@intelllex/react-pdf/es/PdfViewer/PDFThumbBar/index.js

Intelllex React PDF

import _regeneratorRuntime from "@babel/runtime/regenerator";

function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }

function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }

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

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

/* eslint-disable */
import React, { PureComponent } from 'react';
import Thumbnail from './Thumbnail';
import './index.scss';

var PDFThumbbar = /*#__PURE__*/function (_PureComponent) {
  _inheritsLoose(PDFThumbbar, _PureComponent);

  function PDFThumbbar() {
    var _this;

    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    _this = _PureComponent.call.apply(_PureComponent, [this].concat(args)) || this;

    _defineProperty(_assertThisInitialized(_this), "state", {
      thumbnails: []
    });

    _defineProperty(_assertThisInitialized(_this), "loadThumbnailsData", /*#__PURE__*/function () {
      var _ref = _asyncToGenerator( /*#__PURE__*/_regeneratorRuntime.mark(function _callee(pdf) {
        var pages, thumbnails;
        return _regeneratorRuntime.wrap(function _callee$(_context) {
          while (1) {
            switch (_context.prev = _context.next) {
              case 0:
                pages = [];

                while (pages.length < pdf.numPages) {
                  pages.push(pages.length + 1);
                }

                _context.next = 4;
                return Promise.all(pages.map(function (num) {
                  return pdf.getPage(num).then(_this.makeThumb).then(function (url) {
                    return {
                      thumbnailSrc: url,
                      pageNum: num
                    };
                  });
                }));

              case 4:
                thumbnails = _context.sent;

                _this.setState({
                  thumbnails: thumbnails
                });

              case 6:
              case "end":
                return _context.stop();
            }
          }
        }, _callee);
      }));

      return function (_x) {
        return _ref.apply(this, arguments);
      };
    }());

    _defineProperty(_assertThisInitialized(_this), "makeThumb", function (page) {
      var viewport = page.getViewport(1.0);
      var canvas = document.createElement('canvas');
      canvas.height = viewport.height;
      canvas.width = viewport.width;
      return page.render({
        canvasContext: canvas.getContext('2d'),
        viewport: viewport
      }).promise.then(function () {
        var src = canvas.toDataURL();
        canvas.width = 0;
        canvas.height = 0;
        return src;
      });
    });

    return _this;
  }

  var _proto = PDFThumbbar.prototype;

  _proto.componentDidMount = function componentDidMount() {
    if (this.props.pdf) {
      this.loadThumbnailsData(this.props.pdf);
    }
  };

  _proto.componentWillReceiveProps = function componentWillReceiveProps(nextProps) {
    if (nextProps.pdf && !this.state.thumbnails.length) {
      this.loadThumbnailsData(nextProps.pdf);
    }
  };

  _proto.render = function render() {
    var thumbnails = this.state.thumbnails;
    var _this$props = this.props,
        currentPage = _this$props.currentPage,
        setCurrentPage = _this$props.setCurrentPage,
        showThumbSidebar = _this$props.showThumbSidebar;

    if (!thumbnails.length) {
      return null;
    }

    return /*#__PURE__*/React.createElement("div", {
      className: "pdf-thumbnail-bar " + (!showThumbSidebar ? 'hide' : '')
    }, thumbnails.map(function (thumbnail) {
      return /*#__PURE__*/React.createElement(Thumbnail, {
        key: thumbnail.pageNum,
        data: thumbnail,
        currentPage: currentPage,
        setCurrentPage: setCurrentPage
      });
    }));
  };

  return PDFThumbbar;
}(PureComponent);

export default PDFThumbbar;