$(document).ready(function() {/*!
 * built for development by sk@pc22
 * on Thu, 11 Nov 2021 14:30:20 GMT
 * https://gitlab.wobblies.org/techkomm/nextcloud-scripts
 */

(function () {
  'use strict';

  /*! js-yaml 4.1.0 https://github.com/nodeca/js-yaml @license MIT */
  function isNothing(subject) {
    return (typeof subject === 'undefined') || (subject === null);
  }


  function isObject(subject) {
    return (typeof subject === 'object') && (subject !== null);
  }


  function toArray(sequence) {
    if (Array.isArray(sequence)) return sequence;
    else if (isNothing(sequence)) return [];

    return [ sequence ];
  }


  function extend(target, source) {
    var index, length, key, sourceKeys;

    if (source) {
      sourceKeys = Object.keys(source);

      for (index = 0, length = sourceKeys.length; index < length; index += 1) {
        key = sourceKeys[index];
        target[key] = source[key];
      }
    }

    return target;
  }


  function repeat(string, count) {
    var result = '', cycle;

    for (cycle = 0; cycle < count; cycle += 1) {
      result += string;
    }

    return result;
  }


  function isNegativeZero(number) {
    return (number === 0) && (Number.NEGATIVE_INFINITY === 1 / number);
  }


  var isNothing_1      = isNothing;
  var isObject_1       = isObject;
  var toArray_1        = toArray;
  var repeat_1         = repeat;
  var isNegativeZero_1 = isNegativeZero;
  var extend_1         = extend;

  var common = {
  	isNothing: isNothing_1,
  	isObject: isObject_1,
  	toArray: toArray_1,
  	repeat: repeat_1,
  	isNegativeZero: isNegativeZero_1,
  	extend: extend_1
  };

  // YAML error class. http://stackoverflow.com/questions/8458984


  function formatError(exception, compact) {
    var where = '', message = exception.reason || '(unknown reason)';

    if (!exception.mark) return message;

    if (exception.mark.name) {
      where += 'in "' + exception.mark.name + '" ';
    }

    where += '(' + (exception.mark.line + 1) + ':' + (exception.mark.column + 1) + ')';

    if (!compact && exception.mark.snippet) {
      where += '\n\n' + exception.mark.snippet;
    }

    return message + ' ' + where;
  }


  function YAMLException$1(reason, mark) {
    // Super constructor
    Error.call(this);

    this.name = 'YAMLException';
    this.reason = reason;
    this.mark = mark;
    this.message = formatError(this, false);

    // Include stack trace in error object
    if (Error.captureStackTrace) {
      // Chrome and NodeJS
      Error.captureStackTrace(this, this.constructor);
    } else {
      // FF, IE 10+ and Safari 6+. Fallback for others
      this.stack = (new Error()).stack || '';
    }
  }


  // Inherit from Error
  YAMLException$1.prototype = Object.create(Error.prototype);
  YAMLException$1.prototype.constructor = YAMLException$1;


  YAMLException$1.prototype.toString = function toString(compact) {
    return this.name + ': ' + formatError(this, compact);
  };


  var exception = YAMLException$1;

  // get snippet for a single line, respecting maxLength
  function getLine(buffer, lineStart, lineEnd, position, maxLineLength) {
    var head = '';
    var tail = '';
    var maxHalfLength = Math.floor(maxLineLength / 2) - 1;

    if (position - lineStart > maxHalfLength) {
      head = ' ... ';
      lineStart = position - maxHalfLength + head.length;
    }

    if (lineEnd - position > maxHalfLength) {
      tail = ' ...';
      lineEnd = position + maxHalfLength - tail.length;
    }

    return {
      str: head + buffer.slice(lineStart, lineEnd).replace(/\t/g, '→') + tail,
      pos: position - lineStart + head.length // relative position
    };
  }


  function padStart(string, max) {
    return common.repeat(' ', max - string.length) + string;
  }


  function makeSnippet(mark, options) {
    options = Object.create(options || null);

    if (!mark.buffer) return null;

    if (!options.maxLength) options.maxLength = 79;
    if (typeof options.indent      !== 'number') options.indent      = 1;
    if (typeof options.linesBefore !== 'number') options.linesBefore = 3;
    if (typeof options.linesAfter  !== 'number') options.linesAfter  = 2;

    var re = /\r?\n|\r|\0/g;
    var lineStarts = [ 0 ];
    var lineEnds = [];
    var match;
    var foundLineNo = -1;

    while ((match = re.exec(mark.buffer))) {
      lineEnds.push(match.index);
      lineStarts.push(match.index + match[0].length);

      if (mark.position <= match.index && foundLineNo < 0) {
        foundLineNo = lineStarts.length - 2;
      }
    }

    if (foundLineNo < 0) foundLineNo = lineStarts.length - 1;

    var result = '', i, line;
    var lineNoLength = Math.min(mark.line + options.linesAfter, lineEnds.length).toString().length;
    var maxLineLength = options.maxLength - (options.indent + lineNoLength + 3);

    for (i = 1; i <= options.linesBefore; i++) {
      if (foundLineNo - i < 0) break;
      line = getLine(
        mark.buffer,
        lineStarts[foundLineNo - i],
        lineEnds[foundLineNo - i],
        mark.position - (lineStarts[foundLineNo] - lineStarts[foundLineNo - i]),
        maxLineLength
      );
      result = common.repeat(' ', options.indent) + padStart((mark.line - i + 1).toString(), lineNoLength) +
        ' | ' + line.str + '\n' + result;
    }

    line = getLine(mark.buffer, lineStarts[foundLineNo], lineEnds[foundLineNo], mark.position, maxLineLength);
    result += common.repeat(' ', options.indent) + padStart((mark.line + 1).toString(), lineNoLength) +
      ' | ' + line.str + '\n';
    result += common.repeat('-', options.indent + lineNoLength + 3 + line.pos) + '^' + '\n';

    for (i = 1; i <= options.linesAfter; i++) {
      if (foundLineNo + i >= lineEnds.length) break;
      line = getLine(
        mark.buffer,
        lineStarts[foundLineNo + i],
        lineEnds[foundLineNo + i],
        mark.position - (lineStarts[foundLineNo] - lineStarts[foundLineNo + i]),
        maxLineLength
      );
      result += common.repeat(' ', options.indent) + padStart((mark.line + i + 1).toString(), lineNoLength) +
        ' | ' + line.str + '\n';
    }

    return result.replace(/\n$/, '');
  }


  var snippet = makeSnippet;

  var TYPE_CONSTRUCTOR_OPTIONS = [
    'kind',
    'multi',
    'resolve',
    'construct',
    'instanceOf',
    'predicate',
    'represent',
    'representName',
    'defaultStyle',
    'styleAliases'
  ];

  var YAML_NODE_KINDS = [
    'scalar',
    'sequence',
    'mapping'
  ];

  function compileStyleAliases(map) {
    var result = {};

    if (map !== null) {
      Object.keys(map).forEach(function (style) {
        map[style].forEach(function (alias) {
          result[String(alias)] = style;
        });
      });
    }

    return result;
  }

  function Type$1(tag, options) {
    options = options || {};

    Object.keys(options).forEach(function (name) {
      if (TYPE_CONSTRUCTOR_OPTIONS.indexOf(name) === -1) {
        throw new exception('Unknown option "' + name + '" is met in definition of "' + tag + '" YAML type.');
      }
    });

    // TODO: Add tag format check.
    this.options       = options; // keep original options in case user wants to extend this type later
    this.tag           = tag;
    this.kind          = options['kind']          || null;
    this.resolve       = options['resolve']       || function () { return true; };
    this.construct     = options['construct']     || function (data) { return data; };
    this.instanceOf    = options['instanceOf']    || null;
    this.predicate     = options['predicate']     || null;
    this.represent     = options['represent']     || null;
    this.representName = options['representName'] || null;
    this.defaultStyle  = options['defaultStyle']  || null;
    this.multi         = options['multi']         || false;
    this.styleAliases  = compileStyleAliases(options['styleAliases'] || null);

    if (YAML_NODE_KINDS.indexOf(this.kind) === -1) {
      throw new exception('Unknown kind "' + this.kind + '" is specified for "' + tag + '" YAML type.');
    }
  }

  var type = Type$1;

  /*eslint-disable max-len*/





  function compileList(schema, name) {
    var result = [];

    schema[name].forEach(function (currentType) {
      var newIndex = result.length;

      result.forEach(function (previousType, previousIndex) {
        if (previousType.tag === currentType.tag &&
            previousType.kind === currentType.kind &&
            previousType.multi === currentType.multi) {

          newIndex = previousIndex;
        }
      });

      result[newIndex] = currentType;
    });

    return result;
  }


  function compileMap(/* lists... */) {
    var result = {
          scalar: {},
          sequence: {},
          mapping: {},
          fallback: {},
          multi: {
            scalar: [],
            sequence: [],
            mapping: [],
            fallback: []
          }
        }, index, length;

    function collectType(type) {
      if (type.multi) {
        result.multi[type.kind].push(type);
        result.multi['fallback'].push(type);
      } else {
        result[type.kind][type.tag] = result['fallback'][type.tag] = type;
      }
    }

    for (index = 0, length = arguments.length; index < length; index += 1) {
      arguments[index].forEach(collectType);
    }
    return result;
  }


  function Schema$1(definition) {
    return this.extend(definition);
  }


  Schema$1.prototype.extend = function extend(definition) {
    var implicit = [];
    var explicit = [];

    if (definition instanceof type) {
      // Schema.extend(type)
      explicit.push(definition);

    } else if (Array.isArray(definition)) {
      // Schema.extend([ type1, type2, ... ])
      explicit = explicit.concat(definition);

    } else if (definition && (Array.isArray(definition.implicit) || Array.isArray(definition.explicit))) {
      // Schema.extend({ explicit: [ type1, type2, ... ], implicit: [ type1, type2, ... ] })
      if (definition.implicit) implicit = implicit.concat(definition.implicit);
      if (definition.explicit) explicit = explicit.concat(definition.explicit);

    } else {
      throw new exception('Schema.extend argument should be a Type, [ Type ], ' +
        'or a schema definition ({ implicit: [...], explicit: [...] })');
    }

    implicit.forEach(function (type$1) {
      if (!(type$1 instanceof type)) {
        throw new exception('Specified list of YAML types (or a single Type object) contains a non-Type object.');
      }

      if (type$1.loadKind && type$1.loadKind !== 'scalar') {
        throw new exception('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');
      }

      if (type$1.multi) {
        throw new exception('There is a multi type in the implicit list of a schema. Multi tags can only be listed as explicit.');
      }
    });

    explicit.forEach(function (type$1) {
      if (!(type$1 instanceof type)) {
        throw new exception('Specified list of YAML types (or a single Type object) contains a non-Type object.');
      }
    });

    var result = Object.create(Schema$1.prototype);

    result.implicit = (this.implicit || []).concat(implicit);
    result.explicit = (this.explicit || []).concat(explicit);

    result.compiledImplicit = compileList(result, 'implicit');
    result.compiledExplicit = compileList(result, 'explicit');
    result.compiledTypeMap  = compileMap(result.compiledImplicit, result.compiledExplicit);

    return result;
  };


  var schema = Schema$1;

  var str = new type('tag:yaml.org,2002:str', {
    kind: 'scalar',
    construct: function (data) { return data !== null ? data : ''; }
  });

  var seq = new type('tag:yaml.org,2002:seq', {
    kind: 'sequence',
    construct: function (data) { return data !== null ? data : []; }
  });

  var map = new type('tag:yaml.org,2002:map', {
    kind: 'mapping',
    construct: function (data) { return data !== null ? data : {}; }
  });

  var failsafe = new schema({
    explicit: [
      str,
      seq,
      map
    ]
  });

  function resolveYamlNull(data) {
    if (data === null) return true;

    var max = data.length;

    return (max === 1 && data === '~') ||
           (max === 4 && (data === 'null' || data === 'Null' || data === 'NULL'));
  }

  function constructYamlNull() {
    return null;
  }

  function isNull(object) {
    return object === null;
  }

  var _null = new type('tag:yaml.org,2002:null', {
    kind: 'scalar',
    resolve: resolveYamlNull,
    construct: constructYamlNull,
    predicate: isNull,
    represent: {
      canonical: function () { return '~';    },
      lowercase: function () { return 'null'; },
      uppercase: function () { return 'NULL'; },
      camelcase: function () { return 'Null'; },
      empty:     function () { return '';     }
    },
    defaultStyle: 'lowercase'
  });

  function resolveYamlBoolean(data) {
    if (data === null) return false;

    var max = data.length;

    return (max === 4 && (data === 'true' || data === 'True' || data === 'TRUE')) ||
           (max === 5 && (data === 'false' || data === 'False' || data === 'FALSE'));
  }

  function constructYamlBoolean(data) {
    return data === 'true' ||
           data === 'True' ||
           data === 'TRUE';
  }

  function isBoolean(object) {
    return Object.prototype.toString.call(object) === '[object Boolean]';
  }

  var bool = new type('tag:yaml.org,2002:bool', {
    kind: 'scalar',
    resolve: resolveYamlBoolean,
    construct: constructYamlBoolean,
    predicate: isBoolean,
    represent: {
      lowercase: function (object) { return object ? 'true' : 'false'; },
      uppercase: function (object) { return object ? 'TRUE' : 'FALSE'; },
      camelcase: function (object) { return object ? 'True' : 'False'; }
    },
    defaultStyle: 'lowercase'
  });

  function isHexCode(c) {
    return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) ||
           ((0x41/* A */ <= c) && (c <= 0x46/* F */)) ||
           ((0x61/* a */ <= c) && (c <= 0x66/* f */));
  }

  function isOctCode(c) {
    return ((0x30/* 0 */ <= c) && (c <= 0x37/* 7 */));
  }

  function isDecCode(c) {
    return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */));
  }

  function resolveYamlInteger(data) {
    if (data === null) return false;

    var max = data.length,
        index = 0,
        hasDigits = false,
        ch;

    if (!max) return false;

    ch = data[index];

    // sign
    if (ch === '-' || ch === '+') {
      ch = data[++index];
    }

    if (ch === '0') {
      // 0
      if (index + 1 === max) return true;
      ch = data[++index];

      // base 2, base 8, base 16

      if (ch === 'b') {
        // base 2
        index++;

        for (; index < max; index++) {
          ch = data[index];
          if (ch === '_') continue;
          if (ch !== '0' && ch !== '1') return false;
          hasDigits = true;
        }
        return hasDigits && ch !== '_';
      }


      if (ch === 'x') {
        // base 16
        index++;

        for (; index < max; index++) {
          ch = data[index];
          if (ch === '_') continue;
          if (!isHexCode(data.charCodeAt(index))) return false;
          hasDigits = true;
        }
        return hasDigits && ch !== '_';
      }


      if (ch === 'o') {
        // base 8
        index++;

        for (; index < max; index++) {
          ch = data[index];
          if (ch === '_') continue;
          if (!isOctCode(data.charCodeAt(index))) return false;
          hasDigits = true;
        }
        return hasDigits && ch !== '_';
      }
    }

    // base 10 (except 0)

    // value should not start with `_`;
    if (ch === '_') return false;

    for (; index < max; index++) {
      ch = data[index];
      if (ch === '_') continue;
      if (!isDecCode(data.charCodeAt(index))) {
        return false;
      }
      hasDigits = true;
    }

    // Should have digits and should not end with `_`
    if (!hasDigits || ch === '_') return false;

    return true;
  }

  function constructYamlInteger(data) {
    var value = data, sign = 1, ch;

    if (value.indexOf('_') !== -1) {
      value = value.replace(/_/g, '');
    }

    ch = value[0];

    if (ch === '-' || ch === '+') {
      if (ch === '-') sign = -1;
      value = value.slice(1);
      ch = value[0];
    }

    if (value === '0') return 0;

    if (ch === '0') {
      if (value[1] === 'b') return sign * parseInt(value.slice(2), 2);
      if (value[1] === 'x') return sign * parseInt(value.slice(2), 16);
      if (value[1] === 'o') return sign * parseInt(value.slice(2), 8);
    }

    return sign * parseInt(value, 10);
  }

  function isInteger(object) {
    return (Object.prototype.toString.call(object)) === '[object Number]' &&
           (object % 1 === 0 && !common.isNegativeZero(object));
  }

  var int = new type('tag:yaml.org,2002:int', {
    kind: 'scalar',
    resolve: resolveYamlInteger,
    construct: constructYamlInteger,
    predicate: isInteger,
    represent: {
      binary:      function (obj) { return obj >= 0 ? '0b' + obj.toString(2) : '-0b' + obj.toString(2).slice(1); },
      octal:       function (obj) { return obj >= 0 ? '0o'  + obj.toString(8) : '-0o'  + obj.toString(8).slice(1); },
      decimal:     function (obj) { return obj.toString(10); },
      /* eslint-disable max-len */
      hexadecimal: function (obj) { return obj >= 0 ? '0x' + obj.toString(16).toUpperCase() :  '-0x' + obj.toString(16).toUpperCase().slice(1); }
    },
    defaultStyle: 'decimal',
    styleAliases: {
      binary:      [ 2,  'bin' ],
      octal:       [ 8,  'oct' ],
      decimal:     [ 10, 'dec' ],
      hexadecimal: [ 16, 'hex' ]
    }
  });

  var YAML_FLOAT_PATTERN = new RegExp(
    // 2.5e4, 2.5 and integers
    '^(?:[-+]?(?:[0-9][0-9_]*)(?:\\.[0-9_]*)?(?:[eE][-+]?[0-9]+)?' +
    // .2e4, .2
    // special case, seems not from spec
    '|\\.[0-9_]+(?:[eE][-+]?[0-9]+)?' +
    // .inf
    '|[-+]?\\.(?:inf|Inf|INF)' +
    // .nan
    '|\\.(?:nan|NaN|NAN))$');

  function resolveYamlFloat(data) {
    if (data === null) return false;

    if (!YAML_FLOAT_PATTERN.test(data) ||
        // Quick hack to not allow integers end with `_`
        // Probably should update regexp & check speed
        data[data.length - 1] === '_') {
      return false;
    }

    return true;
  }

  function constructYamlFloat(data) {
    var value, sign;

    value  = data.replace(/_/g, '').toLowerCase();
    sign   = value[0] === '-' ? -1 : 1;

    if ('+-'.indexOf(value[0]) >= 0) {
      value = value.slice(1);
    }

    if (value === '.inf') {
      return (sign === 1) ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;

    } else if (value === '.nan') {
      return NaN;
    }
    return sign * parseFloat(value, 10);
  }


  var SCIENTIFIC_WITHOUT_DOT = /^[-+]?[0-9]+e/;

  function representYamlFloat(object, style) {
    var res;

    if (isNaN(object)) {
      switch (style) {
        case 'lowercase': return '.nan';
        case 'uppercase': return '.NAN';
        case 'camelcase': return '.NaN';
      }
    } else if (Number.POSITIVE_INFINITY === object) {
      switch (style) {
        case 'lowercase': return '.inf';
        case 'uppercase': return '.INF';
        case 'camelcase': return '.Inf';
      }
    } else if (Number.NEGATIVE_INFINITY === object) {
      switch (style) {
        case 'lowercase': return '-.inf';
        case 'uppercase': return '-.INF';
        case 'camelcase': return '-.Inf';
      }
    } else if (common.isNegativeZero(object)) {
      return '-0.0';
    }

    res = object.toString(10);

    // JS stringifier can build scientific format without dots: 5e-100,
    // while YAML requres dot: 5.e-100. Fix it with simple hack

    return SCIENTIFIC_WITHOUT_DOT.test(res) ? res.replace('e', '.e') : res;
  }

  function isFloat(object) {
    return (Object.prototype.toString.call(object) === '[object Number]') &&
           (object % 1 !== 0 || common.isNegativeZero(object));
  }

  var float = new type('tag:yaml.org,2002:float', {
    kind: 'scalar',
    resolve: resolveYamlFloat,
    construct: constructYamlFloat,
    predicate: isFloat,
    represent: representYamlFloat,
    defaultStyle: 'lowercase'
  });

  var json = failsafe.extend({
    implicit: [
      _null,
      bool,
      int,
      float
    ]
  });

  var core = json;

  var YAML_DATE_REGEXP = new RegExp(
    '^([0-9][0-9][0-9][0-9])'          + // [1] year
    '-([0-9][0-9])'                    + // [2] month
    '-([0-9][0-9])$');                   // [3] day

  var YAML_TIMESTAMP_REGEXP = new RegExp(
    '^([0-9][0-9][0-9][0-9])'          + // [1] year
    '-([0-9][0-9]?)'                   + // [2] month
    '-([0-9][0-9]?)'                   + // [3] day
    '(?:[Tt]|[ \\t]+)'                 + // ...
    '([0-9][0-9]?)'                    + // [4] hour
    ':([0-9][0-9])'                    + // [5] minute
    ':([0-9][0-9])'                    + // [6] second
    '(?:\\.([0-9]*))?'                 + // [7] fraction
    '(?:[ \\t]*(Z|([-+])([0-9][0-9]?)' + // [8] tz [9] tz_sign [10] tz_hour
    '(?::([0-9][0-9]))?))?$');           // [11] tz_minute

  function resolveYamlTimestamp(data) {
    if (data === null) return false;
    if (YAML_DATE_REGEXP.exec(data) !== null) return true;
    if (YAML_TIMESTAMP_REGEXP.exec(data) !== null) return true;
    return false;
  }

  function constructYamlTimestamp(data) {
    var match, year, month, day, hour, minute, second, fraction = 0,
        delta = null, tz_hour, tz_minute, date;

    match = YAML_DATE_REGEXP.exec(data);
    if (match === null) match = YAML_TIMESTAMP_REGEXP.exec(data);

    if (match === null) throw new Error('Date resolve error');

    // match: [1] year [2] month [3] day

    year = +(match[1]);
    month = +(match[2]) - 1; // JS month starts with 0
    day = +(match[3]);

    if (!match[4]) { // no hour
      return new Date(Date.UTC(year, month, day));
    }

    // match: [4] hour [5] minute [6] second [7] fraction

    hour = +(match[4]);
    minute = +(match[5]);
    second = +(match[6]);

    if (match[7]) {
      fraction = match[7].slice(0, 3);
      while (fraction.length < 3) { // milli-seconds
        fraction += '0';
      }
      fraction = +fraction;
    }

    // match: [8] tz [9] tz_sign [10] tz_hour [11] tz_minute

    if (match[9]) {
      tz_hour = +(match[10]);
      tz_minute = +(match[11] || 0);
      delta = (tz_hour * 60 + tz_minute) * 60000; // delta in mili-seconds
      if (match[9] === '-') delta = -delta;
    }

    date = new Date(Date.UTC(year, month, day, hour, minute, second, fraction));

    if (delta) date.setTime(date.getTime() - delta);

    return date;
  }

  function representYamlTimestamp(object /*, style*/) {
    return object.toISOString();
  }

  var timestamp = new type('tag:yaml.org,2002:timestamp', {
    kind: 'scalar',
    resolve: resolveYamlTimestamp,
    construct: constructYamlTimestamp,
    instanceOf: Date,
    represent: representYamlTimestamp
  });

  function resolveYamlMerge(data) {
    return data === '<<' || data === null;
  }

  var merge = new type('tag:yaml.org,2002:merge', {
    kind: 'scalar',
    resolve: resolveYamlMerge
  });

  /*eslint-disable no-bitwise*/





  // [ 64, 65, 66 ] -> [ padding, CR, LF ]
  var BASE64_MAP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n\r';


  function resolveYamlBinary(data) {
    if (data === null) return false;

    var code, idx, bitlen = 0, max = data.length, map = BASE64_MAP;

    // Convert one by one.
    for (idx = 0; idx < max; idx++) {
      code = map.indexOf(data.charAt(idx));

      // Skip CR/LF
      if (code > 64) continue;

      // Fail on illegal characters
      if (code < 0) return false;

      bitlen += 6;
    }

    // If there are any bits left, source was corrupted
    return (bitlen % 8) === 0;
  }

  function constructYamlBinary(data) {
    var idx, tailbits,
        input = data.replace(/[\r\n=]/g, ''), // remove CR/LF & padding to simplify scan
        max = input.length,
        map = BASE64_MAP,
        bits = 0,
        result = [];

    // Collect by 6*4 bits (3 bytes)

    for (idx = 0; idx < max; idx++) {
      if ((idx % 4 === 0) && idx) {
        result.push((bits >> 16) & 0xFF);
        result.push((bits >> 8) & 0xFF);
        result.push(bits & 0xFF);
      }

      bits = (bits << 6) | map.indexOf(input.charAt(idx));
    }

    // Dump tail

    tailbits = (max % 4) * 6;

    if (tailbits === 0) {
      result.push((bits >> 16) & 0xFF);
      result.push((bits >> 8) & 0xFF);
      result.push(bits & 0xFF);
    } else if (tailbits === 18) {
      result.push((bits >> 10) & 0xFF);
      result.push((bits >> 2) & 0xFF);
    } else if (tailbits === 12) {
      result.push((bits >> 4) & 0xFF);
    }

    return new Uint8Array(result);
  }

  function representYamlBinary(object /*, style*/) {
    var result = '', bits = 0, idx, tail,
        max = object.length,
        map = BASE64_MAP;

    // Convert every three bytes to 4 ASCII characters.

    for (idx = 0; idx < max; idx++) {
      if ((idx % 3 === 0) && idx) {
        result += map[(bits >> 18) & 0x3F];
        result += map[(bits >> 12) & 0x3F];
        result += map[(bits >> 6) & 0x3F];
        result += map[bits & 0x3F];
      }

      bits = (bits << 8) + object[idx];
    }

    // Dump tail

    tail = max % 3;

    if (tail === 0) {
      result += map[(bits >> 18) & 0x3F];
      result += map[(bits >> 12) & 0x3F];
      result += map[(bits >> 6) & 0x3F];
      result += map[bits & 0x3F];
    } else if (tail === 2) {
      result += map[(bits >> 10) & 0x3F];
      result += map[(bits >> 4) & 0x3F];
      result += map[(bits << 2) & 0x3F];
      result += map[64];
    } else if (tail === 1) {
      result += map[(bits >> 2) & 0x3F];
      result += map[(bits << 4) & 0x3F];
      result += map[64];
      result += map[64];
    }

    return result;
  }

  function isBinary(obj) {
    return Object.prototype.toString.call(obj) ===  '[object Uint8Array]';
  }

  var binary = new type('tag:yaml.org,2002:binary', {
    kind: 'scalar',
    resolve: resolveYamlBinary,
    construct: constructYamlBinary,
    predicate: isBinary,
    represent: representYamlBinary
  });

  var _hasOwnProperty$3 = Object.prototype.hasOwnProperty;
  var _toString$2       = Object.prototype.toString;

  function resolveYamlOmap(data) {
    if (data === null) return true;

    var objectKeys = [], index, length, pair, pairKey, pairHasKey,
        object = data;

    for (index = 0, length = object.length; index < length; index += 1) {
      pair = object[index];
      pairHasKey = false;

      if (_toString$2.call(pair) !== '[object Object]') return false;

      for (pairKey in pair) {
        if (_hasOwnProperty$3.call(pair, pairKey)) {
          if (!pairHasKey) pairHasKey = true;
          else return false;
        }
      }

      if (!pairHasKey) return false;

      if (objectKeys.indexOf(pairKey) === -1) objectKeys.push(pairKey);
      else return false;
    }

    return true;
  }

  function constructYamlOmap(data) {
    return data !== null ? data : [];
  }

  var omap = new type('tag:yaml.org,2002:omap', {
    kind: 'sequence',
    resolve: resolveYamlOmap,
    construct: constructYamlOmap
  });

  var _toString$1 = Object.prototype.toString;

  function resolveYamlPairs(data) {
    if (data === null) return true;

    var index, length, pair, keys, result,
        object = data;

    result = new Array(object.length);

    for (index = 0, length = object.length; index < length; index += 1) {
      pair = object[index];

      if (_toString$1.call(pair) !== '[object Object]') return false;

      keys = Object.keys(pair);

      if (keys.length !== 1) return false;

      result[index] = [ keys[0], pair[keys[0]] ];
    }

    return true;
  }

  function constructYamlPairs(data) {
    if (data === null) return [];

    var index, length, pair, keys, result,
        object = data;

    result = new Array(object.length);

    for (index = 0, length = object.length; index < length; index += 1) {
      pair = object[index];

      keys = Object.keys(pair);

      result[index] = [ keys[0], pair[keys[0]] ];
    }

    return result;
  }

  var pairs = new type('tag:yaml.org,2002:pairs', {
    kind: 'sequence',
    resolve: resolveYamlPairs,
    construct: constructYamlPairs
  });

  var _hasOwnProperty$2 = Object.prototype.hasOwnProperty;

  function resolveYamlSet(data) {
    if (data === null) return true;

    var key, object = data;

    for (key in object) {
      if (_hasOwnProperty$2.call(object, key)) {
        if (object[key] !== null) return false;
      }
    }

    return true;
  }

  function constructYamlSet(data) {
    return data !== null ? data : {};
  }

  var set = new type('tag:yaml.org,2002:set', {
    kind: 'mapping',
    resolve: resolveYamlSet,
    construct: constructYamlSet
  });

  var _default = core.extend({
    implicit: [
      timestamp,
      merge
    ],
    explicit: [
      binary,
      omap,
      pairs,
      set
    ]
  });

  /*eslint-disable max-len,no-use-before-define*/







  var _hasOwnProperty$1 = Object.prototype.hasOwnProperty;


  var CONTEXT_FLOW_IN   = 1;
  var CONTEXT_FLOW_OUT  = 2;
  var CONTEXT_BLOCK_IN  = 3;
  var CONTEXT_BLOCK_OUT = 4;


  var CHOMPING_CLIP  = 1;
  var CHOMPING_STRIP = 2;
  var CHOMPING_KEEP  = 3;


  var PATTERN_NON_PRINTABLE         = /[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x84\x86-\x9F\uFFFE\uFFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
  var PATTERN_NON_ASCII_LINE_BREAKS = /[\x85\u2028\u2029]/;
  var PATTERN_FLOW_INDICATORS       = /[,\[\]\{\}]/;
  var PATTERN_TAG_HANDLE            = /^(?:!|!!|![a-z\-]+!)$/i;
  var PATTERN_TAG_URI               = /^(?:!|[^,\[\]\{\}])(?:%[0-9a-f]{2}|[0-9a-z\-#;\/\?:@&=\+\$,_\.!~\*'\(\)\[\]])*$/i;


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

  function is_EOL(c) {
    return (c === 0x0A/* LF */) || (c === 0x0D/* CR */);
  }

  function is_WHITE_SPACE(c) {
    return (c === 0x09/* Tab */) || (c === 0x20/* Space */);
  }

  function is_WS_OR_EOL(c) {
    return (c === 0x09/* Tab */) ||
           (c === 0x20/* Space */) ||
           (c === 0x0A/* LF */) ||
           (c === 0x0D/* CR */);
  }

  function is_FLOW_INDICATOR(c) {
    return c === 0x2C/* , */ ||
           c === 0x5B/* [ */ ||
           c === 0x5D/* ] */ ||
           c === 0x7B/* { */ ||
           c === 0x7D/* } */;
  }

  function fromHexCode(c) {
    var lc;

    if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
      return c - 0x30;
    }

    /*eslint-disable no-bitwise*/
    lc = c | 0x20;

    if ((0x61/* a */ <= lc) && (lc <= 0x66/* f */)) {
      return lc - 0x61 + 10;
    }

    return -1;
  }

  function escapedHexLen(c) {
    if (c === 0x78/* x */) { return 2; }
    if (c === 0x75/* u */) { return 4; }
    if (c === 0x55/* U */) { return 8; }
    return 0;
  }

  function fromDecimalCode(c) {
    if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
      return c - 0x30;
    }

    return -1;
  }

  function simpleEscapeSequence(c) {
    /* eslint-disable indent */
    return (c === 0x30/* 0 */) ? '\x00' :
          (c === 0x61/* a */) ? '\x07' :
          (c === 0x62/* b */) ? '\x08' :
          (c === 0x74/* t */) ? '\x09' :
          (c === 0x09/* Tab */) ? '\x09' :
          (c === 0x6E/* n */) ? '\x0A' :
          (c === 0x76/* v */) ? '\x0B' :
          (c === 0x66/* f */) ? '\x0C' :
          (c === 0x72/* r */) ? '\x0D' :
          (c === 0x65/* e */) ? '\x1B' :
          (c === 0x20/* Space */) ? ' ' :
          (c === 0x22/* " */) ? '\x22' :
          (c === 0x2F/* / */) ? '/' :
          (c === 0x5C/* \ */) ? '\x5C' :
          (c === 0x4E/* N */) ? '\x85' :
          (c === 0x5F/* _ */) ? '\xA0' :
          (c === 0x4C/* L */) ? '\u2028' :
          (c === 0x50/* P */) ? '\u2029' : '';
  }

  function charFromCodepoint(c) {
    if (c <= 0xFFFF) {
      return String.fromCharCode(c);
    }
    // Encode UTF-16 surrogate pair
    // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF
    return String.fromCharCode(
      ((c - 0x010000) >> 10) + 0xD800,
      ((c - 0x010000) & 0x03FF) + 0xDC00
    );
  }

  var simpleEscapeCheck = new Array(256); // integer, for fast access
  var simpleEscapeMap = new Array(256);
  for (var i = 0; i < 256; i++) {
    simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;
    simpleEscapeMap[i] = simpleEscapeSequence(i);
  }


  function State$1(input, options) {
    this.input = input;

    this.filename  = options['filename']  || null;
    this.schema    = options['schema']    || _default;
    this.onWarning = options['onWarning'] || null;
    // (Hidden) Remove? makes the loader to expect YAML 1.1 documents
    // if such documents have no explicit %YAML directive
    this.legacy    = options['legacy']    || false;

    this.json      = options['json']      || false;
    this.listener  = options['listener']  || null;

    this.implicitTypes = this.schema.compiledImplicit;
    this.typeMap       = this.schema.compiledTypeMap;

    this.length     = input.length;
    this.position   = 0;
    this.line       = 0;
    this.lineStart  = 0;
    this.lineIndent = 0;

    // position of first leading tab in the current line,
    // used to make sure there are no tabs in the indentation
    this.firstTabInLine = -1;

    this.documents = [];

    /*
    this.version;
    this.checkLineBreaks;
    this.tagMap;
    this.anchorMap;
    this.tag;
    this.anchor;
    this.kind;
    this.result;*/

  }


  function generateError(state, message) {
    var mark = {
      name:     state.filename,
      buffer:   state.input.slice(0, -1), // omit trailing \0
      position: state.position,
      line:     state.line,
      column:   state.position - state.lineStart
    };

    mark.snippet = snippet(mark);

    return new exception(message, mark);
  }

  function throwError(state, message) {
    throw generateError(state, message);
  }

  function throwWarning(state, message) {
    if (state.onWarning) {
      state.onWarning.call(null, generateError(state, message));
    }
  }


  var directiveHandlers = {

    YAML: function handleYamlDirective(state, name, args) {

      var match, major, minor;

      if (state.version !== null) {
        throwError(state, 'duplication of %YAML directive');
      }

      if (args.length !== 1) {
        throwError(state, 'YAML directive accepts exactly one argument');
      }

      match = /^([0-9]+)\.([0-9]+)$/.exec(args[0]);

      if (match === null) {
        throwError(state, 'ill-formed argument of the YAML directive');
      }

      major = parseInt(match[1], 10);
      minor = parseInt(match[2], 10);

      if (major !== 1) {
        throwError(state, 'unacceptable YAML version of the document');
      }

      state.version = args[0];
      state.checkLineBreaks = (minor < 2);

      if (minor !== 1 && minor !== 2) {
        throwWarning(state, 'unsupported YAML version of the document');
      }
    },

    TAG: function handleTagDirective(state, name, args) {

      var handle, prefix;

      if (args.length !== 2) {
        throwError(state, 'TAG directive accepts exactly two arguments');
      }

      handle = args[0];
      prefix = args[1];

      if (!PATTERN_TAG_HANDLE.test(handle)) {
        throwError(state, 'ill-formed tag handle (first argument) of the TAG directive');
      }

      if (_hasOwnProperty$1.call(state.tagMap, handle)) {
        throwError(state, 'there is a previously declared suffix for "' + handle + '" tag handle');
      }

      if (!PATTERN_TAG_URI.test(prefix)) {
        throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive');
      }

      try {
        prefix = decodeURIComponent(prefix);
      } catch (err) {
        throwError(state, 'tag prefix is malformed: ' + prefix);
      }

      state.tagMap[handle] = prefix;
    }
  };


  function captureSegment(state, start, end, checkJson) {
    var _position, _length, _character, _result;

    if (start < end) {
      _result = state.input.slice(start, end);

      if (checkJson) {
        for (_position = 0, _length = _result.length; _position < _length; _position += 1) {
          _character = _result.charCodeAt(_position);
          if (!(_character === 0x09 ||
                (0x20 <= _character && _character <= 0x10FFFF))) {
            throwError(state, 'expected valid JSON character');
          }
        }
      } else if (PATTERN_NON_PRINTABLE.test(_result)) {
        throwError(state, 'the stream contains non-printable characters');
      }

      state.result += _result;
    }
  }

  function mergeMappings(state, destination, source, overridableKeys) {
    var sourceKeys, key, index, quantity;

    if (!common.isObject(source)) {
      throwError(state, 'cannot merge mappings; the provided source object is unacceptable');
    }

    sourceKeys = Object.keys(source);

    for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) {
      key = sourceKeys[index];

      if (!_hasOwnProperty$1.call(destination, key)) {
        destination[key] = source[key];
        overridableKeys[key] = true;
      }
    }
  }

  function storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode,
    startLine, startLineStart, startPos) {

    var index, quantity;

    // The output is a plain object here, so keys can only be strings.
    // We need to convert keyNode to a string, but doing so can hang the process
    // (deeply nested arrays that explode exponentially using aliases).
    if (Array.isArray(keyNode)) {
      keyNode = Array.prototype.slice.call(keyNode);

      for (index = 0, quantity = keyNode.length; index < quantity; index += 1) {
        if (Array.isArray(keyNode[index])) {
          throwError(state, 'nested arrays are not supported inside keys');
        }

        if (typeof keyNode === 'object' && _class(keyNode[index]) === '[object Object]') {
          keyNode[index] = '[object Object]';
        }
      }
    }

    // Avoid code execution in load() via toString property
    // (still use its own toString for arrays, timestamps,
    // and whatever user schema extensions happen to have @@toStringTag)
    if (typeof keyNode === 'object' && _class(keyNode) === '[object Object]') {
      keyNode = '[object Object]';
    }


    keyNode = String(keyNode);

    if (_result === null) {
      _result = {};
    }

    if (keyTag === 'tag:yaml.org,2002:merge') {
      if (Array.isArray(valueNode)) {
        for (index = 0, quantity = valueNode.length; index < quantity; index += 1) {
          mergeMappings(state, _result, valueNode[index], overridableKeys);
        }
      } else {
        mergeMappings(state, _result, valueNode, overridableKeys);
      }
    } else {
      if (!state.json &&
          !_hasOwnProperty$1.call(overridableKeys, keyNode) &&
          _hasOwnProperty$1.call(_result, keyNode)) {
        state.line = startLine || state.line;
        state.lineStart = startLineStart || state.lineStart;
        state.position = startPos || state.position;
        throwError(state, 'duplicated mapping key');
      }

      // used for this specific key only because Object.defineProperty is slow
      if (keyNode === '__proto__') {
        Object.defineProperty(_result, keyNode, {
          configurable: true,
          enumerable: true,
          writable: true,
          value: valueNode
        });
      } else {
        _result[keyNode] = valueNode;
      }
      delete overridableKeys[keyNode];
    }

    return _result;
  }

  function readLineBreak(state) {
    var ch;

    ch = state.input.charCodeAt(state.position);

    if (ch === 0x0A/* LF */) {
      state.position++;
    } else if (ch === 0x0D/* CR */) {
      state.position++;
      if (state.input.charCodeAt(state.position) === 0x0A/* LF */) {
        state.position++;
      }
    } else {
      throwError(state, 'a line break is expected');
    }

    state.line += 1;
    state.lineStart = state.position;
    state.firstTabInLine = -1;
  }

  function skipSeparationSpace(state, allowComments, checkIndent) {
    var lineBreaks = 0,
        ch = state.input.charCodeAt(state.position);

    while (ch !== 0) {
      while (is_WHITE_SPACE(ch)) {
        if (ch === 0x09/* Tab */ && state.firstTabInLine === -1) {
          state.firstTabInLine = state.position;
        }
        ch = state.input.charCodeAt(++state.position);
      }

      if (allowComments && ch === 0x23/* # */) {
        do {
          ch = state.input.charCodeAt(++state.position);
        } while (ch !== 0x0A/* LF */ && ch !== 0x0D/* CR */ && ch !== 0);
      }

      if (is_EOL(ch)) {
        readLineBreak(state);

        ch = state.input.charCodeAt(state.position);
        lineBreaks++;
        state.lineIndent = 0;

        while (ch === 0x20/* Space */) {
          state.lineIndent++;
          ch = state.input.charCodeAt(++state.position);
        }
      } else {
        break;
      }
    }

    if (checkIndent !== -1 && lineBreaks !== 0 && state.lineIndent < checkIndent) {
      throwWarning(state, 'deficient indentation');
    }

    return lineBreaks;
  }

  function testDocumentSeparator(state) {
    var _position = state.position,
        ch;

    ch = state.input.charCodeAt(_position);

    // Condition state.position === state.lineStart is tested
    // in parent on each call, for efficiency. No needs to test here again.
    if ((ch === 0x2D/* - */ || ch === 0x2E/* . */) &&
        ch === state.input.charCodeAt(_position + 1) &&
        ch === state.input.charCodeAt(_position + 2)) {

      _position += 3;

      ch = state.input.charCodeAt(_position);

      if (ch === 0 || is_WS_OR_EOL(ch)) {
        return true;
      }
    }

    return false;
  }

  function writeFoldedLines(state, count) {
    if (count === 1) {
      state.result += ' ';
    } else if (count > 1) {
      state.result += common.repeat('\n', count - 1);
    }
  }


  function readPlainScalar(state, nodeIndent, withinFlowCollection) {
    var preceding,
        following,
        captureStart,
        captureEnd,
        hasPendingContent,
        _line,
        _lineStart,
        _lineIndent,
        _kind = state.kind,
        _result = state.result,
        ch;

    ch = state.input.charCodeAt(state.position);

    if (is_WS_OR_EOL(ch)      ||
        is_FLOW_INDICATOR(ch) ||
        ch === 0x23/* # */    ||
        ch === 0x26/* & */    ||
        ch === 0x2A/* * */    ||
        ch === 0x21/* ! */    ||
        ch === 0x7C/* | */    ||
        ch === 0x3E/* > */    ||
        ch === 0x27/* ' */    ||
        ch === 0x22/* " */    ||
        ch === 0x25/* % */    ||
        ch === 0x40/* @ */    ||
        ch === 0x60/* ` */) {
      return false;
    }

    if (ch === 0x3F/* ? */ || ch === 0x2D/* - */) {
      following = state.input.charCodeAt(state.position + 1);

      if (is_WS_OR_EOL(following) ||
          withinFlowCollection && is_FLOW_INDICATOR(following)) {
        return false;
      }
    }

    state.kind = 'scalar';
    state.result = '';
    captureStart = captureEnd = state.position;
    hasPendingContent = false;

    while (ch !== 0) {
      if (ch === 0x3A/* : */) {
        following = state.input.charCodeAt(state.position + 1);

        if (is_WS_OR_EOL(following) ||
            withinFlowCollection && is_FLOW_INDICATOR(following)) {
          break;
        }

      } else if (ch === 0x23/* # */) {
        preceding = state.input.charCodeAt(state.position - 1);

        if (is_WS_OR_EOL(preceding)) {
          break;
        }

      } else if ((state.position === state.lineStart && testDocumentSeparator(state)) ||
                 withinFlowCollection && is_FLOW_INDICATOR(ch)) {
        break;

      } else if (is_EOL(ch)) {
        _line = state.line;
        _lineStart = state.lineStart;
        _lineIndent = state.lineIndent;
        skipSeparationSpace(state, false, -1);

        if (state.lineIndent >= nodeIndent) {
          hasPendingContent = true;
          ch = state.input.charCodeAt(state.position);
          continue;
        } else {
          state.position = captureEnd;
          state.line = _line;
          state.lineStart = _lineStart;
          state.lineIndent = _lineIndent;
          break;
        }
      }

      if (hasPendingContent) {
        captureSegment(state, captureStart, captureEnd, false);
        writeFoldedLines(state, state.line - _line);
        captureStart = captureEnd = state.position;
        hasPendingContent = false;
      }

      if (!is_WHITE_SPACE(ch)) {
        captureEnd = state.position + 1;
      }

      ch = state.input.charCodeAt(++state.position);
    }

    captureSegment(state, captureStart, captureEnd, false);

    if (state.result) {
      return true;
    }

    state.kind = _kind;
    state.result = _result;
    return false;
  }

  function readSingleQuotedScalar(state, nodeIndent) {
    var ch,
        captureStart, captureEnd;

    ch = state.input.charCodeAt(state.position);

    if (ch !== 0x27/* ' */) {
      return false;
    }

    state.kind = 'scalar';
    state.result = '';
    state.position++;
    captureStart = captureEnd = state.position;

    while ((ch = state.input.charCodeAt(state.position)) !== 0) {
      if (ch === 0x27/* ' */) {
        captureSegment(state, captureStart, state.position, true);
        ch = state.input.charCodeAt(++state.position);

        if (ch === 0x27/* ' */) {
          captureStart = state.position;
          state.position++;
          captureEnd = state.position;
        } else {
          return true;
        }

      } else if (is_EOL(ch)) {
        captureSegment(state, captureStart, captureEnd, true);
        writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
        captureStart = captureEnd = state.position;

      } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
        throwError(state, 'unexpected end of the document within a single quoted scalar');

      } else {
        state.position++;
        captureEnd = state.position;
      }
    }

    throwError(state, 'unexpected end of the stream within a single quoted scalar');
  }

  function readDoubleQuotedScalar(state, nodeIndent) {
    var captureStart,
        captureEnd,
        hexLength,
        hexResult,
        tmp,
        ch;

    ch = state.input.charCodeAt(state.position);

    if (ch !== 0x22/* " */) {
      return false;
    }

    state.kind = 'scalar';
    state.result = '';
    state.position++;
    captureStart = captureEnd = state.position;

    while ((ch = state.input.charCodeAt(state.position)) !== 0) {
      if (ch === 0x22/* " */) {
        captureSegment(state, captureStart, state.position, true);
        state.position++;
        return true;

      } else if (ch === 0x5C/* \ */) {
        captureSegment(state, captureStart, state.position, true);
        ch = state.input.charCodeAt(++state.position);

        if (is_EOL(ch)) {
          skipSeparationSpace(state, false, nodeIndent);

          // TODO: rework to inline fn with no type cast?
        } else if (ch < 256 && simpleEscapeCheck[ch]) {
          state.result += simpleEscapeMap[ch];
          state.position++;

        } else if ((tmp = escapedHexLen(ch)) > 0) {
          hexLength = tmp;
          hexResult = 0;

          for (; hexLength > 0; hexLength--) {
            ch = state.input.charCodeAt(++state.position);

            if ((tmp = fromHexCode(ch)) >= 0) {
              hexResult = (hexResult << 4) + tmp;

            } else {
              throwError(state, 'expected hexadecimal character');
            }
          }

          state.result += charFromCodepoint(hexResult);

          state.position++;

        } else {
          throwError(state, 'unknown escape sequence');
        }

        captureStart = captureEnd = state.position;

      } else if (is_EOL(ch)) {
        captureSegment(state, captureStart, captureEnd, true);
        writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
        captureStart = captureEnd = state.position;

      } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
        throwError(state, 'unexpected end of the document within a double quoted scalar');

      } else {
        state.position++;
        captureEnd = state.position;
      }
    }

    throwError(state, 'unexpected end of the stream within a double quoted scalar');
  }

  function readFlowCollection(state, nodeIndent) {
    var readNext = true,
        _line,
        _lineStart,
        _pos,
        _tag     = state.tag,
        _result,
        _anchor  = state.anchor,
        following,
        terminator,
        isPair,
        isExplicitPair,
        isMapping,
        overridableKeys = Object.create(null),
        keyNode,
        keyTag,
        valueNode,
        ch;

    ch = state.input.charCodeAt(state.position);

    if (ch === 0x5B/* [ */) {
      terminator = 0x5D;/* ] */
      isMapping = false;
      _result = [];
    } else if (ch === 0x7B/* { */) {
      terminator = 0x7D;/* } */
      isMapping = true;
      _result = {};
    } else {
      return false;
    }

    if (state.anchor !== null) {
      state.anchorMap[state.anchor] = _result;
    }

    ch = state.input.charCodeAt(++state.position);

    while (ch !== 0) {
      skipSeparationSpace(state, true, nodeIndent);

      ch = state.input.charCodeAt(state.position);

      if (ch === terminator) {
        state.position++;
        state.tag = _tag;
        state.anchor = _anchor;
        state.kind = isMapping ? 'mapping' : 'sequence';
        state.result = _result;
        return true;
      } else if (!readNext) {
        throwError(state, 'missed comma between flow collection entries');
      } else if (ch === 0x2C/* , */) {
        // "flow collection entries can never be completely empty", as per YAML 1.2, section 7.4
        throwError(state, "expected the node content, but found ','");
      }

      keyTag = keyNode = valueNode = null;
      isPair = isExplicitPair = false;

      if (ch === 0x3F/* ? */) {
        following = state.input.charCodeAt(state.position + 1);

        if (is_WS_OR_EOL(following)) {
          isPair = isExplicitPair = true;
          state.position++;
          skipSeparationSpace(state, true, nodeIndent);
        }
      }

      _line = state.line; // Save the current line.
      _lineStart = state.lineStart;
      _pos = state.position;
      composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
      keyTag = state.tag;
      keyNode = state.result;
      skipSeparationSpace(state, true, nodeIndent);

      ch = state.input.charCodeAt(state.position);

      if ((isExplicitPair || state.line === _line) && ch === 0x3A/* : */) {
        isPair = true;
        ch = state.input.charCodeAt(++state.position);
        skipSeparationSpace(state, true, nodeIndent);
        composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
        valueNode = state.result;
      }

      if (isMapping) {
        storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode, _line, _lineStart, _pos);
      } else if (isPair) {
        _result.push(storeMappingPair(state, null, overridableKeys, keyTag, keyNode, valueNode, _line, _lineStart, _pos));
      } else {
        _result.push(keyNode);
      }

      skipSeparationSpace(state, true, nodeIndent);

      ch = state.input.charCodeAt(state.position);

      if (ch === 0x2C/* , */) {
        readNext = true;
        ch = state.input.charCodeAt(++state.position);
      } else {
        readNext = false;
      }
    }

    throwError(state, 'unexpected end of the stream within a flow collection');
  }

  function readBlockScalar(state, nodeIndent) {
    var captureStart,
        folding,
        chomping       = CHOMPING_CLIP,
        didReadContent = false,
        detectedIndent = false,
        textIndent     = nodeIndent,
        emptyLines     = 0,
        atMoreIndented = false,
        tmp,
        ch;

    ch = state.input.charCodeAt(state.position);

    if (ch === 0x7C/* | */) {
      folding = false;
    } else if (ch === 0x3E/* > */) {
      folding = true;
    } else {
      return false;
    }

    state.kind = 'scalar';
    state.result = '';

    while (ch !== 0) {
      ch = state.input.charCodeAt(++state.position);

      if (ch === 0x2B/* + */ || ch === 0x2D/* - */) {
        if (CHOMPING_CLIP === chomping) {
          chomping = (ch === 0x2B/* + */) ? CHOMPING_KEEP : CHOMPING_STRIP;
        } else {
          throwError(state, 'repeat of a chomping mode identifier');
        }

      } else if ((tmp = fromDecimalCode(ch)) >= 0) {
        if (tmp === 0) {
          throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one');
        } else if (!detectedIndent) {
          textIndent = nodeIndent + tmp - 1;
          detectedIndent = true;
        } else {
          throwError(state, 'repeat of an indentation width identifier');
        }

      } else {
        break;
      }
    }

    if (is_WHITE_SPACE(ch)) {
      do { ch = state.input.charCodeAt(++state.position); }
      while (is_WHITE_SPACE(ch));

      if (ch === 0x23/* # */) {
        do { ch = state.input.charCodeAt(++state.position); }
        while (!is_EOL(ch) && (ch !== 0));
      }
    }

    while (ch !== 0) {
      readLineBreak(state);
      state.lineIndent = 0;

      ch = state.input.charCodeAt(state.position);

      while ((!detectedIndent || state.lineIndent < textIndent) &&
             (ch === 0x20/* Space */)) {
        state.lineIndent++;
        ch = state.input.charCodeAt(++state.position);
      }

      if (!detectedIndent && state.lineIndent > textIndent) {
        textIndent = state.lineIndent;
      }

      if (is_EOL(ch)) {
        emptyLines++;
        continue;
      }

      // End of the scalar.
      if (state.lineIndent < textIndent) {

        // Perform the chomping.
        if (chomping === CHOMPING_KEEP) {
          state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
        } else if (chomping === CHOMPING_CLIP) {
          if (didReadContent) { // i.e. only if the scalar is not empty.
            state.result += '\n';
          }
        }

        // Break this `while` cycle and go to the funciton's epilogue.
        break;
      }

      // Folded style: use fancy rules to handle line breaks.
      if (folding) {

        // Lines starting with white space characters (more-indented lines) are not folded.
        if (is_WHITE_SPACE(ch)) {
          atMoreIndented = true;
          // except for the first content line (cf. Example 8.1)
          state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);

        // End of more-indented block.
        } else if (atMoreIndented) {
          atMoreIndented = false;
          state.result += common.repeat('\n', emptyLines + 1);

        // Just one line break - perceive as the same line.
        } else if (emptyLines === 0) {
          if (didReadContent) { // i.e. only if we have already read some scalar content.
            state.result += ' ';
          }

        // Several line breaks - perceive as different lines.
        } else {
          state.result += common.repeat('\n', emptyLines);
        }

      // Literal style: just add exact number of line breaks between content lines.
      } else {
        // Keep all line breaks except the header line break.
        state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
      }

      didReadContent = true;
      detectedIndent = true;
      emptyLines = 0;
      captureStart = state.position;

      while (!is_EOL(ch) && (ch !== 0)) {
        ch = state.input.charCodeAt(++state.position);
      }

      captureSegment(state, captureStart, state.position, false);
    }

    return true;
  }

  function readBlockSequence(state, nodeIndent) {
    var _line,
        _tag      = state.tag,
        _anchor   = state.anchor,
        _result   = [],
        following,
        detected  = false,
        ch;

    // there is a leading tab before this token, so it can't be a block sequence/mapping;
    // it can still be flow sequence/mapping or a scalar
    if (state.firstTabInLine !== -1) return false;

    if (state.anchor !== null) {
      state.anchorMap[state.anchor] = _result;
    }

    ch = state.input.charCodeAt(state.position);

    while (ch !== 0) {
      if (state.firstTabInLine !== -1) {
        state.position = state.firstTabInLine;
        throwError(state, 'tab characters must not be used in indentation');
      }

      if (ch !== 0x2D/* - */) {
        break;
      }

      following = state.input.charCodeAt(state.position + 1);

      if (!is_WS_OR_EOL(following)) {
        break;
      }

      detected = true;
      state.position++;

      if (skipSeparationSpace(state, true, -1)) {
        if (state.lineIndent <= nodeIndent) {
          _result.push(null);
          ch = state.input.charCodeAt(state.position);
          continue;
        }
      }

      _line = state.line;
      composeNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true);
      _result.push(state.result);
      skipSeparationSpace(state, true, -1);

      ch = state.input.charCodeAt(state.position);

      if ((state.line === _line || state.lineIndent > nodeIndent) && (ch !== 0)) {
        throwError(state, 'bad indentation of a sequence entry');
      } else if (state.lineIndent < nodeIndent) {
        break;
      }
    }

    if (detected) {
      state.tag = _tag;
      state.anchor = _anchor;
      state.kind = 'sequence';
      state.result = _result;
      return true;
    }
    return false;
  }

  function readBlockMapping(state, nodeIndent, flowIndent) {
    var following,
        allowCompact,
        _line,
        _keyLine,
        _keyLineStart,
        _keyPos,
        _tag          = state.tag,
        _anchor       = state.anchor,
        _result       = {},
        overridableKeys = Object.create(null),
        keyTag        = null,
        keyNode       = null,
        valueNode     = null,
        atExplicitKey = false,
        detected      = false,
        ch;

    // there is a leading tab before this token, so it can't be a block sequence/mapping;
    // it can still be flow sequence/mapping or a scalar
    if (state.firstTabInLine !== -1) return false;

    if (state.anchor !== null) {
      state.anchorMap[state.anchor] = _result;
    }

    ch = state.input.charCodeAt(state.position);

    while (ch !== 0) {
      if (!atExplicitKey && state.firstTabInLine !== -1) {
        state.position = state.firstTabInLine;
        throwError(state, 'tab characters must not be used in indentation');
      }

      following = state.input.charCodeAt(state.position + 1);
      _line = state.line; // Save the current line.

      //
      // Explicit notation case. There are two separate blocks:
      // first for the key (denoted by "?") and second for the value (denoted by ":")
      //
      if ((ch === 0x3F/* ? */ || ch === 0x3A/* : */) && is_WS_OR_EOL(following)) {

        if (ch === 0x3F/* ? */) {
          if (atExplicitKey) {
            storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null, _keyLine, _keyLineStart, _keyPos);
            keyTag = keyNode = valueNode = null;
          }

          detected = true;
          atExplicitKey = true;
          allowCompact = true;

        } else if (atExplicitKey) {
          // i.e. 0x3A/* : */ === character after the explicit key.
          atExplicitKey = false;
          allowCompact = true;

        } else {
          throwError(state, 'incomplete explicit mapping pair; a key node is missed; or followed by a non-tabulated empty line');
        }

        state.position += 1;
        ch = following;

      //
      // Implicit notation case. Flow-style node as the key first, then ":", and the value.
      //
      } else {
        _keyLine = state.line;
        _keyLineStart = state.lineStart;
        _keyPos = state.position;

        if (!composeNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) {
          // Neither implicit nor explicit notation.
          // Reading is done. Go to the epilogue.
          break;
        }

        if (state.line === _line) {
          ch = state.input.charCodeAt(state.position);

          while (is_WHITE_SPACE(ch)) {
            ch = state.input.charCodeAt(++state.position);
          }

          if (ch === 0x3A/* : */) {
            ch = state.input.charCodeAt(++state.position);

            if (!is_WS_OR_EOL(ch)) {
              throwError(state, 'a whitespace character is expected after the key-value separator within a block mapping');
            }

            if (atExplicitKey) {
              storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null, _keyLine, _keyLineStart, _keyPos);
              keyTag = keyNode = valueNode = null;
            }

            detected = true;
            atExplicitKey = false;
            allowCompact = false;
            keyTag = state.tag;
            keyNode = state.result;

          } else if (detected) {
            throwError(state, 'can not read an implicit mapping pair; a colon is missed');

          } else {
            state.tag = _tag;
            state.anchor = _anchor;
            return true; // Keep the result of `composeNode`.
          }

        } else if (detected) {
          throwError(state, 'can not read a block mapping entry; a multiline key may not be an implicit key');

        } else {
          state.tag = _tag;
          state.anchor = _anchor;
          return true; // Keep the result of `composeNode`.
        }
      }

      //
      // Common reading code for both explicit and implicit notations.
      //
      if (state.line === _line || state.lineIndent > nodeIndent) {
        if (atExplicitKey) {
          _keyLine = state.line;
          _keyLineStart = state.lineStart;
          _keyPos = state.position;
        }

        if (composeNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, allowCompact)) {
          if (atExplicitKey) {
            keyNode = state.result;
          } else {
            valueNode = state.result;
          }
        }

        if (!atExplicitKey) {
          storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode, _keyLine, _keyLineStart, _keyPos);
          keyTag = keyNode = valueNode = null;
        }

        skipSeparationSpace(state, true, -1);
        ch = state.input.charCodeAt(state.position);
      }

      if ((state.line === _line || state.lineIndent > nodeIndent) && (ch !== 0)) {
        throwError(state, 'bad indentation of a mapping entry');
      } else if (state.lineIndent < nodeIndent) {
        break;
      }
    }

    //
    // Epilogue.
    //

    // Special case: last mapping's node contains only the key in explicit notation.
    if (atExplicitKey) {
      storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null, _keyLine, _keyLineStart, _keyPos);
    }

    // Expose the resulting mapping.
    if (detected) {
      state.tag = _tag;
      state.anchor = _anchor;
      state.kind = 'mapping';
      state.result = _result;
    }

    return detected;
  }

  function readTagProperty(state) {
    var _position,
        isVerbatim = false,
        isNamed    = false,
        tagHandle,
        tagName,
        ch;

    ch = state.input.charCodeAt(state.position);

    if (ch !== 0x21/* ! */) return false;

    if (state.tag !== null) {
      throwError(state, 'duplication of a tag property');
    }

    ch = state.input.charCodeAt(++state.position);

    if (ch === 0x3C/* < */) {
      isVerbatim = true;
      ch = state.input.charCodeAt(++state.position);

    } else if (ch === 0x21/* ! */) {
      isNamed = true;
      tagHandle = '!!';
      ch = state.input.charCodeAt(++state.position);

    } else {
      tagHandle = '!';
    }

    _position = state.position;

    if (isVerbatim) {
      do { ch = state.input.charCodeAt(++state.position); }
      while (ch !== 0 && ch !== 0x3E/* > */);

      if (state.position < state.length) {
        tagName = state.input.slice(_position, state.position);
        ch = state.input.charCodeAt(++state.position);
      } else {
        throwError(state, 'unexpected end of the stream within a verbatim tag');
      }
    } else {
      while (ch !== 0 && !is_WS_OR_EOL(ch)) {

        if (ch === 0x21/* ! */) {
          if (!isNamed) {
            tagHandle = state.input.slice(_position - 1, state.position + 1);

            if (!PATTERN_TAG_HANDLE.test(tagHandle)) {
              throwError(state, 'named tag handle cannot contain such characters');
            }

            isNamed = true;
            _position = state.position + 1;
          } else {
            throwError(state, 'tag suffix cannot contain exclamation marks');
          }
        }

        ch = state.input.charCodeAt(++state.position);
      }

      tagName = state.input.slice(_position, state.position);

      if (PATTERN_FLOW_INDICATORS.test(tagName)) {
        throwError(state, 'tag suffix cannot contain flow indicator characters');
      }
    }

    if (tagName && !PATTERN_TAG_URI.test(tagName)) {
      throwError(state, 'tag name cannot contain such characters: ' + tagName);
    }

    try {
      tagName = decodeURIComponent(tagName);
    } catch (err) {
      throwError(state, 'tag name is malformed: ' + tagName);
    }

    if (isVerbatim) {
      state.tag = tagName;

    } else if (_hasOwnProperty$1.call(state.tagMap, tagHandle)) {
      state.tag = state.tagMap[tagHandle] + tagName;

    } else if (tagHandle === '!') {
      state.tag = '!' + tagName;

    } else if (tagHandle === '!!') {
      state.tag = 'tag:yaml.org,2002:' + tagName;

    } else {
      throwError(state, 'undeclared tag handle "' + tagHandle + '"');
    }

    return true;
  }

  function readAnchorProperty(state) {
    var _position,
        ch;

    ch = state.input.charCodeAt(state.position);

    if (ch !== 0x26/* & */) return false;

    if (state.anchor !== null) {
      throwError(state, 'duplication of an anchor property');
    }

    ch = state.input.charCodeAt(++state.position);
    _position = state.position;

    while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
      ch = state.input.charCodeAt(++state.position);
    }

    if (state.position === _position) {
      throwError(state, 'name of an anchor node must contain at least one character');
    }

    state.anchor = state.input.slice(_position, state.position);
    return true;
  }

  function readAlias(state) {
    var _position, alias,
        ch;

    ch = state.input.charCodeAt(state.position);

    if (ch !== 0x2A/* * */) return false;

    ch = state.input.charCodeAt(++state.position);
    _position = state.position;

    while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
      ch = state.input.charCodeAt(++state.position);
    }

    if (state.position === _position) {
      throwError(state, 'name of an alias node must contain at least one character');
    }

    alias = state.input.slice(_position, state.position);

    if (!_hasOwnProperty$1.call(state.anchorMap, alias)) {
      throwError(state, 'unidentified alias "' + alias + '"');
    }

    state.result = state.anchorMap[alias];
    skipSeparationSpace(state, true, -1);
    return true;
  }

  function composeNode(state, parentIndent, nodeContext, allowToSeek, allowCompact) {
    var allowBlockStyles,
        allowBlockScalars,
        allowBlockCollections,
        indentStatus = 1, // 1: this>parent, 0: this=parent, -1: this<parent
        atNewLine  = false,
        hasContent = false,
        typeIndex,
        typeQuantity,
        typeList,
        type,
        flowIndent,
        blockIndent;

    if (state.listener !== null) {
      state.listener('open', state);
    }

    state.tag    = null;
    state.anchor = null;
    state.kind   = null;
    state.result = null;

    allowBlockStyles = allowBlockScalars = allowBlockCollections =
      CONTEXT_BLOCK_OUT === nodeContext ||
      CONTEXT_BLOCK_IN  === nodeContext;

    if (allowToSeek) {
      if (skipSeparationSpace(state, true, -1)) {
        atNewLine = true;

        if (state.lineIndent > parentIndent) {
          indentStatus = 1;
        } else if (state.lineIndent === parentIndent) {
          indentStatus = 0;
        } else if (state.lineIndent < parentIndent) {
          indentStatus = -1;
        }
      }
    }

    if (indentStatus === 1) {
      while (readTagProperty(state) || readAnchorProperty(state)) {
        if (skipSeparationSpace(state, true, -1)) {
          atNewLine = true;
          allowBlockCollections = allowBlockStyles;

          if (state.lineIndent > parentIndent) {
            indentStatus = 1;
          } else if (state.lineIndent === parentIndent) {
            indentStatus = 0;
          } else if (state.lineIndent < parentIndent) {
            indentStatus = -1;
          }
        } else {
          allowBlockCollections = false;
        }
      }
    }

    if (allowBlockCollections) {
      allowBlockCollections = atNewLine || allowCompact;
    }

    if (indentStatus === 1 || CONTEXT_BLOCK_OUT === nodeContext) {
      if (CONTEXT_FLOW_IN === nodeContext || CONTEXT_FLOW_OUT === nodeContext) {
        flowIndent = parentIndent;
      } else {
        flowIndent = parentIndent + 1;
      }

      blockIndent = state.position - state.lineStart;

      if (indentStatus === 1) {
        if (allowBlockCollections &&
            (readBlockSequence(state, blockIndent) ||
             readBlockMapping(state, blockIndent, flowIndent)) ||
            readFlowCollection(state, flowIndent)) {
          hasContent = true;
        } else {
          if ((allowBlockScalars && readBlockScalar(state, flowIndent)) ||
              readSingleQuotedScalar(state, flowIndent) ||
              readDoubleQuotedScalar(state, flowIndent)) {
            hasContent = true;

          } else if (readAlias(state)) {
            hasContent = true;

            if (state.tag !== null || state.anchor !== null) {
              throwError(state, 'alias node should not have any properties');
            }

          } else if (readPlainScalar(state, flowIndent, CONTEXT_FLOW_IN === nodeContext)) {
            hasContent = true;

            if (state.tag === null) {
              state.tag = '?';
            }
          }

          if (state.anchor !== null) {
            state.anchorMap[state.anchor] = state.result;
          }
        }
      } else if (indentStatus === 0) {
        // Special case: block sequences are allowed to have same indentation level as the parent.
        // http://www.yaml.org/spec/1.2/spec.html#id2799784
        hasContent = allowBlockCollections && readBlockSequence(state, blockIndent);
      }
    }

    if (state.tag === null) {
      if (state.anchor !== null) {
        state.anchorMap[state.anchor] = state.result;
      }

    } else if (state.tag === '?') {
      // Implicit resolving is not allowed for non-scalar types, and '?'
      // non-specific tag is only automatically assigned to plain scalars.
      //
      // We only need to check kind conformity in case user explicitly assigns '?'
      // tag, for example like this: "!<?> [0]"
      //
      if (state.result !== null && state.kind !== 'scalar') {
        throwError(state, 'unacceptable node kind for !<?> tag; it should be "scalar", not "' + state.kind + '"');
      }

      for (typeIndex = 0, typeQuantity = state.implicitTypes.length; typeIndex < typeQuantity; typeIndex += 1) {
        type = state.implicitTypes[typeIndex];

        if (type.resolve(state.result)) { // `state.result` updated in resolver if matched
          state.result = type.construct(state.result);
          state.tag = type.tag;
          if (state.anchor !== null) {
            state.anchorMap[state.anchor] = state.result;
          }
          break;
        }
      }
    } else if (state.tag !== '!') {
      if (_hasOwnProperty$1.call(state.typeMap[state.kind || 'fallback'], state.tag)) {
        type = state.typeMap[state.kind || 'fallback'][state.tag];
      } else {
        // looking for multi type
        type = null;
        typeList = state.typeMap.multi[state.kind || 'fallback'];

        for (typeIndex = 0, typeQuantity = typeList.length; typeIndex < typeQuantity; typeIndex += 1) {
          if (state.tag.slice(0, typeList[typeIndex].tag.length) === typeList[typeIndex].tag) {
            type = typeList[typeIndex];
            break;
          }
        }
      }

      if (!type) {
        throwError(state, 'unknown tag !<' + state.tag + '>');
      }

      if (state.result !== null && type.kind !== state.kind) {
        throwError(state, 'unacceptable node kind for !<' + state.tag + '> tag; it should be "' + type.kind + '", not "' + state.kind + '"');
      }

      if (!type.resolve(state.result, state.tag)) { // `state.result` updated in resolver if matched
        throwError(state, 'cannot resolve a node with !<' + state.tag + '> explicit tag');
      } else {
        state.result = type.construct(state.result, state.tag);
        if (state.anchor !== null) {
          state.anchorMap[state.anchor] = state.result;
        }
      }
    }

    if (state.listener !== null) {
      state.listener('close', state);
    }
    return state.tag !== null ||  state.anchor !== null || hasContent;
  }

  function readDocument(state) {
    var documentStart = state.position,
        _position,
        directiveName,
        directiveArgs,
        hasDirectives = false,
        ch;

    state.version = null;
    state.checkLineBreaks = state.legacy;
    state.tagMap = Object.create(null);
    state.anchorMap = Object.create(null);

    while ((ch = state.input.charCodeAt(state.position)) !== 0) {
      skipSeparationSpace(state, true, -1);

      ch = state.input.charCodeAt(state.position);

      if (state.lineIndent > 0 || ch !== 0x25/* % */) {
        break;
      }

      hasDirectives = true;
      ch = state.input.charCodeAt(++state.position);
      _position = state.position;

      while (ch !== 0 && !is_WS_OR_EOL(ch)) {
        ch = state.input.charCodeAt(++state.position);
      }

      directiveName = state.input.slice(_position, state.position);
      directiveArgs = [];

      if (directiveName.length < 1) {
        throwError(state, 'directive name must not be less than one character in length');
      }

      while (ch !== 0) {
        while (is_WHITE_SPACE(ch)) {
          ch = state.input.charCodeAt(++state.position);
        }

        if (ch === 0x23/* # */) {
          do { ch = state.input.charCodeAt(++state.position); }
          while (ch !== 0 && !is_EOL(ch));
          break;
        }

        if (is_EOL(ch)) break;

        _position = state.position;

        while (ch !== 0 && !is_WS_OR_EOL(ch)) {
          ch = state.input.charCodeAt(++state.position);
        }

        directiveArgs.push(state.input.slice(_position, state.position));
      }

      if (ch !== 0) readLineBreak(state);

      if (_hasOwnProperty$1.call(directiveHandlers, directiveName)) {
        directiveHandlers[directiveName](state, directiveName, directiveArgs);
      } else {
        throwWarning(state, 'unknown document directive "' + directiveName + '"');
      }
    }

    skipSeparationSpace(state, true, -1);

    if (state.lineIndent === 0 &&
        state.input.charCodeAt(state.position)     === 0x2D/* - */ &&
        state.input.charCodeAt(state.position + 1) === 0x2D/* - */ &&
        state.input.charCodeAt(state.position + 2) === 0x2D/* - */) {
      state.position += 3;
      skipSeparationSpace(state, true, -1);

    } else if (hasDirectives) {
      throwError(state, 'directives end mark is expected');
    }

    composeNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, true);
    skipSeparationSpace(state, true, -1);

    if (state.checkLineBreaks &&
        PATTERN_NON_ASCII_LINE_BREAKS.test(state.input.slice(documentStart, state.position))) {
      throwWarning(state, 'non-ASCII line breaks are interpreted as content');
    }

    state.documents.push(state.result);

    if (state.position === state.lineStart && testDocumentSeparator(state)) {

      if (state.input.charCodeAt(state.position) === 0x2E/* . */) {
        state.position += 3;
        skipSeparationSpace(state, true, -1);
      }
      return;
    }

    if (state.position < (state.length - 1)) {
      throwError(state, 'end of the stream or a document separator is expected');
    } else {
      return;
    }
  }


  function loadDocuments(input, options) {
    input = String(input);
    options = options || {};

    if (input.length !== 0) {

      // Add tailing `\n` if not exists
      if (input.charCodeAt(input.length - 1) !== 0x0A/* LF */ &&
          input.charCodeAt(input.length - 1) !== 0x0D/* CR */) {
        input += '\n';
      }

      // Strip BOM
      if (input.charCodeAt(0) === 0xFEFF) {
        input = input.slice(1);
      }
    }

    var state = new State$1(input, options);

    var nullpos = input.indexOf('\0');

    if (nullpos !== -1) {
      state.position = nullpos;
      throwError(state, 'null byte is not allowed in input');
    }

    // Use 0 as string terminator. That significantly simplifies bounds check.
    state.input += '\0';

    while (state.input.charCodeAt(state.position) === 0x20/* Space */) {
      state.lineIndent += 1;
      state.position += 1;
    }

    while (state.position < (state.length - 1)) {
      readDocument(state);
    }

    return state.documents;
  }


  function loadAll$1(input, iterator, options) {
    if (iterator !== null && typeof iterator === 'object' && typeof options === 'undefined') {
      options = iterator;
      iterator = null;
    }

    var documents = loadDocuments(input, options);

    if (typeof iterator !== 'function') {
      return documents;
    }

    for (var index = 0, length = documents.length; index < length; index += 1) {
      iterator(documents[index]);
    }
  }


  function load$1(input, options) {
    var documents = loadDocuments(input, options);

    if (documents.length === 0) {
      /*eslint-disable no-undefined*/
      return undefined;
    } else if (documents.length === 1) {
      return documents[0];
    }
    throw new exception('expected a single document in the stream, but found more');
  }


  var loadAll_1 = loadAll$1;
  var load_1    = load$1;

  var loader = {
  	loadAll: loadAll_1,
  	load: load_1
  };
  var load                = loader.load;

  /** message language used if user-specified language is not available */
  const secondaryLang = 'en';

  /** default message language used when secondary language is not available */
  const defaultLang = 'de';

  /** characters used to separate default and secondary language strings */
  const languageSeparators = ['|', '⁄'];

  /** query selectors of elements to be observed (refreshed on each mutation) */
  const observations = {
    [`body`]: { childList: true },
    [`#viewer`]: { childList: true, subtree: true },
    [`#content`]: { childList: true, subtree: true },
    [`#rich-workspace`]: { childList: true, attributes: true },
    [`#editor-wrapper`]: { childList: true, attributes: true },
    [`.ProseMirror`]: { childList: true, subtree: true },
    [`#content-vue`]: { childList: true, subtree: true },
    [`#oc-dialog-filepicker-content`]: { childList: true, subtree: true }
  };

  /** replace these elements and strip file extensions */
  const queryReplaceWithExtension = `
  #recommendations .name,
  .breadcrumb .crumb > a,
  #controls .crumblist > a span:not([class]),
  #content .app-sidebar-header__maintitle,
  #viewer .modal-title
`;

  /** replace these elements using its children's joined text contents */
  const queryReplaceJoinChildren = `  
  #picker-filestable .filename-parts
`;

  /** replace these elements' text contents */
  const queryReplace = `
  #fileList .innernametext,
  #app-content-vue .form-title,
  #app-content-vue .question__header-title,
  #app-content-vue .question__label,
  #app-navigation-vue .app-navigation-entry__title,
  #nextcloud .header-appname
`;

  /** replace strings on the beginning of these elements */
  const queryReplaceBeginning = `
  #sharing .sharing-sharee-list h5
`;

  /** replace strings contained anywhere within these elements */
  const queryReplaceAnywhere = `
  #sharing .sharing-entry__reshare h5,
  #groups #groups-groups strong
`;

  /** replace using html instead of the text content */
  const queryReplaceHTML = `
  #editor .ProseMirror[contenteditable=false] > *
`;

  /**
   * function that initializes and continuously runs the localization based on the
   * translations provided by the passed `substitutionsUrl` and inline localized
   * strings (e.g. `deutsch | english`), according to the configuration constants
   */
  async function localization({ substitutionsUrl }) {
    /**
     * sort by string name length so substrings of other strings aren't
     * wrongly localized
     * (e.g. "test_1" -> "Test string_1" if "test" and "test_1 exist")
     */
    const sortObject = unsortedObj =>
      Object.keys(unsortedObj)
        .sort((a, b) => b.length - a.length)
        .reduce((obj, key) => ({ ...obj, [key]: unsortedObj[key] }), {});

    /**
     * expands the configuration by creating new entries according to supplied
     * `_suffix` and `_prefix` attributes
     * 
     * ```
     * { "file_name": { "_suffix": ".txt", "de": "Dateiname" }, ... }
     * =>
     * { "file_name": { ... }, "file_name.txt": { ... }, ...}
     * ```
     */
    const expandConfiguration = yamlObject =>
      Object.keys(yamlObject)
        // map object to array of { key, value } pair objects
        .map(s => ({ key: s, value: yamlObject[s] }))
        .flatMap(({ key, value }) =>
          [
            // expand any _suffix/_prefix attributes by adding those to the key
            // and creating new configuration entries
            { key, value },
            value._suffix && { key: `${key}${value._suffix}`, value },
            value._prefix && { key: `${value._prefix}${key}`, value }
          ].filter(Boolean)
        )
        .reduce((obj, { key, value }) => ({ ...obj, [key]: value }), {});

    /** downloads, parses and expands the configuration from `substitutionsUrl` */
    const fetchSubstitutions = async () => {
      const yamlResponse = await fetch(substitutionsUrl);
      const yamlString = await yamlResponse.text();
      const yamlObject = load(yamlString);

      if (typeof yamlObject !== 'object') {
        console.error('YAML configuration could not be loaded', yamlObject);
        return null
      }

      return sortObject(expandConfiguration(yamlObject))
    };

    /**
     * returns the string in the correct (or best possible) language
     * 
     * @param languages
     *  object containing the strings different languages, e.g.
     *  `{ en: 'Hello!', de: 'Hallo!', es: '¡Hola!' }`
     * @param fallbackString
     *  a string used in place of the translated string in case everything else
     *  fails, e.g. the string's name
     */
    const getLanguage = (languages, fallbackString) => {
      const userLang = document.documentElement.lang.split('-')[0]; // en-US -> en
      const firstLang = languages && Object.keys(languages)[0];
      return (
        languages[userLang] ||
        languages[secondaryLang] ||
        languages[defaultLang] ||
        languages[firstLang] ||
        fallbackString
      )
    };

    /**
     * strip file extension from file name,
     * e.g. 'hello.world..txt' => 'hello.world.'
     */
    const stripFileExtension = fileName => {
      const fileNameParts = fileName.split('.');

      // if file name has no '.', return original filename
      if (fileNameParts.length === 1) return fileName

      // don't strip file extension if last part has no length
      // (e.g. "test.md" should be stripped, but "test." should not)
      if (fileNameParts[fileNameParts.length - 1].length === 0) return fileName

      return fileNameParts.slice(0, -1).join('.')
    };

    /**
     * get desired translated string from string with separator,
     * according to global default and secondary language configurations and the
     * user's language
     * e.g. 'hallo | hello' => { de: 'hallo', en: 'hello } => 'hello' or 'hallo'
     */
    const getSplittedString = fullString => {
      const separator = languageSeparators.find(sep => fullString.includes(sep));
      const parts = fullString.split(separator).map(part => part.trim());
      const languages = {
        [defaultLang]: parts[0],
        [secondaryLang]: parts[1]
      };
      return getLanguage(languages, fullString)
    };

    /** get translated string using `substitutionsUrl` if available */
    const getString = stringName => {
      if (!stringName) return null
      if (!substitutions[stringName]) return stringName
      return getLanguage(substitutions[stringName], stringName)
    };

    const isStringName = str => Object.keys(substitutions).includes(str);

    const isSplittedString = str =>
      languageSeparators.some(sep => str.includes(sep));

    /**
     * replaces the given element with text translated using either substitutions
     * or splitted strings
     * 
     * @param withFileExtension
     *  whether the string contains a file extension to be stripped off
     * @param joinChildren
     *  whether the text is contained in the given element's children and thus
     *  should be joined before replacing text
     */
    const replaceText =
      ({ withFileExtension = false, joinChildren = false }) =>
      el => {
        const innerText = joinChildren
          ? Array.from(el.children)
              .map(c => c.innerText)
              .join('')
          : el.innerText;

        const elementHasStringName = isStringName(innerText);
        const elementHasSplittedName = isSplittedString(innerText);
        if (elementHasStringName || elementHasSplittedName) {
          const italicEl = document.createElement('i');
          const maybeStripFileExtension = fileName =>
            withFileExtension ? stripFileExtension(fileName) : fileName;
          italicEl.title = innerText;
          italicEl.innerText = elementHasSplittedName
            ? maybeStripFileExtension(getSplittedString(innerText))
            : getString(innerText);
          if (joinChildren) italicEl.classList.add('filename-parts__first');
          el.innerHTML = '';
          el.appendChild(italicEl);
        }
      };

    const replaceStringBeginning = () => el => {
      const stringName = getBeginningStringName(el);
      if (stringName) {
        const italicEl = document.createElement('i');
        italicEl.title = stringName;
        italicEl.innerText = getString(stringName);
        const textNode = document.createTextNode(
          el.innerText.replace(stringName, '')
        );
        el.innerHTML = '';
        el.appendChild(italicEl);
        el.appendChild(textNode);
      }
    };

    /**
     * 'alle_mitglieder, whatever' (text node data)
     *   =>
     * [<i>All members</i>, <span>, whatever</span>]
     */
    const createElementsFromText = text => {
      const stringName = getIncludedStringName(text);

      if (stringName) {
        const italicEl = document.createElement('i');
        italicEl.title = stringName;
        italicEl.innerText = getString(stringName);

        const stringStartIndex = text.indexOf(stringName);
        const stringEndIndex = stringStartIndex + stringName.length;

        const textStart = text.slice(0, stringStartIndex);
        const textEnd = text.slice(stringEndIndex);

        return [
          ...createElementsFromText(textStart),
          italicEl,
          ...createElementsFromText(textEnd)
        ]
      } else {
        if (text.length === 0) return []
        const spanEnd = document.createElement('span');
        spanEnd.innerText = text;
        return [spanEnd]
      }
    };

    const replaceStringAnywhere = () => el => {
      const newNodes = Array.from(el.childNodes).flatMap(node =>
        node.nodeType === Node.TEXT_NODE
          ? createElementsFromText(node.data)
          : node
      );
      el.innerHTML = '';
      newNodes.forEach(node => el.appendChild(node));
    };

    const replaceHTML = () => el => {
      if (isSplittedString(el.innerText)) {
        el.innerHTML = getSplittedString(el.innerHTML);
      }
    };

    const replaceTitle = () => {
      const titleHasSplittedFolderName = isSplittedString(document.title);

      const titleString = titleHasSplittedFolderName
        ? document.title
            .split(' - ')
            .slice(0, -2) // remove last two ("Files - Nextcloud")
            .join(' - ') // re-join folder name (might have contained " - ")
        : Object.keys(substitutions).find(stringName =>
            document.title.startsWith(stringName)
          );

      const titleText = titleHasSplittedFolderName
        ? getSplittedString(titleString)
        : getString(titleString);
      document.title = document.title.replace(titleString, titleText);
    };

    const getBeginningStringName = el =>
      Object.keys(substitutions).find(name =>
        el.innerText.trim().startsWith(name)
      );

    const getIncludedStringName = text =>
      Object.keys(substitutions).find(name => text.includes(name));

    const handleMutations = mutations => {
      replaceTitle();
      const targets = mutations ? mutations.map(m => m.target) : [document];

      targets
        .flatMap(el => Array.from(el.querySelectorAll(queryReplaceWithExtension)))
        .forEach(replaceText({ withFileExtension: true }));

      targets
        .flatMap(el => Array.from(el.querySelectorAll(queryReplaceJoinChildren)))
        .forEach(replaceText({ withFileExtension: true, joinChildren: true }));

      targets
        .flatMap(el => Array.from(el.querySelectorAll(queryReplace)))
        .forEach(replaceText({ withFileExtension: false }));

      targets
        .flatMap(el => Array.from(el.querySelectorAll(queryReplaceBeginning)))
        .forEach(replaceStringBeginning());

      targets
        .flatMap(el => Array.from(el.querySelectorAll(queryReplaceAnywhere)))
        .forEach(replaceStringAnywhere());

      targets
        .flatMap(el => Array.from(el.querySelectorAll(queryReplaceHTML)))
        .forEach(replaceHTML());

      startObservations();
    };

    const observer = new MutationObserver(handleMutations);

    const startObservations = () =>
      Object.keys(observations)
        .map(key => ({ key, elements: document.querySelectorAll(key) }))
        .filter(({ elements }) => Boolean(elements))
        .forEach(({ key, elements }) => {
          elements.forEach(el => observer.observe(el, observations[key]));
        });

    window.substitutions = {};
    startObservations();
    handleMutations();

    fetchSubstitutions().then(substitutions => {
      window.substitutions = substitutions;
      if (
        // substitutions object parsed successfully
        typeof substitutions === 'object' &&
        // at least one element to be observed exists
        document.querySelectorAll(Object.keys(observations).join(', ')).length
      ) {
        handleMutations();
        window.localize = () => handleMutations();
      }
    });
  }

  var _paq = (window._paq = window._paq || []);
  /* tracker methods like "setCustomDimension" should be called before "trackPageView" */
  _paq.push(['trackPageView']);
  _paq.push(['enableLinkTracking'])
  ;(function () {
    var u = 'https://service.wobblies.org/matomo/';
    _paq.push(['setTrackerUrl', u + 'piwik.php']);
    _paq.push(['setSiteId', '4']);
    var d = document,
      g = d.createElement('script'),
      s = d.getElementsByTagName('script')[0];
    g.type = 'text/javascript';
    g.async = true;
    g.src = u + 'piwik.js';
    s.parentNode.insertBefore(g, s);
  })();

  const substitutionsUrl = "https://cloud.wobblies.org/s/onrmsz8wNSxfHwn/download";

  // uiTweaks({ hideApps: ['forms'] })
  localization({ substitutionsUrl });

}());});