pdfjs-dist/lib/web/pdf_attachment_viewer.js

/* Copyright 2017 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';
var pdfjsLib = require('./pdfjs.js');
var PDFAttachmentViewer = function PDFAttachmentViewerClosure() {
 function PDFAttachmentViewer(options) {
  this.attachments = null;
  this.container = options.container;
  this.eventBus = options.eventBus;
  this.downloadManager = options.downloadManager;
  this._renderedCapability = pdfjsLib.createPromiseCapability();
  this.eventBus.on('fileattachmentannotation', this._appendAttachment.bind(this));
 }
 PDFAttachmentViewer.prototype = {
  reset: function PDFAttachmentViewer_reset(keepRenderedCapability) {
   this.attachments = null;
   this.container.textContent = '';
   if (!keepRenderedCapability) {
    this._renderedCapability = pdfjsLib.createPromiseCapability();
   }
  },
  _dispatchEvent: function PDFAttachmentViewer_dispatchEvent(attachmentsCount) {
   this.eventBus.dispatch('attachmentsloaded', {
    source: this,
    attachmentsCount: attachmentsCount
   });
   this._renderedCapability.resolve();
  },
  _bindPdfLink: function PDFAttachmentViewer_bindPdfLink(button, content, filename) {
   var blobUrl;
   button.onclick = function () {
    if (!blobUrl) {
     blobUrl = pdfjsLib.createObjectURL(content, 'application/pdf', pdfjsLib.PDFJS.disableCreateObjectURL);
    }
    var viewerUrl;
    viewerUrl = '?file=' + encodeURIComponent(blobUrl + '#' + filename);
    window.open(viewerUrl);
    return false;
   };
  },
  _bindLink: function PDFAttachmentViewer_bindLink(button, content, filename) {
   button.onclick = function downloadFile(e) {
    this.downloadManager.downloadData(content, filename, '');
    return false;
   }.bind(this);
  },
  render: function PDFAttachmentViewer_render(params) {
   params = params || {};
   var attachments = params.attachments || null;
   var attachmentsCount = 0;
   if (this.attachments) {
    var keepRenderedCapability = params.keepRenderedCapability === true;
    this.reset(keepRenderedCapability);
   }
   this.attachments = attachments;
   if (!attachments) {
    this._dispatchEvent(attachmentsCount);
    return;
   }
   var names = Object.keys(attachments).sort(function (a, b) {
    return a.toLowerCase().localeCompare(b.toLowerCase());
   });
   attachmentsCount = names.length;
   for (var i = 0; i < attachmentsCount; i++) {
    var item = attachments[names[i]];
    var filename = pdfjsLib.getFilenameFromUrl(item.filename);
    filename = pdfjsLib.removeNullCharacters(filename);
    var div = document.createElement('div');
    div.className = 'attachmentsItem';
    var button = document.createElement('button');
    button.textContent = filename;
    if (/\.pdf$/i.test(filename)) {
     this._bindPdfLink(button, item.content, filename);
    } else {
     this._bindLink(button, item.content, filename);
    }
    div.appendChild(button);
    this.container.appendChild(div);
   }
   this._dispatchEvent(attachmentsCount);
  },
  _appendAttachment: function PDFAttachmentViewer_appendAttachment(item) {
   this._renderedCapability.promise.then(function (id, filename, content) {
    var attachments = this.attachments;
    if (!attachments) {
     attachments = Object.create(null);
    } else {
     for (var name in attachments) {
      if (id === name) {
       return;
      }
     }
    }
    attachments[id] = {
     filename: filename,
     content: content
    };
    this.render({
     attachments: attachments,
     keepRenderedCapability: true
    });
   }.bind(this, item.id, item.filename, item.content));
  }
 };
 return PDFAttachmentViewer;
}();
exports.PDFAttachmentViewer = PDFAttachmentViewer;