pdfjs-dist/lib/web/pdf_document_properties.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 uiUtils = require('./ui_utils.js');
var overlayManager = require('./overlay_manager.js');
var getPDFFileNameFromURL = uiUtils.getPDFFileNameFromURL;
var mozL10n = uiUtils.mozL10n;
var OverlayManager = overlayManager.OverlayManager;
var PDFDocumentProperties = function PDFDocumentPropertiesClosure() {
 function PDFDocumentProperties(options) {
  this.fields = options.fields;
  this.overlayName = options.overlayName;
  this.container = options.container;
  this.rawFileSize = 0;
  this.url = null;
  this.pdfDocument = null;
  if (options.closeButton) {
   options.closeButton.addEventListener('click', this.close.bind(this));
  }
  this.dataAvailablePromise = new Promise(function (resolve) {
   this.resolveDataAvailable = resolve;
  }.bind(this));
  OverlayManager.register(this.overlayName, this.container, this.close.bind(this));
 }
 PDFDocumentProperties.prototype = {
  open: function PDFDocumentProperties_open() {
   Promise.all([
    OverlayManager.open(this.overlayName),
    this.dataAvailablePromise
   ]).then(function () {
    this._getProperties();
   }.bind(this));
  },
  close: function PDFDocumentProperties_close() {
   OverlayManager.close(this.overlayName);
  },
  setFileSize: function PDFDocumentProperties_setFileSize(fileSize) {
   if (fileSize > 0) {
    this.rawFileSize = fileSize;
   }
  },
  setDocumentAndUrl: function PDFDocumentProperties_setDocumentAndUrl(pdfDocument, url) {
   this.pdfDocument = pdfDocument;
   this.url = url;
   this.resolveDataAvailable();
  },
  _getProperties: function PDFDocumentProperties_getProperties() {
   if (!OverlayManager.active) {
    return;
   }
   this.pdfDocument.getDownloadInfo().then(function (data) {
    if (data.length === this.rawFileSize) {
     return;
    }
    this.setFileSize(data.length);
    this._updateUI(this.fields['fileSize'], this._parseFileSize());
   }.bind(this));
   this.pdfDocument.getMetadata().then(function (data) {
    var content = {
     'fileName': getPDFFileNameFromURL(this.url),
     'fileSize': this._parseFileSize(),
     'title': data.info.Title,
     'author': data.info.Author,
     'subject': data.info.Subject,
     'keywords': data.info.Keywords,
     'creationDate': this._parseDate(data.info.CreationDate),
     'modificationDate': this._parseDate(data.info.ModDate),
     'creator': data.info.Creator,
     'producer': data.info.Producer,
     'version': data.info.PDFFormatVersion,
     'pageCount': this.pdfDocument.numPages
    };
    for (var identifier in content) {
     this._updateUI(this.fields[identifier], content[identifier]);
    }
   }.bind(this));
  },
  _updateUI: function PDFDocumentProperties_updateUI(field, content) {
   if (field && content !== undefined && content !== '') {
    field.textContent = content;
   }
  },
  _parseFileSize: function PDFDocumentProperties_parseFileSize() {
   var fileSize = this.rawFileSize, kb = fileSize / 1024;
   if (!kb) {
    return;
   } else if (kb < 1024) {
    return mozL10n.get('document_properties_kb', {
     size_kb: (+kb.toPrecision(3)).toLocaleString(),
     size_b: fileSize.toLocaleString()
    }, '{{size_kb}} KB ({{size_b}} bytes)');
   }
   return mozL10n.get('document_properties_mb', {
    size_mb: (+(kb / 1024).toPrecision(3)).toLocaleString(),
    size_b: fileSize.toLocaleString()
   }, '{{size_mb}} MB ({{size_b}} bytes)');
  },
  _parseDate: function PDFDocumentProperties_parseDate(inputDate) {
   var dateToParse = inputDate;
   if (dateToParse === undefined) {
    return '';
   }
   if (dateToParse.substring(0, 2) === 'D:') {
    dateToParse = dateToParse.substring(2);
   }
   var year = parseInt(dateToParse.substring(0, 4), 10);
   var month = parseInt(dateToParse.substring(4, 6), 10) - 1;
   var day = parseInt(dateToParse.substring(6, 8), 10);
   var hours = parseInt(dateToParse.substring(8, 10), 10);
   var minutes = parseInt(dateToParse.substring(10, 12), 10);
   var seconds = parseInt(dateToParse.substring(12, 14), 10);
   var utRel = dateToParse.substring(14, 15);
   var offsetHours = parseInt(dateToParse.substring(15, 17), 10);
   var offsetMinutes = parseInt(dateToParse.substring(18, 20), 10);
   if (utRel === '-') {
    hours += offsetHours;
    minutes += offsetMinutes;
   } else if (utRel === '+') {
    hours -= offsetHours;
    minutes -= offsetMinutes;
   }
   var date = new Date(Date.UTC(year, month, day, hours, minutes, seconds));
   var dateString = date.toLocaleDateString();
   var timeString = date.toLocaleTimeString();
   return mozL10n.get('document_properties_date_string', {
    date: dateString,
    time: timeString
   }, '{{date}}, {{time}}');
  }
 };
 return PDFDocumentProperties;
}();
exports.PDFDocumentProperties = PDFDocumentProperties;