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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 canDownload from './utils/canDownload'
import redirectIfNotIframe from './utils/redirectIfNotIframe'
/**
* Checks if the page is displayed in an iframe. If not redirect to /.
**/
redirectIfNotIframe()
// 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'))
// The download has to be forced to use the URL of the file; by default
// "PDFViewerApplication.download" uses a blob, but this causes a CSP error
// (at least, in Firefox) when trying to download it.
PDFViewerApplication.download = function() {
// "isDataSchema()" and "getPDFFileNameFromURL()" are copied from
// "vendor/pdfjs/web/viewer.js", as the functions defined in that file
// can not be accessed from the outside.
function isDataSchema(url) {
let i = 0
const ii = url.length
while (i < ii && url[i].trim() === '') {
i++
}
return url.substr(i, 5).toLowerCase() === 'data:'
}
function getPDFFileNameFromURL(url) {
const defaultFilename = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'document.pdf'
if (isDataSchema(url)) {
console.warn('getPDFFileNameFromURL: ' + 'ignoring "data:" URL for performance reasons.')
return defaultFilename
}
const reURI = /^(?:(?:[^:]+:)?\/\/[^/]+)?([^?#]*)(\?[^#]*)?(#.*)?$/
const reFilename = /[^/?#=]+\.pdf\b(?!.*\.pdf\b)/i
const splitURI = reURI.exec(url)
let suggestedFilename = reFilename.exec(splitURI[1]) || reFilename.exec(splitURI[2]) || reFilename.exec(splitURI[3])
if (suggestedFilename) {
suggestedFilename = suggestedFilename[0]
if (suggestedFilename.indexOf('%') !== -1) {
try {
suggestedFilename = reFilename.exec(decodeURIComponent(suggestedFilename))[0]
} catch (e) {
console.debug(e)
}
}
}
return suggestedFilename || defaultFilename
}
const url = decodeURIComponent(window.location.search.substr(6))
this.downloadManager.downloadUrl(url, getPDFFileNameFromURL(url))
}
if (!canDownload()) {
// 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() {
}
const downloadButton = document.getElementById('toolbarViewerRight').querySelector('button.download')
if (downloadButton) {
downloadButton.style.display = 'none'
}
// 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() {
}
// For css properties
document.getElementById('viewer').classList.add('disabledTextSelection')
console.debug('Files_PDFViewer, download and print disabled')
}
}
document.addEventListener('webviewerloaded', initializeCustomPDFViewerApplication, true)
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