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/**
* @copyright Copyright (c) 2020 John Molakvoæ <skjnldsv@protonmail.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 { generateUrl } from '@nextcloud/router'
import logger from './services/logger'
import canDownload from './utils/canDownload'
import isPublicPage from './utils/isPublicPage'
import isPdf from './utils/isPdf'
import isSecureViewerAvailable from './utils/isSecureViewerAvailable'
window.addEventListener('DOMContentLoaded', function() {
logger.debug('Initializing for public page', {
isPublicPage: isPublicPage(),
canDownload: canDownload(),
isSecureViewerAvailable: isSecureViewerAvailable(),
})
if (isPublicPage() && isPdf() && !isSecureViewerAvailable()) {
const page = location.hash.split('page=')[1] || 0
const contentElmt = document.getElementById('files-public-content')
const sharingTokenElmt = document.getElementById('sharingToken')
const footerElmt = document.querySelector('#app-content > footer')
const sharingToken = sharingTokenElmt.value
const downloadUrl = generateUrl('/s/{token}/download', { token: sharingToken })
const viewerUrl = generateUrl('/apps/files_pdfviewer/?file={downloadUrl}#page={page}', { downloadUrl, page })
// Create viewer frame
const viewerNode = document.createElement('iframe')
viewerNode.style.height = '100%'
viewerNode.style.width = '100%'
viewerNode.style.position = 'absolute'
// Inject viewer
if (contentElmt) {
contentElmt.innerHTML = ''
contentElmt.appendChild(viewerNode)
viewerNode.src = viewerUrl
footerElmt.style.display = 'none'
} else {
logger.error('Unable to inject the PDF Viewer')
}
// When pdf viewer is loaded
addEventListener('load', function() {
// If we forbid download, prevent interaction
if (!canDownload()) {
const pdfViewer = viewerNode.contentDocument.querySelector('.pdfViewer')
const PDFViewerApplication = viewerNode.contentWindow.PDFViewerApplication
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, printing and user interaction disabled')
}
})
} else {
logger.error('But this does not appear to be a public page')
}
})
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