ui/app/static/js/textlayer_pdfjs.js

/* Copyright 2014 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.
 */

'use strict';

if (!pdfjsLib.getDocument || !pdfjsViewer.PDFPageView) {
  alert('Please build the pdfjs-dist library using\n' +
        '  `gulp dist-install`');
}


var DEFAULT_URL = {{og_filename}};
var PAGE_TO_VIEW = 1;
var SCALE = 1.0;

var container = document.getElementById('pageContainer');

// Loading document.
var loadingTask = pdfjsLib.getDocument({
  url: DEFAULT_URL,
  cMapUrl: CMAP_URL,
  cMapPacked: CMAP_PACKED,
});
loadingTask.promise.then(function(pdfDocument) {
  // Document loaded, retrieving the page.
  return pdfDocument.getPage(PAGE_TO_VIEW).then(function (pdfPage) {
    // Creating the page view with default parameters.
    var pdfPageView = new pdfjsViewer.PDFPageView({
      container: container,
      id: PAGE_TO_VIEW,
      scale: SCALE,
      defaultViewport: pdfPage.getViewport({ scale: SCALE, }),
      // We can enable text/annotations layers, if needed
      textLayerFactory: new pdfjsViewer.DefaultTextLayerFactory(),
      annotationLayerFactory: new pdfjsViewer.DefaultAnnotationLayerFactory(),
    });
    // Associates the actual page with the view, and drawing it
    pdfPageView.setPdfPage(pdfPage);
    return pdfPageView.draw();
  });
});