pdfjs-dist/lib/web/pdf_viewer.js

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2019 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @licend The above is the entire license notice for the
 * Javascript code in this page
 */
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.PDFViewer = void 0;

var _base_viewer = require("./base_viewer");

var _pdf = require("../pdf");

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

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

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

function _get(target, property, receiver) { if (typeof Reflect !== "undefined" && Reflect.get) { _get = Reflect.get; } else { _get = function _get(target, property, receiver) { var base = _superPropBase(target, property); if (!base) return; var desc = Object.getOwnPropertyDescriptor(base, property); if (desc.get) { return desc.get.call(receiver); } return desc.value; }; } return _get(target, property, receiver || target); }

function _superPropBase(object, property) { while (!Object.prototype.hasOwnProperty.call(object, property)) { object = _getPrototypeOf(object); if (object === null) break; } return object; }

function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }

function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }

var PDFViewer =
/*#__PURE__*/
function (_BaseViewer) {
  _inherits(PDFViewer, _BaseViewer);

  function PDFViewer() {
    _classCallCheck(this, PDFViewer);

    return _possibleConstructorReturn(this, _getPrototypeOf(PDFViewer).apply(this, arguments));
  }

  _createClass(PDFViewer, [{
    key: "_scrollIntoView",
    value: function _scrollIntoView(_ref) {
      var pageDiv = _ref.pageDiv,
          _ref$pageSpot = _ref.pageSpot,
          pageSpot = _ref$pageSpot === void 0 ? null : _ref$pageSpot,
          _ref$pageNumber = _ref.pageNumber,
          pageNumber = _ref$pageNumber === void 0 ? null : _ref$pageNumber;

      if (!pageSpot && !this.isInPresentationMode) {
        var left = pageDiv.offsetLeft + pageDiv.clientLeft;
        var right = left + pageDiv.clientWidth;
        var _this$container = this.container,
            scrollLeft = _this$container.scrollLeft,
            clientWidth = _this$container.clientWidth;

        if (this._isScrollModeHorizontal || left < scrollLeft || right > scrollLeft + clientWidth) {
          pageSpot = {
            left: 0,
            top: 0
          };
        }
      }

      _get(_getPrototypeOf(PDFViewer.prototype), "_scrollIntoView", this).call(this, {
        pageDiv: pageDiv,
        pageSpot: pageSpot,
        pageNumber: pageNumber
      });
    }
  }, {
    key: "_getVisiblePages",
    value: function _getVisiblePages() {
      if (this.isInPresentationMode) {
        return this._getCurrentVisiblePage();
      }

      return _get(_getPrototypeOf(PDFViewer.prototype), "_getVisiblePages", this).call(this);
    }
  }, {
    key: "_updateHelper",
    value: function _updateHelper(visiblePages) {
      if (this.isInPresentationMode) {
        return;
      }

      var currentId = this._currentPageNumber;
      var stillFullyVisible = false;
      var _iteratorNormalCompletion = true;
      var _didIteratorError = false;
      var _iteratorError = undefined;

      try {
        for (var _iterator = visiblePages[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
          var page = _step.value;

          if (page.percent < 100) {
            break;
          }

          if (page.id === currentId) {
            stillFullyVisible = true;
            break;
          }
        }
      } catch (err) {
        _didIteratorError = true;
        _iteratorError = err;
      } finally {
        try {
          if (!_iteratorNormalCompletion && _iterator["return"] != null) {
            _iterator["return"]();
          }
        } finally {
          if (_didIteratorError) {
            throw _iteratorError;
          }
        }
      }

      if (!stillFullyVisible) {
        currentId = visiblePages[0].id;
      }

      this._setCurrentPageNumber(currentId);
    }
  }, {
    key: "_setDocumentViewerElement",
    get: function get() {
      return (0, _pdf.shadow)(this, '_setDocumentViewerElement', this.viewer);
    }
  }]);

  return PDFViewer;
}(_base_viewer.BaseViewer);

exports.PDFViewer = PDFViewer;