1.index.js

      });
      return (0, _util.shadow)(this, '_parsedAnnotations', parsedAnnotations);
    }
  };
  return Page;
}();
var PDFDocument = function PDFDocumentClosure() {
  var FINGERPRINT_FIRST_BYTES = 1024;
  var EMPTY_FINGERPRINT = '\x00\x00\x00\x00\x00\x00\x00' + '\x00\x00\x00\x00\x00\x00\x00\x00\x00';
  function PDFDocument(pdfManager, arg) {
    var stream;
    if ((0, _primitives.isStream)(arg)) {
      stream = arg;
    } else if ((0, _util.isArrayBuffer)(arg)) {
      stream = new _stream.Stream(arg);
    } else {
      throw new Error('PDFDocument: Unknown argument type');
    }
    if (stream.length <= 0) {
      throw new Error('PDFDocument: stream must have data');
    }
    this.pdfManager = pdfManager;
    this.stream = stream;
    this.xref = new _obj.XRef(stream, pdfManager);
    var evaluatorOptions = pdfManager.evaluatorOptions;
    this.pdfFunctionFactory = new _function.PDFFunctionFactory({
      xref: this.xref,
      isEvalSupported: evaluatorOptions.isEvalSupported
    });
    this._pagePromises = [];
  }
  function find(stream, needle, limit, backwards) {
    var pos = stream.pos;
    var end = stream.end;
    var strBuf = [];
    if (pos + limit > end) {
      limit = end - pos;
    }
    for (var n = 0; n < limit; ++n) {
      strBuf.push(String.fromCharCode(stream.getByte()));
    }
    var str = strBuf.join('');
    stream.pos = pos;
    var index = backwards ? str.lastIndexOf(needle) : str.indexOf(needle);
    if (index === -1) {
      return false;
    }
    stream.pos += index;
    return true;
  }
  var DocumentInfoValidators = {
    Title: _util.isString,
    Author: _util.isString,
    Subject: _util.isString,
    Keywords: _util.isString,
    Creator: _util.isString,
    Producer: _util.isString,
    CreationDate: _util.isString,
    ModDate: _util.isString,
    Trapped: _primitives.isName
  };
  PDFDocument.prototype = {
    parse: function PDFDocument_parse(recoveryMode) {
      this.setup(recoveryMode);
      var version = this.catalog.catDict.get('Version');
      if ((0, _primitives.isName)(version)) {
        this.pdfFormatVersion = version.name;
      }
      try {
        this.acroForm = this.catalog.catDict.get('AcroForm');
        if (this.acroForm) {
          this.xfa = this.acroForm.get('XFA');
          var fields = this.acroForm.get('Fields');
          if ((!fields || !Array.isArray(fields) || fields.length === 0) && !this.xfa) {
            this.acroForm = null;
          }
        }
      } catch (ex) {
        if (ex instanceof _util.MissingDataException) {
          throw ex;
        }
        (0, _util.info)('Something wrong with AcroForm entry');
        this.acroForm = null;
      }
    },
    get linearization() {
      var linearization = null;
      try {
        linearization = _parser.Linearization.create(this.stream);
      } catch (err) {
        if (err instanceof _util.MissingDataException) {
          throw err;
        }
        (0, _util.info)(err);
      }
      return (0, _util.shadow)(this, 'linearization', linearization);
    },
    get startXRef() {
      var stream = this.stream;
      var startXRef = 0;
      var linearization = this.linearization;
      if (linearization) {
        stream.reset();
        if (find(stream, 'endobj', 1024)) {
          startXRef = stream.pos + 6;
        }
      } else {
        var step = 1024;
        var found = false,
            pos = stream.end;
        while (!found && pos > 0) {
          pos -= step - 'startxref'.length;
          if (pos < 0) {
            pos = 0;
          }
          stream.pos = pos;
          found = find(stream, 'startxref', step, true);
        }
        if (found) {
          stream.skip(9);
          var ch;
          do {
            ch = stream.getByte();
          } while ((0, _util.isSpace)(ch));
          var str = '';
          while (ch >= 0x20 && ch <= 0x39) {
            str += String.fromCharCode(ch);
            ch = stream.getByte();
          }
          startXRef = parseInt(str, 10);
          if (isNaN(startXRef)) {
            startXRef = 0;
          }
        }
      }
      return (0, _util.shadow)(this, 'startXRef', startXRef);
    },
    checkHeader: function PDFDocument_checkHeader() {
      var stream = this.stream;
      stream.reset();
      if (find(stream, '%PDF-', 1024)) {
        stream.moveStart();
        var MAX_VERSION_LENGTH = 12;
        var version = '',
            ch;
        while ((ch = stream.getByte()) > 0x20) {
          if (version.length >= MAX_VERSION_LENGTH) {
            break;
          }
          version += String.fromCharCode(ch);
        }
        if (!this.pdfFormatVersion) {
          this.pdfFormatVersion = version.substring(5);
        }
        return;
      }
    },
    parseStartXRef: function PDFDocument_parseStartXRef() {
      var startXRef = this.startXRef;
      this.xref.setStartXRef(startXRef);
    },
    setup: function PDFDocument_setup(recoveryMode) {
      this.xref.parse(recoveryMode);
      this.catalog = new _obj.Catalog(this.pdfManager, this.xref);
    },
    get numPages() {
      var linearization = this.linearization;
      var num = linearization ? linearization.numPages : this.catalog.numPages;
      return (0, _util.shadow)(this, 'numPages', num);
    },
    get documentInfo() {
      var docInfo = {
        PDFFormatVersion: this.pdfFormatVersion,
        IsLinearized: !!this.linearization,
        IsAcroFormPresent: !!this.acroForm,
        IsXFAPresent: !!this.xfa
      };
      var infoDict = void 0;
      try {
        infoDict = this.xref.trailer.get('Info');
      } catch (err) {
        if (err instanceof _util.MissingDataException) {
          throw err;
        }
        (0, _util.info)('The document information dictionary is invalid.');
      }
      if ((0, _primitives.isDict)(infoDict)) {
        for (var key in DocumentInfoValidators) {
          if (infoDict.has(key)) {
            var value = infoDict.get(key);
            if (DocumentInfoValidators[key](value)) {
              docInfo[key] = typeof value !== 'string' ? value : (0, _util.stringToPDFString)(value);
            } else {
              (0, _util.info)('Bad value in document info for "' + key + '"');
            }
          }
        }
      }
      return (0, _util.shadow)(this, 'documentInfo', docInfo);
    },
    get fingerprint() {
      var xref = this.xref,
          hash,
          fileID = '';
      var idArray = xref.trailer.get('ID');
      if (Array.isArray(idArray) && idArray[0] && (0, _util.isString)(idArray[0]) && idArray[0] !== EMPTY_FINGERPRINT) {
        hash = (0, _util.stringToBytes)(idArray[0]);
      } else {
        if (this.stream.ensureRange) {
          this.stream.ensureRange(0, Math.min(FINGERPRINT_FIRST_BYTES, this.stream.end));
        }
        hash = (0, _crypto.calculateMD5)(this.stream.bytes.subarray(0, FINGERPRINT_FIRST_BYTES), 0, FINGERPRINT_FIRST_BYTES);
      }
      for (var i = 0, n = hash.length; i < n; i++) {
        var hex = hash[i].toString(16);
        fileID += hex.length === 1 ? '0' + hex : hex;
      }
      return (0, _util.shadow)(this, 'fingerprint', fileID);
    },
    _getLinearizationPage: function _getLinearizationPage(pageIndex) {
      var catalog = this.catalog,
          linearization = this.linearization;

      (0, _util.assert)(linearization && linearization.pageFirst === pageIndex);
      var ref = new _primitives.Ref(linearization.objectNumberFirst, 0);
      return this.xref.fetchAsync(ref).then(function (obj) {
        if ((0, _primitives.isDict)(obj, 'Page') || (0, _primitives.isDict)(obj) && !obj.has('Type') && obj.has('Contents')) {
          if (ref && !catalog.pageKidsCountCache.has(ref)) {
            catalog.pageKidsCountCache.put(ref, 1);
          }
          return [obj, ref];
        }
        throw new _util.FormatError('The Linearization dictionary doesn\'t point ' + 'to a valid Page dictionary.');
      }).catch(function (reason) {
        (0, _util.info)(reason);
        return catalog.getPageDict(pageIndex);
      });
    },
    getPage: function getPage(pageIndex) {
      var _this5 = this;

      if (this._pagePromises[pageIndex] !== undefined) {
        return this._pagePromises[pageIndex];
      }
      var catalog = this.catalog,
          linearization = this.linearization;

      var promise = linearization && linearization.pageFirst === pageIndex ? this._getLinearizationPage(pageIndex) : catalog.getPageDict(pageIndex);
      return this._pagePromises[pageIndex] = promise.then(function (_ref10) {
        var _ref11 = _slicedToArray(_ref10, 2),
            pageDict = _ref11[0],
            ref = _ref11[1];

        return new Page({
          pdfManager: _this5.pdfManager,
          xref: _this5.xref,
          pageIndex: pageIndex,
          pageDict: pageDict,
          ref: ref,
          fontCache: catalog.fontCache,
          builtInCMapCache: catalog.builtInCMapCache,
          pdfFunctionFactory: _this5.pdfFunctionFactory
        });
      });
    },

    cleanup: function PDFDocument_cleanup() {
      return this.catalog.cleanup();
    }
  };
  return PDFDocument;
}();
exports.Page = Page;
exports.PDFDocument = PDFDocument;

/***/ }),
/* 137 */
/***/ (function(module, exports, __w_pdfjs_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.FileSpec = exports.XRef = exports.ObjectLoader = exports.Catalog = undefined;

var _regenerator = __w_pdfjs_require__(131);

var _regenerator2 = _interopRequireDefault(_regenerator);

var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _util = __w_pdfjs_require__(2);

var _primitives = __w_pdfjs_require__(138);

var _parser = __w_pdfjs_require__(139);

var _chunked_stream = __w_pdfjs_require__(135);

var _crypto = __w_pdfjs_require__(150);

var _colorspace = __w_pdfjs_require__(151);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

function _asyncToGenerator(fn) { return function () { var gen = fn.apply(this, arguments); return new Promise(function (resolve, reject) { function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { return Promise.resolve(value).then(function (value) { step("next", value); }, function (err) { step("throw", err); }); } } return step("next"); }); }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function fetchDestination(dest) {
  return (0, _primitives.isDict)(dest) ? dest.get('D') : dest;
}

var Catalog = function () {
  function Catalog(pdfManager, xref) {
    _classCallCheck(this, Catalog);

    this.pdfManager = pdfManager;
    this.xref = xref;
    this.catDict = xref.getCatalogObj();
    if (!(0, _primitives.isDict)(this.catDict)) {
      throw new _util.FormatError('Catalog object is not a dictionary.');
    }
    this.fontCache = new _primitives.RefSetCache();
    this.builtInCMapCache = new Map();
    this.pageKidsCountCache = new _primitives.RefSetCache();
  }

  _createClass(Catalog, [{
    key: '_readDocumentOutline',
    value: function _readDocumentOutline() {
      var obj = this.catDict.get('Outlines');
      if (!(0, _primitives.isDict)(obj)) {
        return null;
      }
      obj = obj.getRaw('First');
      if (!(0, _primitives.isRef)(obj)) {
        return null;
      }
      var root = { items: [] };
      var queue = [{
        obj: obj,
        parent: root
      }];
      var processed = new _primitives.RefSet();
      processed.put(obj);
      var xref = this.xref,
          blackColor = new Uint8ClampedArray(3);
      while (queue.length > 0) {
        var i = queue.shift();
        var outlineDict = xref.fetchIfRef(i.obj);
        if (outlineDict === null) {
          continue;
        }
        if (!outlineDict.has('Title')) {
          throw new _util.FormatError('Invalid outline item encountered.');
        }
        var data = {
          url: null,
          dest: null
        };
        Catalog.parseDestDictionary({
          destDict: outlineDict,
          resultObj: data,
          docBaseUrl: this.pdfManager.docBaseUrl
        });
        var title = outlineDict.get('Title');
        var flags = outlineDict.get('F') || 0;
        var color = outlineDict.getArray('C');
        var rgbColor = blackColor;
        if (Array.isArray(color) && color.length === 3 && (color[0] !== 0 || color[1] !== 0 || color[2] !== 0)) {
          rgbColor = _colorspace.ColorSpace.singletons.rgb.getRgb(color, 0);
        }
        var outlineItem = {
          dest: data.dest,
          url: data.url,
          unsafeUrl: data.unsafeUrl,
          newWindow: data.newWindow,
          title: (0, _util.stringToPDFString)(title),
          color: rgbColor,
          count: outlineDict.get('Count'),
          bold: !!(flags & 2),
          italic: !!(flags & 1),
          items: []
        };
        i.parent.items.push(outlineItem);
        obj = outlineDict.getRaw('First');
        if ((0, _primitives.isRef)(obj) && !processed.has(obj)) {
          queue.push({
            obj: obj,
            parent: outlineItem
          });
          processed.put(obj);
        }
        obj = outlineDict.getRaw('Next');
        if ((0, _primitives.isRef)(obj) && !processed.has(obj)) {
          queue.push({
            obj: obj,
            parent: i.parent
          });
          processed.put(obj);
        }
      }
      return root.items.length > 0 ? root.items : null;
    }
  }, {
    key: '_readPermissions',
    value: function _readPermissions() {
      var encrypt = this.xref.trailer.get('Encrypt');
      if (!(0, _primitives.isDict)(encrypt)) {
        return null;
      }
      var flags = encrypt.get('P');
      if (!(0, _util.isNum)(flags)) {
        return null;
      }
      flags += Math.pow(2, 32);
      var permissions = [];
      for (var key in _util.PermissionFlag) {
        var value = _util.PermissionFlag[key];
        if (flags & value) {
          permissions.push(value);
        }
      }
      return permissions;
    }
  }, {
    key: 'getDestination',
    value: function getDestination(destinationId) {
      var obj = this._readDests();
      if (obj instanceof NameTree || obj instanceof _primitives.Dict) {
        return fetchDestination(obj.get(destinationId) || null);
      }
      return null;
    }
  }, {
    key: '_readDests',
    value: function _readDests() {
      var obj = this.catDict.get('Names');
      if (obj && obj.has('Dests')) {
        return new NameTree(obj.getRaw('Dests'), this.xref);
      } else if (this.catDict.has('Dests')) {
        return this.catDict.get('Dests');
      }
    }
  }, {
    key: '_readPageLabels',
    value: function _readPageLabels() {
      var obj = this.catDict.getRaw('PageLabels');
      if (!obj) {
        return null;
      }
      var pageLabels = new Array(this.numPages);
      var style = null,
          prefix = '';
      var numberTree = new NumberTree(obj, this.xref);
      var nums = numberTree.getAll();
      var currentLabel = '',
          currentIndex = 1;
      for (var i = 0, ii = this.numPages; i < ii; i++) {
        if (i in nums) {
          var labelDict = nums[i];
          if (!(0, _primitives.isDict)(labelDict)) {
            throw new _util.FormatError('PageLabel is not a dictionary.');
          }
          if (labelDict.has('Type') && !(0, _primitives.isName)(labelDict.get('Type'), 'PageLabel')) {
            throw new _util.FormatError('Invalid type in PageLabel dictionary.');
          }
          if (labelDict.has('S')) {
            var s = labelDict.get('S');
            if (!(0, _primitives.isName)(s)) {
              throw new _util.FormatError('Invalid style in PageLabel dictionary.');
            }
            style = s.name;
          } else {
            style = null;
          }
          if (labelDict.has('P')) {
            var p = labelDict.get('P');
            if (!(0, _util.isString)(p)) {
              throw new _util.FormatError('Invalid prefix in PageLabel dictionary.');
            }
            prefix = (0, _util.stringToPDFString)(p);
          } else {
            prefix = '';
          }
          if (labelDict.has('St')) {
            var st = labelDict.get('St');
            if (!(Number.isInteger(st) && st >= 1)) {
              throw new _util.FormatError('Invalid start in PageLabel dictionary.');
            }
            currentIndex = st;
          } else {
            currentIndex = 1;
          }
        }
        switch (style) {
          case 'D':
            currentLabel = currentIndex;
            break;
          case 'R':
          case 'r':
            currentLabel = (0, _util.toRomanNumerals)(currentIndex, style === 'r');
            break;
          case 'A':
          case 'a':
            var LIMIT = 26;
            var A_UPPER_CASE = 0x41,
                A_LOWER_CASE = 0x61;
            var baseCharCode = style === 'a' ? A_LOWER_CASE : A_UPPER_CASE;
            var letterIndex = currentIndex - 1;
            var character = String.fromCharCode(baseCharCode + letterIndex % LIMIT);
            var charBuf = [];
            for (var j = 0, jj = letterIndex / LIMIT | 0; j <= jj; j++) {
              charBuf.push(character);
            }
            currentLabel = charBuf.join('');
            break;
          default:
            if (style) {
              throw new _util.FormatError('Invalid style "' + style + '" in PageLabel dictionary.');
            }
            currentLabel = '';
        }
        pageLabels[i] = prefix + currentLabel;
        currentIndex++;
      }
      return pageLabels;
    }
  }, {
    key: 'cleanup',
    value: function cleanup() {
      var _this = this;

      this.pageKidsCountCache.clear();
      var promises = [];
      this.fontCache.forEach(function (promise) {
        promises.push(promise);
      });
      return Promise.all(promises).then(function (translatedFonts) {
        for (var i = 0, ii = translatedFonts.length; i < ii; i++) {
          var font = translatedFonts[i].dict;
          delete font.translated;
        }
        _this.fontCache.clear();
        _this.builtInCMapCache.clear();
      });
    }
  }, {
    key: 'getPageDict',
    value: function getPageDict(pageIndex) {
      var capability = (0, _util.createPromiseCapability)();
      var nodesToVisit = [this.catDict.getRaw('Pages')];
      var xref = this.xref,
          pageKidsCountCache = this.pageKidsCountCache;
      var count = void 0,
          currentPageIndex = 0;
      function next() {
        var _loop = function _loop() {
          var currentNode = nodesToVisit.pop();
          if ((0, _primitives.isRef)(currentNode)) {
            count = pageKidsCountCache.get(currentNode);
            if (count > 0 && currentPageIndex + count < pageIndex) {
              currentPageIndex += count;
              return 'continue';
            }
            xref.fetchAsync(currentNode).then(function (obj) {
              if ((0, _primitives.isDict)(obj, 'Page') || (0, _primitives.isDict)(obj) && !obj.has('Kids')) {
                if (pageIndex === currentPageIndex) {
                  if (currentNode && !pageKidsCountCache.has(currentNode)) {
                    pageKidsCountCache.put(currentNode, 1);
                  }
                  capability.resolve([obj, currentNode]);
                } else {
                  currentPageIndex++;
                  next();
                }
                return;
              }
              nodesToVisit.push(obj);
              next();
            }, capability.reject);
            return {
              v: void 0
            };
          }
          if (!(0, _primitives.isDict)(currentNode)) {
            capability.reject(new _util.FormatError('Page dictionary kid reference points to wrong type of object.'));
            return {
              v: void 0
            };
          }
          count = currentNode.get('Count');
          if (Number.isInteger(count) && count >= 0) {
            var objId = currentNode.objId;
            if (objId && !pageKidsCountCache.has(objId)) {
              pageKidsCountCache.put(objId, count);
            }
            if (currentPageIndex + count <= pageIndex) {
              currentPageIndex += count;
              return 'continue';
            }
          }
          var kids = currentNode.get('Kids');
          if (!Array.isArray(kids)) {
            if ((0, _primitives.isName)(currentNode.get('Type'), 'Page') || !currentNode.has('Type') && currentNode.has('Contents')) {
              if (currentPageIndex === pageIndex) {
                capability.resolve([currentNode, null]);
                return {
                  v: void 0
                };
              }
              currentPageIndex++;
              return 'continue';
            }
            capability.reject(new _util.FormatError('Page dictionary kids object is not an array.'));
            return {
              v: void 0
            };
          }
          for (var last = kids.length - 1; last >= 0; last--) {
            nodesToVisit.push(kids[last]);
          }
        };

        while (nodesToVisit.length) {
          var _ret = _loop();

          switch (_ret) {
            case 'continue':
              continue;

            default:
              if ((typeof _ret === 'undefined' ? 'undefined' : _typeof(_ret)) === "object") return _ret.v;
          }
        }
        capability.reject(new Error('Page index ' + pageIndex + ' not found.'));
      }
      next();
      return capability.promise;
    }
  }, {
    key: 'getPageIndex',
    value: function getPageIndex(pageRef) {
      var xref = this.xref;
      function pagesBeforeRef(kidRef) {
        var total = 0,
            parentRef = void 0;
        return xref.fetchAsync(kidRef).then(function (node) {
          if ((0, _primitives.isRefsEqual)(kidRef, pageRef) && !(0, _primitives.isDict)(node, 'Page') && !((0, _primitives.isDict)(node) && !node.has('Type') && node.has('Contents'))) {
            throw new _util.FormatError('The reference does not point to a /Page dictionary.');
          }
          if (!node) {
            return null;
          }
          if (!(0, _primitives.isDict)(node)) {
            throw new _util.FormatError('Node must be a dictionary.');
          }
          parentRef = node.getRaw('Parent');
          return node.getAsync('Parent');
        }).then(function (parent) {
          if (!parent) {
            return null;
          }
          if (!(0, _primitives.isDict)(parent)) {
            throw new _util.FormatError('Parent must be a dictionary.');
          }
          return parent.getAsync('Kids');
        }).then(function (kids) {
          if (!kids) {
            return null;
          }
          var kidPromises = [];
          var found = false;
          for (var i = 0, ii = kids.length; i < ii; i++) {
            var kid = kids[i];
            if (!(0, _primitives.isRef)(kid)) {
              throw new _util.FormatError('Kid must be a reference.');
            }
            if ((0, _primitives.isRefsEqual)(kid, kidRef)) {
              found = true;
              break;
            }
            kidPromises.push(xref.fetchAsync(kid).then(function (kid) {
              if (!(0, _primitives.isDict)(kid)) {
                throw new _util.FormatError('Kid node must be a dictionary.');
              }
              if (kid.has('Count')) {
                total += kid.get('Count');
              } else {
                total++;
              }
            }));
          }
          if (!found) {
            throw new _util.FormatError('Kid reference not found in parent\'s kids.');
          }
          return Promise.all(kidPromises).then(function () {
            return [total, parentRef];
          });
        });
      }
      var total = 0;
      function next(ref) {
        return pagesBeforeRef(ref).then(function (args) {
          if (!args) {
            return total;
          }

          var _args = _slicedToArray(args, 2),
              count = _args[0],
              parentRef = _args[1];

          total += count;
          return next(parentRef);
        });
      }
      return next(pageRef);
    }
  }, {
    key: 'metadata',
    get: function get() {
      var streamRef = this.catDict.getRaw('Metadata');
      if (!(0, _primitives.isRef)(streamRef)) {
        return (0, _util.shadow)(this, 'metadata', null);
      }
      var suppressEncryption = !(this.xref.encrypt && this.xref.encrypt.encryptMetadata);
      var stream = this.xref.fetch(streamRef, suppressEncryption);
      var metadata = void 0;
      if (stream && (0, _primitives.isDict)(stream.dict)) {
        var type = stream.dict.get('Type');
        var subtype = stream.dict.get('Subtype');
        if ((0, _primitives.isName)(type, 'Metadata') && (0, _primitives.isName)(subtype, 'XML')) {
          try {
            metadata = (0, _util.stringToUTF8String)((0, _util.bytesToString)(stream.getBytes()));
          } catch (e) {
            if (e instanceof _util.MissingDataException) {
              throw e;
            }
            (0, _util.info)('Skipping invalid metadata.');
          }
        }
      }
      return (0, _util.shadow)(this, 'metadata', metadata);
    }
  }, {
    key: 'toplevelPagesDict',
    get: function get() {
      var pagesObj = this.catDict.get('Pages');
      if (!(0, _primitives.isDict)(pagesObj)) {
        throw new _util.FormatError('Invalid top-level pages dictionary.');
      }
      return (0, _util.shadow)(this, 'toplevelPagesDict', pagesObj);
    }
  }, {
    key: 'documentOutline',
    get: function get() {
      var obj = null;
      try {
        obj = this._readDocumentOutline();
      } catch (ex) {
        if (ex instanceof _util.MissingDataException) {
          throw ex;
        }
        (0, _util.warn)('Unable to read document outline.');
      }
      return (0, _util.shadow)(this, 'documentOutline', obj);
    }
  }, {
    key: 'permissions',
    get: function get() {
      var permissions = null;
      try {
        permissions = this._readPermissions();
      } catch (ex) {
        if (ex instanceof _util.MissingDataException) {
          throw ex;
        }
        (0, _util.warn)('Unable to read permissions.');
      }
      return (0, _util.shadow)(this, 'permissions', permissions);
    }
  }, {
    key: 'numPages',
    get: function get() {
      var obj = this.toplevelPagesDict.get('Count');
      if (!Number.isInteger(obj)) {
        throw new _util.FormatError('Page count in top-level pages dictionary is not an integer.');
      }
      return (0, _util.shadow)(this, 'numPages', obj);
    }
  }, {
    key: 'destinations',
    get: function get() {
      var obj = this._readDests(),
          dests = Object.create(null);
      if (obj instanceof NameTree) {
        var names = obj.getAll();
        for (var name in names) {
          dests[name] = fetchDestination(names[name]);
        }
      } else if (obj instanceof _primitives.Dict) {
        obj.forEach(function (key, value) {
          if (value) {
            dests[key] = fetchDestination(value);
          }
        });
      }
      return (0, _util.shadow)(this, 'destinations', dests);
    }
  }, {
    key: 'pageLabels',
    get: function get() {
      var obj = null;
      try {
        obj = this._readPageLabels();
      } catch (ex) {
        if (ex instanceof _util.MissingDataException) {
          throw ex;
        }
        (0, _util.warn)('Unable to read page labels.');
      }
      return (0, _util.shadow)(this, 'pageLabels', obj);
    }
  }, {
    key: 'pageMode',
    get: function get() {
      var obj = this.catDict.get('PageMode');
      var pageMode = 'UseNone';
      if ((0, _primitives.isName)(obj)) {
        switch (obj.name) {
          case 'UseNone':
          case 'UseOutlines':
          case 'UseThumbs':
          case 'FullScreen':
          case 'UseOC':
          case 'UseAttachments':
            pageMode = obj.name;
        }
      }
      return (0, _util.shadow)(this, 'pageMode', pageMode);
    }
  }, {
    key: 'attachments',
    get: function get() {
      var obj = this.catDict.get('Names');
      var attachments = null;
      if (obj && obj.has('EmbeddedFiles')) {
        var nameTree = new NameTree(obj.getRaw('EmbeddedFiles'), this.xref);
        var names = nameTree.getAll();
        for (var name in names) {
          var fs = new FileSpec(names[name], this.xref);
          if (!attachments) {
            attachments = Object.create(null);
          }
          attachments[(0, _util.stringToPDFString)(name)] = fs.serializable;
        }
      }
      return (0, _util.shadow)(this, 'attachments', attachments);
    }
  }, {
    key: 'javaScript',
    get: function get() {
      var obj = this.catDict.get('Names');
      var javaScript = null;
      function appendIfJavaScriptDict(jsDict) {
        var type = jsDict.get('S');
        if (!(0, _primitives.isName)(type, 'JavaScript')) {
          return;
        }
        var js = jsDict.get('JS');
        if ((0, _primitives.isStream)(js)) {
          js = (0, _util.bytesToString)(js.getBytes());
        } else if (!(0, _util.isString)(js)) {
          return;
        }
        if (!javaScript) {
          javaScript = [];
        }
        javaScript.push((0, _util.stringToPDFString)(js));
      }
      if (obj && obj.has('JavaScript')) {
        var nameTree = new NameTree(obj.getRaw('JavaScript'), this.xref);
        var names = nameTree.getAll();
        for (var name in names) {
          var jsDict = names[name];
          if ((0, _primitives.isDict)(jsDict)) {
            appendIfJavaScriptDict(jsDict);
          }
        }
      }
      var openActionDict = this.catDict.get('OpenAction');
      if ((0, _primitives.isDict)(openActionDict, 'Action')) {
        var actionType = openActionDict.get('S');
        if ((0, _primitives.isName)(actionType, 'Named')) {
          var action = openActionDict.get('N');
          if ((0, _primitives.isName)(action, 'Print')) {
            if (!javaScript) {
              javaScript = [];
            }
            javaScript.push('print({});');
          }
        } else {
          appendIfJavaScriptDict(openActionDict);
        }
      }
      return (0, _util.shadow)(this, 'javaScript', javaScript);
    }
  }], [{
    key: 'parseDestDictionary',
    value: function parseDestDictionary(params) {
      function addDefaultProtocolToUrl(url) {
        if (url.indexOf('www.') === 0) {
          return 'http://' + url;
        }
        return url;
      }
      function tryConvertUrlEncoding(url) {
        try {
          return (0, _util.stringToUTF8String)(url);
        } catch (e) {
          return url;
        }
      }
      var destDict = params.destDict;
      if (!(0, _primitives.isDict)(destDict)) {
        (0, _util.warn)('parseDestDictionary: `destDict` must be a dictionary.');
        return;
      }
      var resultObj = params.resultObj;
      if ((typeof resultObj === 'undefined' ? 'undefined' : _typeof(resultObj)) !== 'object') {
        (0, _util.warn)('parseDestDictionary: `resultObj` must be an object.');
        return;
      }
      var docBaseUrl = params.docBaseUrl || null;
      var action = destDict.get('A'),
          url = void 0,
          dest = void 0;
      if (!(0, _primitives.isDict)(action) && destDict.has('Dest')) {
        action = destDict.get('Dest');
      }
      if ((0, _primitives.isDict)(action)) {
        var actionType = action.get('S');
        if (!(0, _primitives.isName)(actionType)) {
          (0, _util.warn)('parseDestDictionary: Invalid type in Action dictionary.');
          return;
        }
        var actionName = actionType.name;
        switch (actionName) {
          case 'URI':
            url = action.get('URI');
            if ((0, _primitives.isName)(url)) {
              url = '/' + url.name;
            } else if ((0, _util.isString)(url)) {
              url = addDefaultProtocolToUrl(url);
            }
            break;
          case 'GoTo':
            dest = action.get('D');
            break;
          case 'Launch':
          case 'GoToR':
            var urlDict = action.get('F');
            if ((0, _primitives.isDict)(urlDict)) {
              url = urlDict.get('F') || null;
            } else if ((0, _util.isString)(urlDict)) {
              url = urlDict;
            }
            var remoteDest = action.get('D');
            if (remoteDest) {
              if ((0, _primitives.isName)(remoteDest)) {
                remoteDest = remoteDest.name;
              }
              if ((0, _util.isString)(url)) {
                var baseUrl = url.split('#')[0];
                if ((0, _util.isString)(remoteDest)) {
                  url = baseUrl + '#' + remoteDest;
                } else if (Array.isArray(remoteDest)) {
                  url = baseUrl + '#' + JSON.stringify(remoteDest);
                }
              }
            }
            var newWindow = action.get('NewWindow');
            if ((0, _util.isBool)(newWindow)) {
              resultObj.newWindow = newWindow;
            }
            break;
          case 'Named':
            var namedAction = action.get('N');
            if ((0, _primitives.isName)(namedAction)) {