

  this.__rules__.splice(index, 0, {
    name: ruleName,
    enabled: true,
    fn: fn,
    alt: opt.alt || []
  });

  this.__cache__ = null;
};


/**
 * Ruler.after(afterName, ruleName, fn [, options])
 * - afterName (String): new rule will be added after this one.
 * - ruleName (String): name of added rule.
 * - fn (Function): rule function.
 * - options (Object): rule options (not mandatory).
 *
 * Add new rule to chain after one with given name. See also
 * [[Ruler.before]], [[Ruler.push]].
 *
 * ##### Options:
 *
 * - __alt__ - array with names of "alternate" chains.
 *
 * ##### Example
 *
 * ```javascript
 * var md = require('markdown-it')();
 *
 * md.inline.ruler.after('text', 'my_rule', function replace(state) {
 *   //...
 * });
 * ```
 **/
Ruler.prototype.after = function (afterName, ruleName, fn, options) {
  var index = this.__find__(afterName);
  var opt = options || {};

  if (index === -1) { throw new Error('Parser rule not found: ' + afterName); }

  this.__rules__.splice(index + 1, 0, {
    name: ruleName,
    enabled: true,
    fn: fn,
    alt: opt.alt || []
  });

  this.__cache__ = null;
};

/**
 * Ruler.push(ruleName, fn [, options])
 * - ruleName (String): name of added rule.
 * - fn (Function): rule function.
 * - options (Object): rule options (not mandatory).
 *
 * Push new rule to the end of chain. See also
 * [[Ruler.before]], [[Ruler.after]].
 *
 * ##### Options:
 *
 * - __alt__ - array with names of "alternate" chains.
 *
 * ##### Example
 *
 * ```javascript
 * var md = require('markdown-it')();
 *
 * md.core.ruler.push('my_rule', function replace(state) {
 *   //...
 * });
 * ```
 **/
Ruler.prototype.push = function (ruleName, fn, options) {
  var opt = options || {};

  this.__rules__.push({
    name: ruleName,
    enabled: true,
    fn: fn,
    alt: opt.alt || []
  });

  this.__cache__ = null;
};


/**
 * Ruler.enable(list [, ignoreInvalid]) -> Array
 * - list (String|Array): list of rule names to enable.
 * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
 *
 * Enable rules with given names. If any rule name not found - throw Error.
 * Errors can be disabled by second param.
 *
 * Returns list of found rule names (if no exception happened).
 *
 * See also [[Ruler.disable]], [[Ruler.enableOnly]].
 **/
Ruler.prototype.enable = function (list, ignoreInvalid) {
  if (!Array.isArray(list)) { list = [ list ]; }

  var result = [];

  // Search by name and enable
  list.forEach(function (name) {
    var idx = this.__find__(name);

    if (idx < 0) {
      if (ignoreInvalid) { return; }
      throw new Error('Rules manager: invalid rule name ' + name);
    }
    this.__rules__[idx].enabled = true;
    result.push(name);
  }, this);

  this.__cache__ = null;
  return result;
};


/**
 * Ruler.enableOnly(list [, ignoreInvalid])
 * - list (String|Array): list of rule names to enable (whitelist).
 * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
 *
 * Enable rules with given names, and disable everything else. If any rule name
 * not found - throw Error. Errors can be disabled by second param.
 *
 * See also [[Ruler.disable]], [[Ruler.enable]].
 **/
Ruler.prototype.enableOnly = function (list, ignoreInvalid) {
  if (!Array.isArray(list)) { list = [ list ]; }

  this.__rules__.forEach(function (rule) { rule.enabled = false; });

  this.enable(list, ignoreInvalid);
};


/**
 * Ruler.disable(list [, ignoreInvalid]) -> Array
 * - list (String|Array): list of rule names to disable.
 * - ignoreInvalid (Boolean): set `true` to ignore errors when rule not found.
 *
 * Disable rules with given names. If any rule name not found - throw Error.
 * Errors can be disabled by second param.
 *
 * Returns list of found rule names (if no exception happened).
 *
 * See also [[Ruler.enable]], [[Ruler.enableOnly]].
 **/
Ruler.prototype.disable = function (list, ignoreInvalid) {
  if (!Array.isArray(list)) { list = [ list ]; }

  var result = [];

  // Search by name and disable
  list.forEach(function (name) {
    var idx = this.__find__(name);

    if (idx < 0) {
      if (ignoreInvalid) { return; }
      throw new Error('Rules manager: invalid rule name ' + name);
    }
    this.__rules__[idx].enabled = false;
    result.push(name);
  }, this);

  this.__cache__ = null;
  return result;
};


/**
 * Ruler.getRules(chainName) -> Array
 *
 * Return array of active functions (rules) for given chain name. It analyzes
 * rules configuration, compiles caches if not exists and returns result.
 *
 * Default chain name is `''` (empty string). It can't be skipped. That's
 * done intentionally, to keep signature monomorphic for high speed.
 **/
Ruler.prototype.getRules = function (chainName) {
  if (this.__cache__ === null) {
    this.__compile__();
  }

  // Chain can be empty, if rules disabled. But we still have to return Array.
  return this.__cache__[chainName] || [];
};

module.exports = Ruler;

},{}],18:[function(require,module,exports){
// Block quotes

'use strict';

var isSpace = require('../common/utils').isSpace;


module.exports = function blockquote(state, startLine, endLine, silent) {
  var adjustTab,
      ch,
      i,
      initial,
      l,
      lastLineEmpty,
      lines,
      nextLine,
      offset,
      oldBMarks,
      oldBSCount,
      oldIndent,
      oldParentType,
      oldSCount,
      oldTShift,
      spaceAfterMarker,
      terminate,
      terminatorRules,
      token,
      wasOutdented,
      oldLineMax = state.lineMax,
      pos = state.bMarks[startLine] + state.tShift[startLine],
      max = state.eMarks[startLine];

  // if it's indented more than 3 spaces, it should be a code block
  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }

  // check the block quote marker
  if (state.src.charCodeAt(pos++) !== 0x3E/* > */) { return false; }

  // we know that it's going to be a valid blockquote,
  // so no point trying to find the end of it in silent mode
  if (silent) { return true; }

  // skip spaces after ">" and re-calculate offset
  initial = offset = state.sCount[startLine] + pos - (state.bMarks[startLine] + state.tShift[startLine]);

  // skip one optional space after '>'
  if (state.src.charCodeAt(pos) === 0x20 /* space */) {
    // ' >   test '
    //     ^ -- position start of line here:
    pos++;
    initial++;
    offset++;
    adjustTab = false;
    spaceAfterMarker = true;
  } else if (state.src.charCodeAt(pos) === 0x09 /* tab */) {
    spaceAfterMarker = true;

    if ((state.bsCount[startLine] + offset) % 4 === 3) {
      // '  >\t  test '
      //       ^ -- position start of line here (tab has width===1)
      pos++;
      initial++;
      offset++;
      adjustTab = false;
    } else {
      // ' >\t  test '
      //    ^ -- position start of line here + shift bsCount slightly
      //         to make extra space appear
      adjustTab = true;
    }
  } else {
    spaceAfterMarker = false;
  }

  oldBMarks = [ state.bMarks[startLine] ];
  state.bMarks[startLine] = pos;

  while (pos < max) {
    ch = state.src.charCodeAt(pos);

    if (isSpace(ch)) {
      if (ch === 0x09) {
        offset += 4 - (offset + state.bsCount[startLine] + (adjustTab ? 1 : 0)) % 4;
      } else {
        offset++;
      }
    } else {
      break;
    }

    pos++;
  }

  oldBSCount = [ state.bsCount[startLine] ];
  state.bsCount[startLine] = state.sCount[startLine] + 1 + (spaceAfterMarker ? 1 : 0);

  lastLineEmpty = pos >= max;

  oldSCount = [ state.sCount[startLine] ];
  state.sCount[startLine] = offset - initial;

  oldTShift = [ state.tShift[startLine] ];
  state.tShift[startLine] = pos - state.bMarks[startLine];

  terminatorRules = state.md.block.ruler.getRules('blockquote');

  oldParentType = state.parentType;
  state.parentType = 'blockquote';
  wasOutdented = false;

  // Search the end of the block
  //
  // Block ends with either:
  //  1. an empty line outside:
  //     ```
  //     > test
  //
  //     ```
  //  2. an empty line inside:
  //     ```
  //     >
  //     test
  //     ```
  //  3. another tag:
  //     ```
  //     > test
  //      - - -
  //     ```
  for (nextLine = startLine + 1; nextLine < endLine; nextLine++) {
    // check if it's outdented, i.e. it's inside list item and indented
    // less than said list item:
    //
    // ```
    // 1. anything
    //    > current blockquote
    // 2. checking this line
    // ```
    if (state.sCount[nextLine] < state.blkIndent) wasOutdented = true;

    pos = state.bMarks[nextLine] + state.tShift[nextLine];
    max = state.eMarks[nextLine];

    if (pos >= max) {
      // Case 1: line is not inside the blockquote, and this line is empty.
      break;
    }

    if (state.src.charCodeAt(pos++) === 0x3E/* > */ && !wasOutdented) {
      // This line is inside the blockquote.

      // skip spaces after ">" and re-calculate offset
      initial = offset = state.sCount[nextLine] + pos - (state.bMarks[nextLine] + state.tShift[nextLine]);

      // skip one optional space after '>'
      if (state.src.charCodeAt(pos) === 0x20 /* space */) {
        // ' >   test '
        //     ^ -- position start of line here:
        pos++;
        initial++;
        offset++;
        adjustTab = false;
        spaceAfterMarker = true;
      } else if (state.src.charCodeAt(pos) === 0x09 /* tab */) {
        spaceAfterMarker = true;

        if ((state.bsCount[nextLine] + offset) % 4 === 3) {
          // '  >\t  test '
          //       ^ -- position start of line here (tab has width===1)
          pos++;
          initial++;
          offset++;
          adjustTab = false;
        } else {
          // ' >\t  test '
          //    ^ -- position start of line here + shift bsCount slightly
          //         to make extra space appear
          adjustTab = true;
        }
      } else {
        spaceAfterMarker = false;
      }

      oldBMarks.push(state.bMarks[nextLine]);
      state.bMarks[nextLine] = pos;

      while (pos < max) {
        ch = state.src.charCodeAt(pos);

        if (isSpace(ch)) {
          if (ch === 0x09) {
            offset += 4 - (offset + state.bsCount[nextLine] + (adjustTab ? 1 : 0)) % 4;
          } else {
            offset++;
          }
        } else {
          break;
        }

        pos++;
      }

      lastLineEmpty = pos >= max;

      oldBSCount.push(state.bsCount[nextLine]);
      state.bsCount[nextLine] = state.sCount[nextLine] + 1 + (spaceAfterMarker ? 1 : 0);

      oldSCount.push(state.sCount[nextLine]);
      state.sCount[nextLine] = offset - initial;

      oldTShift.push(state.tShift[nextLine]);
      state.tShift[nextLine] = pos - state.bMarks[nextLine];
      continue;
    }

    // Case 2: line is not inside the blockquote, and the last line was empty.
    if (lastLineEmpty) { break; }

    // Case 3: another tag found.
    terminate = false;
    for (i = 0, l = terminatorRules.length; i < l; i++) {
      if (terminatorRules[i](state, nextLine, endLine, true)) {
        terminate = true;
        break;
      }
    }

    if (terminate) {
      // Quirk to enforce "hard termination mode" for paragraphs;
      // normally if you call `tokenize(state, startLine, nextLine)`,
      // paragraphs will look below nextLine for paragraph continuation,
      // but if blockquote is terminated by another tag, they shouldn't
      state.lineMax = nextLine;

      if (state.blkIndent !== 0) {
        // state.blkIndent was non-zero, we now set it to zero,
        // so we need to re-calculate all offsets to appear as
        // if indent wasn't changed
        oldBMarks.push(state.bMarks[nextLine]);
        oldBSCount.push(state.bsCount[nextLine]);
        oldTShift.push(state.tShift[nextLine]);
        oldSCount.push(state.sCount[nextLine]);
        state.sCount[nextLine] -= state.blkIndent;
      }

      break;
    }

    oldBMarks.push(state.bMarks[nextLine]);
    oldBSCount.push(state.bsCount[nextLine]);
    oldTShift.push(state.tShift[nextLine]);
    oldSCount.push(state.sCount[nextLine]);

    // A negative indentation means that this is a paragraph continuation
    //
    state.sCount[nextLine] = -1;
  }

  oldIndent = state.blkIndent;
  state.blkIndent = 0;

  token        = state.push('blockquote_open', 'blockquote', 1);
  token.markup = '>';
  token.map    = lines = [ startLine, 0 ];

  state.md.block.tokenize(state, startLine, nextLine);

  token        = state.push('blockquote_close', 'blockquote', -1);
  token.markup = '>';

  state.lineMax = oldLineMax;
  state.parentType = oldParentType;
  lines[1] = state.line;

  // Restore original tShift; this might not be necessary since the parser
  // has already been here, but just to make sure we can do that.
  for (i = 0; i < oldTShift.length; i++) {
    state.bMarks[i + startLine] = oldBMarks[i];
    state.tShift[i + startLine] = oldTShift[i];
    state.sCount[i + startLine] = oldSCount[i];
    state.bsCount[i + startLine] = oldBSCount[i];
  }
  state.blkIndent = oldIndent;

  return true;
};

},{"../common/utils":4}],19:[function(require,module,exports){
// Code block (4 spaces padded)

'use strict';


module.exports = function code(state, startLine, endLine/*, silent*/) {
  var nextLine, last, token;

  if (state.sCount[startLine] - state.blkIndent < 4) { return false; }

  last = nextLine = startLine + 1;

  while (nextLine < endLine) {
    if (state.isEmpty(nextLine)) {
      nextLine++;
      continue;
    }

    if (state.sCount[nextLine] - state.blkIndent >= 4) {
      nextLine++;
      last = nextLine;
      continue;
    }
    break;
  }

  state.line = last;

  token         = state.push('code_block', 'code', 0);
  token.content = state.getLines(startLine, last, 4 + state.blkIndent, true);
  token.map     = [ startLine, state.line ];

  return true;
};

},{}],20:[function(require,module,exports){
// fences (``` lang, ~~~ lang)

'use strict';


module.exports = function fence(state, startLine, endLine, silent) {
  var marker, len, params, nextLine, mem, token, markup,
      haveEndMarker = false,
      pos = state.bMarks[startLine] + state.tShift[startLine],
      max = state.eMarks[startLine];

  // if it's indented more than 3 spaces, it should be a code block
  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }

  if (pos + 3 > max) { return false; }

  marker = state.src.charCodeAt(pos);

  if (marker !== 0x7E/* ~ */ && marker !== 0x60 /* ` */) {
    return false;
  }

  // scan marker length
  mem = pos;
  pos = state.skipChars(pos, marker);

  len = pos - mem;

  if (len < 3) { return false; }

  markup = state.src.slice(mem, pos);
  params = state.src.slice(pos, max);

  if (params.indexOf(String.fromCharCode(marker)) >= 0) { return false; }

  // Since start is found, we can report success here in validation mode
  if (silent) { return true; }

  // search end of block
  nextLine = startLine;

  for (;;) {
    nextLine++;
    if (nextLine >= endLine) {
      // unclosed block should be autoclosed by end of document.
      // also block seems to be autoclosed by end of parent
      break;
    }

    pos = mem = state.bMarks[nextLine] + state.tShift[nextLine];
    max = state.eMarks[nextLine];

    if (pos < max && state.sCount[nextLine] < state.blkIndent) {
      // non-empty line with negative indent should stop the list:
      // - ```
      //  test
      break;
    }

    if (state.src.charCodeAt(pos) !== marker) { continue; }

    if (state.sCount[nextLine] - state.blkIndent >= 4) {
      // closing fence should be indented less than 4 spaces
      continue;
    }

    pos = state.skipChars(pos, marker);

    // closing code fence must be at least as long as the opening one
    if (pos - mem < len) { continue; }

    // make sure tail has spaces only
    pos = state.skipSpaces(pos);

    if (pos < max) { continue; }

    haveEndMarker = true;
    // found!
    break;
  }

  // If a fence has heading spaces, they should be removed from its inner block
  len = state.sCount[startLine];

  state.line = nextLine + (haveEndMarker ? 1 : 0);

  token         = state.push('fence', 'code', 0);
  token.info    = params;
  token.content = state.getLines(startLine + 1, nextLine, len, true);
  token.markup  = markup;
  token.map     = [ startLine, state.line ];

  return true;
};

},{}],21:[function(require,module,exports){
// heading (#, ##, ...)

'use strict';

var isSpace = require('../common/utils').isSpace;


module.exports = function heading(state, startLine, endLine, silent) {
  var ch, level, tmp, token,
      pos = state.bMarks[startLine] + state.tShift[startLine],
      max = state.eMarks[startLine];

  // if it's indented more than 3 spaces, it should be a code block
  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }

  ch  = state.src.charCodeAt(pos);

  if (ch !== 0x23/* # */ || pos >= max) { return false; }

  // count heading level
  level = 1;
  ch = state.src.charCodeAt(++pos);
  while (ch === 0x23/* # */ && pos < max && level <= 6) {
    level++;
    ch = state.src.charCodeAt(++pos);
  }

  if (level > 6 || (pos < max && !isSpace(ch))) { return false; }

  if (silent) { return true; }

  // Let's cut tails like '    ###  ' from the end of string

  max = state.skipSpacesBack(max, pos);
  tmp = state.skipCharsBack(max, 0x23, pos); // #
  if (tmp > pos && isSpace(state.src.charCodeAt(tmp - 1))) {
    max = tmp;
  }

  state.line = startLine + 1;

  token        = state.push('heading_open', 'h' + String(level), 1);
  token.markup = '########'.slice(0, level);
  token.map    = [ startLine, state.line ];

  token          = state.push('inline', '', 0);
  token.content  = state.src.slice(pos, max).trim();
  token.map      = [ startLine, state.line ];
  token.children = [];

  token        = state.push('heading_close', 'h' + String(level), -1);
  token.markup = '########'.slice(0, level);

  return true;
};

},{"../common/utils":4}],22:[function(require,module,exports){
// Horizontal rule

'use strict';

var isSpace = require('../common/utils').isSpace;


module.exports = function hr(state, startLine, endLine, silent) {
  var marker, cnt, ch, token,
      pos = state.bMarks[startLine] + state.tShift[startLine],
      max = state.eMarks[startLine];

  // if it's indented more than 3 spaces, it should be a code block
  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }

  marker = state.src.charCodeAt(pos++);

  // Check hr marker
  if (marker !== 0x2A/* * */ &&
      marker !== 0x2D/* - */ &&
      marker !== 0x5F/* _ */) {
    return false;
  }

  // markers can be mixed with spaces, but there should be at least 3 of them

  cnt = 1;
  while (pos < max) {
    ch = state.src.charCodeAt(pos++);
    if (ch !== marker && !isSpace(ch)) { return false; }
    if (ch === marker) { cnt++; }
  }

  if (cnt < 3) { return false; }

  if (silent) { return true; }

  state.line = startLine + 1;

  token        = state.push('hr', 'hr', 0);
  token.map    = [ startLine, state.line ];
  token.markup = Array(cnt + 1).join(String.fromCharCode(marker));

  return true;
};

},{"../common/utils":4}],23:[function(require,module,exports){
// HTML block

'use strict';


var block_names = require('../common/html_blocks');
var HTML_OPEN_CLOSE_TAG_RE = require('../common/html_re').HTML_OPEN_CLOSE_TAG_RE;

// An array of opening and corresponding closing sequences for html tags,
// last argument defines whether it can terminate a paragraph or not
//
var HTML_SEQUENCES = [
  [ /^<(script|pre|style)(?=(\s|>|$))/i, /<\/(script|pre|style)>/i, true ],
  [ /^<!--/,        /-->/,   true ],
  [ /^<\?/,         /\?>/,   true ],
  [ /^<![A-Z]/,     />/,     true ],
  [ /^<!\[CDATA\[/, /\]\]>/, true ],
  [ new RegExp('^</?(' + block_names.join('|') + ')(?=(\\s|/?>|$))', 'i'), /^$/, true ],
  [ new RegExp(HTML_OPEN_CLOSE_TAG_RE.source + '\\s*$'),  /^$/, false ]
];


module.exports = function html_block(state, startLine, endLine, silent) {
  var i, nextLine, token, lineText,
      pos = state.bMarks[startLine] + state.tShift[startLine],
      max = state.eMarks[startLine];

  // if it's indented more than 3 spaces, it should be a code block
  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }

  if (!state.md.options.html) { return false; }

  if (state.src.charCodeAt(pos) !== 0x3C/* < */) { return false; }

  lineText = state.src.slice(pos, max);

  for (i = 0; i < HTML_SEQUENCES.length; i++) {
    if (HTML_SEQUENCES[i][0].test(lineText)) { break; }
  }

  if (i === HTML_SEQUENCES.length) { return false; }

  if (silent) {
    // true if this sequence can be a terminator, false otherwise
    return HTML_SEQUENCES[i][2];
  }

  nextLine = startLine + 1;

  // If we are here - we detected HTML block.
  // Let's roll down till block end.
  if (!HTML_SEQUENCES[i][1].test(lineText)) {
    for (; nextLine < endLine; nextLine++) {
      if (state.sCount[nextLine] < state.blkIndent) { break; }

      pos = state.bMarks[nextLine] + state.tShift[nextLine];
      max = state.eMarks[nextLine];
      lineText = state.src.slice(pos, max);

      if (HTML_SEQUENCES[i][1].test(lineText)) {
        if (lineText.length !== 0) { nextLine++; }
        break;
      }
    }
  }

  state.line = nextLine;

  token         = state.push('html_block', '', 0);
  token.map     = [ startLine, nextLine ];
  token.content = state.getLines(startLine, nextLine, state.blkIndent, true);

  return true;
};

},{"../common/html_blocks":2,"../common/html_re":3}],24:[function(require,module,exports){
// lheading (---, ===)

'use strict';


module.exports = function lheading(state, startLine, endLine/*, silent*/) {
  var content, terminate, i, l, token, pos, max, level, marker,
      nextLine = startLine + 1, oldParentType,
      terminatorRules = state.md.block.ruler.getRules('paragraph');

  // if it's indented more than 3 spaces, it should be a code block
  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }

  oldParentType = state.parentType;
  state.parentType = 'paragraph'; // use paragraph to match terminatorRules

  // jump line-by-line until empty one or EOF
  for (; nextLine < endLine && !state.isEmpty(nextLine); nextLine++) {
    // this would be a code block normally, but after paragraph
    // it's considered a lazy continuation regardless of what's there
    if (state.sCount[nextLine] - state.blkIndent > 3) { continue; }

    //
    // Check for underline in setext header
    //
    if (state.sCount[nextLine] >= state.blkIndent) {
      pos = state.bMarks[nextLine] + state.tShift[nextLine];
      max = state.eMarks[nextLine];

      if (pos < max) {
        marker = state.src.charCodeAt(pos);

        if (marker === 0x2D/* - */ || marker === 0x3D/* = */) {
          pos = state.skipChars(pos, marker);
          pos = state.skipSpaces(pos);

          if (pos >= max) {
            level = (marker === 0x3D/* = */ ? 1 : 2);
            break;
          }
        }
      }
    }

    // quirk for blockquotes, this line should already be checked by that rule
    if (state.sCount[nextLine] < 0) { continue; }

    // Some tags can terminate paragraph without empty line.
    terminate = false;
    for (i = 0, l = terminatorRules.length; i < l; i++) {
      if (terminatorRules[i](state, nextLine, endLine, true)) {
        terminate = true;
        break;
      }
    }
    if (terminate) { break; }
  }

  if (!level) {
    // Didn't find valid underline
    return false;
  }

  content = state.getLines(startLine, nextLine, state.blkIndent, false).trim();

  state.line = nextLine + 1;

  token          = state.push('heading_open', 'h' + String(level), 1);
  token.markup   = String.fromCharCode(marker);
  token.map      = [ startLine, state.line ];

  token          = state.push('inline', '', 0);
  token.content  = content;
  token.map      = [ startLine, state.line - 1 ];
  token.children = [];

  token          = state.push('heading_close', 'h' + String(level), -1);
  token.markup   = String.fromCharCode(marker);

  state.parentType = oldParentType;

  return true;
};

},{}],25:[function(require,module,exports){
// Lists

'use strict';

var isSpace = require('../common/utils').isSpace;


// Search `[-+*][\n ]`, returns next pos after marker on success
// or -1 on fail.
function skipBulletListMarker(state, startLine) {
  var marker, pos, max, ch;

  pos = state.bMarks[startLine] + state.tShift[startLine];
  max = state.eMarks[startLine];

  marker = state.src.charCodeAt(pos++);
  // Check bullet
  if (marker !== 0x2A/* * */ &&
      marker !== 0x2D/* - */ &&
      marker !== 0x2B/* + */) {
    return -1;
  }

  if (pos < max) {
    ch = state.src.charCodeAt(pos);

    if (!isSpace(ch)) {
      // " -test " - is not a list item
      return -1;
    }
  }

  return pos;
}

// Search `\d+[.)][\n ]`, returns next pos after marker on success
// or -1 on fail.
function skipOrderedListMarker(state, startLine) {
  var ch,
      start = state.bMarks[startLine] + state.tShift[startLine],
      pos = start,
      max = state.eMarks[startLine];

  // List marker should have at least 2 chars (digit + dot)
  if (pos + 1 >= max) { return -1; }

  ch = state.src.charCodeAt(pos++);

  if (ch < 0x30/* 0 */ || ch > 0x39/* 9 */) { return -1; }

  for (;;) {
    // EOL -> fail
    if (pos >= max) { return -1; }

    ch = state.src.charCodeAt(pos++);

    if (ch >= 0x30/* 0 */ && ch <= 0x39/* 9 */) {

      // List marker should have no more than 9 digits
      // (prevents integer overflow in browsers)
      if (pos - start >= 10) { return -1; }

      continue;
    }

    // found valid marker
    if (ch === 0x29/* ) */ || ch === 0x2e/* . */) {
      break;
    }

    return -1;
  }


  if (pos < max) {
    ch = state.src.charCodeAt(pos);

    if (!isSpace(ch)) {
      // " 1.test " - is not a list item
      return -1;
    }
  }
  return pos;
}

function markTightParagraphs(state, idx) {
  var i, l,
      level = state.level + 2;

  for (i = idx + 2, l = state.tokens.length - 2; i < l; i++) {
    if (state.tokens[i].level === level && state.tokens[i].type === 'paragraph_open') {
      state.tokens[i + 2].hidden = true;
      state.tokens[i].hidden = true;
      i += 2;
    }
  }
}


module.exports = function list(state, startLine, endLine, silent) {
  var ch,
      contentStart,
      i,
      indent,
      indentAfterMarker,
      initial,
      isOrdered,
      itemLines,
      l,
      listLines,
      listTokIdx,
      markerCharCode,
      markerValue,
      max,
      nextLine,
      offset,
      oldIndent,
      oldLIndent,
      oldParentType,
      oldTShift,
      oldTight,
      pos,
      posAfterMarker,
      prevEmptyEnd,
      start,
      terminate,
      terminatorRules,
      token,
      isTerminatingParagraph = false,
      tight = true;

  // if it's indented more than 3 spaces, it should be a code block
  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }

  // limit conditions when list can interrupt
  // a paragraph (validation mode only)
  if (silent && state.parentType === 'paragraph') {
    // Next list item should still terminate previous list item;
    //
    // This code can fail if plugins use blkIndent as well as lists,
    // but I hope the spec gets fixed long before that happens.
    //
    if (state.tShift[startLine] >= state.blkIndent) {
      isTerminatingParagraph = true;
    }
  }

  // Detect list type and position after marker
  if ((posAfterMarker = skipOrderedListMarker(state, startLine)) >= 0) {
    isOrdered = true;
    start = state.bMarks[startLine] + state.tShift[startLine];
    markerValue = Number(state.src.substr(start, posAfterMarker - start - 1));

    // If we're starting a new ordered list right after
    // a paragraph, it should start with 1.
    if (isTerminatingParagraph && markerValue !== 1) return false;

  } else if ((posAfterMarker = skipBulletListMarker(state, startLine)) >= 0) {
    isOrdered = false;

  } else {
    return false;
  }

  // If we're starting a new unordered list right after
  // a paragraph, first line should not be empty.
  if (isTerminatingParagraph) {
    if (state.skipSpaces(posAfterMarker) >= state.eMarks[startLine]) return false;
  }

  // We should terminate list on style change. Remember first one to compare.
  markerCharCode = state.src.charCodeAt(posAfterMarker - 1);

  // For validation mode we can terminate immediately
  if (silent) { return true; }

  // Start list
  listTokIdx = state.tokens.length;

  if (isOrdered) {
    token       = state.push('ordered_list_open', 'ol', 1);
    if (markerValue !== 1) {
      token.attrs = [ [ 'start', markerValue ] ];
    }

  } else {
    token       = state.push('bullet_list_open', 'ul', 1);
  }

  token.map    = listLines = [ startLine, 0 ];
  token.markup = String.fromCharCode(markerCharCode);

  //
  // Iterate list items
  //

  nextLine = startLine;
  prevEmptyEnd = false;
  terminatorRules = state.md.block.ruler.getRules('list');

  oldParentType = state.parentType;
  state.parentType = 'list';

  while (nextLine < endLine) {
    pos = posAfterMarker;
    max = state.eMarks[nextLine];

    initial = offset = state.sCount[nextLine] + posAfterMarker - (state.bMarks[startLine] + state.tShift[startLine]);

    while (pos < max) {
      ch = state.src.charCodeAt(pos);

      if (ch === 0x09) {
        offset += 4 - (offset + state.bsCount[nextLine]) % 4;
      } else if (ch === 0x20) {
        offset++;
      } else {
        break;
      }

      pos++;
    }

    contentStart = pos;

    if (contentStart >= max) {
      // trimming space in "-    \n  3" case, indent is 1 here
      indentAfterMarker = 1;
    } else {
      indentAfterMarker = offset - initial;
    }

    // If we have more than 4 spaces, the indent is 1
    // (the rest is just indented code block)
    if (indentAfterMarker > 4) { indentAfterMarker = 1; }

    // "  -  test"
    //  ^^^^^ - calculating total length of this thing
    indent = initial + indentAfterMarker;

    // Run subparser & write tokens
    token        = state.push('list_item_open', 'li', 1);
    token.markup = String.fromCharCode(markerCharCode);
    token.map    = itemLines = [ startLine, 0 ];

    oldIndent = state.blkIndent;
    oldTight = state.tight;
    oldTShift = state.tShift[startLine];
    oldLIndent = state.sCount[startLine];
    state.blkIndent = indent;
    state.tight = true;
    state.tShift[startLine] = contentStart - state.bMarks[startLine];
    state.sCount[startLine] = offset;

    if (contentStart >= max && state.isEmpty(startLine + 1)) {
      // workaround for this case
      // (list item is empty, list terminates before "foo"):
      // ~~~~~~~~
      //   -
      //
      //     foo
      // ~~~~~~~~
      state.line = Math.min(state.line + 2, endLine);
    } else {
      state.md.block.tokenize(state, startLine, endLine, true);
    }

    // If any of list item is tight, mark list as tight
    if (!state.tight || prevEmptyEnd) {
      tight = false;
    }
    // Item become loose if finish with empty line,
    // but we should filter last element, because it means list finish
    prevEmptyEnd = (state.line - startLine) > 1 && state.isEmpty(state.line - 1);

    state.blkIndent = oldIndent;
    state.tShift[startLine] = oldTShift;
    state.sCount[startLine] = oldLIndent;
    state.tight = oldTight;

    token        = state.push('list_item_close', 'li', -1);
    token.markup = String.fromCharCode(markerCharCode);

    nextLine = startLine = state.line;
    itemLines[1] = nextLine;
    contentStart = state.bMarks[startLine];

    if (nextLine >= endLine) { break; }

    //
    // Try to check if list is terminated or continued.
    //
    if (state.sCount[nextLine] < state.blkIndent) { break; }

    // fail if terminating block found
    terminate = false;
    for (i = 0, l = terminatorRules.length; i < l; i++) {
      if (terminatorRules[i](state, nextLine, endLine, true)) {
        terminate = true;
        break;
      }
    }
    if (terminate) { break; }

    // fail if list has another type
    if (isOrdered) {
      posAfterMarker = skipOrderedListMarker(state, nextLine);
      if (posAfterMarker < 0) { break; }
    } else {
      posAfterMarker = skipBulletListMarker(state, nextLine);
      if (posAfterMarker < 0) { break; }
    }

    if (markerCharCode !== state.src.charCodeAt(posAfterMarker - 1)) { break; }
  }

  // Finalize list
  if (isOrdered) {
    token = state.push('ordered_list_close', 'ol', -1);
  } else {
    token = state.push('bullet_list_close', 'ul', -1);
  }
  token.markup = String.fromCharCode(markerCharCode);

  listLines[1] = nextLine;
  state.line = nextLine;

  state.parentType = oldParentType;

  // mark paragraphs tight if needed
  if (tight) {
    markTightParagraphs(state, listTokIdx);
  }

  return true;
};

},{"../common/utils":4}],26:[function(require,module,exports){
// Paragraph

'use strict';


module.exports = function paragraph(state, startLine/*, endLine*/) {
  var content, terminate, i, l, token, oldParentType,
      nextLine = startLine + 1,
      terminatorRules = state.md.block.ruler.getRules('paragraph'),
      endLine = state.lineMax;

  oldParentType = state.parentType;
  state.parentType = 'paragraph';

  // jump line-by-line until empty one or EOF
  for (; nextLine < endLine && !state.isEmpty(nextLine); nextLine++) {
    // this would be a code block normally, but after paragraph
    // it's considered a lazy continuation regardless of what's there
    if (state.sCount[nextLine] - state.blkIndent > 3) { continue; }

    // quirk for blockquotes, this line should already be checked by that rule
    if (state.sCount[nextLine] < 0) { continue; }

    // Some tags can terminate paragraph without empty line.
    terminate = false;
    for (i = 0, l = terminatorRules.length; i < l; i++) {
      if (terminatorRules[i](state, nextLine, endLine, true)) {
        terminate = true;
        break;
      }
    }
    if (terminate) { break; }
  }

  content = state.getLines(startLine, nextLine, state.blkIndent, false).trim();

  state.line = nextLine;

  token          = state.push('paragraph_open', 'p', 1);
  token.map      = [ startLine, state.line ];

  token          = state.push('inline', '', 0);
  token.content  = content;
  token.map      = [ startLine, state.line ];
  token.children = [];

  token          = state.push('paragraph_close', 'p', -1);

  state.parentType = oldParentType;

  return true;
};

},{}],27:[function(require,module,exports){
'use strict';


var normalizeReference   = require('../common/utils').normalizeReference;
var isSpace              = require('../common/utils').isSpace;


module.exports = function reference(state, startLine, _endLine, silent) {
  var ch,
      destEndPos,
      destEndLineNo,
      endLine,
      href,
      i,
      l,
      label,
      labelEnd,
      oldParentType,
      res,
      start,
      str,
      terminate,
      terminatorRules,
      title,
      lines = 0,
      pos = state.bMarks[startLine] + state.tShift[startLine],
      max = state.eMarks[startLine],
      nextLine = startLine + 1;

  // if it's indented more than 3 spaces, it should be a code block
  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }

  if (state.src.charCodeAt(pos) !== 0x5B/* [ */) { return false; }

  // Simple check to quickly interrupt scan on [link](url) at the start of line.
  // Can be useful on practice: https://github.com/markdown-it/markdown-it/issues/54
  while (++pos < max) {
    if (state.src.charCodeAt(pos) === 0x5D /* ] */ &&
        state.src.charCodeAt(pos - 1) !== 0x5C/* \ */) {
      if (pos + 1 === max) { return false; }
      if (state.src.charCodeAt(pos + 1) !== 0x3A/* : */) { return false; }
      break;
    }
  }

  endLine = state.lineMax;

  // jump line-by-line until empty one or EOF
  terminatorRules = state.md.block.ruler.getRules('reference');

  oldParentType = state.parentType;
  state.parentType = 'reference';

  for (; nextLine < endLine && !state.isEmpty(nextLine); nextLine++) {
    // this would be a code block normally, but after paragraph
    // it's considered a lazy continuation regardless of what's there
    if (state.sCount[nextLine] - state.blkIndent > 3) { continue; }

    // quirk for blockquotes, this line should already be checked by that rule
    if (state.sCount[nextLine] < 0) { continue; }

    // Some tags can terminate paragraph without empty line.
    terminate = false;
    for (i = 0, l = terminatorRules.length; i < l; i++) {
      if (terminatorRules[i](state, nextLine, endLine, true)) {
        terminate = true;
        break;
      }
    }
    if (terminate) { break; }
  }

  str = state.getLines(startLine, nextLine, state.blkIndent, false).trim();
  max = str.length;

  for (pos = 1; pos < max; pos++) {
    ch = str.charCodeAt(pos);
    if (ch === 0x5B /* [ */) {
      return false;
    } else if (ch === 0x5D /* ] */) {
      labelEnd = pos;
      break;
    } else if (ch === 0x0A /* \n */) {
      lines++;
    } else if (ch === 0x5C /* \ */) {
      pos++;
      if (pos < max && str.charCodeAt(pos) === 0x0A) {
        lines++;
      }
    }
  }

  if (labelEnd < 0 || str.charCodeAt(labelEnd + 1) !== 0x3A/* : */) { return false; }

  // [label]:   destination   'title'
  //         ^^^ skip optional whitespace here
  for (pos = labelEnd + 2; pos < max; pos++) {
    ch = str.charCodeAt(pos);
    if (ch === 0x0A) {
      lines++;
    } else if (isSpace(ch)) {
      /*eslint no-empty:0*/
    } else {
      break;
    }
  }

  // [label]:   destination   'title'
  //            ^^^^^^^^^^^ parse this
  res = state.md.helpers.parseLinkDestination(str, pos, max);
  if (!res.ok) { return false; }

  href = state.md.normalizeLink(res.str);
  if (!state.md.validateLink(href)) { return false; }

  pos = res.pos;
  lines += res.lines;

  // save cursor state, we could require to rollback later
  destEndPos = pos;
  destEndLineNo = lines;

  // [label]:   destination   'title'
  //                       ^^^ skipping those spaces
  start = pos;
  for (; pos < max; pos++) {
    ch = str.charCodeAt(pos);
    if (ch === 0x0A) {
      lines++;
    } else if (isSpace(ch)) {
      /*eslint no-empty:0*/
    } else {
      break;
    }
  }

  // [label]:   destination   'title'
  //                          ^^^^^^^ parse this
  res = state.md.helpers.parseLinkTitle(str, pos, max);
  if (pos < max && start !== pos && res.ok) {
    title = res.str;
    pos = res.pos;
    lines += res.lines;
  } else {
    title = '';
    pos = destEndPos;
    lines = destEndLineNo;
  }

  // skip trailing spaces until the rest of the line
  while (pos < max) {
    ch = str.charCodeAt(pos);
    if (!isSpace(ch)) { break; }
    pos++;
  }

  if (pos < max && str.charCodeAt(pos) !== 0x0A) {
    if (title) {
      // garbage at the end of the line after title,
      // but it could still be a valid reference if we roll back
      title = '';
      pos = destEndPos;
      lines = destEndLineNo;
      while (pos < max) {
        ch = str.charCodeAt(pos);
        if (!isSpace(ch)) { break; }
        pos++;
      }
    }
  }

  if (pos < max && str.charCodeAt(pos) !== 0x0A) {
    // garbage at the end of the line
    return false;
  }

  label = normalizeReference(str.slice(1, labelEnd));
  if (!label) {
    // CommonMark 0.20 disallows empty labels
    return false;
  }

  // Reference can not terminate anything. This check is for safety only.
  /*istanbul ignore if*/
  if (silent) { return true; }

  if (typeof state.env.references === 'undefined') {
    state.env.references = {};
  }
  if (typeof state.env.references[label] === 'undefined') {
    state.env.references[label] = { title: title, href: href };
  }

  state.parentType = oldParentType;

  state.line = startLine + lines + 1;
  return true;
};

},{"../common/utils":4}],28:[function(require,module,exports){
// Parser state class

'use strict';

var Token = require('../token');
var isSpace = require('../common/utils').isSpace;


function StateBlock(src, md, env, tokens) {
  var ch, s, start, pos, len, indent, offset, indent_found;

  this.src = src;

  // link to parser instance
  this.md     = md;

  this.env = env;

  //
  // Internal state vartiables
  //

  this.tokens = tokens;

  this.bMarks = [];  // line begin offsets for fast jumps
  this.eMarks = [];  // line end offsets for fast jumps
  this.tShift = [];  // offsets of the first non-space characters (tabs not expanded)
  this.sCount = [];  // indents for each line (tabs expanded)

  // An amount of virtual spaces (tabs expanded) between beginning
  // of each line (bMarks) and real beginning of that line.
  //
  // It exists only as a hack because blockquotes override bMarks
  // losing information in the process.
  //
  // It's used only when expanding tabs, you can think about it as
  // an initial tab length, e.g. bsCount=21 applied to string `\t123`
  // means first tab should be expanded to 4-21%4 === 3 spaces.
  //
  this.bsCount = [];

  // block parser variables
  this.blkIndent  = 0; // required block content indent
                       // (for example, if we are in list)
  this.line       = 0; // line index in src
  this.lineMax    = 0; // lines count
  this.tight      = false;  // loose/tight mode for lists
  this.ddIndent   = -1; // indent of the current dd block (-1 if there isn't any)

  // can be 'blockquote', 'list', 'root', 'paragraph' or 'reference'
  // used in lists to determine if they interrupt a paragraph
  this.parentType = 'root';

  this.level = 0;

  // renderer
  this.result = '';

  // Create caches
  // Generate markers.
  s = this.src;
  indent_found = false;

  for (start = pos = indent = offset = 0, len = s.length; pos < len; pos++) {
    ch = s.charCodeAt(pos);

    if (!indent_found) {
      if (isSpace(ch)) {
        indent++;

        if (ch === 0x09) {
          offset += 4 - offset % 4;
        } else {
          offset++;
        }
        continue;
      } else {
        indent_found = true;
      }
    }

    if (ch === 0x0A || pos === len - 1) {
      if (ch !== 0x0A) { pos++; }
      this.bMarks.push(start);
      this.eMarks.push(pos);
      this.tShift.push(indent);
      this.sCount.push(offset);
      this.bsCount.push(0);

      indent_found = false;
      indent = 0;
      offset = 0;
      start = pos + 1;
    }
  }

  // Push fake entry to simplify cache bounds checks
  this.bMarks.push(s.length);
  this.eMarks.push(s.length);
  this.tShift.push(0);
  this.sCount.push(0);
  this.bsCount.push(0);

  this.lineMax = this.bMarks.length - 1; // don't count last fake line
}

// Push new token to "stream".
//
StateBlock.prototype.push = function (type, tag, nesting) {
  var token = new Token(type, tag, nesting);
  token.block = true;

  if (nesting < 0) { this.level--; }
  token.level = this.level;
  if (nesting > 0) { this.level++; }

  this.tokens.push(token);
  return token;
};

StateBlock.prototype.isEmpty = function isEmpty(line) {
  return this.bMarks[line] + this.tShift[line] >= this.eMarks[line];
};

StateBlock.prototype.skipEmptyLines = function skipEmptyLines(from) {
  for (var max = this.lineMax; from < max; from++) {
    if (this.bMarks[from] + this.tShift[from] < this.eMarks[from]) {
      break;
    }
  }
  return from;
};

// Skip spaces from given position.
StateBlock.prototype.skipSpaces = function skipSpaces(pos) {
  var ch;

  for (var max = this.src.length; pos < max; pos++) {
    ch = this.src.charCodeAt(pos);
    if (!isSpace(ch)) { break; }
  }
  return pos;
};

// Skip spaces from given position in reverse.
StateBlock.prototype.skipSpacesBack = function skipSpacesBack(pos, min) {
  if (pos <= min) { return pos; }

  while (pos > min) {
    if (!isSpace(this.src.charCodeAt(--pos))) { return pos + 1; }
  }
  return pos;
};

// Skip char codes from given position
StateBlock.prototype.skipChars = function skipChars(pos, code) {
  for (var max = this.src.length; pos < max; pos++) {
    if (this.src.charCodeAt(pos) !== code) { break; }
  }
  return pos;
};

// Skip char codes reverse from given position - 1
StateBlock.prototype.skipCharsBack = function skipCharsBack(pos, code, min) {
  if (pos <= min) { return pos; }

  while (pos > min) {
    if (code !== this.src.charCodeAt(--pos)) { return pos + 1; }
  }
  return pos;
};

// cut lines range from source.
StateBlock.prototype.getLines = function getLines(begin, end, indent, keepLastLF) {
  var i, lineIndent, ch, first, last, queue, lineStart,
      line = begin;

  if (begin >= end) {
    return '';
  }

  queue = new Array(end - begin);

  for (i = 0; line < end; line++, i++) {
    lineIndent = 0;
    lineStart = first = this.bMarks[line];

    if (line + 1 < end || keepLastLF) {
      // No need for bounds check because we have fake entry on tail.
      last = this.eMarks[line] + 1;
    } else {
      last = this.eMarks[line];
    }

    while (first < last && lineIndent < indent) {
      ch = this.src.charCodeAt(first);

      if (isSpace(ch)) {
        if (ch === 0x09) {
          lineIndent += 4 - (lineIndent + this.bsCount[line]) % 4;
        } else {
          lineIndent++;
        }
      } else if (first - lineStart < this.tShift[line]) {
        // patched tShift masked characters to look like spaces (blockquotes, list markers)
        lineIndent++;
      } else {
        break;
      }

      first++;
    }

    if (lineIndent > indent) {
      // partially expanding tabs in code blocks, e.g '\t\tfoobar'
      // with indent=2 becomes '  \tfoobar'
      queue[i] = new Array(lineIndent - indent + 1).join(' ') + this.src.slice(first, last);
    } else {
      queue[i] = this.src.slice(first, last);
    }
  }

  return queue.join('');
};

// re-export Token class to use in block rules
StateBlock.prototype.Token = Token;


module.exports = StateBlock;

},{"../common/utils":4,"../token":51}],29:[function(require,module,exports){
// GFM table, non-standard

'use strict';

var isSpace = require('../common/utils').isSpace;


function getLine(state, line) {
  var pos = state.bMarks[line] + state.blkIndent,
      max = state.eMarks[line];

  return state.src.substr(pos, max - pos);
}

function escapedSplit(str) {
  var result = [],
      pos = 0,
      max = str.length,
      ch,
      escapes = 0,
      lastPos = 0,
      backTicked = false,
      lastBackTick = 0;

  ch  = str.charCodeAt(pos);

  while (pos < max) {
    if (ch === 0x60/* ` */) {
      if (backTicked) {
        // make \` close code sequence, but not open it;
        // the reason is: `\` is correct code block
        backTicked = false;
        lastBackTick = pos;
      } else if (escapes % 2 === 0) {
        backTicked = true;
        lastBackTick = pos;
      }
    } else if (ch === 0x7c/* | */ && (escapes % 2 === 0) && !backTicked) {
      result.push(str.substring(lastPos, pos));
      lastPos = pos + 1;
    }

    if (ch === 0x5c/* \ */) {
      escapes++;
    } else {
      escapes = 0;
    }

    pos++;

    // If there was an un-closed backtick, go back to just after
    // the last backtick, but as if it was a normal character
    if (pos === max && backTicked) {
      backTicked = false;
      pos = lastBackTick + 1;
    }

    ch = str.charCodeAt(pos);
  }

  result.push(str.substring(lastPos));

  return result;
}


module.exports = function table(state, startLine, endLine, silent) {
  var ch, lineText, pos, i, nextLine, columns, columnCount, token,
      aligns, t, tableLines, tbodyLines;

  // should have at least two lines
  if (startLine + 2 > endLine) { return false; }

  nextLine = startLine + 1;

  if (state.sCount[nextLine] < state.blkIndent) { return false; }

  // if it's indented more than 3 spaces, it should be a code block
  if (state.sCount[nextLine] - state.blkIndent >= 4) { return false; }

  // first character of the second line should be '|', '-', ':',
  // and no other characters are allowed but spaces;
  // basically, this is the equivalent of /^[-:|][-:|\s]*$/ regexp

  pos = state.bMarks[nextLine] + state.tShift[nextLine];
  if (pos >= state.eMarks[nextLine]) { return false; }

  ch = state.src.charCodeAt(pos++);
  if (ch !== 0x7C/* | */ && ch !== 0x2D/* - */ && ch !== 0x3A/* : */) { return false; }

  while (pos < state.eMarks[nextLine]) {
    ch = state.src.charCodeAt(pos);

    if (ch !== 0x7C/* | */ && ch !== 0x2D/* - */ && ch !== 0x3A/* : */ && !isSpace(ch)) { return false; }

    pos++;
  }

  lineText = getLine(state, startLine + 1);

  columns = lineText.split('|');
  aligns = [];
  for (i = 0; i < columns.length; i++) {
    t = columns[i].trim();
    if (!t) {
      // allow empty columns before and after table, but not in between columns;
      // e.g. allow ` |---| `, disallow ` ---||--- `
      if (i === 0 || i === columns.length - 1) {
        continue;
      } else {
        return false;
      }
    }

    if (!/^:?-+:?$/.test(t)) { return false; }
    if (t.charCodeAt(t.length - 1) === 0x3A/* : */) {
      aligns.push(t.charCodeAt(0) === 0x3A/* : */ ? 'center' : 'right');
    } else if (t.charCodeAt(0) === 0x3A/* : */) {
      aligns.push('left');
    } else {
      aligns.push('');
    }
  }

  lineText = getLine(state, startLine).trim();
  if (lineText.indexOf('|') === -1) { return false; }
  if (state.sCount[startLine] - state.blkIndent >= 4) { return false; }
  columns = escapedSplit(lineText.replace(/^\||\|$/g, ''));

  // header row will define an amount of columns in the entire table,
  // and align row shouldn't be smaller than that (the rest of the rows can)
  columnCount = columns.length;
  if (columnCount > aligns.length) { return false; }

  if (silent) { return true; }

  token     = state.push('table_open', 'table', 1);
  token.map = tableLines = [ startLine, 0 ];

  token     = state.push('thead_open', 'thead', 1);
  token.map = [ startLine, startLine + 1 ];

  token     = state.push('tr_open', 'tr', 1);
  token.map = [ startLine, startLine + 1 ];

  for (i = 0; i < columns.length; i++) {
    token          = state.push('th_open', 'th', 1);
    token.map      = [ startLine, startLine + 1 ];
    if (aligns[i]) {
      token.attrs  = [ [ 'style', 'text-align:' + aligns[i] ] ];
    }

    token          = state.push('inline', '', 0);
    token.content  = columns[i].trim();
    token.map      = [ startLine, startLine + 1 ];
    token.children = [];

    token          = state.push('th_close', 'th', -1);
  }

  token     = state.push('tr_close', 'tr', -1);
  token     = state.push('thead_close', 'thead', -1);

  token     = state.push('tbody_open', 'tbody', 1);
  token.map = tbodyLines = [ startLine + 2, 0 ];

  for (nextLine = startLine + 2; nextLine < endLine; nextLine++) {
    if (state.sCount[nextLine] < state.blkIndent) { break; }

    lineText = getLine(state, nextLine).trim();
    if (lineText.indexOf('|') === -1) { break; }
    if (state.sCount[nextLine] - state.blkIndent >= 4) { break; }
    columns = escapedSplit(lineText.replace(/^\||\|$/g, ''));

    token = state.push('tr_open', 'tr', 1);
    for (i = 0; i < columnCount; i++) {
      token          = state.push('td_open', 'td', 1);
      if (aligns[i]) {
        token.attrs  = [ [ 'style', 'text-align:' + aligns[i] ] ];
      }

      token          = state.push('inline', '', 0);
      token.content  = columns[i] ? columns[i].trim() : '';
      token.children = [];

      token          = state.push('td_close', 'td', -1);
    }
    token = state.push('tr_close', 'tr', -1);
  }
  token = state.push('tbody_close', 'tbody', -1);
  token = state.push('table_close', 'table', -1);

  tableLines[1] = tbodyLines[1] = nextLine;
  state.line = nextLine;
  return true;
};

},{"../common/utils":4}],30:[function(require,module,exports){
'use strict';


module.exports = function block(state) {
  var token;

  if (state.inlineMode) {
    token          = new state.Token('inline', '', 0);
    token.content  = state.src;
    token.map      = [ 0, 1 ];
    token.children = [];
    state.tokens.push(token);
  } else {
    state.md.block.parse(state.src, state.md, state.env, state.tokens);
  }
};

},{}],31:[function(require,module,exports){
'use strict';

module.exports = function inline(state) {
  var tokens = state.tokens, tok, i, l;

  // Parse inlines
  for (i = 0, l = tokens.length; i < l; i++) {
    tok = tokens[i];
    if (tok.type === 'inline') {
      state.md.inline.parse(tok.content, state.md, state.env, tok.children);
    }
  }
};

},{}],32:[function(require,module,exports){
// Replace link-like texts with link nodes.
//
// Currently restricted by `md.validateLink()` to http/https/ftp
//
'use strict';


var arrayReplaceAt = require('../common/utils').arrayReplaceAt;


function isLinkOpen(str) {
  return /^<a[>\s]/i.test(str);
}
function isLinkClose(str) {
  return /^<\/a\s*>/i.test(str);
}


module.exports = function linkify(state) {
  var i, j, l, tokens, token, currentToken, nodes, ln, text, pos, lastPos,
      level, htmlLinkLevel, url, fullUrl, urlText,
      blockTokens = state.tokens,
      links;

  if (!state.md.options.linkify) { return; }

  for (j = 0, l = blockTokens.length; j < l; j++) {
    if (blockTokens[j].type !== 'inline' ||
        !state.md.linkify.pretest(blockTokens[j].content)) {
      continue;
    }

    tokens = blockTokens[j].children;

    htmlLinkLevel = 0;

    // We scan from the end, to keep position when new tags added.
    // Use reversed logic in links start/end match
    for (i = tokens.length - 1; i >= 0; i--) {
      currentToken = tokens[i];

      // Skip content of markdown links
      if (currentToken.type === 'link_close') {
        i--;
        while (tokens[i].level !== currentToken.level && tokens[i].type !== 'link_open') {
          i--;
        }
        continue;
      }

      // Skip content of html tag links
      if (currentToken.type === 'html_inline') {
        if (isLinkOpen(currentToken.content) && htmlLinkLevel > 0) {
          htmlLinkLevel--;
        }
        if (isLinkClose(currentToken.content)) {
          htmlLinkLevel++;
        }
      }
      if (htmlLinkLevel > 0) { continue; }

      if (currentToken.type === 'text' && state.md.linkify.test(currentToken.content)) {

        text = currentToken.content;
        links = state.md.linkify.match(text);

        // Now split string to nodes
        nodes = [];
        level = currentToken.level;
        lastPos = 0;

        for (ln = 0; ln < links.length; ln++) {

          url = links[ln].url;
          fullUrl = state.md.normalizeLink(url);
          if (!state.md.validateLink(fullUrl)) { continue; }

          urlText = links[ln].text;

          // Linkifier might send raw hostnames like "example.com", where url
          // starts with domain name. So we prepend http:// in those cases,
          // and remove it afterwards.
          //
          if (!links[ln].schema) {
            urlText = state.md.normalizeLinkText('http://' + urlText).replace(/^http:\/\//, '');
          } else if (links[ln].schema === 'mailto:' && !/^mailto:/i.test(urlText)) {
            urlText = state.md.normalizeLinkText('mailto:' + urlText).replace(/^mailto:/, '');
          } else {
            urlText = state.md.normalizeLinkText(urlText);
          }

          pos = links[ln].index;

          if (pos > lastPos) {
            token         = new state.Token('text', '', 0);
            token.content = text.slice(lastPos, pos);
            token.level   = level;
            nodes.push(token);
          }

          token         = new state.Token('link_open', 'a', 1);
          token.attrs   = [ [ 'href', fullUrl ] ];
          token.level   = level++;
          token.markup  = 'linkify';
          token.info    = 'auto';
          nodes.push(token);

          token         = new state.Token('text', '', 0);
          token.content = urlText;
          token.level   = level;
          nodes.push(token);

          token         = new state.Token('link_close', 'a', -1);
          token.level   = --level;
          token.markup  = 'linkify';
          token.info    = 'auto';
          nodes.push(token);

          lastPos = links[ln].lastIndex;
        }
        if (lastPos < text.length) {
          token         = new state.Token('text', '', 0);
          token.content = text.slice(lastPos);
          token.level   = level;
          nodes.push(token);
        }

        // replace current node
        blockTokens[j].children = tokens = arrayReplaceAt(tokens, i, nodes);
      }
    }
  }
};

},{"../common/utils":4}],33:[function(require,module,exports){
// Normalize input string

'use strict';


var NEWLINES_RE  = /\r[\n\u0085]?|[\u2424\u2028\u0085]/g;
var NULL_RE      = /\u0000/g;


module.exports = function inline(state) {
  var str;

  // Normalize newlines
  str = state.src.replace(NEWLINES_RE, '\n');

  // Replace NULL characters
  str = str.replace(NULL_RE, '\uFFFD');

  state.src = str;
};

},{}],34:[function(require,module,exports){
// Simple typographyc replacements
//
// (c) (C) → ©
// (tm) (TM) → ™
// (r) (R) → ®
// +- → ±
// (p) (P) -> §
// ... → … (also ?.... → ?.., !.... → !..)
// ???????? → ???, !!!!! → !!!, `,,` → `,`
// -- → &ndash;, --- → &mdash;
//
'use strict';

// TODO:
// - fractionals 1/2, 1/4, 3/4 -> ½, ¼, ¾
// - miltiplication 2 x 4 -> 2 × 4

var RARE_RE = /\+-|\.\.|\?\?\?\?|!!!!|,,|--/;

// Workaround for phantomjs - need regex without /g flag,
// or root check will fail every second time
var SCOPED_ABBR_TEST_RE = /\((c|tm|r|p)\)/i;

var SCOPED_ABBR_RE = /\((c|tm|r|p)\)/ig;
var SCOPED_ABBR = {
  c: '©',
  r: '®',
  p: '§',
  tm: '™'
};

function replaceFn(match, name) {
  return SCOPED_ABBR[name.toLowerCase()];
}

function replace_scoped(inlineTokens) {
  var i, token, inside_autolink = 0;

  for (i = inlineTokens.length - 1; i >= 0; i--) {
    token = inlineTokens[i];

    if (token.type === 'text' && !inside_autolink) {
      token.content = token.content.replace(SCOPED_ABBR_RE, replaceFn);
    }

    if (token.type === 'link_open' && token.info === 'auto') {
      inside_autolink--;
    }

    if (token.type === 'link_close' && token.info === 'auto') {
      inside_autolink++;
    }
  }
}

function replace_rare(inlineTokens) {
  var i, token, inside_autolink = 0;

  for (i = inlineTokens.length - 1; i >= 0; i--) {
    token = inlineTokens[i];

    if (token.type === 'text' && !inside_autolink) {
      if (RARE_RE.test(token.content)) {
        token.content = token.content
                    .replace(/\+-/g, '±')
                    // .., ..., ....... -> …
                    // but ?..... & !..... -> ?.. & !..
                    .replace(/\.{2,}/g, '…').replace(/([?!])…/g, '$1..')
                    .replace(/([?!]){4,}/g, '$1$1$1').replace(/,{2,}/g, ',')
                    // em-dash
                    .replace(/(^|[^-])---([^-]|$)/mg, '$1\u2014$2')
                    // en-dash
                    .replace(/(^|\s)--(\s|$)/mg, '$1\u2013$2')
                    .replace(/(^|[^-\s])--([^-\s]|$)/mg, '$1\u2013$2');
      }
    }

    if (token.type === 'link_open' && token.info === 'auto') {
      inside_autolink--;
    }

    if (token.type === 'link_close' && token.info === 'auto') {
      inside_autolink++;
    }
  }
}


module.exports = function replace(state) {
  var blkIdx;

  if (!state.md.options.typographer) { return; }

  for (blkIdx = state.tokens.length - 1; blkIdx >= 0; blkIdx--) {

    if (state.tokens[blkIdx].type !== 'inline') { continue; }

    if (SCOPED_ABBR_TEST_RE.test(state.tokens[blkIdx].content)) {
      replace_scoped(state.tokens[blkIdx].children);
    }

    if (RARE_RE.test(state.tokens[blkIdx].content)) {
      replace_rare(state.tokens[blkIdx].children);
    }

  }
};

},{}],35:[function(require,module,exports){
// Convert straight quotation marks to typographic ones
//
'use strict';


var isWhiteSpace   = require('../common/utils').isWhiteSpace;
var isPunctChar    = require('../common/utils').isPunctChar;
var isMdAsciiPunct = require('../common/utils').isMdAsciiPunct;

var QUOTE_TEST_RE = /['"]/;
var QUOTE_RE = /['"]/g;
var APOSTROPHE = '\u2019'; /* ’ */


function replaceAt(str, index, ch) {
  return str.substr(0, index) + ch + str.substr(index + 1);
}

function process_inlines(tokens, state) {
  var i, token, text, t, pos, max, thisLevel, item, lastChar, nextChar,
      isLastPunctChar, isNextPunctChar, isLastWhiteSpace, isNextWhiteSpace,
      canOpen, canClose, j, isSingle, stack, openQuote, closeQuote;

  stack = [];

  for (i = 0; i < tokens.length; i++) {
    token = tokens[i];

    thisLevel = tokens[i].level;

    for (j = stack.length - 1; j >= 0; j--) {
      if (stack[j].level <= thisLevel) { break; }
    }
    stack.length = j + 1;

    if (token.type !== 'text') { continue; }

    text = token.content;
    pos = 0;
    max = text.length;

    /*eslint no-labels:0,block-scoped-var:0*/
    OUTER:
    while (pos < max) {
      QUOTE_RE.lastIndex = pos;
      t = QUOTE_RE.exec(text);
      if (!t) { break; }

      canOpen = canClose = true;
      pos = t.index + 1;
      isSingle = (t[0] === "'");

      // Find previous character,
      // default to space if it's the beginning of the line
      //
      lastChar = 0x20;

      if (t.index - 1 >= 0) {
        lastChar = text.charCodeAt(t.index - 1);
      } else {
        for (j = i - 1; j >= 0; j--) {
          if (tokens[j].type === 'softbreak' || tokens[j].type === 'hardbreak') break; // lastChar defaults to 0x20
          if (tokens[j].type !== 'text') continue;

          lastChar = tokens[j].content.charCodeAt(tokens[j].content.length - 1);
          break;
        }
      }

      // Find next character,
      // default to space if it's the end of the line
      //
      nextChar = 0x20;

      if (pos < max) {
        nextChar = text.charCodeAt(pos);
      } else {
        for (j = i + 1; j < tokens.length; j++) {
          if (tokens[j].type === 'softbreak' || tokens[j].type === 'hardbreak') break; // nextChar defaults to 0x20
          if (tokens[j].type !== 'text') continue;

          nextChar = tokens[j].content.charCodeAt(0);
          break;
        }
      }

      isLastPunctChar = isMdAsciiPunct(lastChar) || isPunctChar(String.fromCharCode(lastChar));
      isNextPunctChar = isMdAsciiPunct(nextChar) || isPunctChar(String.fromCharCode(nextChar));

      isLastWhiteSpace = isWhiteSpace(lastChar);
      isNextWhiteSpace = isWhiteSpace(nextChar);

      if (isNextWhiteSpace) {
        canOpen = false;
      } else if (isNextPunctChar) {
        if (!(isLastWhiteSpace || isLastPunctChar)) {
          canOpen = false;
        }
      }

      if (isLastWhiteSpace) {
        canClose = false;
      } else if (isLastPunctChar) {
        if (!(isNextWhiteSpace || isNextPunctChar)) {
          canClose = false;
        }
      }

      if (nextChar === 0x22 /* " */ && t[0] === '"') {
        if (lastChar >= 0x30 /* 0 */ && lastChar <= 0x39 /* 9 */) {
          // special case: 1"" - count first quote as an inch
          canClose = canOpen = false;
        }
      }

      if (canOpen && canClose) {
        // treat this as the middle of the word
        canOpen = false;
        canClose = isNextPunctChar;
      }

      if (!canOpen && !canClose) {
        // middle of word
        if (isSingle) {
          token.content = replaceAt(token.content, t.index, APOSTROPHE);
        }
        continue;
      }

      if (canClose) {
        // this could be a closing quote, rewind the stack to get a match
        for (j = stack.length - 1; j >= 0; j--) {
          item = stack[j];
          if (stack[j].level < thisLevel) { break; }
          if (item.single === isSingle && stack[j].level === thisLevel) {
            item = stack[j];

            if (isSingle) {
              openQuote = state.md.options.quotes[2];
              closeQuote = state.md.options.quotes[3];
            } else {
              openQuote = state.md.options.quotes[0];
              closeQuote = state.md.options.quotes[1];
            }

            // replace token.content *before* tokens[item.token].content,
            // because, if they are pointing at the same token, replaceAt
            // could mess up indices when quote length != 1
            token.content = replaceAt(token.content, t.index, closeQuote);
            tokens[item.token].content = replaceAt(
              tokens[item.token].content, item.pos, openQuote);

            pos += closeQuote.length - 1;
            if (item.token === i) { pos += openQuote.length - 1; }

            text = token.content;
            max = text.length;

            stack.length = j;
            continue OUTER;
          }
        }
      }

      if (canOpen) {
        stack.push({
          token: i,
          pos: t.index,
          single: isSingle,
          level: thisLevel
        });
      } else if (canClose && isSingle) {
        token.content = replaceAt(token.content, t.index, APOSTROPHE);
      }
    }
  }
}


module.exports = function smartquotes(state) {
  /*eslint max-depth:0*/
  var blkIdx;

  if (!state.md.options.typographer) { return; }

  for (blkIdx = state.tokens.length - 1; blkIdx >= 0; blkIdx--) {

    if (state.tokens[blkIdx].type !== 'inline' ||
        !QUOTE_TEST_RE.test(state.tokens[blkIdx].content)) {
      continue;
    }

    process_inlines(state.tokens[blkIdx].children, state);
  }
};

},{"../common/utils":4}],36:[function(require,module,exports){
// Core state object
//
'use strict';

var Token = require('../token');


function StateCore(src, md, env) {
  this.src = src;
  this.env = env;
  this.tokens = [];
  this.inlineMode = false;
  this.md = md; // link to parser instance
}

// re-export Token class to use in core rules
StateCore.prototype.Token = Token;


module.exports = StateCore;

},{"../token":51}],37:[function(require,module,exports){
// Process autolinks '<protocol:...>'

'use strict';


/*eslint max-len:0*/
var EMAIL_RE    = /^<([a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*)>/;
var AUTOLINK_RE = /^<([a-zA-Z][a-zA-Z0-9+.\-]{1,31}):([^<>\x00-\x20]*)>/;


module.exports = function autolink(state, silent) {
  var tail, linkMatch, emailMatch, url, fullUrl, token,
      pos = state.pos;

  if (state.src.charCodeAt(pos) !== 0x3C/* < */) { return false; }

  tail = state.src.slice(pos);

  if (tail.indexOf('>') < 0) { return false; }

  if (AUTOLINK_RE.test(tail)) {
    linkMatch = tail.match(AUTOLINK_RE);

    url = linkMatch[0].slice(1, -1);
    fullUrl = state.md.normalizeLink(url);
    if (!state.md.validateLink(fullUrl)) { return false; }

    if (!silent) {
      token         = state.push('link_open', 'a', 1);
      token.attrs   = [ [ 'href', fullUrl ] ];
      token.markup  = 'autolink';
      token.info    = 'auto';

      token         = state.push('text', '', 0);
      token.content = state.md.normalizeLinkText(url);

      token         = state.push('link_close', 'a', -1);
      token.markup  = 'autolink';
      token.info    = 'auto';
    }

    state.pos += linkMatch[0].length;
    return true;
  }

  if (EMAIL_RE.test(tail)) {
    emailMatch = tail.match(EMAIL_RE);

    url = emailMatch[0].slice(1, -1);
    fullUrl = state.md.normalizeLink('mailto:' + url);
    if (!state.md.validateLink(fullUrl)) { return false; }

    if (!silent) {
      token         = state.push('link_open', 'a', 1);
      token.attrs   = [ [ 'href', fullUrl ] ];
      token.markup  = 'autolink';
      token.info    = 'auto';

      token         = state.push('text', '', 0);
      token.content = state.md.normalizeLinkText(url);

      token         = state.push('link_close', 'a', -1);
      token.markup  = 'autolink';
      token.info    = 'auto';
    }

    state.pos += emailMatch[0].length;
    return true;
  }

  return false;
};

},{}],38:[function(require,module,exports){
// Parse backticks

'use strict';

module.exports = function backtick(state, silent) {
  var start, max, marker, matchStart, matchEnd, token,
      pos = state.pos,
      ch = state.src.charCodeAt(pos);

  if (ch !== 0x60/* ` */) { return false; }

  start = pos;
  pos++;
  max = state.posMax;

  while (pos < max && state.src.charCodeAt(pos) === 0x60/* ` */) { pos++; }

  marker = state.src.slice(start, pos);

  matchStart = matchEnd = pos;

  while ((matchStart = state.src.indexOf('`', matchEnd)) !== -1) {
    matchEnd = matchStart + 1;

    while (matchEnd < max && state.src.charCodeAt(matchEnd) === 0x60/* ` */) { matchEnd++; }

    if (matchEnd - matchStart === marker.length) {
      if (!silent) {
        token         = state.push('code_inline', 'code', 0);
        token.markup  = marker;
        token.content = state.src.slice(pos, matchStart)
                                 .replace(/[ \n]+/g, ' ')
                                 .trim();
      }
      state.pos = matchEnd;
      return true;
    }
  }

  if (!silent) { state.pending += marker; }
  state.pos += marker.length;
  return true;
};

},{}],39:[function(require,module,exports){
// For each opening emphasis-like marker find a matching closing one
//
'use strict';


module.exports = function link_pairs(state) {
  var i, j, lastDelim, currDelim,
      delimiters = state.delimiters,
      max = state.delimiters.length;

  for (i = 0; i < max; i++) {
    lastDelim = delimiters[i];

    if (!lastDelim.close) { continue; }

    j = i - lastDelim.jump - 1;

    while (j >= 0) {
      currDelim = delimiters[j];

      if (currDelim.open &&
          currDelim.marker === lastDelim.marker &&
          currDelim.end < 0 &&
          currDelim.level === lastDelim.level) {

        // typeofs are for backward compatibility with plugins
        var odd_match = (currDelim.close || lastDelim.open) &&
                        typeof currDelim.length !== 'undefined' &&
                        typeof lastDelim.length !== 'undefined' &&
                        (currDelim.length + lastDelim.length) % 3 === 0;

        if (!odd_match) {
          lastDelim.jump = i - j;
          lastDelim.open = false;
          currDelim.end  = i;
          currDelim.jump = 0;
          break;
        }
      }

      j -= currDelim.jump + 1;
    }
  }
};

},{}],40:[function(require,module,exports){
// Process *this* and _that_
//
'use strict';


// Insert each marker as a separate text token, and add it to delimiter list
//
module.exports.tokenize = function emphasis(state, silent) {
  var i, scanned, token,
      start = state.pos,
      marker = state.src.charCodeAt(start);

  if (silent) { return false; }

  if (marker !== 0x5F /* _ */ && marker !== 0x2A /* * */) { return false; }

  scanned = state.scanDelims(state.pos, marker === 0x2A);

  for (i = 0; i < scanned.length; i++) {
    token         = state.push('text', '', 0);
    token.content = String.fromCharCode(marker);

    state.delimiters.push({
      // Char code of the starting marker (number).
      //
      marker: marker,

      // Total length of these series of delimiters.
      //
      length: scanned.length,

      // An amount of characters before this one that's equivalent to
      // current one. In plain English: if this delimiter does not open
      // an emphasis, neither do previous `jump` characters.
      //
      // Used to skip sequences like "*****" in one step, for 1st asterisk
      // value will be 0, for 2nd it's 1 and so on.
      //
      jump:   i,

      // A position of the token this delimiter corresponds to.
      //
      token:  state.tokens.length - 1,

      // Token level.
      //
      level:  state.level,

      // If this delimiter is matched as a valid opener, `end` will be
      // equal to its position, otherwise it's `-1`.
      //
      end:    -1,

      // Boolean flags that determine if this delimiter could open or close
      // an emphasis.
      //
      open:   scanned.can_open,
      close:  scanned.can_close
    });
  }

  state.pos += scanned.length;

  return true;
};


// Walk through delimiter list and replace text tokens with tags
//
module.exports.postProcess = function emphasis(state) {
  var i,
      startDelim,
      endDelim,
      token,
      ch,
      isStrong,
      delimiters = state.delimiters,
      max = state.delimiters.length;

  for (i = max - 1; i >= 0; i--) {
    startDelim = delimiters[i];

    if (startDelim.marker !== 0x5F/* _ */ && startDelim.marker !== 0x2A/* * */) {
      continue;
    }

    // Process only opening markers
    if (startDelim.end === -1) {
      continue;
    }

    endDelim = delimiters[startDelim.end];

    // If the previous delimiter has the same marker and is adjacent to this one,
    // merge those into one strong delimiter.
    //
    // `<em><em>whatever</em></em>` -> `<strong>whatever</strong>`
    //
    isStrong = i > 0 &&
               delimiters[i - 1].end === startDelim.end + 1 &&
               delimiters[i - 1].token === startDelim.token - 1 &&
               delimiters[startDelim.end + 1].token === endDelim.token + 1 &&
               delimiters[i - 1].marker === startDelim.marker;

    ch = String.fromCharCode(startDelim.marker);

    token         = state.tokens[startDelim.token];
    token.type    = isStrong ? 'strong_open' : 'em_open';
    token.tag     = isStrong ? 'strong' : 'em';
    token.nesting = 1;
    token.markup  = isStrong ? ch + ch : ch;
    token.content = '';

    token         = state.tokens[endDelim.token];
    token.type    = isStrong ? 'strong_close' : 'em_close';
    token.tag     = isStrong ? 'strong' : 'em';
    token.nesting = -1;
    token.markup  = isStrong ? ch + ch : ch;
    token.content = '';

    if (isStrong) {
      state.tokens[delimiters[i - 1].token].content = '';
      state.tokens[delimiters[startDelim.end + 1].token].content = '';
      i--;
    }
  }
};

},{}],41:[function(require,module,exports){
// Process html entity - &#123;, &#xAF;, &quot;, ...

'use strict';

var entities          = require('../common/entities');
var has               = require('../common/utils').has;
var isValidEntityCode = require('../common/utils').isValidEntityCode;
var fromCodePoint     = require('../common/utils').fromCodePoint;


var DIGITAL_RE = /^&#((?:x[a-f0-9]{1,8}|[0-9]{1,8}));/i;
var NAMED_RE   = /^&([a-z][a-z0-9]{1,31});/i;


module.exports = function entity(state, silent) {
  var ch, code, match, pos = state.pos, max = state.posMax;

  if (state.src.charCodeAt(pos) !== 0x26/* & */) { return false; }

  if (pos + 1 < max) {
    ch = state.src.charCodeAt(pos + 1);

    if (ch === 0x23 /* # */) {
      match = state.src.slice(pos).match(DIGITAL_RE);
      if (match) {
        if (!silent) {
          code = match[1][0].toLowerCase() === 'x' ? parseInt(match[1].slice(1), 16) : parseInt(match[1], 10);
          state.pending += isValidEntityCode(code) ? fromCodePoint(code) : fromCodePoint(0xFFFD);
        }
        state.pos += match[0].length;
        return true;
      }
    } else {
      match = state.src.slice(pos).match(NAMED_RE);
      if (match) {
        if (has(entities, match[1])) {
          if (!silent) { state.pending += entities[match[1]]; }
          state.pos += match[0].length;
          return true;
        }
      }
    }
  }

  if (!silent) { state.pending += '&'; }
  state.pos++;
  return true;
};

},{"../common/entities":1,"../common/utils":4}],42:[function(require,module,exports){
// Process escaped chars and hardbreaks

'use strict';

var isSpace = require('../common/utils').isSpace;

var ESCAPED = [];

for (var i = 0; i < 256; i++) { ESCAPED.push(0); }

'\\!"#$%&\'()*+,./:;<=>?@[]^_`{|}~-'
  .split('').forEach(function (ch) { ESCAPED[ch.charCodeAt(0)] = 1; });


module.exports = function escape(state, silent) {
  var ch, pos = state.pos, max = state.posMax;

  if (state.src.charCodeAt(pos) !== 0x5C/* \ */) { return false; }

  pos++;

  if (pos < max) {
    ch = state.src.charCodeAt(pos);

    if (ch < 256 && ESCAPED[ch] !== 0) {
      if (!silent) { state.pending += state.src[pos]; }
      state.pos += 2;
      return true;
    }

    if (ch === 0x0A) {
      if (!silent) {
        state.push('hardbreak', 'br', 0);
      }

      pos++;
      // skip leading whitespaces from next line
      while (pos < max) {
        ch = state.src.charCodeAt(pos);
        if (!isSpace(ch)) { break; }
        pos++;
      }

      state.pos = pos;
      return true;
    }
  }

  if (!silent) { state.pending += '\\'; }
  state.pos++;
  return true;
};

},{"../common/utils":4}],43:[function(require,module,exports){
// Process html tags

'use strict';


var HTML_TAG_RE = require('../common/html_re').HTML_TAG_RE;


function isLetter(ch) {
  /*eslint no-bitwise:0*/
  var lc = ch | 0x20; // to lower case
  return (lc >= 0x61/* a */) && (lc <= 0x7a/* z */);
}


module.exports = function html_inline(state, silent) {
  var ch, match, max, token,
      pos = state.pos;

  if (!state.md.options.html) { return false; }

  // Check start
  max = state.posMax;
  if (state.src.charCodeAt(pos) !== 0x3C/* < */ ||
      pos + 2 >= max) {
    return false;
  }

  // Quick fail on second char
  ch = state.src.charCodeAt(pos + 1);
  if (ch !== 0x21/* ! */ &&
      ch !== 0x3F/* ? */ &&
      ch !== 0x2F/* / */ &&
      !isLetter(ch)) {
    return false;
  }

  match = state.src.slice(pos).match(HTML_TAG_RE);
  if (!match) { return false; }

  if (!silent) {
    token         = state.push('html_inline', '', 0);
    token.content = state.src.slice(pos, pos + match[0].length);
  }
  state.pos += match[0].length;
  return true;
};

},{"../common/html_re":3}],44:[function(require,module,exports){
// Process ![image](<src> "title")

'use strict';

var normalizeReference   = require('../common/utils').normalizeReference;
var isSpace              = require('../common/utils').isSpace;


module.exports = function image(state, silent) {
  var attrs,
      code,
      content,
      label,
      labelEnd,
      labelStart,
      pos,
      ref,
      res,
      title,
      token,
      tokens,
      start,
      href = '',
      oldPos = state.pos,
      max = state.posMax;

  if (state.src.charCodeAt(state.pos) !== 0x21/* ! */) { return false; }
  if (state.src.charCodeAt(state.pos + 1) !== 0x5B/* [ */) { return false; }

  labelStart = state.pos + 2;
  labelEnd = state.md.helpers.parseLinkLabel(state, state.pos + 1, false);

  // parser failed to find ']', so it's not a valid link
  if (labelEnd < 0) { return false; }

  pos = labelEnd + 1;
  if (pos < max && state.src.charCodeAt(pos) === 0x28/* ( */) {
    //
    // Inline link
    //

    // [link](  <href>  "title"  )
    //        ^^ skipping these spaces
    pos++;
    for (; pos < max; pos++) {
      code = state.src.charCodeAt(pos);
      if (!isSpace(code) && code !== 0x0A) { break; }
    }
    if (pos >= max) { return false; }

    // [link](  <href>  "title"  )
    //          ^^^^^^ parsing link destination
    start = pos;
    res = state.md.helpers.parseLinkDestination(state.src, pos, state.posMax);
    if (res.ok) {
      href = state.md.normalizeLink(res.str);
      if (state.md.validateLink(href)) {
        pos = res.pos;
      } else {
        href = '';
      }
    }

    // [link](  <href>  "title"  )
    //                ^^ skipping these spaces
    start = pos;
    for (; pos < max; pos++) {
      code = state.src.charCodeAt(pos);
      if (!isSpace(code) && code !== 0x0A) { break; }
    }

    // [link](  <href>  "title"  )
    //                  ^^^^^^^ parsing link title
    res = state.md.helpers.parseLinkTitle(state.src, pos, state.posMax);
    if (pos < max && start !== pos && res.ok) {
      title = res.str;
      pos = res.pos;

      // [link](  <href>  "title"  )
      //                         ^^ skipping these spaces
      for (; pos < max; pos++) {
        code = state.src.charCodeAt(pos);
        if (!isSpace(code) && code !== 0x0A) { break; }
      }
    } else {
      title = '';
    }

    if (pos >= max || state.src.charCodeAt(pos) !== 0x29/* ) */) {
      state.pos = oldPos;
      return false;
    }
    pos++;
  } else {
    //
    // Link reference
    //
    if (typeof state.env.references === 'undefined') { return false; }

    if (pos < max && state.src.charCodeAt(pos) === 0x5B/* [ */) {
      start = pos + 1;
      pos = state.md.helpers.parseLinkLabel(state, pos);
      if (pos >= 0) {
        label = state.src.slice(start, pos++);
      } else {
        pos = labelEnd + 1;
      }
    } else {
      pos = labelEnd + 1;
    }

    // covers label === '' and label === undefined
    // (collapsed reference link and shortcut reference link respectively)
    if (!label) { label = state.src.slice(labelStart, labelEnd); }

    ref = state.env.references[normalizeReference(label)];
    if (!ref) {
      state.pos = oldPos;
      return false;
    }
    href = ref.href;
    title = ref.title;
  }

  //
  // We found the end of the link, and know for a fact it's a valid link;
  // so all that's left to do is to call tokenizer.
  //
  if (!silent) {
    content = state.src.slice(labelStart, labelEnd);

    state.md.inline.parse(
      content,
      state.md,
      state.env,
      tokens = []
    );

    token          = state.push('image', 'img', 0);
    token.attrs    = attrs = [ [ 'src', href ], [ 'alt', '' ] ];
    token.children = tokens;
    token.content  = content;

    if (title) {
      attrs.push([ 'title', title ]);
    }
  }

  state.pos = pos;
  state.posMax = max;
  return true;
};

},{"../common/utils":4}],45:[function(require,module,exports){
// Process [link](<to> "stuff")

'use strict';

var normalizeReference   = require('../common/utils').normalizeReference;
var isSpace              = require('../common/utils').isSpace;


module.exports = function link(state, silent) {
  var attrs,
      code,
      label,
      labelEnd,
      labelStart,
      pos,
      res,
      ref,
      title,
      token,
      href = '',
      oldPos = state.pos,
      max = state.posMax,
      start = state.pos,
      parseReference = true;

  if (state.src.charCodeAt(state.pos) !== 0x5B/* [ */) { return false; }

  labelStart = state.pos + 1;
  labelEnd = state.md.helpers.parseLinkLabel(state, state.pos, true);

  // parser failed to find ']', so it's not a valid link
  if (labelEnd < 0) { return false; }

  pos = labelEnd + 1;
  if (pos < max && state.src.charCodeAt(pos) === 0x28/* ( */) {
    //
    // Inline link
    //

    // might have found a valid shortcut link, disable reference parsing
    parseReference = false;

    // [link](  <href>  "title"  )
    //        ^^ skipping these spaces
    pos++;
    for (; pos < max; pos++) {
      code = state.src.charCodeAt(pos);
      if (!isSpace(code) && code !== 0x0A) { break; }
    }
    if (pos >= max) { return false; }

    // [link](  <href>  "title"  )
    //          ^^^^^^ parsing link destination
    start = pos;
    res = state.md.helpers.parseLinkDestination(state.src, pos, state.posMax);
    if (res.ok) {
      href = state.md.normalizeLink(res.str);
      if (state.md.validateLink(href)) {
        pos = res.pos;
      } else {
        href = '';
      }
    }

    // [link](  <href>  "title"  )
    //                ^^ skipping these spaces
    start = pos;
    for (; pos < max; pos++) {
      code = state.src.charCodeAt(pos);
      if (!isSpace(code) && code !== 0x0A) { break; }
    }

    // [link](  <href>  "title"  )
    //                  ^^^^^^^ parsing link title
    res = state.md.helpers.parseLinkTitle(state.src, pos, state.posMax);
    if (pos < max && start !== pos && res.ok) {
      title = res.str;
      pos = res.pos;

      // [link](  <href>  "title"  )
      //                         ^^ skipping these spaces
      for (; pos < max; pos++) {
        code = state.src.charCodeAt(pos);
        if (!isSpace(code) && code !== 0x0A) { break; }
      }
    } else {
      title = '';
    }

    if (pos >= max || state.src.charCodeAt(pos) !== 0x29/* ) */) {
      // parsing a valid shortcut link failed, fallback to reference
      parseReference = true;
    }
    pos++;
  }

  if (parseReference) {
    //
    // Link reference
    //
    if (typeof state.env.references === 'undefined') { return false; }

    if (pos < max && state.src.charCodeAt(pos) === 0x5B/* [ */) {
      start = pos + 1;
      pos = state.md.helpers.parseLinkLabel(state, pos);
      if (pos >= 0) {
        label = state.src.slice(start, pos++);
      } else {
        pos = labelEnd + 1;
      }
    } else {
      pos = labelEnd + 1;
    }

    // covers label === '' and label === undefined
    // (collapsed reference link and shortcut reference link respectively)
    if (!label) { label = state.src.slice(labelStart, labelEnd); }

    ref = state.env.references[normalizeReference(label)];
    if (!ref) {
      state.pos = oldPos;
      return false;
    }
    href = ref.href;
    title = ref.title;
  }

  //
  // We found the end of the link, and know for a fact it's a valid link;
  // so all that's left to do is to call tokenizer.
  //
  if (!silent) {
    state.pos = labelStart;
    state.posMax = labelEnd;

    token        = state.push('link_open', 'a', 1);
    token.attrs  = attrs = [ [ 'href', href ] ];
    if (title) {
      attrs.push([ 'title', title ]);
    }

    state.md.inline.tokenize(state);

    token        = state.push('link_close', 'a', -1);
  }

  state.pos = pos;
  state.posMax = max;
  return true;
};

},{"../common/utils":4}],46:[function(require,module,exports){
// Proceess '\n'

'use strict';

var isSpace = require('../common/utils').isSpace;


module.exports = function newline(state, silent) {
  var pmax, max, pos = state.pos;

  if (state.src.charCodeAt(pos) !== 0x0A/* \n */) { return false; }

  pmax = state.pending.length - 1;
  max = state.posMax;

  // '  \n' -> hardbreak
  // Lookup in pending chars is bad practice! Don't copy to other rules!
  // Pending string is stored in concat mode, indexed lookups will cause
  // convertion to flat mode.
  if (!silent) {
    if (pmax >= 0 && state.pending.charCodeAt(pmax) === 0x20) {
      if (pmax >= 1 && state.pending.charCodeAt(pmax - 1) === 0x20) {
        state.pending = state.pending.replace(/ +$/, '');
        state.push('hardbreak', 'br', 0);
      } else {
        state.pending = state.pending.slice(0, -1);
        state.push('softbreak', 'br', 0);
      }

    } else {
      state.push('softbreak', 'br', 0);
    }
  }

  pos++;

  // skip heading spaces for next line
  while (pos < max && isSpace(state.src.charCodeAt(pos))) { pos++; }

  state.pos = pos;
  return true;
};

},{"../common/utils":4}],47:[function(require,module,exports){
// Inline parser state

'use strict';


var Token          = require('../token');
var isWhiteSpace   = require('../common/utils').isWhiteSpace;
var isPunctChar    = require('../common/utils').isPunctChar;
var isMdAsciiPunct = require('../common/utils').isMdAsciiPunct;


function StateInline(src, md, env, outTokens) {
  this.src = src;
  this.env = env;
  this.md = md;
  this.tokens = outTokens;

  this.pos = 0;
  this.posMax = this.src.length;
  this.level = 0;
  this.pending = '';
  this.pendingLevel = 0;

  this.cache = {};        // Stores { start: end } pairs. Useful for backtrack
                          // optimization of pairs parse (emphasis, strikes).

  this.delimiters = [];   // Emphasis-like delimiters
}


// Flush pending text
//
StateInline.prototype.pushPending = function () {
  var token = new Token('text', '', 0);
  token.content = this.pending;
  token.level = this.pendingLevel;
  this.tokens.push(token);
  this.pending = '';
  return token;
};


// Push new token to "stream".
// If pending text exists - flush it as text token
//
StateInline.prototype.push = function (type, tag, nesting) {
  if (this.pending) {
    this.pushPending();
  }

  var token = new Token(type, tag, nesting);

  if (nesting < 0) { this.level--; }
  token.level = this.level;
  if (nesting > 0) { this.level++; }

  this.pendingLevel = this.level;
  this.tokens.push(token);
  return token;
};


// Scan a sequence of emphasis-like markers, and determine whether
// it can start an emphasis sequence or end an emphasis sequence.
//
//  - start - position to scan from (it should point at a valid marker);
//  - canSplitWord - determine if these markers can be found inside a word
//
StateInline.prototype.scanDelims = function (start, canSplitWord) {
  var pos = start, lastChar, nextChar, count, can_open, can_close,
      isLastWhiteSpace, isLastPunctChar,
      isNextWhiteSpace, isNextPunctChar,
      left_flanking = true,
      right_flanking = true,
      max = this.posMax,
      marker = this.src.charCodeAt(start);

  // treat beginning of the line as a whitespace
  lastChar = start > 0 ? this.src.charCodeAt(start - 1) : 0x20;

  while (pos < max && this.src.charCodeAt(pos) === marker) { pos++; }

  count = pos - start;

  // treat end of the line as a whitespace
  nextChar = pos < max ? this.src.charCodeAt(pos) : 0x20;

  isLastPunctChar = isMdAsciiPunct(lastChar) || isPunctChar(String.fromCharCode(lastChar));
  isNextPunctChar = isMdAsciiPunct(nextChar) || isPunctChar(String.fromCharCode(nextChar));

  isLastWhiteSpace = isWhiteSpace(lastChar);
  isNextWhiteSpace = isWhiteSpace(nextChar);

  if (isNextWhiteSpace) {
    left_flanking = false;
  } else if (isNextPunctChar) {
    if (!(isLastWhiteSpace || isLastPunctChar)) {
      left_flanking = false;
    }
  }

  if (isLastWhiteSpace) {
    right_flanking = false;
  } else if (isLastPunctChar) {
    if (!(isNextWhiteSpace || isNextPunctChar)) {
      right_flanking = false;
    }
  }

  if (!canSplitWord) {
    can_open  = left_flanking  && (!right_flanking || isLastPunctChar);
    can_close = right_flanking && (!left_flanking  || isNextPunctChar);
  } else {
    can_open  = left_flanking;
    can_close = right_flanking;
  }

  return {
    can_open:  can_open,
    can_close: can_close,
    length:    count
  };
};


// re-export Token class to use in block rules
StateInline.prototype.Token = Token;


module.exports = StateInline;

},{"../common/utils":4,"../token":51}],48:[function(require,module,exports){
// ~~strike through~~
//
'use strict';


// Insert each marker as a separate text token, and add it to delimiter list
//
module.exports.tokenize = function strikethrough(state, silent) {
  var i, scanned, token, len, ch,
      start = state.pos,
      marker = state.src.charCodeAt(start);

  if (silent) { return false; }

  if (marker !== 0x7E/* ~ */) { return false; }

  scanned = state.scanDelims(state.pos, true);
  len = scanned.length;
  ch = String.fromCharCode(marker);

  if (len < 2) { return false; }

  if (len % 2) {
    token         = state.push('text', '', 0);
    token.content = ch;
    len--;
  }

  for (i = 0; i < len; i += 2) {
    token         = state.push('text', '', 0);
    token.content = ch + ch;

    state.delimiters.push({
      marker: marker,
      jump:   i,
      token:  state.tokens.length - 1,
      level:  state.level,
      end:    -1,
      open:   scanned.can_open,
      close:  scanned.can_close
    });
  }

  state.pos += scanned.length;

  return true;
};


// Walk through delimiter list and replace text tokens with tags
//
module.exports.postProcess = function strikethrough(state) {
  var i, j,
      startDelim,
      endDelim,
      token,
      loneMarkers = [],
      delimiters = state.delimiters,
      max = state.delimiters.length;

  for (i = 0; i < max; i++) {
    startDelim = delimiters[i];

    if (startDelim.marker !== 0x7E/* ~ */) {
      continue;
    }

    if (startDelim.end === -1) {
      continue;
    }

    endDelim = delimiters[startDelim.end];

    token         = state.tokens[startDelim.token];
    token.type    = 's_open';
    token.tag     = 's';
    token.nesting = 1;
    token.markup  = '~~';
    token.content = '';

    token         = state.tokens[endDelim.token];
    token.type    = 's_close';
    token.tag     = 's';
    token.nesting = -1;
    token.markup  = '~~';
    token.content = '';

    if (state.tokens[endDelim.token - 1].type === 'text' &&
        state.tokens[endDelim.token - 1].content === '~') {

      loneMarkers.push(endDelim.token - 1);
    }
  }

  // If a marker sequence has an odd number of characters, it's splitted
  // like this: `~~~~~` -> `~` + `~~` + `~~`, leaving one marker at the
  // start of the sequence.
  //
  // So, we have to move all those markers after subsequent s_close tags.
  //
  while (loneMarkers.length) {
    i = loneMarkers.pop();
    j = i + 1;

    while (j < state.tokens.length && state.tokens[j].type === 's_close') {
      j++;
    }

    j--;

    if (i !== j) {
      token = state.tokens[j];
      state.tokens[j] = state.tokens[i];
      state.tokens[i] = token;
    }
  }
};

},{}],49:[function(require,module,exports){
// Skip text characters for text token, place those to pending buffer
// and increment current pos

'use strict';


// Rule to skip pure text
// '{}$%@~+=:' reserved for extentions

// !, ", #, $, %, &, ', (, ), *, +, ,, -, ., /, :, ;, <, =, >, ?, @, [, \, ], ^, _, `, {, |, }, or ~

// !!!! Don't confuse with "Markdown ASCII Punctuation" chars
// http://spec.commonmark.org/0.15/#ascii-punctuation-character
function isTerminatorChar(ch) {
  switch (ch) {
    case 0x0A/* \n */:
    case 0x21/* ! */:
    case 0x23/* # */:
    case 0x24/* $ */:
    case 0x25/* % */:
    case 0x26/* & */:
    case 0x2A/* * */:
    case 0x2B/* + */:
    case 0x2D/* - */:
    case 0x3A/* : */:
    case 0x3C/* < */:
    case 0x3D/* = */:
    case 0x3E/* > */:
    case 0x40/* @ */:
    case 0x5B/* [ */:
    case 0x5C/* \ */:
    case 0x5D/* ] */:
    case 0x5E/* ^ */:
    case 0x5F/* _ */:
    case 0x60/* ` */:
    case 0x7B/* { */:
    case 0x7D/* } */:
    case 0x7E/* ~ */:
      return true;
    default:
      return false;
  }
}

module.exports = function text(state, silent) {
  var pos = state.pos;

  while (pos < state.posMax && !isTerminatorChar(state.src.charCodeAt(pos))) {
    pos++;
  }

  if (pos === state.pos) { return false; }

  if (!silent) { state.pending += state.src.slice(state.pos, pos); }

  state.pos = pos;

  return true;
};

// Alternative implementation, for memory.
//
// It costs 10% of performance, but allows extend terminators list, if place it
// to `ParcerInline` property. Probably, will switch to it sometime, such
// flexibility required.

/*
var TERMINATOR_RE = /[\n!#$%&*+\-:<=>@[\\\]^_`{}~]/;

module.exports = function text(state, silent) {
  var pos = state.pos,
      idx = state.src.slice(pos).search(TERMINATOR_RE);

  // first char is terminator -> empty text
  if (idx === 0) { return false; }

  // no terminator -> text till end of string
  if (idx < 0) {
    if (!silent) { state.pending += state.src.slice(pos); }
    state.pos = state.src.length;
    return true;
  }

  if (!silent) { state.pending += state.src.slice(pos, pos + idx); }

  state.pos += idx;

  return true;
};*/

},{}],50:[function(require,module,exports){
// Merge adjacent text nodes into one, and re-calculate all token levels
//
'use strict';


module.exports = function text_collapse(state) {
  var curr, last,
      level = 0,
      tokens = state.tokens,
      max = state.tokens.length;

  for (curr = last = 0; curr < max; curr++) {
    // re-calculate levels
    level += tokens[curr].nesting;
    tokens[curr].level = level;

    if (tokens[curr].type === 'text' &&
        curr + 1 < max &&
        tokens[curr + 1].type === 'text') {

      // collapse two adjacent text nodes
      tokens[curr + 1].content = tokens[curr].content + tokens[curr + 1].content;
    } else {
      if (curr !== last) { tokens[last] = tokens[curr]; }

      last++;
    }
  }

  if (curr !== last) {
    tokens.length = last;
  }
};

},{}],51:[function(require,module,exports){
// Token class

'use strict';


/**
 * class Token
 **/

/**
 * new Token(type, tag, nesting)
 *
 * Create new token and fill passed properties.
 **/
function Token(type, tag, nesting) {
  /**
   * Token#type -> String
   *
   * Type of the token (string, e.g. "paragraph_open")
   **/
  this.type     = type;

  /**
   * Token#tag -> String
   *
   * html tag name, e.g. "p"
   **/
  this.tag      = tag;

  /**
   * Token#attrs -> Array
   *
   * Html attributes. Format: `[ [ name1, value1 ], [ name2, value2 ] ]`
   **/
  this.attrs    = null;

  /**
   * Token#map -> Array
   *
   * Source map info. Format: `[ line_begin, line_end ]`
   **/
  this.map      = null;

  /**
   * Token#nesting -> Number
   *
   * Level change (number in {-1, 0, 1} set), where:
   *
   * -  `1` means the tag is opening
   * -  `0` means the tag is self-closing
   * - `-1` means the tag is closing
   **/
  this.nesting  = nesting;

  /**
   * Token#level -> Number
   *
   * nesting level, the same as `state.level`
   **/
  this.level    = 0;

  /**
   * Token#children -> Array
   *
   * An array of child nodes (inline and img tokens)
   **/
  this.children = null;

  /**
   * Token#content -> String
   *
   * In a case of self-closing tag (code, html, fence, etc.),
   * it has contents of this tag.
   **/
  this.content  = '';

  /**
   * Token#markup -> String
   *
   * '*' or '_' for emphasis, fence string for fence, etc.
   **/
  this.markup   = '';

  /**
   * Token#info -> String
   *
   * fence infostring
   **/
  this.info     = '';

  /**
   * Token#meta -> Object
   *
   * A place for plugins to store an arbitrary data
   **/
  this.meta     = null;

  /**
   * Token#block -> Boolean
   *
   * True for block-level tokens, false for inline tokens.
   * Used in renderer to calculate line breaks
   **/
  this.block    = false;

  /**
   * Token#hidden -> Boolean
   *
   * If it's true, ignore this element when rendering. Used for tight lists
   * to hide paragraphs.
   **/
  this.hidden   = false;
}


/**
 * Token.attrIndex(name) -> Number
 *
 * Search attribute index by name.
 **/
Token.prototype.attrIndex = function attrIndex(name) {
  var attrs, i, len;

  if (!this.attrs) { return -1; }

  attrs = this.attrs;

  for (i = 0, len = attrs.length; i < len; i++) {
    if (attrs[i][0] === name) { return i; }
  }
  return -1;
};


/**
 * Token.attrPush(attrData)
 *
 * Add `[ name, value ]` attribute to list. Init attrs if necessary
 **/
Token.prototype.attrPush = function attrPush(attrData) {
  if (this.attrs) {
    this.attrs.push(attrData);
  } else {
    this.attrs = [ attrData ];
  }
};


/**
 * Token.attrSet(name, value)
 *
 * Set `name` attribute to `value`. Override old value if exists.
 **/
Token.prototype.attrSet = function attrSet(name, value) {
  var idx = this.attrIndex(name),
      attrData = [ name, value ];

  if (idx < 0) {
    this.attrPush(attrData);
  } else {
    this.attrs[idx] = attrData;
  }
};


/**
 * Token.attrGet(name)
 *
 * Get the value of attribute `name`, or null if it does not exist.
 **/
Token.prototype.attrGet = function attrGet(name) {
  var idx = this.attrIndex(name), value = null;
  if (idx >= 0) {
    value = this.attrs[idx][1];
  }
  return value;
};


/**
 * Token.attrJoin(name, value)
 *
 * Join value to existing attribute via space. Or create new attribute if not
 * exists. Useful to operate with token classes.
 **/
Token.prototype.attrJoin = function attrJoin(name, value) {
  var idx = this.attrIndex(name);

  if (idx < 0) {
    this.attrPush([ name, value ]);
  } else {
    this.attrs[idx][1] = this.attrs[idx][1] + ' ' + value;
  }
};


module.exports = Token;

},{}],52:[function(require,module,exports){
module.exports={"Aacute":"\u00C1","aacute":"\u00E1","Abreve":"\u0102","abreve":"\u0103","ac":"\u223E","acd":"\u223F","acE":"\u223E\u0333","Acirc":"\u00C2","acirc":"\u00E2","acute":"\u00B4","Acy":"\u0410","acy":"\u0430","AElig":"\u00C6","aelig":"\u00E6","af":"\u2061","Afr":"\uD835\uDD04","afr":"\uD835\uDD1E","Agrave":"\u00C0","agrave":"\u00E0","alefsym":"\u2135","aleph":"\u2135","Alpha":"\u0391","alpha":"\u03B1","Amacr":"\u0100","amacr":"\u0101","amalg":"\u2A3F","amp":"&","AMP":"&","andand":"\u2A55","And":"\u2A53","and":"\u2227","andd":"\u2A5C","andslope":"\u2A58","andv":"\u2A5A","ang":"\u2220","ange":"\u29A4","angle":"\u2220","angmsdaa":"\u29A8","angmsdab":"\u29A9","angmsdac":"\u29AA","angmsdad":"\u29AB","angmsdae":"\u29AC","angmsdaf":"\u29AD","angmsdag":"\u29AE","angmsdah":"\u29AF","angmsd":"\u2221","angrt":"\u221F","angrtvb":"\u22BE","angrtvbd":"\u299D","angsph":"\u2222","angst":"\u00C5","angzarr":"\u237C","Aogon":"\u0104","aogon":"\u0105","Aopf":"\uD835\uDD38","aopf":"\uD835\uDD52","apacir":"\u2A6F","ap":"\u2248","apE":"\u2A70","ape":"\u224A","apid":"\u224B","apos":"'","ApplyFunction":"\u2061","approx":"\u2248","approxeq":"\u224A","Aring":"\u00C5","aring":"\u00E5","Ascr":"\uD835\uDC9C","ascr":"\uD835\uDCB6","Assign":"\u2254","ast":"*","asymp":"\u2248","asympeq":"\u224D","Atilde":"\u00C3","atilde":"\u00E3","Auml":"\u00C4","auml":"\u00E4","awconint":"\u2233","awint":"\u2A11","backcong":"\u224C","backepsilon":"\u03F6","backprime":"\u2035","backsim":"\u223D","backsimeq":"\u22CD","Backslash":"\u2216","Barv":"\u2AE7","barvee":"\u22BD","barwed":"\u2305","Barwed":"\u2306","barwedge":"\u2305","bbrk":"\u23B5","bbrktbrk":"\u23B6","bcong":"\u224C","Bcy":"\u0411","bcy":"\u0431","bdquo":"\u201E","becaus":"\u2235","because":"\u2235","Because":"\u2235","bemptyv":"\u29B0","bepsi":"\u03F6","bernou":"\u212C","Bernoullis":"\u212C","Beta":"\u0392","beta":"\u03B2","beth":"\u2136","between":"\u226C","Bfr":"\uD835\uDD05","bfr":"\uD835\uDD1F","bigcap":"\u22C2","bigcirc":"\u25EF","bigcup":"\u22C3","bigodot":"\u2A00","bigoplus":"\u2A01","bigotimes":"\u2A02","bigsqcup":"\u2A06","bigstar":"\u2605","bigtriangledown":"\u25BD","bigtriangleup":"\u25B3","biguplus":"\u2A04","bigvee":"\u22C1","bigwedge":"\u22C0","bkarow":"\u290D","blacklozenge":"\u29EB","blacksquare":"\u25AA","blacktriangle":"\u25B4","blacktriangledown":"\u25BE","blacktriangleleft":"\u25C2","blacktriangleright":"\u25B8","blank":"\u2423","blk12":"\u2592","blk14":"\u2591","blk34":"\u2593","block":"\u2588","bne":"=\u20E5","bnequiv":"\u2261\u20E5","bNot":"\u2AED","bnot":"\u2310","Bopf":"\uD835\uDD39","bopf":"\uD835\uDD53","bot":"\u22A5","bottom":"\u22A5","bowtie":"\u22C8","boxbox":"\u29C9","boxdl":"\u2510","boxdL":"\u2555","boxDl":"\u2556","boxDL":"\u2557","boxdr":"\u250C","boxdR":"\u2552","boxDr":"\u2553","boxDR":"\u2554","boxh":"\u2500","boxH":"\u2550","boxhd":"\u252C","boxHd":"\u2564","boxhD":"\u2565","boxHD":"\u2566","boxhu":"\u2534","boxHu":"\u2567","boxhU":"\u2568","boxHU":"\u2569","boxminus":"\u229F","boxplus":"\u229E","boxtimes":"\u22A0","boxul":"\u2518","boxuL":"\u255B","boxUl":"\u255C","boxUL":"\u255D","boxur":"\u2514","boxuR":"\u2558","boxUr":"\u2559","boxUR":"\u255A","boxv":"\u2502","boxV":"\u2551","boxvh":"\u253C","boxvH":"\u256A","boxVh":"\u256B","boxVH":"\u256C","boxvl":"\u2524","boxvL":"\u2561","boxVl":"\u2562","boxVL":"\u2563","boxvr":"\u251C","boxvR":"\u255E","boxVr":"\u255F","boxVR":"\u2560","bprime":"\u2035","breve":"\u02D8","Breve":"\u02D8","brvbar":"\u00A6","bscr":"\uD835\uDCB7","Bscr":"\u212C","bsemi":"\u204F","bsim":"\u223D","bsime":"\u22CD","bsolb":"\u29C5","bsol":"\\","bsolhsub":"\u27C8","bull":"\u2022","bullet":"\u2022","bump":"\u224E","bumpE":"\u2AAE","bumpe":"\u224F","Bumpeq":"\u224E","bumpeq":"\u224F","Cacute":"\u0106","cacute":"\u0107","capand":"\u2A44","capbrcup":"\u2A49","capcap":"\u2A4B","cap":"\u2229","Cap":"\u22D2","capcup":"\u2A47","capdot":"\u2A40","CapitalDifferentialD":"\u2145","caps":"\u2229\uFE00","caret":"\u2041","caron":"\u02C7","Cayleys":"\u212D","ccaps":"\u2A4D","Ccaron":"\u010C","ccaron":"\u010D","Ccedil":"\u00C7","ccedil":"\u00E7","Ccirc":"\u
},{}],53:[function(require,module,exports){
'use strict';


////////////////////////////////////////////////////////////////////////////////
// Helpers

// Merge objects
//
function assign(obj /*from1, from2, from3, ...*/) {
  var sources = Array.prototype.slice.call(arguments, 1);

  sources.forEach(function (source) {
    if (!source) { return; }

    Object.keys(source).forEach(function (key) {
      obj[key] = source[key];
    });
  });

  return obj;
}

function _class(obj) { return Object.prototype.toString.call(obj); }
function isString(obj) { return _class(obj) === '[object String]'; }
function isObject(obj) { return _class(obj) === '[object Object]'; }
function isRegExp(obj) { return _class(obj) === '[object RegExp]'; }
function isFunction(obj) { return _class(obj) === '[object Function]'; }


function escapeRE(str) { return str.replace(/[.?*+^$[\]\\(){}|-]/g, '\\$&'); }

////////////////////////////////////////////////////////////////////////////////


var defaultOptions = {
  fuzzyLink: true,
  fuzzyEmail: true,
  fuzzyIP: false
};


function isOptionsObj(obj) {
  return Object.keys(obj || {}).reduce(function (acc, k) {
    return acc || defaultOptions.hasOwnProperty(k);
  }, false);
}


var defaultSchemas = {
  'http:': {
    validate: function (text, pos, self) {
      var tail = text.slice(pos);

      if (!self.re.http) {
        // compile lazily, because "host"-containing variables can change on tlds update.
        self.re.http =  new RegExp(
          '^\\/\\/' + self.re.src_auth + self.re.src_host_port_strict + self.re.src_path, 'i'
        );
      }
      if (self.re.http.test(tail)) {
        return tail.match(self.re.http)[0].length;
      }
      return 0;
    }
  },
  'https:':  'http:',
  'ftp:':    'http:',
  '//':      {
    validate: function (text, pos, self) {
      var tail = text.slice(pos);

      if (!self.re.no_http) {
      // compile lazily, because "host"-containing variables can change on tlds update.
        self.re.no_http =  new RegExp(
          '^' +
          self.re.src_auth +
          // Don't allow single-level domains, because of false positives like '//test'
          // with code comments
          '(?:localhost|(?:(?:' + self.re.src_domain + ')\\.)+' + self.re.src_domain_root + ')' +
          self.re.src_port +
          self.re.src_host_terminator +
          self.re.src_path,

          'i'
        );
      }

      if (self.re.no_http.test(tail)) {
        // should not be `://` & `///`, that protects from errors in protocol name
        if (pos >= 3 && text[pos - 3] === ':') { return 0; }
        if (pos >= 3 && text[pos - 3] === '/') { return 0; }
        return tail.match(self.re.no_http)[0].length;
      }
      return 0;
    }
  },
  'mailto:': {
    validate: function (text, pos, self) {
      var tail = text.slice(pos);

      if (!self.re.mailto) {
        self.re.mailto =  new RegExp(
          '^' + self.re.src_email_name + '@' + self.re.src_host_strict, 'i'
        );
      }
      if (self.re.mailto.test(tail)) {
        return tail.match(self.re.mailto)[0].length;
      }
      return 0;
    }
  }
};

/*eslint-disable max-len*/

// RE pattern for 2-character tlds (autogenerated by ./support/tlds_2char_gen.js)
var tlds_2ch_src_re = 'a[cdefgilmnoqrstuwxz]|b[abdefghijmnorstvwyz]|c[acdfghiklmnoruvwxyz]|d[ejkmoz]|e[cegrstu]|f[ijkmor]|g[abdefghilmnpqrstuwy]|h[kmnrtu]|i[delmnoqrst]|j[emop]|k[eghimnprwyz]|l[abcikrstuvy]|m[acdeghklmnopqrstuvwxyz]|n[acefgilopruz]|om|p[aefghklmnrstwy]|qa|r[eosuw]|s[abcdeghijklmnortuvxyz]|t[cdfghjklmnortvwz]|u[agksyz]|v[aceginu]|w[fs]|y[et]|z[amw]';

// DON'T try to make PRs with changes. Extend TLDs with LinkifyIt.tlds() instead
var tlds_default = 'biz|com|edu|gov|net|org|pro|web|xxx|aero|asia|coop|info|museum|name|shop|рф'.split('|');

/*eslint-enable max-len*/

////////////////////////////////////////////////////////////////////////////////

function resetScanCache(self) {
  self.__index__ = -1;
  self.__text_cache__   = '';
}

function createValidator(re) {
  return function (text, pos) {
    var tail = text.slice(pos);

    if (re.test(tail)) {
      return tail.match(re)[0].length;
    }
    return 0;
  };
}

function createNormalizer() {
  return function (match, self) {
    self.normalize(match);
  };
}

// Schemas compiler. Build regexps.
//
function compile(self) {

  // Load & clone RE patterns.
  var re = self.re = require('./lib/re')(self.__opts__);

  // Define dynamic patterns
  var tlds = self.__tlds__.slice();

  self.onCompile();

  if (!self.__tlds_replaced__) {
    tlds.push(tlds_2ch_src_re);
  }
  tlds.push(re.src_xn);

  re.src_tlds = tlds.join('|');

  function untpl(tpl) { return tpl.replace('%TLDS%', re.src_tlds); }

  re.email_fuzzy      = RegExp(untpl(re.tpl_email_fuzzy), 'i');
  re.link_fuzzy       = RegExp(untpl(re.tpl_link_fuzzy), 'i');
  re.link_no_ip_fuzzy = RegExp(untpl(re.tpl_link_no_ip_fuzzy), 'i');
  re.host_fuzzy_test  = RegExp(untpl(re.tpl_host_fuzzy_test), 'i');

  //
  // Compile each schema
  //

  var aliases = [];

  self.__compiled__ = {}; // Reset compiled data

  function schemaError(name, val) {
    throw new Error('(LinkifyIt) Invalid schema "' + name + '": ' + val);
  }

  Object.keys(self.__schemas__).forEach(function (name) {
    var val = self.__schemas__[name];

    // skip disabled methods
    if (val === null) { return; }

    var compiled = { validate: null, link: null };

    self.__compiled__[name] = compiled;

    if (isObject(val)) {
      if (isRegExp(val.validate)) {
        compiled.validate = createValidator(val.validate);
      } else if (isFunction(val.validate)) {
        compiled.validate = val.validate;
      } else {
        schemaError(name, val);
      }

      if (isFunction(val.normalize)) {
        compiled.normalize = val.normalize;
      } else if (!val.normalize) {
        compiled.normalize = createNormalizer();
      } else {
        schemaError(name, val);
      }

      return;
    }

    if (isString(val)) {
      aliases.push(name);
      return;
    }

    schemaError(name, val);
  });

  //
  // Compile postponed aliases
  //

  aliases.forEach(function (alias) {
    if (!self.__compiled__[self.__schemas__[alias]]) {
      // Silently fail on missed schemas to avoid errons on disable.
      // schemaError(alias, self.__schemas__[alias]);
      return;
    }

    self.__compiled__[alias].validate =
      self.__compiled__[self.__schemas__[alias]].validate;
    self.__compiled__[alias].normalize =
      self.__compiled__[self.__schemas__[alias]].normalize;
  });

  //
  // Fake record for guessed links
  //
  self.__compiled__[''] = { validate: null, normalize: createNormalizer() };

  //
  // Build schema condition
  //
  var slist = Object.keys(self.__compiled__)
                      .filter(function (name) {
                        // Filter disabled & fake schemas
                        return name.length > 0 && self.__compiled__[name];
                      })
                      .map(escapeRE)
                      .join('|');
  // (?!_) cause 1.5x slowdown
  self.re.schema_test   = RegExp('(^|(?!_)(?:[><\uff5c]|' + re.src_ZPCc + '))(' + slist + ')', 'i');
  self.re.schema_search = RegExp('(^|(?!_)(?:[><\uff5c]|' + re.src_ZPCc + '))(' + slist + ')', 'ig');

  self.re.pretest       = RegExp(
                            '(' + self.re.schema_test.source + ')|' +
                            '(' + self.re.host_fuzzy_test.source + ')|' +
                            '@',
                            'i');

  //
  // Cleanup
  //

  resetScanCache(self);
}

/**
 * class Match
 *
 * Match result. Single element of array, returned by [[LinkifyIt#match]]
 **/
function Match(self, shift) {
  var start = self.__index__,
      end   = self.__last_index__,
      text  = self.__text_cache__.slice(start, end);

  /**
   * Match#schema -> String
   *
   * Prefix (protocol) for matched string.
   **/
  this.schema    = self.__schema__.toLowerCase();
  /**
   * Match#index -> Number
   *
   * First position of matched string.
   **/
  this.index     = start + shift;
  /**
   * Match#lastIndex -> Number
   *
   * Next position after matched string.
   **/
  this.lastIndex = end + shift;
  /**
   * Match#raw -> String
   *
   * Matched string.
   **/
  this.raw       = text;
  /**
   * Match#text -> String
   *
   * Notmalized text of matched string.
   **/
  this.text      = text;
  /**
   * Match#url -> String
   *
   * Normalized url of matched string.
   **/
  this.url       = text;
}

function createMatch(self, shift) {
  var match = new Match(self, shift);

  self.__compiled__[match.schema].normalize(match, self);

  return match;
}


/**
 * class LinkifyIt
 **/

/**
 * new LinkifyIt(schemas, options)
 * - schemas (Object): Optional. Additional schemas to validate (prefix/validator)
 * - options (Object): { fuzzyLink|fuzzyEmail|fuzzyIP: true|false }
 *
 * Creates new linkifier instance with optional additional schemas.
 * Can be called without `new` keyword for convenience.
 *
 * By default understands:
 *
 * - `http(s)://...` , `ftp://...`, `mailto:...` & `//...` links
 * - "fuzzy" links and emails (example.com, foo@bar.com).
 *
 * `schemas` is an object, where each key/value describes protocol/rule:
 *
 * - __key__ - link prefix (usually, protocol name with `:` at the end, `skype:`
 *   for example). `linkify-it` makes shure that prefix is not preceeded with
 *   alphanumeric char and symbols. Only whitespaces and punctuation allowed.
 * - __value__ - rule to check tail after link prefix
 *   - _String_ - just alias to existing rule
 *   - _Object_
 *     - _validate_ - validator function (should return matched length on success),
 *       or `RegExp`.
 *     - _normalize_ - optional function to normalize text & url of matched result
 *       (for example, for @twitter mentions).
 *
 * `options`:
 *
 * - __fuzzyLink__ - recognige URL-s without `http(s):` prefix. Default `true`.
 * - __fuzzyIP__ - allow IPs in fuzzy links above. Can conflict with some texts
 *   like version numbers. Default `false`.
 * - __fuzzyEmail__ - recognize emails without `mailto:` prefix.
 *
 **/
function LinkifyIt(schemas, options) {
  if (!(this instanceof LinkifyIt)) {
    return new LinkifyIt(schemas, options);
  }

  if (!options) {
    if (isOptionsObj(schemas)) {
      options = schemas;
      schemas = {};
    }
  }

  this.__opts__           = assign({}, defaultOptions, options);

  // Cache last tested result. Used to skip repeating steps on next `match` call.
  this.__index__          = -1;
  this.__last_index__     = -1; // Next scan position
  this.__schema__         = '';
  this.__text_cache__     = '';

  this.__schemas__        = assign({}, defaultSchemas, schemas);
  this.__compiled__       = {};

  this.__tlds__           = tlds_default;
  this.__tlds_replaced__  = false;

  this.re = {};

  compile(this);
}


/** chainable
 * LinkifyIt#add(schema, definition)
 * - schema (String): rule name (fixed pattern prefix)
 * - definition (String|RegExp|Object): schema definition
 *
 * Add new rule definition. See constructor description for details.
 **/
LinkifyIt.prototype.add = function add(schema, definition) {
  this.__schemas__[schema] = definition;
  compile(this);
  return this;
};


/** chainable
 * LinkifyIt#set(options)
 * - options (Object): { fuzzyLink|fuzzyEmail|fuzzyIP: true|false }
 *
 * Set recognition options for links without schema.
 **/
LinkifyIt.prototype.set = function set(options) {
  this.__opts__ = assign(this.__opts__, options);
  return this;
};


/**
 * LinkifyIt#test(text) -> Boolean
 *
 * Searches linkifiable pattern and returns `true` on success or `false` on fail.
 **/
LinkifyIt.prototype.test = function test(text) {
  // Reset scan cache
  this.__text_cache__ = text;
  this.__index__      = -1;

  if (!text.length) { return false; }

  var m, ml, me, len, shift, next, re, tld_pos, at_pos;

  // try to scan for link with schema - that's the most simple rule
  if (this.re.schema_test.test(text)) {
    re = this.re.schema_search;
    re.lastIndex = 0;
    while ((m = re.exec(text)) !== null) {
      len = this.testSchemaAt(text, m[2], re.lastIndex);
      if (len) {
        this.__schema__     = m[2];
        this.__index__      = m.index + m[1].length;
        this.__last_index__ = m.index + m[0].length + len;
        break;
      }
    }
  }

  if (this.__opts__.fuzzyLink && this.__compiled__['http:']) {
    // guess schemaless links
    tld_pos = text.search(this.re.host_fuzzy_test);
    if (tld_pos >= 0) {
      // if tld is located after found link - no need to check fuzzy pattern
      if (this.__index__ < 0 || tld_pos < this.__index__) {
        if ((ml = text.match(this.__opts__.fuzzyIP ? this.re.link_fuzzy : this.re.link_no_ip_fuzzy)) !== null) {

          shift = ml.index + ml[1].length;

          if (this.__index__ < 0 || shift < this.__index__) {
            this.__schema__     = '';
            this.__index__      = shift;
            this.__last_index__ = ml.index + ml[0].length;
          }
        }
      }
    }
  }

  if (this.__opts__.fuzzyEmail && this.__compiled__['mailto:']) {
    // guess schemaless emails
    at_pos = text.indexOf('@');
    if (at_pos >= 0) {
      // We can't skip this check, because this cases are possible:
      // 192.168.1.1@gmail.com, my.in@example.com
      if ((me = text.match(this.re.email_fuzzy)) !== null) {

        shift = me.index + me[1].length;
        next  = me.index + me[0].length;

        if (this.__index__ < 0 || shift < this.__index__ ||
            (shift === this.__index__ && next > this.__last_index__)) {
          this.__schema__     = 'mailto:';
          this.__index__      = shift;
          this.__last_index__ = next;
        }
      }
    }
  }

  return this.__index__ >= 0;
};


/**
 * LinkifyIt#pretest(text) -> Boolean
 *
 * Very quick check, that can give false positives. Returns true if link MAY BE
 * can exists. Can be used for speed optimization, when you need to check that
 * link NOT exists.
 **/
LinkifyIt.prototype.pretest = function pretest(text) {
  return this.re.pretest.test(text);
};


/**
 * LinkifyIt#testSchemaAt(text, name, position) -> Number
 * - text (String): text to scan
 * - name (String): rule (schema) name
 * - position (Number): text offset to check from
 *
 * Similar to [[LinkifyIt#test]] but checks only specific protocol tail exactly
 * at given position. Returns length of found pattern (0 on fail).
 **/
LinkifyIt.prototype.testSchemaAt = function testSchemaAt(text, schema, pos) {
  // If not supported schema check requested - terminate
  if (!this.__compiled__[schema.toLowerCase()]) {
    return 0;
  }
  return this.__compiled__[schema.toLowerCase()].validate(text, pos, this);
};


/**
 * LinkifyIt#match(text) -> Array|null
 *
 * Returns array of found link descriptions or `null` on fail. We strongly
 * recommend to use [[LinkifyIt#test]] first, for best speed.
 *
 * ##### Result match description
 *
 * - __schema__ - link schema, can be empty for fuzzy links, or `//` for
 *   protocol-neutral  links.
 * - __index__ - offset of matched text
 * - __lastIndex__ - index of next char after mathch end
 * - __raw__ - matched text
 * - __text__ - normalized text
 * - __url__ - link, generated from matched text
 **/
LinkifyIt.prototype.match = function match(text) {
  var shift = 0, result = [];

  // Try to take previous element from cache, if .test() called before
  if (this.__index__ >= 0 && this.__text_cache__ === text) {
    result.push(createMatch(this, shift));
    shift = this.__last_index__;
  }

  // Cut head if cache was used
  var tail = shift ? text.slice(shift) : text;

  // Scan string until end reached
  while (this.test(tail)) {
    result.push(createMatch(this, shift));

    tail = tail.slice(this.__last_index__);
    shift += this.__last_index__;
  }

  if (result.length) {
    return result;
  }

  return null;
};


/** chainable
 * LinkifyIt#tlds(list [, keepOld]) -> this
 * - list (Array): list of tlds
 * - keepOld (Boolean): merge with current list if `true` (`false` by default)
 *
 * Load (or merge) new tlds list. Those are user for fuzzy links (without prefix)
 * to avoid false positives. By default this algorythm used:
 *
 * - hostname with any 2-letter root zones are ok.
 * - biz|com|edu|gov|net|org|pro|web|xxx|aero|asia|coop|info|museum|name|shop|рф
 *   are ok.
 * - encoded (`xn--...`) root zones are ok.
 *
 * If list is replaced, then exact match for 2-chars root zones will be checked.
 **/
LinkifyIt.prototype.tlds = function tlds(list, keepOld) {
  list = Array.isArray(list) ? list : [ list ];

  if (!keepOld) {
    this.__tlds__ = list.slice();
    this.__tlds_replaced__ = true;
    compile(this);
    return this;
  }

  this.__tlds__ = this.__tlds__.concat(list)
                                  .sort()
                                  .filter(function (el, idx, arr) {
                                    return el !== arr[idx - 1];
                                  })
                                  .reverse();

  compile(this);
  return this;
};

/**
 * LinkifyIt#normalize(match)
 *
 * Default normalizer (if schema does not define it's own).
 **/
LinkifyIt.prototype.normalize = function normalize(match) {

  // Do minimal possible changes by default. Need to collect feedback prior
  // to move forward https://github.com/markdown-it/linkify-it/issues/1

  if (!match.schema) { match.url = 'http://' + match.url; }

  if (match.schema === 'mailto:' && !/^mailto:/i.test(match.url)) {
    match.url = 'mailto:' + match.url;
  }
};


/**
 * LinkifyIt#onCompile()
 *
 * Override to modify basic RegExp-s.
 **/
LinkifyIt.prototype.onCompile = function onCompile() {
};


module.exports = LinkifyIt;

},{"./lib/re":54}],54:[function(require,module,exports){
'use strict';


module.exports = function (opts) {
  var re = {};

  // Use direct extract instead of `regenerate` to reduse browserified size
  re.src_Any = require('uc.micro/properties/Any/regex').source;
  re.src_Cc  = require('uc.micro/categories/Cc/regex').source;
  re.src_Z   = require('uc.micro/categories/Z/regex').source;
  re.src_P   = require('uc.micro/categories/P/regex').source;

  // \p{\Z\P\Cc\CF} (white spaces + control + format + punctuation)
  re.src_ZPCc = [ re.src_Z, re.src_P, re.src_Cc ].join('|');

  // \p{\Z\Cc} (white spaces + control)
  re.src_ZCc = [ re.src_Z, re.src_Cc ].join('|');

  // Experimental. List of chars, completely prohibited in links
  // because can separate it from other part of text
  var text_separators = '[><\uff5c]';

  // All possible word characters (everything without punctuation, spaces & controls)
  // Defined via punctuation & spaces to save space
  // Should be something like \p{\L\N\S\M} (\w but without `_`)
  re.src_pseudo_letter       = '(?:(?!' + text_separators + '|' + re.src_ZPCc + ')' + re.src_Any + ')';
  // The same as abothe but without [0-9]
  // var src_pseudo_letter_non_d = '(?:(?![0-9]|' + src_ZPCc + ')' + src_Any + ')';

  ////////////////////////////////////////////////////////////////////////////////

  re.src_ip4 =

    '(?:(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)';

  // Prohibit any of "@/[]()" in user/pass to avoid wrong domain fetch.
  re.src_auth    = '(?:(?:(?!' + re.src_ZCc + '|[@/\\[\\]()]).)+@)?';

  re.src_port =

    '(?::(?:6(?:[0-4]\\d{3}|5(?:[0-4]\\d{2}|5(?:[0-2]\\d|3[0-5])))|[1-5]?\\d{1,4}))?';

  re.src_host_terminator =

    '(?=$|' + text_separators + '|' + re.src_ZPCc + ')(?!-|_|:\\d|\\.-|\\.(?!$|' + re.src_ZPCc + '))';

  re.src_path =

    '(?:' +
      '[/?#]' +
        '(?:' +
          '(?!' + re.src_ZCc + '|' + text_separators + '|[()[\\]{}.,"\'?!\\-]).|' +
          '\\[(?:(?!' + re.src_ZCc + '|\\]).)*\\]|' +
          '\\((?:(?!' + re.src_ZCc + '|[)]).)*\\)|' +
          '\\{(?:(?!' + re.src_ZCc + '|[}]).)*\\}|' +
          '\\"(?:(?!' + re.src_ZCc + '|["]).)+\\"|' +
          "\\'(?:(?!" + re.src_ZCc + "|[']).)+\\'|" +
          "\\'(?=" + re.src_pseudo_letter + '|[-]).|' +  // allow `I'm_king` if no pair found
          '\\.{2,3}[a-zA-Z0-9%/]|' + // github has ... in commit range links. Restrict to
                                     // - english
                                     // - percent-encoded
                                     // - parts of file path
                                     // until more examples found.
          '\\.(?!' + re.src_ZCc + '|[.]).|' +
          (opts && opts['---'] ?
            '\\-(?!--(?:[^-]|$))(?:-*)|' // `---` => long dash, terminate
          :
            '\\-+|'
          ) +
          '\\,(?!' + re.src_ZCc + ').|' +      // allow `,,,` in paths
          '\\!(?!' + re.src_ZCc + '|[!]).|' +
          '\\?(?!' + re.src_ZCc + '|[?]).' +
        ')+' +
      '|\\/' +
    ')?';

  re.src_email_name =

    '[\\-;:&=\\+\\$,\\"\\.a-zA-Z0-9_]+';

  re.src_xn =

    'xn--[a-z0-9\\-]{1,59}';

  // More to read about domain names
  // http://serverfault.com/questions/638260/

  re.src_domain_root =

    // Allow letters & digits (http://test1)
    '(?:' +
      re.src_xn +
      '|' +
      re.src_pseudo_letter + '{1,63}' +
    ')';

  re.src_domain =

    '(?:' +
      re.src_xn +
      '|' +
      '(?:' + re.src_pseudo_letter + ')' +
      '|' +
      // don't allow `--` in domain names, because:
      // - that can conflict with markdown &mdash; / &ndash;
      // - nobody use those anyway
      '(?:' + re.src_pseudo_letter + '(?:-(?!-)|' + re.src_pseudo_letter + '){0,61}' + re.src_pseudo_letter + ')' +
    ')';

  re.src_host =

    '(?:' +
    // Don't need IP check, because digits are already allowed in normal domain names
    //   src_ip4 +
    // '|' +
      '(?:(?:(?:' + re.src_domain + ')\\.)*' + re.src_domain/*_root*/ + ')' +
    ')';

  re.tpl_host_fuzzy =

    '(?:' +
      re.src_ip4 +
    '|' +
      '(?:(?:(?:' + re.src_domain + ')\\.)+(?:%TLDS%))' +
    ')';

  re.tpl_host_no_ip_fuzzy =

    '(?:(?:(?:' + re.src_domain + ')\\.)+(?:%TLDS%))';

  re.src_host_strict =

    re.src_host + re.src_host_terminator;

  re.tpl_host_fuzzy_strict =

    re.tpl_host_fuzzy + re.src_host_terminator;

  re.src_host_port_strict =

    re.src_host + re.src_port + re.src_host_terminator;

  re.tpl_host_port_fuzzy_strict =

    re.tpl_host_fuzzy + re.src_port + re.src_host_terminator;

  re.tpl_host_port_no_ip_fuzzy_strict =

    re.tpl_host_no_ip_fuzzy + re.src_port + re.src_host_terminator;


  ////////////////////////////////////////////////////////////////////////////////
  // Main rules

  // Rude test fuzzy links by host, for quick deny
  re.tpl_host_fuzzy_test =

    'localhost|www\\.|\\.\\d{1,3}\\.|(?:\\.(?:%TLDS%)(?:' + re.src_ZPCc + '|>|$))';

  re.tpl_email_fuzzy =

      '(^|' + text_separators + '|\\(|' + re.src_ZCc + ')(' + re.src_email_name + '@' + re.tpl_host_fuzzy_strict + ')';

  re.tpl_link_fuzzy =
      // Fuzzy link can't be prepended with .:/\- and non punctuation.
      // but can start with > (markdown blockquote)
      '(^|(?![.:/\\-_@])(?:[$+<=>^`|\uff5c]|' + re.src_ZPCc + '))' +
      '((?![$+<=>^`|\uff5c])' + re.tpl_host_port_fuzzy_strict + re.src_path + ')';

  re.tpl_link_no_ip_fuzzy =
      // Fuzzy link can't be prepended with .:/\- and non punctuation.
      // but can start with > (markdown blockquote)
      '(^|(?![.:/\\-_@])(?:[$+<=>^`|\uff5c]|' + re.src_ZPCc + '))' +
      '((?![$+<=>^`|\uff5c])' + re.tpl_host_port_no_ip_fuzzy_strict + re.src_path + ')';

  return re;
};

},{"uc.micro/categories/Cc/regex":61,"uc.micro/categories/P/regex":63,"uc.micro/categories/Z/regex":64,"uc.micro/properties/Any/regex":66}],55:[function(require,module,exports){

'use strict';


/* eslint-disable no-bitwise */

var decodeCache = {};

function getDecodeCache(exclude) {
  var i, ch, cache = decodeCache[exclude];
  if (cache) { return cache; }

  cache = decodeCache[exclude] = [];

  for (i = 0; i < 128; i++) {
    ch = String.fromCharCode(i);
    cache.push(ch);
  }

  for (i = 0; i < exclude.length; i++) {
    ch = exclude.charCodeAt(i);
    cache[ch] = '%' + ('0' + ch.toString(16).toUpperCase()).slice(-2);
  }

  return cache;
}


// Decode percent-encoded string.
//
function decode(string, exclude) {
  var cache;

  if (typeof exclude !== 'string') {
    exclude = decode.defaultChars;
  }

  cache = getDecodeCache(exclude);

  return string.replace(/(%[a-f0-9]{2})+/gi, function(seq) {
    var i, l, b1, b2, b3, b4, chr,
        result = '';

    for (i = 0, l = seq.length; i < l; i += 3) {
      b1 = parseInt(seq.slice(i + 1, i + 3), 16);

      if (b1 < 0x80) {
        result += cache[b1];
        continue;
      }

      if ((b1 & 0xE0) === 0xC0 && (i + 3 < l)) {
        // 110xxxxx 10xxxxxx
        b2 = parseInt(seq.slice(i + 4, i + 6), 16);

        if ((b2 & 0xC0) === 0x80) {
          chr = ((b1 << 6) & 0x7C0) | (b2 & 0x3F);

          if (chr < 0x80) {
            result += '\ufffd\ufffd';
          } else {
            result += String.fromCharCode(chr);
          }

          i += 3;
          continue;
        }
      }

      if ((b1 & 0xF0) === 0xE0 && (i + 6 < l)) {
        // 1110xxxx 10xxxxxx 10xxxxxx
        b2 = parseInt(seq.slice(i + 4, i + 6), 16);
        b3 = parseInt(seq.slice(i + 7, i + 9), 16);

        if ((b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
          chr = ((b1 << 12) & 0xF000) | ((b2 << 6) & 0xFC0) | (b3 & 0x3F);

          if (chr < 0x800 || (chr >= 0xD800 && chr <= 0xDFFF)) {
            result += '\ufffd\ufffd\ufffd';
          } else {
            result += String.fromCharCode(chr);
          }

          i += 6;
          continue;
        }
      }

      if ((b1 & 0xF8) === 0xF0 && (i + 9 < l)) {
        // 111110xx 10xxxxxx 10xxxxxx 10xxxxxx
        b2 = parseInt(seq.slice(i + 4, i + 6), 16);
        b3 = parseInt(seq.slice(i + 7, i + 9), 16);
        b4 = parseInt(seq.slice(i + 10, i + 12), 16);

        if ((b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80 && (b4 & 0xC0) === 0x80) {
          chr = ((b1 << 18) & 0x1C0000) | ((b2 << 12) & 0x3F000) | ((b3 << 6) & 0xFC0) | (b4 & 0x3F);

          if (chr < 0x10000 || chr > 0x10FFFF) {
            result += '\ufffd\ufffd\ufffd\ufffd';
          } else {
            chr -= 0x10000;
            result += String.fromCharCode(0xD800 + (chr >> 10), 0xDC00 + (chr & 0x3FF));
          }

          i += 9;
          continue;
        }
      }

      result += '\ufffd';
    }

    return result;
  });
}


decode.defaultChars   = ';/?:@&=+$,#';
decode.componentChars = '';


module.exports = decode;

},{}],56:[function(require,module,exports){

'use strict';


var encodeCache = {};


// Create a lookup array where anything but characters in `chars` string
// and alphanumeric chars is percent-encoded.
//
function getEncodeCache(exclude) {
  var i, ch, cache = encodeCache[exclude];
  if (cache) { return cache; }

  cache = encodeCache[exclude] = [];

  for (i = 0; i < 128; i++) {
    ch = String.fromCharCode(i);

    if (/^[0-9a-z]$/i.test(ch)) {
      // always allow unencoded alphanumeric characters
      cache.push(ch);
    } else {
      cache.push('%' + ('0' + i.toString(16).toUpperCase()).slice(-2));
    }
  }

  for (i = 0; i < exclude.length; i++) {
    cache[exclude.charCodeAt(i)] = exclude[i];
  }

  return cache;
}


// Encode unsafe characters with percent-encoding, skipping already
// encoded sequences.
//
//  - string       - string to encode
//  - exclude      - list of characters to ignore (in addition to a-zA-Z0-9)
//  - keepEscaped  - don't encode '%' in a correct escape sequence (default: true)
//
function encode(string, exclude, keepEscaped) {
  var i, l, code, nextCode, cache,
      result = '';

  if (typeof exclude !== 'string') {
    // encode(string, keepEscaped)
    keepEscaped  = exclude;
    exclude = encode.defaultChars;
  }

  if (typeof keepEscaped === 'undefined') {
    keepEscaped = true;
  }

  cache = getEncodeCache(exclude);

  for (i = 0, l = string.length; i < l; i++) {
    code = string.charCodeAt(i);

    if (keepEscaped && code === 0x25 /* % */ && i + 2 < l) {
      if (/^[0-9a-f]{2}$/i.test(string.slice(i + 1, i + 3))) {
        result += string.slice(i, i + 3);
        i += 2;
        continue;
      }
    }

    if (code < 128) {
      result += cache[code];
      continue;
    }

    if (code >= 0xD800 && code <= 0xDFFF) {
      if (code >= 0xD800 && code <= 0xDBFF && i + 1 < l) {
        nextCode = string.charCodeAt(i + 1);
        if (nextCode >= 0xDC00 && nextCode <= 0xDFFF) {
          result += encodeURIComponent(string[i] + string[i + 1]);
          i++;
          continue;
        }
      }
      result += '%EF%BF%BD';
      continue;
    }

    result += encodeURIComponent(string[i]);
  }

  return result;
}

encode.defaultChars   = ";/?:@&=+$,-_.!~*'()#";
encode.componentChars = "-_.!~*'()";


module.exports = encode;

},{}],57:[function(require,module,exports){

'use strict';


module.exports = function format(url) {
  var result = '';

  result += url.protocol || '';
  result += url.slashes ? '//' : '';
  result += url.auth ? url.auth + '@' : '';

  if (url.hostname && url.hostname.indexOf(':') !== -1) {
    // ipv6 address
    result += '[' + url.hostname + ']';
  } else {
    result += url.hostname || '';
  }

  result += url.port ? ':' + url.port : '';
  result += url.pathname || '';
  result += url.search || '';
  result += url.hash || '';

  return result;
};

},{}],58:[function(require,module,exports){
'use strict';


module.exports.encode = require('./encode');
module.exports.decode = require('./decode');
module.exports.format = require('./format');
module.exports.parse  = require('./parse');

},{"./decode":55,"./encode":56,"./format":57,"./parse":59}],59:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';

//
// Changes from joyent/node:
//
// 1. No leading slash in paths,
//    e.g. in `url.parse('http://foo?bar')` pathname is ``, not `/`
//
// 2. Backslashes are not replaced with slashes,
//    so `http:\\example.org\` is treated like a relative path
//
// 3. Trailing colon is treated like a part of the path,
//    i.e. in `http://example.org:foo` pathname is `:foo`
//
// 4. Nothing is URL-encoded in the resulting object,
//    (in joyent/node some chars in auth and paths are encoded)
//
// 5. `url.parse()` does not have `parseQueryString` argument
//
// 6. Removed extraneous result properties: `host`, `path`, `query`, etc.,
//    which can be constructed using other parts of the url.
//


function Url() {
  this.protocol = null;
  this.slashes = null;
  this.auth = null;
  this.port = null;
  this.hostname = null;
  this.hash = null;
  this.search = null;
  this.pathname = null;
}

// Reference: RFC 3986, RFC 1808, RFC 2396

// define these here so at least they only have to be
// compiled once on the first module load.
var protocolPattern = /^([a-z0-9.+-]+:)/i,
    portPattern = /:[0-9]*$/,

    // Special case for a simple path URL
    simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/,

    // RFC 2396: characters reserved for delimiting URLs.
    // We actually just auto-escape these.
    delims = [ '<', '>', '"', '`', ' ', '\r', '\n', '\t' ],

    // RFC 2396: characters not allowed for various reasons.
    unwise = [ '{', '}', '|', '\\', '^', '`' ].concat(delims),

    // Allowed by RFCs, but cause of XSS attacks.  Always escape these.
    autoEscape = [ '\'' ].concat(unwise),
    // Characters that are never ever allowed in a hostname.
    // Note that any invalid chars are also handled, but these
    // are the ones that are *expected* to be seen, so we fast-path
    // them.
    nonHostChars = [ '%', '/', '?', ';', '#' ].concat(autoEscape),
    hostEndingChars = [ '/', '?', '#' ],
    hostnameMaxLen = 255,
    hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,
    hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,
    // protocols that can allow "unsafe" and "unwise" chars.
    /* eslint-disable no-script-url */
    // protocols that never have a hostname.
    hostlessProtocol = {
      'javascript': true,
      'javascript:': true
    },
    // protocols that always contain a // bit.
    slashedProtocol = {
      'http': true,
      'https': true,
      'ftp': true,
      'gopher': true,
      'file': true,
      'http:': true,
      'https:': true,
      'ftp:': true,
      'gopher:': true,
      'file:': true
    };
    /* eslint-enable no-script-url */

function urlParse(url, slashesDenoteHost) {
  if (url && url instanceof Url) { return url; }

  var u = new Url();
  u.parse(url, slashesDenoteHost);
  return u;
}

Url.prototype.parse = function(url, slashesDenoteHost) {
  var i, l, lowerProto, hec, slashes,
      rest = url;

  // trim before proceeding.
  // This is to support parse stuff like "  http://foo.com  \n"
  rest = rest.trim();

  if (!slashesDenoteHost && url.split('#').length === 1) {
    // Try fast path regexp
    var simplePath = simplePathPattern.exec(rest);
    if (simplePath) {
      this.pathname = simplePath[1];
      if (simplePath[2]) {
        this.search = simplePath[2];
      }
      return this;
    }
  }

  var proto = protocolPattern.exec(rest);
  if (proto) {
    proto = proto[0];
    lowerProto = proto.toLowerCase();
    this.protocol = proto;
    rest = rest.substr(proto.length);
  }

  // figure out if it's got a host
  // user@server is *always* interpreted as a hostname, and url
  // resolution will treat //foo/bar as host=foo,path=bar because that's
  // how the browser resolves relative URLs.
  if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
    slashes = rest.substr(0, 2) === '//';
    if (slashes && !(proto && hostlessProtocol[proto])) {
      rest = rest.substr(2);
      this.slashes = true;
    }
  }

  if (!hostlessProtocol[proto] &&
      (slashes || (proto && !slashedProtocol[proto]))) {

    // there's a hostname.
    // the first instance of /, ?, ;, or # ends the host.
    //
    // If there is an @ in the hostname, then non-host chars *are* allowed
    // to the left of the last @ sign, unless some host-ending character
    // comes *before* the @-sign.
    // URLs are obnoxious.
    //
    // ex:
    // http://a@b@c/ => user:a@b host:c
    // http://a@b?@c => user:a host:c path:/?@c

    // v0.12 TODO(isaacs): This is not quite how Chrome does things.
    // Review our test case against browsers more comprehensively.

    // find the first instance of any hostEndingChars
    var hostEnd = -1;
    for (i = 0; i < hostEndingChars.length; i++) {
      hec = rest.indexOf(hostEndingChars[i]);
      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd)) {
        hostEnd = hec;
      }
    }

    // at this point, either we have an explicit point where the
    // auth portion cannot go past, or the last @ char is the decider.
    var auth, atSign;
    if (hostEnd === -1) {
      // atSign can be anywhere.
      atSign = rest.lastIndexOf('@');
    } else {
      // atSign must be in auth portion.
      // http://a@b/c@d => host:b auth:a path:/c@d
      atSign = rest.lastIndexOf('@', hostEnd);
    }

    // Now we have a portion which is definitely the auth.
    // Pull that off.
    if (atSign !== -1) {
      auth = rest.slice(0, atSign);
      rest = rest.slice(atSign + 1);
      this.auth = auth;
    }

    // the host is the remaining to the left of the first non-host char
    hostEnd = -1;
    for (i = 0; i < nonHostChars.length; i++) {
      hec = rest.indexOf(nonHostChars[i]);
      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd)) {
        hostEnd = hec;
      }
    }
    // if we still have not hit it, then the entire thing is a host.
    if (hostEnd === -1) {
      hostEnd = rest.length;
    }

    if (rest[hostEnd - 1] === ':') { hostEnd--; }
    var host = rest.slice(0, hostEnd);
    rest = rest.slice(hostEnd);

    // pull out port.
    this.parseHost(host);

    // we've indicated that there is a hostname,
    // so even if it's empty, it has to be present.
    this.hostname = this.hostname || '';

    // if hostname begins with [ and ends with ]
    // assume that it's an IPv6 address.
    var ipv6Hostname = this.hostname[0] === '[' &&
        this.hostname[this.hostname.length - 1] === ']';

    // validate a little.
    if (!ipv6Hostname) {
      var hostparts = this.hostname.split(/\./);
      for (i = 0, l = hostparts.length; i < l; i++) {
        var part = hostparts[i];
        if (!part) { continue; }
        if (!part.match(hostnamePartPattern)) {
          var newpart = '';
          for (var j = 0, k = part.length; j < k; j++) {
            if (part.charCodeAt(j) > 127) {
              // we replace non-ASCII char with a temporary placeholder
              // we need this to make sure size of hostname is not
              // broken by replacing non-ASCII by nothing
              newpart += 'x';
            } else {
              newpart += part[j];
            }
          }
          // we test again with ASCII char only
          if (!newpart.match(hostnamePartPattern)) {
            var validParts = hostparts.slice(0, i);
            var notHost = hostparts.slice(i + 1);
            var bit = part.match(hostnamePartStart);
            if (bit) {
              validParts.push(bit[1]);
              notHost.unshift(bit[2]);
            }
            if (notHost.length) {
              rest = notHost.join('.') + rest;
            }
            this.hostname = validParts.join('.');
            break;
          }
        }
      }
    }

    if (this.hostname.length > hostnameMaxLen) {
      this.hostname = '';
    }

    // strip [ and ] from the hostname
    // the host field still retains them, though
    if (ipv6Hostname) {
      this.hostname = this.hostname.substr(1, this.hostname.length - 2);
    }
  }

  // chop off from the tail first.
  var hash = rest.indexOf('#');
  if (hash !== -1) {
    // got a fragment string.
    this.hash = rest.substr(hash);
    rest = rest.slice(0, hash);
  }
  var qm = rest.indexOf('?');
  if (qm !== -1) {
    this.search = rest.substr(qm);
    rest = rest.slice(0, qm);
  }
  if (rest) { this.pathname = rest; }
  if (slashedProtocol[lowerProto] &&
      this.hostname && !this.pathname) {
    this.pathname = '';
  }

  return this;
};

Url.prototype.parseHost = function(host) {
  var port = portPattern.exec(host);
  if (port) {
    port = port[0];
    if (port !== ':') {
      this.port = port.substr(1);
    }
    host = host.substr(0, host.length - port.length);
  }
  if (host) { this.hostname = host; }
};

module.exports = urlParse;

},{}],60:[function(require,module,exports){
(function (global){
/*! https://mths.be/punycode v1.4.1 by @mathias */
;(function(root) {

	/** Detect free variables */
	var freeExports = typeof exports == 'object' && exports &&
		!exports.nodeType && exports;
	var freeModule = typeof module == 'object' && module &&
		!module.nodeType && module;
	var freeGlobal = typeof global == 'object' && global;
	if (
		freeGlobal.global === freeGlobal ||
		freeGlobal.window === freeGlobal ||
		freeGlobal.self === freeGlobal
	) {
		root = freeGlobal;
	}

	/**
	 * The `punycode` object.
	 * @name punycode
	 * @type Object
	 */
	var punycode,

	/** Highest positive signed 32-bit float value */
	maxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1

	/** Bootstring parameters */
	base = 36,
	tMin = 1,
	tMax = 26,
	skew = 38,
	damp = 700,
	initialBias = 72,
	initialN = 128, // 0x80
	delimiter = '-', // '\x2D'

	/** Regular expressions */
	regexPunycode = /^xn--/,
	regexNonASCII = /[^\x20-\x7E]/, // unprintable ASCII chars + non-ASCII chars
	regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g, // RFC 3490 separators

	/** Error messages */
	errors = {
		'overflow': 'Overflow: input needs wider integers to process',
		'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
		'invalid-input': 'Invalid input'
	},

	/** Convenience shortcuts */
	baseMinusTMin = base - tMin,
	floor = Math.floor,
	stringFromCharCode = String.fromCharCode,

	/** Temporary variable */
	key;

	/*--------------------------------------------------------------------------*/

	/**
	 * A generic error utility function.
	 * @private
	 * @param {String} type The error type.
	 * @returns {Error} Throws a `RangeError` with the applicable error message.
	 */
	function error(type) {
		throw new RangeError(errors[type]);
	}

	/**
	 * A generic `Array#map` utility function.
	 * @private
	 * @param {Array} array The array to iterate over.
	 * @param {Function} callback The function that gets called for every array
	 * item.
	 * @returns {Array} A new array of values returned by the callback function.
	 */
	function map(array, fn) {
		var length = array.length;
		var result = [];
		while (length--) {
			result[length] = fn(array[length]);
		}
		return result;
	}

	/**
	 * A simple `Array#map`-like wrapper to work with domain name strings or email
	 * addresses.
	 * @private
	 * @param {String} domain The domain name or email address.
	 * @param {Function} callback The function that gets called for every
	 * character.
	 * @returns {Array} A new string of characters returned by the callback
	 * function.
	 */
	function mapDomain(string, fn) {
		var parts = string.split('@');
		var result = '';
		if (parts.length > 1) {
			// In email addresses, only the domain name should be punycoded. Leave
			// the local part (i.e. everything up to `@`) intact.
			result = parts[0] + '@';
			string = parts[1];
		}
		// Avoid `split(regex)` for IE8 compatibility. See #17.
		string = string.replace(regexSeparators, '\x2E');
		var labels = string.split('.');
		var encoded = map(labels, fn).join('.');
		return result + encoded;
	}

	/**
	 * Creates an array containing the numeric code points of each Unicode
	 * character in the string. While JavaScript uses UCS-2 internally,
	 * this function will convert a pair of surrogate halves (each of which
	 * UCS-2 exposes as separate characters) into a single code point,
	 * matching UTF-16.
	 * @see `punycode.ucs2.encode`
	 * @see <https://mathiasbynens.be/notes/javascript-encoding>
	 * @memberOf punycode.ucs2
	 * @name decode
	 * @param {String} string The Unicode input string (UCS-2).
	 * @returns {Array} The new array of code points.
	 */
	function ucs2decode(string) {
		var output = [],
		    counter = 0,
		    length = string.length,
		    value,
		    extra;
		while (counter < length) {
			value = string.charCodeAt(counter++);
			if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
				// high surrogate, and there is a next character
				extra = string.charCodeAt(counter++);
				if ((extra & 0xFC00) == 0xDC00) { // low surrogate
					output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
				} else {
					// unmatched surrogate; only append this code unit, in case the next
					// code unit is the high surrogate of a surrogate pair
					output.push(value);
					counter--;
				}
			} else {
				output.push(value);
			}
		}
		return output;
	}

	/**
	 * Creates a string based on an array of numeric code points.
	 * @see `punycode.ucs2.decode`
	 * @memberOf punycode.ucs2
	 * @name encode
	 * @param {Array} codePoints The array of numeric code points.
	 * @returns {String} The new Unicode string (UCS-2).
	 */
	function ucs2encode(array) {
		return map(array, function(value) {
			var output = '';
			if (value > 0xFFFF) {
				value -= 0x10000;
				output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
				value = 0xDC00 | value & 0x3FF;
			}
			output += stringFromCharCode(value);
			return output;
		}).join('');
	}

	/**
	 * Converts a basic code point into a digit/integer.
	 * @see `digitToBasic()`
	 * @private
	 * @param {Number} codePoint The basic numeric code point value.
	 * @returns {Number} The numeric value of a basic code point (for use in
	 * representing integers) in the range `0` to `base - 1`, or `base` if
	 * the code point does not represent a value.
	 */
	function basicToDigit(codePoint) {
		if (codePoint - 48 < 10) {
			return codePoint - 22;
		}
		if (codePoint - 65 < 26) {
			return codePoint - 65;
		}
		if (codePoint - 97 < 26) {
			return codePoint - 97;
		}
		return base;
	}

	/**
	 * Converts a digit/integer into a basic code point.
	 * @see `basicToDigit()`
	 * @private
	 * @param {Number} digit The numeric value of a basic code point.
	 * @returns {Number} The basic code point whose value (when used for
	 * representing integers) is `digit`, which needs to be in the range
	 * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
	 * used; else, the lowercase form is used. The behavior is undefined
	 * if `flag` is non-zero and `digit` has no uppercase form.
	 */
	function digitToBasic(digit, flag) {
		//  0..25 map to ASCII a..z or A..Z
		// 26..35 map to ASCII 0..9
		return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
	}

	/**
	 * Bias adaptation function as per section 3.4 of RFC 3492.
	 * https://tools.ietf.org/html/rfc3492#section-3.4
	 * @private
	 */
	function adapt(delta, numPoints, firstTime) {
		var k = 0;
		delta = firstTime ? floor(delta / damp) : delta >> 1;
		delta += floor(delta / numPoints);
		for (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {
			delta = floor(delta / baseMinusTMin);
		}
		return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
	}

	/**
	 * Converts a Punycode string of ASCII-only symbols to a string of Unicode
	 * symbols.
	 * @memberOf punycode
	 * @param {String} input The Punycode string of ASCII-only symbols.
	 * @returns {String} The resulting string of Unicode symbols.
	 */
	function decode(input) {
		// Don't use UCS-2
		var output = [],
		    inputLength = input.length,
		    out,
		    i = 0,
		    n = initialN,
		    bias = initialBias,
		    basic,
		    j,
		    index,
		    oldi,
		    w,
		    k,
		    digit,
		    t,
		    /** Cached calculation results */
		    baseMinusT;

		// Handle the basic code points: let `basic` be the number of input code
		// points before the last delimiter, or `0` if there is none, then copy
		// the first basic code points to the output.

		basic = input.lastIndexOf(delimiter);
		if (basic < 0) {
			basic = 0;
		}

		for (j = 0; j < basic; ++j) {
			// if it's not a basic code point
			if (input.charCodeAt(j) >= 0x80) {
				error('not-basic');
			}
			output.push(input.charCodeAt(j));
		}

		// Main decoding loop: start just after the last delimiter if any basic code
		// points were copied; start at the beginning otherwise.

		for (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {

			// `index` is the index of the next character to be consumed.
			// Decode a generalized variable-length integer into `delta`,
			// which gets added to `i`. The overflow checking is easier
			// if we increase `i` as we go, then subtract off its starting
			// value at the end to obtain `delta`.
			for (oldi = i, w = 1, k = base; /* no condition */; k += base) {

				if (index >= inputLength) {
					error('invalid-input');
				}

				digit = basicToDigit(input.charCodeAt(index++));

				if (digit >= base || digit > floor((maxInt - i) / w)) {
					error('overflow');
				}

				i += digit * w;
				t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);

				if (digit < t) {
					break;
				}

				baseMinusT = base - t;
				if (w > floor(maxInt / baseMinusT)) {
					error('overflow');
				}

				w *= baseMinusT;

			}

			out = output.length + 1;
			bias = adapt(i - oldi, out, oldi == 0);

			// `i` was supposed to wrap around from `out` to `0`,
			// incrementing `n` each time, so we'll fix that now:
			if (floor(i / out) > maxInt - n) {
				error('overflow');
			}

			n += floor(i / out);
			i %= out;

			// Insert `n` at position `i` of the output
			output.splice(i++, 0, n);

		}

		return ucs2encode(output);
	}

	/**
	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
	 * Punycode string of ASCII-only symbols.
	 * @memberOf punycode
	 * @param {String} input The string of Unicode symbols.
	 * @returns {String} The resulting Punycode string of ASCII-only symbols.
	 */
	function encode(input) {
		var n,
		    delta,
		    handledCPCount,
		    basicLength,
		    bias,
		    j,
		    m,
		    q,
		    k,
		    t,
		    currentValue,
		    output = [],
		    /** `inputLength` will hold the number of code points in `input`. */
		    inputLength,
		    /** Cached calculation results */
		    handledCPCountPlusOne,
		    baseMinusT,
		    qMinusT;

		// Convert the input in UCS-2 to Unicode
		input = ucs2decode(input);

		// Cache the length
		inputLength = input.length;

		// Initialize the state
		n = initialN;
		delta = 0;
		bias = initialBias;

		// Handle the basic code points
		for (j = 0; j < inputLength; ++j) {
			currentValue = input[j];
			if (currentValue < 0x80) {
				output.push(stringFromCharCode(currentValue));
			}
		}

		handledCPCount = basicLength = output.length;

		// `handledCPCount` is the number of code points that have been handled;
		// `basicLength` is the number of basic code points.

		// Finish the basic string - if it is not empty - with a delimiter
		if (basicLength) {
			output.push(delimiter);
		}

		// Main encoding loop:
		while (handledCPCount < inputLength) {

			// All non-basic code points < n have been handled already. Find the next
			// larger one:
			for (m = maxInt, j = 0; j < inputLength; ++j) {
				currentValue = input[j];
				if (currentValue >= n && currentValue < m) {
					m = currentValue;
				}
			}

			// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
			// but guard against overflow
			handledCPCountPlusOne = handledCPCount + 1;
			if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
				error('overflow');
			}

			delta += (m - n) * handledCPCountPlusOne;
			n = m;

			for (j = 0; j < inputLength; ++j) {
				currentValue = input[j];

				if (currentValue < n && ++delta > maxInt) {
					error('overflow');
				}

				if (currentValue == n) {
					// Represent delta as a generalized variable-length integer
					for (q = delta, k = base; /* no condition */; k += base) {
						t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
						if (q < t) {
							break;
						}
						qMinusT = q - t;
						baseMinusT = base - t;
						output.push(
							stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))
						);
						q = floor(qMinusT / baseMinusT);
					}

					output.push(stringFromCharCode(digitToBasic(q, 0)));
					bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
					delta = 0;
					++handledCPCount;
				}
			}

			++delta;
			++n;

		}
		return output.join('');
	}

	/**
	 * Converts a Punycode string representing a domain name or an email address
	 * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
	 * it doesn't matter if you call it on a string that has already been
	 * converted to Unicode.
	 * @memberOf punycode
	 * @param {String} input The Punycoded domain name or email address to
	 * convert to Unicode.
	 * @returns {String} The Unicode representation of the given Punycode
	 * string.
	 */
	function toUnicode(input) {
		return mapDomain(input, function(string) {
			return regexPunycode.test(string)
				? decode(string.slice(4).toLowerCase())
				: string;
		});
	}

	/**
	 * Converts a Unicode string representing a domain name or an email address to
	 * Punycode. Only the non-ASCII parts of the domain name will be converted,
	 * i.e. it doesn't matter if you call it with a domain that's already in
	 * ASCII.
	 * @memberOf punycode
	 * @param {String} input The domain name or email address to convert, as a
	 * Unicode string.
	 * @returns {String} The Punycode representation of the given domain name or
	 * email address.
	 */
	function toASCII(input) {
		return mapDomain(input, function(string) {
			return regexNonASCII.test(string)
				? 'xn--' + encode(string)
				: string;
		});
	}

	/*--------------------------------------------------------------------------*/

	/** Define the public API */
	punycode = {
		/**
		 * A string representing the current Punycode.js version number.
		 * @memberOf punycode
		 * @type String
		 */
		'version': '1.4.1',
		/**
		 * An object of methods to convert from JavaScript's internal character
		 * representation (UCS-2) to Unicode code points, and back.
		 * @see <https://mathiasbynens.be/notes/javascript-encoding>
		 * @memberOf punycode
		 * @type Object
		 */
		'ucs2': {
			'decode': ucs2decode,
			'encode': ucs2encode
		},
		'decode': decode,
		'encode': encode,
		'toASCII': toASCII,
		'toUnicode': toUnicode
	};

	/** Expose `punycode` */
	// Some AMD build optimizers, like r.js, check for specific condition patterns
	// like the following:
	if (
		typeof define == 'function' &&
		typeof define.amd == 'object' &&
		define.amd
	) {
		define('punycode', function() {
			return punycode;
		});
	} else if (freeExports && freeModule) {
		if (module.exports == freeExports) {
			// in Node.js, io.js, or RingoJS v0.8.0+
			freeModule.exports = punycode;
		} else {
			// in Narwhal or RingoJS v0.7.0-
			for (key in punycode) {
				punycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);
			}
		}
	} else {
		// in Rhino or a web browser
		root.punycode = punycode;
	}

}(this));

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],61:[function(require,module,exports){
module.exports=/[\0-\x1F\x7F-\x9F]/
},{}],62:[function(require,module,exports){
module.exports=/[\xAD\u0600-\u0605\u061C\u06DD\u070F\u08E2\u180E\u200B-\u200F\u202A-\u202E\u2060-\u2064\u2066-\u206F\uFEFF\uFFF9-\uFFFB]|\uD804\uDCBD|\uD82F[\uDCA0-\uDCA3]|\uD834[\uDD73-\uDD7A]|\uDB40[\uDC01\uDC20-\uDC7F]/
},{}],63:[function(require,module,exports){
module.exports=/[!-#%-\*,-/:;\?@\[-\]_\{\}\xA1\xA7\xAB\xB6\xB7\xBB\xBF\u037E\u0387\u055A-\u055F\u0589\u058A\u05BE\u05C0\u05C3\u05C6\u05F3\u05F4\u0609\u060A\u060C\u060D\u061B\u061E\u061F\u066A-\u066D\u06D4\u0700-\u070D\u07F7-\u07F9\u0830-\u083E\u085E\u0964\u0965\u0970\u09FD\u0AF0\u0DF4\u0E4F\u0E5A\u0E5B\u0F04-\u0F12\u0F14\u0F3A-\u0F3D\u0F85\u0FD0-\u0FD4\u0FD9\u0FDA\u104A-\u104F\u10FB\u1360-\u1368\u1400\u166D\u166E\u169B\u169C\u16EB-\u16ED\u1735\u1736\u17D4-\u17D6\u17D8-\u17DA\u1800-\u180A\u1944\u1945\u1A1E\u1A1F\u1AA0-\u1AA6\u1AA8-\u1AAD\u1B5A-\u1B60\u1BFC-\u1BFF\u1C3B-\u1C3F\u1C7E\u1C7F\u1CC0-\u1CC7\u1CD3\u2010-\u2027\u2030-\u2043\u2045-\u2051\u2053-\u205E\u207D\u207E\u208D\u208E\u2308-\u230B\u2329\u232A\u2768-\u2775\u27C5\u27C6\u27E6-\u27EF\u2983-\u2998\u29D8-\u29DB\u29FC\u29FD\u2CF9-\u2CFC\u2CFE\u2CFF\u2D70\u2E00-\u2E2E\u2E30-\u2E49\u3001-\u3003\u3008-\u3011\u3014-\u301F\u3030\u303D\u30A0\u30FB\uA4FE\uA4FF\uA60D-\uA60F\uA673\uA67E\uA6F2-\uA6F7\uA874-\uA877\uA8CE\uA8CF\uA8F8-\uA8FA\uA8FC\uA92E\uA92F\uA95F\uA9C1-\uA9CD\uA9DE\uA9DF\uAA5C-\uAA5F\uAADE\uAADF\uAAF0\uAAF1\uABEB\uFD3E\uFD3F\uFE10-\uFE19\uFE30-\uFE52\uFE54-\uFE61\uFE63\uFE68\uFE6A\uFE6B\uFF01-\uFF03\uFF05-\uFF0A\uFF0C-\uFF0F\uFF1A\uFF1B\uFF1F\uFF20\uFF3B-\uFF3D\uFF3F\uFF5B\uFF5D\uFF5F-\uFF65]|\uD800[\uDD00-\uDD02\uDF9F\uDFD0]|\uD801\uDD6F|\uD802[\uDC57\uDD1F\uDD3F\uDE50-\uDE58\uDE7F\uDEF0-\uDEF6\uDF39-\uDF3F\uDF99-\uDF9C]|\uD804[\uDC47-\uDC4D\uDCBB\uDCBC\uDCBE-\uDCC1\uDD40-\uDD43\uDD74\uDD75\uDDC5-\uDDC9\uDDCD\uDDDB\uDDDD-\uDDDF\uDE38-\uDE3D\uDEA9]|\uD805[\uDC4B-\uDC4F\uDC5B\uDC5D\uDCC6\uDDC1-\uDDD7\uDE41-\uDE43\uDE60-\uDE6C\uDF3C-\uDF3E]|\uD806[\uDE3F-\uDE46\uDE9A-\uDE9C\uDE9E-\uDEA2]|\uD807[\uDC41-\uDC45\uDC70\uDC71]|\uD809[\uDC70-\uDC74]|\uD81A[\uDE6E\uDE6F\uDEF5\uDF37-\uDF3B\uDF44]|\uD82F\uDC9F|\uD836[\uDE87-\uDE8B]|\uD83A[\uDD5E\uDD5F]/
},{}],64:[function(require,module,exports){
module.exports=/[ \xA0\u1680\u2000-\u200A\u202F\u205F\u3000]/
},{}],65:[function(require,module,exports){
'use strict';

exports.Any = require('./properties/Any/regex');
exports.Cc  = require('./categories/Cc/regex');
exports.Cf  = require('./categories/Cf/regex');
exports.P   = require('./categories/P/regex');
exports.Z   = require('./categories/Z/regex');

},{"./categories/Cc/regex":61,"./categories/Cf/regex":62,"./categories/P/regex":63,"./categories/Z/regex":64,"./properties/Any/regex":66}],66:[function(require,module,exports){
module.exports=/[\0-\uD7FF\uE000-\uFFFF]|[\uD800-\uDBFF][\uDC00-\uDFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/
},{}],67:[function(require,module,exports){
'use strict';


module.exports = require('./lib/');

},{"./lib/":9}]},{},[67])(67)
});