1.index.js

          return next;
        }
      }
      next.done = true;
      return next;
    };
  };
  function values(iterable) {
    if (iterable) {
      var iteratorMethod = iterable[iteratorSymbol];
      if (iteratorMethod) {
        return iteratorMethod.call(iterable);
      }
      if (typeof iterable.next === "function") {
        return iterable;
      }
      if (!isNaN(iterable.length)) {
        var i = -1,
            next = function next() {
          while (++i < iterable.length) {
            if (hasOwn.call(iterable, i)) {
              next.value = iterable[i];
              next.done = false;
              return next;
            }
          }
          next.value = undefined;
          next.done = true;
          return next;
        };
        return next.next = next;
      }
    }
    return { next: doneResult };
  }
  runtime.values = values;
  function doneResult() {
    return {
      value: undefined,
      done: true
    };
  }
  Context.prototype = {
    constructor: Context,
    reset: function reset(skipTempReset) {
      this.prev = 0;
      this.next = 0;
      this.sent = this._sent = undefined;
      this.done = false;
      this.delegate = null;
      this.method = "next";
      this.arg = undefined;
      this.tryEntries.forEach(resetTryEntry);
      if (!skipTempReset) {
        for (var name in this) {
          if (name.charAt(0) === "t" && hasOwn.call(this, name) && !isNaN(+name.slice(1))) {
            this[name] = undefined;
          }
        }
      }
    },
    stop: function stop() {
      this.done = true;
      var rootEntry = this.tryEntries[0];
      var rootRecord = rootEntry.completion;
      if (rootRecord.type === "throw") {
        throw rootRecord.arg;
      }
      return this.rval;
    },
    dispatchException: function dispatchException(exception) {
      if (this.done) {
        throw exception;
      }
      var context = this;
      function handle(loc, caught) {
        record.type = "throw";
        record.arg = exception;
        context.next = loc;
        if (caught) {
          context.method = "next";
          context.arg = undefined;
        }
        return !!caught;
      }
      for (var i = this.tryEntries.length - 1; i >= 0; --i) {
        var entry = this.tryEntries[i];
        var record = entry.completion;
        if (entry.tryLoc === "root") {
          return handle("end");
        }
        if (entry.tryLoc <= this.prev) {
          var hasCatch = hasOwn.call(entry, "catchLoc");
          var hasFinally = hasOwn.call(entry, "finallyLoc");
          if (hasCatch && hasFinally) {
            if (this.prev < entry.catchLoc) {
              return handle(entry.catchLoc, true);
            } else if (this.prev < entry.finallyLoc) {
              return handle(entry.finallyLoc);
            }
          } else if (hasCatch) {
            if (this.prev < entry.catchLoc) {
              return handle(entry.catchLoc, true);
            }
          } else if (hasFinally) {
            if (this.prev < entry.finallyLoc) {
              return handle(entry.finallyLoc);
            }
          } else {
            throw new Error("try statement without catch or finally");
          }
        }
      }
    },
    abrupt: function abrupt(type, arg) {
      for (var i = this.tryEntries.length - 1; i >= 0; --i) {
        var entry = this.tryEntries[i];
        if (entry.tryLoc <= this.prev && hasOwn.call(entry, "finallyLoc") && this.prev < entry.finallyLoc) {
          var finallyEntry = entry;
          break;
        }
      }
      if (finallyEntry && (type === "break" || type === "continue") && finallyEntry.tryLoc <= arg && arg <= finallyEntry.finallyLoc) {
        finallyEntry = null;
      }
      var record = finallyEntry ? finallyEntry.completion : {};
      record.type = type;
      record.arg = arg;
      if (finallyEntry) {
        this.method = "next";
        this.next = finallyEntry.finallyLoc;
        return ContinueSentinel;
      }
      return this.complete(record);
    },
    complete: function complete(record, afterLoc) {
      if (record.type === "throw") {
        throw record.arg;
      }
      if (record.type === "break" || record.type === "continue") {
        this.next = record.arg;
      } else if (record.type === "return") {
        this.rval = this.arg = record.arg;
        this.method = "return";
        this.next = "end";
      } else if (record.type === "normal" && afterLoc) {
        this.next = afterLoc;
      }
      return ContinueSentinel;
    },
    finish: function finish(finallyLoc) {
      for (var i = this.tryEntries.length - 1; i >= 0; --i) {
        var entry = this.tryEntries[i];
        if (entry.finallyLoc === finallyLoc) {
          this.complete(entry.completion, entry.afterLoc);
          resetTryEntry(entry);
          return ContinueSentinel;
        }
      }
    },
    "catch": function _catch(tryLoc) {
      for (var i = this.tryEntries.length - 1; i >= 0; --i) {
        var entry = this.tryEntries[i];
        if (entry.tryLoc === tryLoc) {
          var record = entry.completion;
          if (record.type === "throw") {
            var thrown = record.arg;
            resetTryEntry(entry);
          }
          return thrown;
        }
      }
      throw new Error("illegal catch attempt");
    },
    delegateYield: function delegateYield(iterable, resultName, nextLoc) {
      this.delegate = {
        iterator: values(iterable),
        resultName: resultName,
        nextLoc: nextLoc
      };
      if (this.method === "next") {
        this.arg = undefined;
      }
      return ContinueSentinel;
    }
  };
}(function () {
  return this;
}() || Function("return this")());
/* WEBPACK VAR INJECTION */}.call(this, __w_pdfjs_require__(134)(module)))

/***/ }),
/* 134 */
/***/ (function(module, exports, __w_pdfjs_require__) {

"use strict";


module.exports = function (module) {
  if (!module.webpackPolyfill) {
    module.deprecate = function () {};
    module.paths = [];
    if (!module.children) module.children = [];
    Object.defineProperty(module, "loaded", {
      enumerable: true,
      get: function get() {
        return module.l;
      }
    });
    Object.defineProperty(module, "id", {
      enumerable: true,
      get: function get() {
        return module.i;
      }
    });
    module.webpackPolyfill = 1;
  }
  return module;
};

/***/ }),
/* 135 */
/***/ (function(module, exports, __w_pdfjs_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.ChunkedStreamManager = exports.ChunkedStream = undefined;

var _util = __w_pdfjs_require__(2);

var ChunkedStream = function ChunkedStreamClosure() {
  function ChunkedStream(length, chunkSize, manager) {
    this.bytes = new Uint8Array(length);
    this.start = 0;
    this.pos = 0;
    this.end = length;
    this.chunkSize = chunkSize;
    this.loadedChunks = [];
    this.numChunksLoaded = 0;
    this.numChunks = Math.ceil(length / chunkSize);
    this.manager = manager;
    this.progressiveDataLength = 0;
    this.lastSuccessfulEnsureByteChunk = -1;
  }
  ChunkedStream.prototype = {
    getMissingChunks: function ChunkedStream_getMissingChunks() {
      var chunks = [];
      for (var chunk = 0, n = this.numChunks; chunk < n; ++chunk) {
        if (!this.loadedChunks[chunk]) {
          chunks.push(chunk);
        }
      }
      return chunks;
    },
    getBaseStreams: function ChunkedStream_getBaseStreams() {
      return [this];
    },
    allChunksLoaded: function ChunkedStream_allChunksLoaded() {
      return this.numChunksLoaded === this.numChunks;
    },
    onReceiveData: function ChunkedStream_onReceiveData(begin, chunk) {
      var end = begin + chunk.byteLength;
      if (begin % this.chunkSize !== 0) {
        throw new Error('Bad begin offset: ' + begin);
      }
      var length = this.bytes.length;
      if (end % this.chunkSize !== 0 && end !== length) {
        throw new Error('Bad end offset: ' + end);
      }
      this.bytes.set(new Uint8Array(chunk), begin);
      var chunkSize = this.chunkSize;
      var beginChunk = Math.floor(begin / chunkSize);
      var endChunk = Math.floor((end - 1) / chunkSize) + 1;
      var curChunk;
      for (curChunk = beginChunk; curChunk < endChunk; ++curChunk) {
        if (!this.loadedChunks[curChunk]) {
          this.loadedChunks[curChunk] = true;
          ++this.numChunksLoaded;
        }
      }
    },
    onReceiveProgressiveData: function ChunkedStream_onReceiveProgressiveData(data) {
      var position = this.progressiveDataLength;
      var beginChunk = Math.floor(position / this.chunkSize);
      this.bytes.set(new Uint8Array(data), position);
      position += data.byteLength;
      this.progressiveDataLength = position;
      var endChunk = position >= this.end ? this.numChunks : Math.floor(position / this.chunkSize);
      var curChunk;
      for (curChunk = beginChunk; curChunk < endChunk; ++curChunk) {
        if (!this.loadedChunks[curChunk]) {
          this.loadedChunks[curChunk] = true;
          ++this.numChunksLoaded;
        }
      }
    },
    ensureByte: function ChunkedStream_ensureByte(pos) {
      var chunk = Math.floor(pos / this.chunkSize);
      if (chunk === this.lastSuccessfulEnsureByteChunk) {
        return;
      }
      if (!this.loadedChunks[chunk]) {
        throw new _util.MissingDataException(pos, pos + 1);
      }
      this.lastSuccessfulEnsureByteChunk = chunk;
    },
    ensureRange: function ChunkedStream_ensureRange(begin, end) {
      if (begin >= end) {
        return;
      }
      if (end <= this.progressiveDataLength) {
        return;
      }
      var chunkSize = this.chunkSize;
      var beginChunk = Math.floor(begin / chunkSize);
      var endChunk = Math.floor((end - 1) / chunkSize) + 1;
      for (var chunk = beginChunk; chunk < endChunk; ++chunk) {
        if (!this.loadedChunks[chunk]) {
          throw new _util.MissingDataException(begin, end);
        }
      }
    },
    nextEmptyChunk: function ChunkedStream_nextEmptyChunk(beginChunk) {
      var chunk,
          numChunks = this.numChunks;
      for (var i = 0; i < numChunks; ++i) {
        chunk = (beginChunk + i) % numChunks;
        if (!this.loadedChunks[chunk]) {
          return chunk;
        }
      }
      return null;
    },
    hasChunk: function ChunkedStream_hasChunk(chunk) {
      return !!this.loadedChunks[chunk];
    },
    get length() {
      return this.end - this.start;
    },
    get isEmpty() {
      return this.length === 0;
    },
    getByte: function ChunkedStream_getByte() {
      var pos = this.pos;
      if (pos >= this.end) {
        return -1;
      }
      this.ensureByte(pos);
      return this.bytes[this.pos++];
    },
    getUint16: function ChunkedStream_getUint16() {
      var b0 = this.getByte();
      var b1 = this.getByte();
      if (b0 === -1 || b1 === -1) {
        return -1;
      }
      return (b0 << 8) + b1;
    },
    getInt32: function ChunkedStream_getInt32() {
      var b0 = this.getByte();
      var b1 = this.getByte();
      var b2 = this.getByte();
      var b3 = this.getByte();
      return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3;
    },
    getBytes: function getBytes(length) {
      var forceClamped = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

      var bytes = this.bytes;
      var pos = this.pos;
      var strEnd = this.end;
      if (!length) {
        this.ensureRange(pos, strEnd);
        var _subarray = bytes.subarray(pos, strEnd);
        return forceClamped ? new Uint8ClampedArray(_subarray) : _subarray;
      }
      var end = pos + length;
      if (end > strEnd) {
        end = strEnd;
      }
      this.ensureRange(pos, end);
      this.pos = end;
      var subarray = bytes.subarray(pos, end);
      return forceClamped ? new Uint8ClampedArray(subarray) : subarray;
    },

    peekByte: function ChunkedStream_peekByte() {
      var peekedByte = this.getByte();
      this.pos--;
      return peekedByte;
    },
    peekBytes: function peekBytes(length) {
      var forceClamped = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

      var bytes = this.getBytes(length, forceClamped);
      this.pos -= bytes.length;
      return bytes;
    },

    getByteRange: function ChunkedStream_getBytes(begin, end) {
      this.ensureRange(begin, end);
      return this.bytes.subarray(begin, end);
    },
    skip: function ChunkedStream_skip(n) {
      if (!n) {
        n = 1;
      }
      this.pos += n;
    },
    reset: function ChunkedStream_reset() {
      this.pos = this.start;
    },
    moveStart: function ChunkedStream_moveStart() {
      this.start = this.pos;
    },
    makeSubStream: function ChunkedStream_makeSubStream(start, length, dict) {
      this.ensureRange(start, start + length);
      function ChunkedStreamSubstream() {}
      ChunkedStreamSubstream.prototype = Object.create(this);
      ChunkedStreamSubstream.prototype.getMissingChunks = function () {
        var chunkSize = this.chunkSize;
        var beginChunk = Math.floor(this.start / chunkSize);
        var endChunk = Math.floor((this.end - 1) / chunkSize) + 1;
        var missingChunks = [];
        for (var chunk = beginChunk; chunk < endChunk; ++chunk) {
          if (!this.loadedChunks[chunk]) {
            missingChunks.push(chunk);
          }
        }
        return missingChunks;
      };
      var subStream = new ChunkedStreamSubstream();
      subStream.pos = subStream.start = start;
      subStream.end = start + length || this.end;
      subStream.dict = dict;
      return subStream;
    }
  };
  return ChunkedStream;
}();
var ChunkedStreamManager = function ChunkedStreamManagerClosure() {
  function ChunkedStreamManager(pdfNetworkStream, args) {
    var chunkSize = args.rangeChunkSize;
    var length = args.length;
    this.stream = new ChunkedStream(length, chunkSize, this);
    this.length = length;
    this.chunkSize = chunkSize;
    this.pdfNetworkStream = pdfNetworkStream;
    this.url = args.url;
    this.disableAutoFetch = args.disableAutoFetch;
    this.msgHandler = args.msgHandler;
    this.currRequestId = 0;
    this.chunksNeededByRequest = Object.create(null);
    this.requestsByChunk = Object.create(null);
    this.promisesByRequest = Object.create(null);
    this.progressiveDataLength = 0;
    this.aborted = false;
    this._loadedStreamCapability = (0, _util.createPromiseCapability)();
  }
  ChunkedStreamManager.prototype = {
    onLoadedStream: function ChunkedStreamManager_getLoadedStream() {
      return this._loadedStreamCapability.promise;
    },
    sendRequest: function ChunkedStreamManager_sendRequest(begin, end) {
      var _this = this;

      var rangeReader = this.pdfNetworkStream.getRangeReader(begin, end);
      if (!rangeReader.isStreamingSupported) {
        rangeReader.onProgress = this.onProgress.bind(this);
      }
      var chunks = [],
          loaded = 0;
      var manager = this;
      var promise = new Promise(function (resolve, reject) {
        var readChunk = function readChunk(chunk) {
          try {
            if (!chunk.done) {
              var data = chunk.value;
              chunks.push(data);
              loaded += (0, _util.arrayByteLength)(data);
              if (rangeReader.isStreamingSupported) {
                manager.onProgress({ loaded: loaded });
              }
              rangeReader.read().then(readChunk, reject);
              return;
            }
            var chunkData = (0, _util.arraysToBytes)(chunks);
            chunks = null;
            resolve(chunkData);
          } catch (e) {
            reject(e);
          }
        };
        rangeReader.read().then(readChunk, reject);
      });
      promise.then(function (data) {
        if (_this.aborted) {
          return;
        }
        _this.onReceiveData({
          chunk: data,
          begin: begin
        });
      });
    },
    requestAllChunks: function ChunkedStreamManager_requestAllChunks() {
      var missingChunks = this.stream.getMissingChunks();
      this._requestChunks(missingChunks);
      return this._loadedStreamCapability.promise;
    },
    _requestChunks: function ChunkedStreamManager_requestChunks(chunks) {
      var requestId = this.currRequestId++;
      var i, ii;
      var chunksNeeded = Object.create(null);
      this.chunksNeededByRequest[requestId] = chunksNeeded;
      for (i = 0, ii = chunks.length; i < ii; i++) {
        if (!this.stream.hasChunk(chunks[i])) {
          chunksNeeded[chunks[i]] = true;
        }
      }
      if ((0, _util.isEmptyObj)(chunksNeeded)) {
        return Promise.resolve();
      }
      var capability = (0, _util.createPromiseCapability)();
      this.promisesByRequest[requestId] = capability;
      var chunksToRequest = [];
      for (var chunk in chunksNeeded) {
        chunk = chunk | 0;
        if (!(chunk in this.requestsByChunk)) {
          this.requestsByChunk[chunk] = [];
          chunksToRequest.push(chunk);
        }
        this.requestsByChunk[chunk].push(requestId);
      }
      if (!chunksToRequest.length) {
        return capability.promise;
      }
      var groupedChunksToRequest = this.groupChunks(chunksToRequest);
      for (i = 0; i < groupedChunksToRequest.length; ++i) {
        var groupedChunk = groupedChunksToRequest[i];
        var begin = groupedChunk.beginChunk * this.chunkSize;
        var end = Math.min(groupedChunk.endChunk * this.chunkSize, this.length);
        this.sendRequest(begin, end);
      }
      return capability.promise;
    },
    getStream: function ChunkedStreamManager_getStream() {
      return this.stream;
    },
    requestRange: function ChunkedStreamManager_requestRange(begin, end) {
      end = Math.min(end, this.length);
      var beginChunk = this.getBeginChunk(begin);
      var endChunk = this.getEndChunk(end);
      var chunks = [];
      for (var chunk = beginChunk; chunk < endChunk; ++chunk) {
        chunks.push(chunk);
      }
      return this._requestChunks(chunks);
    },
    requestRanges: function ChunkedStreamManager_requestRanges(ranges) {
      ranges = ranges || [];
      var chunksToRequest = [];
      for (var i = 0; i < ranges.length; i++) {
        var beginChunk = this.getBeginChunk(ranges[i].begin);
        var endChunk = this.getEndChunk(ranges[i].end);
        for (var chunk = beginChunk; chunk < endChunk; ++chunk) {
          if (!chunksToRequest.includes(chunk)) {
            chunksToRequest.push(chunk);
          }
        }
      }
      chunksToRequest.sort(function (a, b) {
        return a - b;
      });
      return this._requestChunks(chunksToRequest);
    },
    groupChunks: function ChunkedStreamManager_groupChunks(chunks) {
      var groupedChunks = [];
      var beginChunk = -1;
      var prevChunk = -1;
      for (var i = 0; i < chunks.length; ++i) {
        var chunk = chunks[i];
        if (beginChunk < 0) {
          beginChunk = chunk;
        }
        if (prevChunk >= 0 && prevChunk + 1 !== chunk) {
          groupedChunks.push({
            beginChunk: beginChunk,
            endChunk: prevChunk + 1
          });
          beginChunk = chunk;
        }
        if (i + 1 === chunks.length) {
          groupedChunks.push({
            beginChunk: beginChunk,
            endChunk: chunk + 1
          });
        }
        prevChunk = chunk;
      }
      return groupedChunks;
    },
    onProgress: function ChunkedStreamManager_onProgress(args) {
      var bytesLoaded = this.stream.numChunksLoaded * this.chunkSize + args.loaded;
      this.msgHandler.send('DocProgress', {
        loaded: bytesLoaded,
        total: this.length
      });
    },
    onReceiveData: function ChunkedStreamManager_onReceiveData(args) {
      var chunk = args.chunk;
      var isProgressive = args.begin === undefined;
      var begin = isProgressive ? this.progressiveDataLength : args.begin;
      var end = begin + chunk.byteLength;
      var beginChunk = Math.floor(begin / this.chunkSize);
      var endChunk = end < this.length ? Math.floor(end / this.chunkSize) : Math.ceil(end / this.chunkSize);
      if (isProgressive) {
        this.stream.onReceiveProgressiveData(chunk);
        this.progressiveDataLength = end;
      } else {
        this.stream.onReceiveData(begin, chunk);
      }
      if (this.stream.allChunksLoaded()) {
        this._loadedStreamCapability.resolve(this.stream);
      }
      var loadedRequests = [];
      var i, requestId;
      for (chunk = beginChunk; chunk < endChunk; ++chunk) {
        var requestIds = this.requestsByChunk[chunk] || [];
        delete this.requestsByChunk[chunk];
        for (i = 0; i < requestIds.length; ++i) {
          requestId = requestIds[i];
          var chunksNeeded = this.chunksNeededByRequest[requestId];
          if (chunk in chunksNeeded) {
            delete chunksNeeded[chunk];
          }
          if (!(0, _util.isEmptyObj)(chunksNeeded)) {
            continue;
          }
          loadedRequests.push(requestId);
        }
      }
      if (!this.disableAutoFetch && (0, _util.isEmptyObj)(this.requestsByChunk)) {
        var nextEmptyChunk;
        if (this.stream.numChunksLoaded === 1) {
          var lastChunk = this.stream.numChunks - 1;
          if (!this.stream.hasChunk(lastChunk)) {
            nextEmptyChunk = lastChunk;
          }
        } else {
          nextEmptyChunk = this.stream.nextEmptyChunk(endChunk);
        }
        if (Number.isInteger(nextEmptyChunk)) {
          this._requestChunks([nextEmptyChunk]);
        }
      }
      for (i = 0; i < loadedRequests.length; ++i) {
        requestId = loadedRequests[i];
        var capability = this.promisesByRequest[requestId];
        delete this.promisesByRequest[requestId];
        capability.resolve();
      }
      this.msgHandler.send('DocProgress', {
        loaded: this.stream.numChunksLoaded * this.chunkSize,
        total: this.length
      });
    },
    onError: function ChunkedStreamManager_onError(err) {
      this._loadedStreamCapability.reject(err);
    },
    getBeginChunk: function ChunkedStreamManager_getBeginChunk(begin) {
      var chunk = Math.floor(begin / this.chunkSize);
      return chunk;
    },
    getEndChunk: function ChunkedStreamManager_getEndChunk(end) {
      var chunk = Math.floor((end - 1) / this.chunkSize) + 1;
      return chunk;
    },
    abort: function ChunkedStreamManager_abort() {
      this.aborted = true;
      if (this.pdfNetworkStream) {
        this.pdfNetworkStream.cancelAllRequests('abort');
      }
      for (var requestId in this.promisesByRequest) {
        var capability = this.promisesByRequest[requestId];
        capability.reject(new Error('Request was aborted'));
      }
    }
  };
  return ChunkedStreamManager;
}();
exports.ChunkedStream = ChunkedStream;
exports.ChunkedStreamManager = ChunkedStreamManager;

/***/ }),
/* 136 */
/***/ (function(module, exports, __w_pdfjs_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.PDFDocument = exports.Page = undefined;

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 _util = __w_pdfjs_require__(2);

var _obj = __w_pdfjs_require__(137);

var _primitives = __w_pdfjs_require__(138);

var _stream = __w_pdfjs_require__(140);

var _annotation = __w_pdfjs_require__(152);

var _crypto = __w_pdfjs_require__(150);

var _parser = __w_pdfjs_require__(139);

var _operator_list = __w_pdfjs_require__(153);

var _evaluator = __w_pdfjs_require__(154);

var _function = __w_pdfjs_require__(168);

var Page = function PageClosure() {
  var DEFAULT_USER_UNIT = 1.0;
  var LETTER_SIZE_MEDIABOX = [0, 0, 612, 792];
  function isAnnotationRenderable(annotation, intent) {
    return intent === 'display' && annotation.viewable || intent === 'print' && annotation.printable;
  }
  function Page(_ref) {
    var pdfManager = _ref.pdfManager,
        xref = _ref.xref,
        pageIndex = _ref.pageIndex,
        pageDict = _ref.pageDict,
        ref = _ref.ref,
        fontCache = _ref.fontCache,
        builtInCMapCache = _ref.builtInCMapCache,
        pdfFunctionFactory = _ref.pdfFunctionFactory;

    this.pdfManager = pdfManager;
    this.pageIndex = pageIndex;
    this.pageDict = pageDict;
    this.xref = xref;
    this.ref = ref;
    this.fontCache = fontCache;
    this.builtInCMapCache = builtInCMapCache;
    this.pdfFunctionFactory = pdfFunctionFactory;
    this.evaluatorOptions = pdfManager.evaluatorOptions;
    this.resourcesPromise = null;
    var uniquePrefix = 'p' + this.pageIndex + '_';
    var idCounters = { obj: 0 };
    this.idFactory = {
      createObjId: function createObjId() {
        return uniquePrefix + ++idCounters.obj;
      }
    };
  }
  Page.prototype = {
    _getInheritableProperty: function _getInheritableProperty(key) {
      var getArray = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;

      var value = (0, _util.getInheritableProperty)({
        dict: this.pageDict,
        key: key,
        getArray: getArray,
        stopWhenFound: false
      });
      if (!Array.isArray(value)) {
        return value;
      }
      if (value.length === 1 || !(0, _primitives.isDict)(value[0])) {
        return value[0];
      }
      return _primitives.Dict.merge(this.xref, value);
    },

    get content() {
      return this.pageDict.get('Contents');
    },
    get resources() {
      return (0, _util.shadow)(this, 'resources', this._getInheritableProperty('Resources') || _primitives.Dict.empty);
    },
    get mediaBox() {
      var mediaBox = this._getInheritableProperty('MediaBox', true);
      if (!Array.isArray(mediaBox) || mediaBox.length !== 4) {
        return (0, _util.shadow)(this, 'mediaBox', LETTER_SIZE_MEDIABOX);
      }
      return (0, _util.shadow)(this, 'mediaBox', mediaBox);
    },
    get cropBox() {
      var cropBox = this._getInheritableProperty('CropBox', true);
      if (!Array.isArray(cropBox) || cropBox.length !== 4) {
        return (0, _util.shadow)(this, 'cropBox', this.mediaBox);
      }
      return (0, _util.shadow)(this, 'cropBox', cropBox);
    },
    get userUnit() {
      var obj = this.pageDict.get('UserUnit');
      if (!(0, _util.isNum)(obj) || obj <= 0) {
        obj = DEFAULT_USER_UNIT;
      }
      return (0, _util.shadow)(this, 'userUnit', obj);
    },
    get view() {
      var mediaBox = this.mediaBox,
          cropBox = this.cropBox;
      if (mediaBox === cropBox) {
        return (0, _util.shadow)(this, 'view', mediaBox);
      }
      var intersection = _util.Util.intersect(cropBox, mediaBox);
      return (0, _util.shadow)(this, 'view', intersection || mediaBox);
    },
    get rotate() {
      var rotate = this._getInheritableProperty('Rotate') || 0;
      if (rotate % 90 !== 0) {
        rotate = 0;
      } else if (rotate >= 360) {
        rotate = rotate % 360;
      } else if (rotate < 0) {
        rotate = (rotate % 360 + 360) % 360;
      }
      return (0, _util.shadow)(this, 'rotate', rotate);
    },
    getContentStream: function Page_getContentStream() {
      var content = this.content;
      var stream;
      if (Array.isArray(content)) {
        var xref = this.xref;
        var i,
            n = content.length;
        var streams = [];
        for (i = 0; i < n; ++i) {
          streams.push(xref.fetchIfRef(content[i]));
        }
        stream = new _stream.StreamsSequenceStream(streams);
      } else if ((0, _primitives.isStream)(content)) {
        stream = content;
      } else {
        stream = new _stream.NullStream();
      }
      return stream;
    },
    loadResources: function Page_loadResources(keys) {
      var _this = this;

      if (!this.resourcesPromise) {
        this.resourcesPromise = this.pdfManager.ensure(this, 'resources');
      }
      return this.resourcesPromise.then(function () {
        var objectLoader = new _obj.ObjectLoader(_this.resources, keys, _this.xref);
        return objectLoader.load();
      });
    },
    getOperatorList: function getOperatorList(_ref2) {
      var _this2 = this;

      var handler = _ref2.handler,
          task = _ref2.task,
          intent = _ref2.intent,
          renderInteractiveForms = _ref2.renderInteractiveForms;

      var contentStreamPromise = this.pdfManager.ensure(this, 'getContentStream');
      var resourcesPromise = this.loadResources(['ExtGState', 'ColorSpace', 'Pattern', 'Shading', 'XObject', 'Font']);
      var partialEvaluator = new _evaluator.PartialEvaluator({
        pdfManager: this.pdfManager,
        xref: this.xref,
        handler: handler,
        pageIndex: this.pageIndex,
        idFactory: this.idFactory,
        fontCache: this.fontCache,
        builtInCMapCache: this.builtInCMapCache,
        options: this.evaluatorOptions,
        pdfFunctionFactory: this.pdfFunctionFactory
      });
      var dataPromises = Promise.all([contentStreamPromise, resourcesPromise]);
      var pageListPromise = dataPromises.then(function (_ref3) {
        var _ref4 = _slicedToArray(_ref3, 1),
            contentStream = _ref4[0];

        var opList = new _operator_list.OperatorList(intent, handler, _this2.pageIndex);
        handler.send('StartRenderPage', {
          transparency: partialEvaluator.hasBlendModes(_this2.resources),
          pageIndex: _this2.pageIndex,
          intent: intent
        });
        return partialEvaluator.getOperatorList({
          stream: contentStream,
          task: task,
          resources: _this2.resources,
          operatorList: opList
        }).then(function () {
          return opList;
        });
      });
      return Promise.all([pageListPromise, this._parsedAnnotations]).then(function (_ref5) {
        var _ref6 = _slicedToArray(_ref5, 2),
            pageOpList = _ref6[0],
            annotations = _ref6[1];

        if (annotations.length === 0) {
          pageOpList.flush(true);
          return pageOpList;
        }
        var i,
            ii,
            opListPromises = [];
        for (i = 0, ii = annotations.length; i < ii; i++) {
          if (isAnnotationRenderable(annotations[i], intent)) {
            opListPromises.push(annotations[i].getOperatorList(partialEvaluator, task, renderInteractiveForms));
          }
        }
        return Promise.all(opListPromises).then(function (opLists) {
          pageOpList.addOp(_util.OPS.beginAnnotations, []);
          for (i = 0, ii = opLists.length; i < ii; i++) {
            pageOpList.addOpList(opLists[i]);
          }
          pageOpList.addOp(_util.OPS.endAnnotations, []);
          pageOpList.flush(true);
          return pageOpList;
        });
      });
    },
    extractTextContent: function extractTextContent(_ref7) {
      var _this3 = this;

      var handler = _ref7.handler,
          task = _ref7.task,
          normalizeWhitespace = _ref7.normalizeWhitespace,
          sink = _ref7.sink,
          combineTextItems = _ref7.combineTextItems;

      var contentStreamPromise = this.pdfManager.ensure(this, 'getContentStream');
      var resourcesPromise = this.loadResources(['ExtGState', 'XObject', 'Font']);
      var dataPromises = Promise.all([contentStreamPromise, resourcesPromise]);
      return dataPromises.then(function (_ref8) {
        var _ref9 = _slicedToArray(_ref8, 1),
            contentStream = _ref9[0];

        var partialEvaluator = new _evaluator.PartialEvaluator({
          pdfManager: _this3.pdfManager,
          xref: _this3.xref,
          handler: handler,
          pageIndex: _this3.pageIndex,
          idFactory: _this3.idFactory,
          fontCache: _this3.fontCache,
          builtInCMapCache: _this3.builtInCMapCache,
          options: _this3.evaluatorOptions,
          pdfFunctionFactory: _this3.pdfFunctionFactory
        });
        return partialEvaluator.getTextContent({
          stream: contentStream,
          task: task,
          resources: _this3.resources,
          normalizeWhitespace: normalizeWhitespace,
          combineTextItems: combineTextItems,
          sink: sink
        });
      });
    },
    getAnnotationsData: function getAnnotationsData(intent) {
      return this._parsedAnnotations.then(function (annotations) {
        var annotationsData = [];
        for (var i = 0, ii = annotations.length; i < ii; i++) {
          if (!intent || isAnnotationRenderable(annotations[i], intent)) {
            annotationsData.push(annotations[i].data);
          }
        }
        return annotationsData;
      });
    },

    get annotations() {
      return (0, _util.shadow)(this, 'annotations', this._getInheritableProperty('Annots') || []);
    },
    get _parsedAnnotations() {
      var _this4 = this;

      var parsedAnnotations = this.pdfManager.ensure(this, 'annotations').then(function () {
        var annotationRefs = _this4.annotations;
        var annotationPromises = [];
        for (var i = 0, ii = annotationRefs.length; i < ii; i++) {
          annotationPromises.push(_annotation.AnnotationFactory.create(_this4.xref, annotationRefs[i], _this4.pdfManager, _this4.idFactory));
        }
        return Promise.all(annotationPromises).then(function (annotations) {
          return annotations.filter(function isDefined(annotation) {
            return !!annotation;
          });
        }, function (reason) {
          (0, _util.warn)('_parsedAnnotations: "' + reason + '".');
          return [];
        });