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/**
* @copyright Copyright (c) 2020 Daniel Calviño Sánchez <danxuliu@gmail.com>
*
* @author Daniel Calviño Sánchez <danxuliu@gmail.com>
* @author John Molakvoæ <skjnldsv@protonmail.com>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
import logger from './services/logger'
import redirectIfNotIframe from './utils/redirectIfNotIframe'
// Checks if the page is displayed in an iframe. If not redirect to /.
redirectIfNotIframe()
// Retrieve the canDownload from the url, this is
// the most easy way to pass the prop to this iframe
const queryString = window.location.search
const urlParams = new URLSearchParams(queryString)
const canDownload = urlParams.get('canDownload')
// When "PDFViewerApplication.webViewerInitialized" is executed (once
// "PDFViewerApplication.initialize" is done) it opens the PDF file via URL,
// which requires the PDFViewerApplication to be properly configured, so the
// custom initialization has to be executed before that. This can be done by
// listening to the "webviewerloaded" event, which is emitted after
// "PDFViewerApplication" and "PDFViewerApplicationOptions" are globally set and
// before "PDFViewerApplication.initialize" is executed.
function initializeCustomPDFViewerApplication() {
// Preferences override options, so they must be disabled for
// "externalLinkTarget" to take effect.
PDFViewerApplicationOptions.set('disablePreferences', true)
PDFViewerApplicationOptions.set('externalLinkTarget', pdfjsLib.LinkTarget.BLANK)
PDFViewerApplicationOptions.set('isEvalSupported', false)
PDFViewerApplicationOptions.set('workerSrc', document.getElementsByTagName('head')[0].getAttribute('data-workersrc'))
PDFViewerApplicationOptions.set('cMapUrl', document.getElementsByTagName('head')[0].getAttribute('data-cmapurl'))
PDFViewerApplicationOptions.set('enablePermissions', true)
if (canDownload === '0') {
const pdfViewer = window.document.querySelector('.pdfViewer')
if (pdfViewer) {
pdfViewer.classList.add('disabledTextSelection')
}
if (PDFViewerApplication) {
// Disable download function when downloads are hidden, as even if the
// buttons in the UI are hidden the download could still be triggered
// with Ctrl|Meta+S.
PDFViewerApplication.download = function() {
}
// Disable printing service when downloads are hidden, as even if the
// buttons in the UI are hidden the printing could still be triggered
// with Ctrl|Meta+P.
// Abuse the "supportsPrinting" parameter, which signals that the
// browser does not fully support printing, to make PDFViewer disable
// the printing service.
// "supportsPrinting" is a getter function, so it needs to be deleted
// before replacing it with a simple value.
delete PDFViewerApplication.supportsPrinting
PDFViewerApplication.supportsPrinting = false
// When printing is not supported a warning is shown by the default
// "beforePrint" function when trying to print. That function needs to
// be replaced with an empty one to prevent that warning to be shown.
PDFViewerApplication.beforePrint = function() {
}
}
logger.info('Download, print and user interaction disabled')
} else {
logger.info('Download and print available')
}
logger.debug('Initialized files_pdfviewer', PDFViewerApplicationOptions.getAll())
}
document.addEventListener('DOMContentLoaded', initializeCustomPDFViewerApplication, true)
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