/**
* PrivateBin
*
* a zero-knowledge paste bin
*
* @see {@link https://github.com/PrivateBin/PrivateBin}
* @copyright 2012 Sébastien SAUVAGE ({@link http://sebsauvage.net})
* @license {@link https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License}
* @version 1.2.2
* @name PrivateBin
* @namespace
*/
/** global: Base64 */
/** global: DOMPurify */
/** global: FileReader */
/** global: RawDeflate */
/** global: history */
/** global: navigator */
/** global: prettyPrint */
/** global: prettyPrintOne */
/** global: showdown */
/** global: sjcl */
/** global: kjua */
// Immediately start random number generator collector.
sjcl.random.startCollectors();
// Setting this to 10 ensures 1024 bits of entropy get collected before generating the paste key
sjcl.random.setDefaultParanoia(10);
// main application start, called when DOM is fully loaded
jQuery(document).ready(function() {
'use strict';
// run main controller
$.PrivateBin.Controller.init();
});
jQuery.PrivateBin = (function($, sjcl, Base64, RawDeflate) {
'use strict';
/**
* static Helper methods
*
* @name Helper
* @class
*/
var Helper = (function () {
var me = {};
/**
* blacklist of UserAgents (parts) known to belong to a bot
*
* @private
* @enum {Object}
* @readonly
*/
var BadBotUA = [
'Bot',
'bot'
];
/**
* cache for script location
*
* @name Helper.baseUri
* @private
* @enum {string|null}
*/
var baseUri = null;
/**
* converts a duration (in seconds) into human friendly approximation
*
* @name Helper.secondsToHuman
* @function
* @param {number} seconds
* @return {Array}
*/
me.secondsToHuman = function(seconds)
{
var v;
if (seconds < 60)
{
v = Math.floor(seconds);
return [v, 'second'];
}
if (seconds < 60 * 60)
{
v = Math.floor(seconds / 60);
return [v, 'minute'];
}
if (seconds < 60 * 60 * 24)
{
v = Math.floor(seconds / (60 * 60));
return [v, 'hour'];
}
// If less than 2 months, display in days:
if (seconds < 60 * 60 * 24 * 60)
{
v = Math.floor(seconds / (60 * 60 * 24));
return [v, 'day'];
}
v = Math.floor(seconds / (60 * 60 * 24 * 30));
return [v, 'month'];
};
/**
* text range selection
*
* @see {@link https://stackoverflow.com/questions/985272/jquery-selecting-text-in-an-element-akin-to-highlighting-with-your-mouse}
* @name Helper.selectText
* @function
* @param {HTMLElement} element
*/
me.selectText = function(element)
{
var range, selection;
// MS
if (document.body.createTextRange) {
range = document.body.createTextRange();
range.moveToElementText(element);
range.select();
} else if (window.getSelection) {
selection = window.getSelection();
range = document.createRange();
range.selectNodeContents(element);
selection.removeAllRanges();
selection.addRange(range);
}
};
/**
* convert URLs to clickable links.
* URLs to handle:
*
* magnet:?xt.1=urn:sha1:YNCKHTQCWBTRNJIV4WNAE52SJUQCZO5C&xt.2=urn:sha1:TXGCZQTH26NL6OUQAJJPFALHG2LTGBC7
* https://example.com:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
* http://user:example.com@localhost:8800/zero/?6f09182b8ea51997#WtLEUO5Epj9UHAV9JFs+6pUQZp13TuspAUjnF+iM+dM=
*
*
* @name Helper.urls2links
* @function
* @param {string} html
* @return {string}
*/
me.urls2links = function(html)
{
return html.replace(
/(((https?|ftp):\/\/[\w?!=&.\/-;#@~%+*-]+(?![\w\s?!&.\/;#~%"=-]*>))|((magnet):[\w?=&.\/-;#@~%+*-]+))/ig,
'$1'
);
};
/**
* minimal sprintf emulation for %s and %d formats
*
* Note that this function needs the parameters in the same order as the
* format strings appear in the string, contrary to the original.
*
* @see {@link https://stackoverflow.com/questions/610406/javascript-equivalent-to-printf-string-format#4795914}
* @name Helper.sprintf
* @function
* @param {string} format
* @param {...*} args - one or multiple parameters injected into format string
* @return {string}
*/
me.sprintf = function()
{
var args = Array.prototype.slice.call(arguments);
var format = args[0],
i = 1;
return format.replace(/%(s|d)/g, function (m) {
// m is the matched format, e.g. %s, %d
var val = args[i];
// A switch statement so that the formatter can be extended.
switch (m)
{
case '%d':
val = parseFloat(val);
if (isNaN(val)) {
val = 0;
}
break;
default:
// Default is %s
}
++i;
return val;
});
};
/**
* get value of cookie, if it was set, empty string otherwise
*
* @see {@link http://www.w3schools.com/js/js_cookies.asp}
* @name Helper.getCookie
* @function
* @param {string} cname - may not be empty
* @return {string}
*/
me.getCookie = function(cname) {
var name = cname + '=',
ca = document.cookie.split(';');
for (var i = 0; i < ca.length; ++i) {
var c = ca[i];
while (c.charAt(0) === ' ')
{
c = c.substring(1);
}
if (c.indexOf(name) === 0)
{
return c.substring(name.length, c.length);
}
}
return '';
};
/**
* get the current location (without search or hash part of the URL),
* eg. https://example.com/path/?aaaa#bbbb --> https://example.com/path/
*
* @name Helper.baseUri
* @function
* @return {string}
*/
me.baseUri = function()
{
// check for cached version
if (baseUri !== null) {
return baseUri;
}
// window.location.origin is a newer alternative, but requires FF 21 / Chrome 31 / Safari 7 / IE 11
baseUri = window.location.protocol + '//' + window.location.host + window.location.pathname;
return baseUri;
};
/**
* resets state, used for unit testing
*
* @name Helper.reset
* @function
*/
me.reset = function()
{
baseUri = null;
};
/**
* checks whether this is a bot we dislike
*
* @name Helper.isBadBot
* @function
* @return {bool}
*/
me.isBadBot = function() {
// check whether a bot user agent part can be found in the current
// user agent
var arrayLength = BadBotUA.length;
for (var i = 0; i < arrayLength; i++) {
if (navigator.userAgent.indexOf(BadBotUA) >= 0) {
return true;
}
}
return false;
}
/**
* encode all applicable characters to HTML entities
*
* @see {@link https://cheatsheetseries.owasp.org/cheatsheets/Cross_Site_Scripting_Prevention_Cheat_Sheet.html}
*
* @name Helper.htmlEntities
* @function
* @param string str
* @return string escaped HTML
*/
me.htmlEntities = function(str) {
// using textarea, since other tags may allow and execute scripts, even when detached from DOM
let holder = document.createElement('textarea');
holder.textContent = str;
// as per OWASP recommendation, also encoding quotes and slash
return holder.innerHTML.replace(
/["'\/]/g,
function(s) {
return {
'"': '"',
"'": ''',
'/': '/'
}[s];
});
};
return me;
})();
/**
* internationalization module
*
* @name I18n
* @class
*/
var I18n = (function () {
var me = {};
/**
* const for string of loaded language
*
* @name I18n.languageLoadedEvent
* @private
* @prop {string}
* @readonly
*/
var languageLoadedEvent = 'languageLoaded';
/**
* supported languages, minus the built in 'en'
*
* @name I18n.supportedLanguages
* @private
* @prop {string[]}
* @readonly
*/
var supportedLanguages = ['de', 'es', 'fr', 'it', 'hu', 'no', 'nl', 'pl', 'pt', 'oc', 'ru', 'sl', 'zh'];
/**
* built in language
*
* @name I18n.language
* @private
* @prop {string|null}
*/
var language = null;
/**
* translation cache
*
* @name I18n.translations
* @private
* @enum {Object}
*/
var translations = {};
/**
* translate a string, alias for I18n.translate
*
* @name I18n._
* @function
* @param {jQuery} $element - optional
* @param {string} messageId
* @param {...*} args - one or multiple parameters injected into placeholders
* @return {string}
*/
me._ = function()
{
return me.translate.apply(this, arguments);
};
/**
* translate a string
*
* Optionally pass a jQuery element as the first parameter, to automatically
* let the text of this element be replaced. In case the (asynchronously
* loaded) language is not downloadet yet, this will make sure the string
* is replaced when it is actually loaded.
* So for easy translations passing the jQuery object to apply it to is
* more save, especially when they are loaded in the beginning.
*
* @name I18n.translate
* @function
* @param {jQuery} $element - optional
* @param {string} messageId
* @param {...*} args - one or multiple parameters injected into placeholders
* @return {string}
*/
me.translate = function()
{
// convert parameters to array
var args = Array.prototype.slice.call(arguments),
messageId,
$element = null;
// parse arguments
if (args[0] instanceof jQuery) {
// optional jQuery element as first parameter
$element = args[0];
args.shift();
}
// extract messageId from arguments
var usesPlurals = $.isArray(args[0]);
if (usesPlurals) {
// use the first plural form as messageId, otherwise the singular
messageId = args[0].length > 1 ? args[0][1] : args[0][0];
} else {
messageId = args[0];
}
if (messageId.length === 0) {
return messageId;
}
// if no translation string cannot be found (in translations object)
if (!translations.hasOwnProperty(messageId) || language === null) {
// if language is still loading and we have an elemt assigned
if (language === null && $element !== null) {
// handle the error by attaching the language loaded event
var orgArguments = arguments;
$(document).on(languageLoadedEvent, function () {
// log to show that the previous error could be mitigated
console.warn('Fix missing translation of \'' + messageId + '\' with now loaded language ' + language);
// re-execute this function
me.translate.apply(this, orgArguments);
});
// and fall back to English for now until the real language
// file is loaded
}
// for all other languages than English for which this behaviour
// is expected as it is built-in, log error
if (language !== null && language !== 'en') {
console.error('Missing translation for: \'' + messageId + '\' in language ' + language);
// fallback to English
}
// save English translation (should be the same on both sides)
translations[messageId] = args[0];
}
// lookup plural translation
if (usesPlurals && $.isArray(translations[messageId])) {
var n = parseInt(args[1] || 1, 10),
key = me.getPluralForm(n),
maxKey = translations[messageId].length - 1;
if (key > maxKey) {
key = maxKey;
}
args[0] = translations[messageId][key];
args[1] = n;
} else {
// lookup singular translation
args[0] = translations[messageId];
}
// messageID may contain links, but should be from a trusted source (code or translation JSON files)
let containsNoLinks = args[0].indexOf(' 0) may never contain HTML as they may come from untrusted parties
if (i > 0 || containsNoLinks) {
args[i] = Helper.htmlEntities(args[i]);
}
}
// format string
var output = Helper.sprintf.apply(this, args);
// if $element is given, apply text to element
if ($element !== null) {
if (containsNoLinks) {
// avoid HTML entity encoding if translation contains links
$element.text(output);
} else {
// only allow tags/attributes we actually use in our translations
$element.html(
DOMPurify.sanitize(output, {
ALLOWED_TAGS: ['a', 'br', 'i', 'span'],
ALLOWED_ATTR: ['href', 'id']
})
);
}
}
return output;
};
/**
* per language functions to use to determine the plural form
*
* @see {@link http://localization-guide.readthedocs.org/en/latest/l10n/pluralforms.html}
* @name I18n.getPluralForm
* @function
* @param {int} n
* @return {int} array key
*/
me.getPluralForm = function(n) {
switch (language)
{
case 'fr':
case 'oc':
case 'zh':
return n > 1 ? 1 : 0;
case 'pl':
return n === 1 ? 0 : (n % 10 >= 2 && n %10 <=4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);
case 'ru':
return n % 10 === 1 && n % 100 !== 11 ? 0 : (n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2);
case 'sl':
return n % 100 === 1 ? 1 : (n % 100 === 2 ? 2 : (n % 100 === 3 || n % 100 === 4 ? 3 : 0));
// de, en, es, hu, it, nl, no, pt
default:
return n !== 1 ? 1 : 0;
}
};
/**
* load translations into cache
*
* @name I18n.loadTranslations
* @function
*/
me.loadTranslations = function()
{
var newLanguage = Helper.getCookie('lang');
// auto-select language based on browser settings
if (newLanguage.length === 0) {
newLanguage = (navigator.language || navigator.userLanguage || 'en').substring(0, 2);
}
// if language is already used skip update
if (newLanguage === language) {
return;
}
// if language is built-in (English) skip update
if (newLanguage === 'en') {
language = 'en';
return;
}
// if language is not supported, show error
if (supportedLanguages.indexOf(newLanguage) === -1) {
console.error('Language \'%s\' is not supported. Translation failed, fallback to English.', newLanguage);
language = 'en';
return;
}
// load strings from JSON
$.getJSON('i18n/' + newLanguage + '.json', function(data) {
language = newLanguage;
translations = data;
$(document).triggerHandler(languageLoadedEvent);
}).fail(function (data, textStatus, errorMsg) {
console.error('Language \'%s\' could not be loaded (%s: %s). Translation failed, fallback to English.', newLanguage, textStatus, errorMsg);
language = 'en';
});
};
/**
* resets state, used for unit testing
*
* @name I18n.reset
* @function
*/
me.reset = function(mockLanguage, mockTranslations)
{
language = mockLanguage || null;
translations = mockTranslations || {};
};
return me;
})();
/**
* handles everything related to en/decryption
*
* @name CryptTool
* @class
*/
var CryptTool = (function () {
var me = {};
/**
* compress a message (deflate compression), returns base64 encoded data
*
* @name CryptTool.compress
* @function
* @private
* @param {string} message
* @return {string} base64 data
*/
function compress(message)
{
return Base64.toBase64( RawDeflate.deflate( Base64.utob(message) ) );
}
/**
* decompress a message compressed with cryptToolcompress()
*
* @name CryptTool.decompress
* @function
* @private
* @param {string} data - base64 data
* @return {string} message
*/
function decompress(data)
{
return Base64.btou( RawDeflate.inflate( Base64.fromBase64(data) ) );
}
/**
* compress, then encrypt message with given key and password
*
* @name CryptTool.cipher
* @function
* @param {string} key
* @param {string} password
* @param {string} message
* @return {string} data - JSON with encrypted data
*/
me.cipher = function(key, password, message)
{
// Galois Counter Mode, keysize 256 bit, authentication tag 128 bit
var options = {
mode: 'gcm',
ks: 256,
ts: 128
};
if ((password || '').trim().length === 0) {
return sjcl.encrypt(key, compress(message), options);
}
return sjcl.encrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(password)), compress(message), options);
};
/**
* decrypt message with key, then decompress
*
* @name CryptTool.decipher
* @function
* @param {string} key
* @param {string} password
* @param {string} data - JSON with encrypted data
* @return {string} decrypted message, empty if decryption failed
*/
me.decipher = function(key, password, data)
{
if (data !== undefined) {
try {
return decompress(sjcl.decrypt(key, data));
} catch(err) {
try {
return decompress(sjcl.decrypt(key + sjcl.codec.hex.fromBits(sjcl.hash.sha256.hash(password)), data));
} catch(e) {
return '';
}
}
}
};
/**
* checks whether the crypt tool has collected enough entropy
*
* @name CryptTool.isEntropyReady
* @function
* @return {bool}
*/
me.isEntropyReady = function()
{
return sjcl.random.isReady();
};
/**
* add a listener function, triggered when enough entropy is available
*
* @name CryptTool.addEntropySeedListener
* @function
* @param {function} func
*/
me.addEntropySeedListener = function(func)
{
sjcl.random.addEventListener('seeded', func);
};
/**
* returns a random symmetric key
*
* @name CryptTool.getSymmetricKey
* @function
* @return {string} func
*/
me.getSymmetricKey = function()
{
return sjcl.codec.base64.fromBits(sjcl.random.randomWords(8, 10), 0);
};
return me;
})();
/**
* (Model) Data source (aka MVC)
*
* @name Model
* @class
*/
var Model = (function () {
var me = {};
var pasteData = null,
$templates;
var id = null, symmetricKey = null;
/**
* returns the expiration set in the HTML
*
* @name Model.getExpirationDefault
* @function
* @return string
*/
me.getExpirationDefault = function()
{
return $('#pasteExpiration').val();
};
/**
* returns the format set in the HTML
*
* @name Model.getFormatDefault
* @function
* @return string
*/
me.getFormatDefault = function()
{
return $('#pasteFormatter').val();
};
/**
* returns the paste data (including the cipher data)
*
* @name Model.getPasteData
* @function
* @param {function} callback (optional) Called when data is available
* @param {function} useCache (optional) Whether to use the cache or
* force a data reload. Default: true
* @return string
*/
me.getPasteData = function(callback, useCache)
{
// use cache if possible/allowed
if (useCache !== false && pasteData !== null) {
//execute callback
if (typeof callback === 'function') {
return callback(pasteData);
}
// alternatively just using inline
return pasteData;
}
// reload data
Uploader.prepare();
Uploader.setUrl(Helper.baseUri() + '?' + me.getPasteId());
Uploader.setFailure(function (status, data) {
// revert loading status…
Alert.hideLoading();
TopNav.showViewButtons();
// show error message
Alert.showError(Uploader.parseUploadError(status, data, 'get paste data'));
});
Uploader.setSuccess(function (status, data) {
pasteData = data;
if (typeof callback === 'function') {
return callback(data);
}
});
Uploader.run();
};
/**
* get the pastes unique identifier from the URL,
* eg. https://example.com/path/?c05354954c49a487#dfdsdgdgdfgdf returns c05354954c49a487
*
* @name Model.getPasteId
* @function
* @return {string} unique identifier
* @throws {string}
*/
me.getPasteId = function()
{
if (id === null) {
// Attention: This also returns the delete token inside of the ID, if it is specified
id = window.location.search.substring(1);
if (id === '') {
throw 'no paste id given';
}
}
return id;
}
/**
* Returns true, when the URL has a delete token and the current call was used for deleting a paste.
*
* @name Model.hasDeleteToken
* @function
* @return {bool}
*/
me.hasDeleteToken = function()
{
return window.location.search.indexOf('deletetoken') !== -1;
}
/**
* return the deciphering key stored in anchor part of the URL
*
* @name Model.getPasteKey
* @function
* @return {string|null} key
* @throws {string}
*/
me.getPasteKey = function()
{
if (symmetricKey === null) {
symmetricKey = window.location.hash.substring(1);
if (symmetricKey === '') {
throw 'no encryption key given';
}
// Some web 2.0 services and redirectors add data AFTER the anchor
// (such as &utm_source=...). We will strip any additional data.
var ampersandPos = symmetricKey.indexOf('&');
if (ampersandPos > -1)
{
symmetricKey = symmetricKey.substring(0, ampersandPos);
}
}
return symmetricKey;
};
/**
* returns a jQuery copy of the HTML template
*
* @name Model.getTemplate
* @function
* @param {string} name - the name of the template
* @return {jQuery}
*/
me.getTemplate = function(name)
{
// find template
var $element = $templates.find('#' + name + 'template').clone(true);
// change ID to avoid collisions (one ID should really be unique)
return $element.prop('id', name);
};
/**
* resets state, used for unit testing
*
* @name Model.reset
* @function
*/
me.reset = function()
{
pasteData = $templates = id = symmetricKey = null;
};
/**
* init navigation manager
*
* preloads jQuery elements
*
* @name Model.init
* @function
*/
me.init = function()
{
$templates = $('#templates');
};
return me;
})();
/**
* Helper functions for user interface
*
* everything directly UI-related, which fits nowhere else
*
* @name UiHelper
* @class
*/
var UiHelper = (function () {
var me = {};
/**
* handle history (pop) state changes
*
* currently this does only handle redirects to the home page.
*
* @name UiHelper.historyChange
* @private
* @function
* @param {Event} event
*/
function historyChange(event)
{
var currentLocation = Helper.baseUri();
if (event.originalEvent.state === null && // no state object passed
event.target.location.href === currentLocation && // target location is home page
window.location.href === currentLocation // and we are not already on the home page
) {
// redirect to home page
window.location.href = currentLocation;
}
}
/**
* reload the page
*
* This takes the user to the PrivateBin homepage.
*
* @name UiHelper.reloadHome
* @function
*/
me.reloadHome = function()
{
window.location.href = Helper.baseUri();
};
/**
* checks whether the element is currently visible in the viewport (so
* the user can actually see it)
*
* @see {@link https://stackoverflow.com/a/40658647}
* @name UiHelper.isVisible
* @function
* @param {jQuery} $element The link hash to move to.
*/
me.isVisible = function($element)
{
var elementTop = $element.offset().top;
var viewportTop = $(window).scrollTop();
var viewportBottom = viewportTop + $(window).height();
return elementTop > viewportTop && elementTop < viewportBottom;
};
/**
* scrolls to a specific element
*
* @see {@link https://stackoverflow.com/questions/4198041/jquery-smooth-scroll-to-an-anchor#answer-12714767}
* @name UiHelper.scrollTo
* @function
* @param {jQuery} $element The link hash to move to.
* @param {(number|string)} animationDuration passed to jQuery .animate, when set to 0 the animation is skipped
* @param {string} animationEffect passed to jQuery .animate
* @param {function} finishedCallback function to call after animation finished
*/
me.scrollTo = function($element, animationDuration, animationEffect, finishedCallback)
{
var $body = $('html, body'),
margin = 50,
callbackCalled = false;
//calculate destination place
var dest = 0;
// if it would scroll out of the screen at the bottom only scroll it as
// far as the screen can go
if ($element.offset().top > $(document).height() - $(window).height()) {
dest = $(document).height() - $(window).height();
} else {
dest = $element.offset().top - margin;
}
// skip animation if duration is set to 0
if (animationDuration === 0) {
window.scrollTo(0, dest);
} else {
// stop previous animation
$body.stop();
// scroll to destination
$body.animate({
scrollTop: dest
}, animationDuration, animationEffect);
}
// as we have finished we can enable scrolling again
$body.queue(function (next) {
if (!callbackCalled) {
// call user function if needed
if (typeof finishedCallback !== 'undefined') {
finishedCallback();
}
// prevent calling this function twice
callbackCalled = true;
}
next();
});
};
/**
* trigger a history (pop) state change
*
* used to test the UiHelper.historyChange private function
*
* @name UiHelper.mockHistoryChange
* @function
* @param {string} state (optional) state to mock
*/
me.mockHistoryChange = function(state)
{
if (typeof state === 'undefined') {
state = null;
}
historyChange($.Event('popstate', {originalEvent: new PopStateEvent('popstate', {state: state}), target: window}));
};
/**
* initialize
*
* @name UiHelper.init
* @function
*/
me.init = function()
{
// update link to home page
$('.reloadlink').prop('href', Helper.baseUri());
$(window).on('popstate', historyChange);
};
return me;
})();
/**
* Alert/error manager
*
* @name Alert
* @class
*/
var Alert = (function () {
var me = {};
var $errorMessage,
$loadingIndicator,
$statusMessage,
$remainingTime;
var currentIcon;
var alertType = [
'loading', // not in bootstrap, but using a good value here
'info', // status icon
'warning', // not used yet
'danger' // error icon
];
var customHandler;
/**
* forwards a request to the i18n module and shows the element
*
* @name Alert.handleNotification
* @private
* @function
* @param {int} id - id of notification
* @param {jQuery} $element - jQuery object
* @param {string|array} args
* @param {string|null} icon - optional, icon
*/
function handleNotification(id, $element, args, icon)
{
// basic parsing/conversion of parameters
if (typeof icon === 'undefined') {
icon = null;
}
if (typeof args === 'undefined') {
args = null;
} else if (typeof args === 'string') {
// convert string to array if needed
args = [args];
}
// pass to custom handler if defined
if (typeof customHandler === 'function') {
var handlerResult = customHandler(alertType[id], $element, args, icon);
if (handlerResult === true) {
// if it returns true, skip own handler
return;
}
if (handlerResult instanceof jQuery) {
// continue processing with new element
$element = handlerResult;
icon = null; // icons not supported in this case
}
}
var $translationTarget = $element;
// handle icon, if template uses one
var $glyphIcon = $element.find(':first');
if ($glyphIcon.length) {
// if there is an icon, we need to provide an inner element
// to translate the message into, instead of the parent
$translationTarget = $('');
$element.html(' ').prepend($glyphIcon).append($translationTarget);
if (icon !== null && // icon was passed
icon !== currentIcon[id] // and it differs from current icon
) {
// remove (previous) icon
$glyphIcon.removeClass(currentIcon[id]);
// any other thing as a string (e.g. 'null') (only) removes the icon
if (typeof icon === 'string') {
// set new icon
currentIcon[id] = 'glyphicon-' + icon;
$glyphIcon.addClass(currentIcon[id]);
}
}
}
// show text
if (args !== null) {
// add jQuery object to it as first parameter
args.unshift($translationTarget);
// pass it to I18n
I18n._.apply(this, args);
}
// show notification
$element.removeClass('hidden');
}
/**
* display a status message
*
* This automatically passes the text to I18n for translation.
*
* @name Alert.showStatus
* @function
* @param {string|array} message string, use an array for %s/%d options
* @param {string|null} icon optional, the icon to show,
* default: leave previous icon
*/
me.showStatus = function(message, icon)
{
console.info('status shown: ', message);
handleNotification(1, $statusMessage, message, icon);
};
/**
* display an error message
*
* This automatically passes the text to I18n for translation.
*
* @name Alert.showError
* @function
* @param {string|array} message string, use an array for %s/%d options
* @param {string|null} icon optional, the icon to show, default:
* leave previous icon
*/
me.showError = function(message, icon)
{
console.error('error message shown: ', message);
handleNotification(3, $errorMessage, message, icon);
};
/**
* display remaining message
*
* This automatically passes the text to I18n for translation.
*
* @name Alert.showRemaining
* @function
* @param {string|array} message string, use an array for %s/%d options
*/
me.showRemaining = function(message)
{
console.info('remaining message shown: ', message);
handleNotification(1, $remainingTime, message);
};
/**
* shows a loading message, optionally with a percentage
*
* This automatically passes all texts to the i10s module.
*
* @name Alert.showLoading
* @function
* @param {string|array|null} message optional, use an array for %s/%d options, default: 'Loading…'
* @param {string|null} icon optional, the icon to show, default: leave previous icon
*/
me.showLoading = function(message, icon)
{
if (typeof message !== 'undefined' && message !== null) {
console.info('status changed: ', message);
}
// default message text
if (typeof message === 'undefined') {
message = 'Loading…';
}
handleNotification(0, $loadingIndicator, message, icon);
// show loading status (cursor)
$('body').addClass('loading');
};
/**
* hides the loading message
*
* @name Alert.hideLoading
* @function
*/
me.hideLoading = function()
{
$loadingIndicator.addClass('hidden');
// hide loading cursor
$('body').removeClass('loading');
};
/**
* hides any status/error messages
*
* This does not include the loading message.
*
* @name Alert.hideMessages
* @function
*/
me.hideMessages = function()
{
// also possible: $('.statusmessage').addClass('hidden');
$statusMessage.addClass('hidden');
$errorMessage.addClass('hidden');
};
/**
* set a custom handler, which gets all notifications.
*
* This handler gets the following arguments:
* alertType (see array), $element, args, icon
* If it returns true, the own processing will be stopped so the message
* will not be displayed. Otherwise it will continue.
* As an aditional feature it can return q jQuery element, which will
* then be used to add the message there. Icons are not supported in
* that case and will be ignored.
* Pass 'null' to reset/delete the custom handler.
* Note that there is no notification when a message is supposed to get
* hidden.
*
* @name Alert.setCustomHandler
* @function
* @param {function|null} newHandler
*/
me.setCustomHandler = function(newHandler)
{
customHandler = newHandler;
};
/**
* init status manager
*
* preloads jQuery elements
*
* @name Alert.init
* @function
*/
me.init = function()
{
// hide "no javascript" error message
$('#noscript').hide();
// not a reset, but first set of the elements
$errorMessage = $('#errormessage');
$loadingIndicator = $('#loadingindicator');
$statusMessage = $('#status');
$remainingTime = $('#remainingtime');
currentIcon = [
'glyphicon-time', // loading icon
'glyphicon-info-sign', // status icon
'', // reserved for warning, not used yet
'glyphicon-alert' // error icon
];
};
return me;
})();
/**
* handles paste status/result
*
* @name PasteStatus
* @class
*/
var PasteStatus = (function () {
var me = {};
var $pasteSuccess,
$pasteUrl,
$remainingTime,
$shortenButton;
/**
* forward to URL shortener
*
* @name PasteStatus.sendToShortener
* @private
* @function
*/
function sendToShortener()
{
window.location.href = $shortenButton.data('shortener') +
encodeURIComponent($pasteUrl.attr('href'));
}
/**
* Forces opening the paste if the link does not do this automatically.
*
* This is necessary as browsers will not reload the page when it is
* already loaded (which is fake as it is set via history.pushState()).
*
* @name PasteStatus.pasteLinkClick
* @function
*/
function pasteLinkClick()
{
// check if location is (already) shown in URL bar
if (window.location.href === $pasteUrl.attr('href')) {
// if so we need to load link by reloading the current site
window.location.reload(true);
}
}
/**
* creates a notification after a successfull paste upload
*
* @name PasteStatus.createPasteNotification
* @function
* @param {string} url
* @param {string} deleteUrl
*/
me.createPasteNotification = function(url, deleteUrl)
{
$('#pastelink').html(
I18n._(
'Your paste is %s (Hit [Ctrl]+[c] to copy)',
url, url
)
);
// save newly created element
$pasteUrl = $('#pasteurl');
// and add click event
$pasteUrl.click(pasteLinkClick);
// shorten button
$('#deletelink').html('' + I18n._('Delete data') + '');
// show result
$pasteSuccess.removeClass('hidden');
// we pre-select the link so that the user only has to [Ctrl]+[c] the link
Helper.selectText($pasteUrl[0]);
};
/**
* shows the remaining time
*
* @name PasteStatus.showRemainingTime
* @function
* @param {object} pasteMetaData
*/
me.showRemainingTime = function(pasteMetaData)
{
if (pasteMetaData.burnafterreading) {
// display paste "for your eyes only" if it is deleted
// the paste has been deleted when the JSON with the ciphertext
// has been downloaded
Alert.showRemaining("FOR YOUR EYES ONLY. Don't close this window, this message can't be displayed again.");
$remainingTime.addClass('foryoureyesonly');
// discourage cloning (it cannot really be prevented)
TopNav.hideCloneButton();
} else if (pasteMetaData.expire_date) {
// display paste expiration
var expiration = Helper.secondsToHuman(pasteMetaData.remaining_time),
expirationLabel = [
'This document will expire in %d ' + expiration[1] + '.',
'This document will expire in %d ' + expiration[1] + 's.'
];
Alert.showRemaining([expirationLabel, expiration[0]]);
$remainingTime.removeClass('foryoureyesonly');
} else {
// never expires
return;
}
// in the end, display notification
$remainingTime.removeClass('hidden');
};
/**
* hides the remaining time and successful upload notification
*
* @name PasteStatus.hideMessages
* @function
*/
me.hideMessages = function()
{
$remainingTime.addClass('hidden');
$pasteSuccess.addClass('hidden');
};
/**
* init status manager
*
* preloads jQuery elements
*
* @name PasteStatus.init
* @function
*/
me.init = function()
{
$pasteSuccess = $('#pastesuccess');
// $pasteUrl is saved in me.createPasteNotification() after creation
$remainingTime = $('#remainingtime');
$shortenButton = $('#shortenbutton');
// bind elements
$shortenButton.click(sendToShortener);
};
return me;
})();
/**
* password prompt
*
* @name Prompt
* @class
*/
var Prompt = (function () {
var me = {};
var $passwordDecrypt,
$passwordForm,
$passwordModal;
var password = '';
/**
* submit a password in the modal dialog
*
* @name Prompt.submitPasswordModal
* @private
* @function
* @param {Event} event
*/
function submitPasswordModal(event)
{
event.preventDefault();
// get input
password = $passwordDecrypt.val();
// hide modal
$passwordModal.modal('hide');
PasteDecrypter.run();
}
/**
* ask the user for the password and set it
*
* @name Prompt.requestPassword
* @function
*/
me.requestPassword = function()
{
// show new bootstrap method (if available)
if ($passwordModal.length !== 0) {
$passwordModal.modal({
backdrop: 'static',
keyboard: false
});
return;
}
// fallback to old method for page template
password = prompt(I18n._('Please enter the password for this paste:'), '');
if (password === null) {
throw 'password prompt canceled';
}
if (password.length === 0) {
// recurse…
return me.requestPassword();
}
PasteDecrypter.run();
};
/**
* get the cached password
*
* If you do not get a password with this function
* (returns an empty string), use requestPassword.
*
* @name Prompt.getPassword
* @function
* @return {string}
*/
me.getPassword = function()
{
return password;
};
/**
* resets the password to an empty string
*
* @name Prompt.reset
* @function
*/
me.reset = function()
{
// reset internal
password = '';
// and also reset UI
$passwordDecrypt.val('');
}
/**
* init status manager
*
* preloads jQuery elements
*
* @name Prompt.init
* @function
*/
me.init = function()
{
$passwordDecrypt = $('#passworddecrypt');
$passwordForm = $('#passwordform');
$passwordModal = $('#passwordmodal');
// bind events
// focus password input when it is shown
$passwordModal.on('shown.bs.Model', function () {
$passwordDecrypt.focus();
});
// handle Model password submission
$passwordForm.submit(submitPasswordModal);
};
return me;
})();
/**
* Manage paste/message input, and preview tab
*
* Note that the actual preview is handled by PasteViewer.
*
* @name Editor
* @class
*/
var Editor = (function () {
var me = {};
var $editorTabs,
$messageEdit,
$messagePreview,
$message;
var isPreview = false;
/**
* support input of tab character
*
* @name Editor.supportTabs
* @function
* @param {Event} event
* @this $message (but not used, so it is jQuery-free, possibly faster)
*/
function supportTabs(event)
{
var keyCode = event.keyCode || event.which;
// tab was pressed
if (keyCode === 9) {
// get caret position & selection
var val = this.value,
start = this.selectionStart,
end = this.selectionEnd;
// set textarea value to: text before caret + tab + text after caret
this.value = val.substring(0, start) + '\t' + val.substring(end);
// put caret at right position again
this.selectionStart = this.selectionEnd = start + 1;
// prevent the textarea to lose focus
event.preventDefault();
}
}
/**
* view the Editor tab
*
* @name Editor.viewEditor
* @function
* @param {Event} event - optional
*/
function viewEditor(event)
{
// toggle buttons
$messageEdit.addClass('active');
$messagePreview.removeClass('active');
PasteViewer.hide();
// reshow input
$message.removeClass('hidden');
me.focusInput();
// finish
isPreview = false;
// prevent jumping of page to top
if (typeof event !== 'undefined') {
event.preventDefault();
}
}
/**
* view the preview tab
*
* @name Editor.viewPreview
* @function
* @param {Event} event
*/
function viewPreview(event)
{
// toggle buttons
$messageEdit.removeClass('active');
$messagePreview.addClass('active');
// hide input as now preview is shown
$message.addClass('hidden');
// show preview
PasteViewer.setText($message.val());
if (AttachmentViewer.hasAttachmentData()) {
var attachmentData = AttachmentViewer.getAttachmentData() || AttachmentViewer.getAttachmentLink().attr('href');
AttachmentViewer.handleAttachmentPreview(AttachmentViewer.getAttachmentPreview(), attachmentData);
}
PasteViewer.run();
// finish
isPreview = true;
// prevent jumping of page to top
if (typeof event !== 'undefined') {
event.preventDefault();
}
}
/**
* get the state of the preview
*
* @name Editor.isPreview
* @function
*/
me.isPreview = function()
{
return isPreview;
};
/**
* reset the Editor view
*
* @name Editor.resetInput
* @function
*/
me.resetInput = function()
{
// go back to input
if (isPreview) {
viewEditor();
}
// clear content
$message.val('');
};
/**
* shows the Editor
*
* @name Editor.show
* @function
*/
me.show = function()
{
$message.removeClass('hidden');
$editorTabs.removeClass('hidden');
};
/**
* hides the Editor
*
* @name Editor.reset
* @function
*/
me.hide = function()
{
$message.addClass('hidden');
$editorTabs.addClass('hidden');
};
/**
* focuses the message input
*
* @name Editor.focusInput
* @function
*/
me.focusInput = function()
{
$message.focus();
};
/**
* sets a new text
*
* @name Editor.setText
* @function
* @param {string} newText
*/
me.setText = function(newText)
{
$message.val(newText);
};
/**
* returns the current text
*
* @name Editor.getText
* @function
* @return {string}
*/
me.getText = function()
{
return $message.val();
};
/**
* init status manager
*
* preloads jQuery elements
*
* @name Editor.init
* @function
*/
me.init = function()
{
$editorTabs = $('#editorTabs');
$message = $('#message');
// bind events
$message.keydown(supportTabs);
// bind click events to tab switchers (a), but save parent of them
// (li)
$messageEdit = $('#messageedit').click(viewEditor).parent();
$messagePreview = $('#messagepreview').click(viewPreview).parent();
};
return me;
})();
/**
* (view) Parse and show paste.
*
* @name PasteViewer
* @class
*/
var PasteViewer = (function () {
var me = {};
var $placeholder,
$prettyMessage,
$prettyPrint,
$plainText;
var text,
format = 'plaintext',
isDisplayed = false,
isChanged = true; // by default true as nothing was parsed yet
/**
* apply the set format on paste and displays it
*
* @name PasteViewer.parsePaste
* @private
* @function
*/
function parsePaste()
{
// skip parsing if no text is given
if (text === '') {
return;
}
// escape HTML entities, link URLs, sanitize
var escapedLinkedText = Helper.urls2links(
Helper.htmlEntities(text)
),
sanitizedLinkedText = DOMPurify.sanitize(escapedLinkedText);
$plainText.html(sanitizedLinkedText);
$prettyPrint.html(sanitizedLinkedText);
switch (format) {
case 'markdown':
var converter = new showdown.Converter({
strikethrough: true,
tables: true,
tablesHeaderId: true,
simplifiedAutoLink: true,
excludeTrailingPunctuationFromURLs: true
});
// let showdown convert the HTML and sanitize HTML *afterwards*!
$plainText.html(
DOMPurify.sanitize(converter.makeHtml(text))
);
// add table classes from bootstrap css
$plainText.find('table').addClass('table-condensed table-bordered');
break;
case 'syntaxhighlighting':
// yes, this is really needed to initialize the environment
if (typeof prettyPrint === 'function')
{
prettyPrint();
}
$prettyPrint.html(
DOMPurify.sanitize(
prettyPrintOne(escapedLinkedText, null, true)
)
);
// fall through, as the rest is the same
default: // = 'plaintext'
$prettyPrint.css('white-space', 'pre-wrap');
$prettyPrint.css('word-break', 'normal');
$prettyPrint.removeClass('prettyprint');
}
}
/**
* displays the paste
*
* @name PasteViewer.showPaste
* @private
* @function
*/
function showPaste()
{
// instead of "nothing" better display a placeholder
if (text === '') {
$placeholder.removeClass('hidden');
return;
}
// otherwise hide the placeholder
$placeholder.addClass('hidden');
switch (format) {
case 'markdown':
$plainText.removeClass('hidden');
$prettyMessage.addClass('hidden');
break;
default:
$plainText.addClass('hidden');
$prettyMessage.removeClass('hidden');
break;
}
}
/**
* sets the format in which the text is shown
*
* @name PasteViewer.setFormat
* @function
* @param {string} newFormat the new format
*/
me.setFormat = function(newFormat)
{
// skip if there is no update
if (format === newFormat) {
return;
}
// needs to update display too, if we switch from or to Markdown
if (format === 'markdown' || newFormat === 'markdown') {
isDisplayed = false;
}
format = newFormat;
isChanged = true;
};
/**
* returns the current format
*
* @name PasteViewer.getFormat
* @function
* @return {string}
*/
me.getFormat = function()
{
return format;
};
/**
* returns whether the current view is pretty printed
*
* @name PasteViewer.isPrettyPrinted
* @function
* @return {bool}
*/
me.isPrettyPrinted = function()
{
return $prettyPrint.hasClass('prettyprinted');
};
/**
* sets the text to show
*
* @name PasteViewer.setText
* @function
* @param {string} newText the text to show
*/
me.setText = function(newText)
{
if (text !== newText) {
text = newText;
isChanged = true;
}
};
/**
* gets the current cached text
*
* @name PasteViewer.getText
* @function
* @return {string}
*/
me.getText = function()
{
return text;
};
/**
* show/update the parsed text (preview)
*
* @name PasteViewer.run
* @function
*/
me.run = function()
{
if (isChanged) {
parsePaste();
isChanged = false;
}
if (!isDisplayed) {
showPaste();
isDisplayed = true;
}
};
/**
* hide parsed text (preview)
*
* @name PasteViewer.hide
* @function
*/
me.hide = function()
{
if (!isDisplayed) {
console.warn('PasteViewer was called to hide the parsed view, but it is already hidden.');
}
$plainText.addClass('hidden');
$prettyMessage.addClass('hidden');
$placeholder.addClass('hidden');
AttachmentViewer.hideAttachmentPreview();
isDisplayed = false;
};
/**
* init status manager
*
* preloads jQuery elements
*
* @name PasteViewer.init
* @function
*/
me.init = function()
{
$placeholder = $('#placeholder');
$plainText = $('#plaintext');
$prettyMessage = $('#prettymessage');
$prettyPrint = $('#prettyprint');
// check requirements
if (typeof prettyPrintOne !== 'function') {
Alert.showError([
'The library %s is not available. This may cause display errors.',
'pretty print'
]);
}
if (typeof showdown !== 'object') {
Alert.showError([
'The library %s is not available. This may cause display errors.',
'showdown'
]);
}
// get default option from template/HTML or fall back to set value
format = Model.getFormatDefault() || format;
text = '';
isDisplayed = false;
isChanged = true;
};
return me;
})();
/**
* (view) Show attachment and preview if possible
*
* @name AttachmentViewer
* @class
*/
var AttachmentViewer = (function () {
var me = {};
var $attachmentLink;
var $attachmentPreview;
var $attachment;
var attachmentData;
var file;
var $fileInput;
var $dragAndDropFileName;
var attachmentHasPreview = false;
/**
* sets the attachment but does not yet show it
*
* @name AttachmentViewer.setAttachment
* @function
* @param {string} attachmentData - base64-encoded data of file
* @param {string} fileName - optional, file name
*/
me.setAttachment = function(attachmentData, fileName)
{
// IE does not support setting a data URI on an a element
// Convert dataURI to a Blob and use msSaveBlob to download
if (window.Blob && navigator.msSaveBlob) {
$attachmentLink.off('click').on('click', function () {
// data URI format: data:[][;base64],
// position in data URI string of where data begins
var base64Start = attachmentData.indexOf(',') + 1;
// position in data URI string of where mediaType ends
var mediaTypeEnd = attachmentData.indexOf(';');
// extract mediaType
var mediaType = attachmentData.substring(5, mediaTypeEnd);
// extract data and convert to binary
var decodedData = Base64.atob(attachmentData.substring(base64Start));
// Transform into a Blob
var decodedDataLength = decodedData.length;
var buf = new Uint8Array(decodedDataLength);
for (var i = 0; i < decodedDataLength; i++) {
buf[i] = decodedData.charCodeAt(i);
}
var blob = new window.Blob([ buf ], { type: mediaType });
navigator.msSaveBlob(blob, fileName);
});
} else {
$attachmentLink.attr('href', attachmentData);
}
if (typeof fileName !== 'undefined') {
$attachmentLink.attr('download', fileName);
}
me.handleAttachmentPreview($attachmentPreview, attachmentData);
};
/**
* displays the attachment
*
* @name AttachmentViewer.showAttachment
* @function
*/
me.showAttachment = function()
{
$attachment.removeClass('hidden');
if (attachmentHasPreview) {
$attachmentPreview.removeClass('hidden');
}
};
/**
* removes the attachment
*
* This automatically hides the attachment containers too, to
* prevent an inconsistent display.
*
* @name AttachmentViewer.removeAttachment
* @function
*/
me.removeAttachment = function()
{
if (!$attachment.length) {
return;
}
me.hideAttachment();
me.hideAttachmentPreview();
$attachmentLink.removeAttr('href');
$attachmentLink.removeAttr('download');
$attachmentLink.off('click');
$attachmentPreview.html('');
AttachmentViewer.removeAttachmentData();
};
/**
* removes the attachment data
*
* This removes the data, which would be uploaded otherwise.
*
* @name AttachmentViewer.removeAttachmentData
* @function
*/
me.removeAttachmentData = function()
{
file = undefined;
attachmentData = undefined;
};
/**
* Cleares the drag & drop data.
*
* @name AttachmentViewer.clearDragAndDrop
* @function
*/
me.clearDragAndDrop = function()
{
$dragAndDropFileName.text('');
};
/**
* hides the attachment
*
* This will not hide the preview (see AttachmentViewer.hideAttachmentPreview
* for that) nor will it hide the attachment link if it was moved somewhere
* else (see AttachmentViewer.moveAttachmentTo).
*
* @name AttachmentViewer.hideAttachment
* @function
*/
me.hideAttachment = function()
{
$attachment.addClass('hidden');
};
/**
* hides the attachment preview
*
* @name AttachmentViewer.hideAttachmentPreview
* @function
*/
me.hideAttachmentPreview = function()
{
if ($attachmentPreview) {
$attachmentPreview.addClass('hidden');
}
};
/**
* checks if there is an attachment displayed
*
* @name AttachmentViewer.hasAttachment
* @function
*/
me.hasAttachment = function()
{
if (!$attachment.length) {
return false;
}
var link = $attachmentLink.prop('href');
return (typeof link !== 'undefined' && link !== '');
};
/**
* checks if there is attachment data (for preview!) available
*
* It returns true, when there is data that needs to be encrypted.
*
* @name AttachmentViewer.hasAttachmentData
* @function
*/
me.hasAttachmentData = function()
{
if ($attachment.length) {
return true;
}
return false;
};
/**
* return the attachment
*
* @name AttachmentViewer.getAttachment
* @function
* @returns {array}
*/
me.getAttachment = function()
{
return [
$attachmentLink.prop('href'),
$attachmentLink.prop('download')
];
};
/**
* moves the attachment link to another element
*
* It is advisable to hide the attachment afterwards (AttachmentViewer.hideAttachment)
*
* @name AttachmentViewer.moveAttachmentTo
* @function
* @param {jQuery} $element - the wrapper/container element where this should be moved to
* @param {string} label - the text to show (%s will be replaced with the file name), will automatically be translated
*/
me.moveAttachmentTo = function($element, label)
{
// move elemement to new place
$attachmentLink.appendTo($element);
// update text
I18n._($attachmentLink, label, $attachmentLink.attr('download'));
};
/**
* read file data as data URL using the FileReader API
*
* @name AttachmentViewer.readFileData
* @private
* @function
* @param {object} loadedFile (optional) loaded file object
* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/FileReader#readAsDataURL()}
*/
function readFileData(loadedFile) {
if (typeof FileReader === 'undefined') {
// revert loading status…
me.hideAttachment();
me.hideAttachmentPreview();
Alert.showError('Your browser does not support uploading encrypted files. Please use a newer browser.');
return;
}
var fileReader = new FileReader();
if (loadedFile === undefined) {
loadedFile = $fileInput[0].files[0];
$dragAndDropFileName.text('');
} else {
$dragAndDropFileName.text(loadedFile.name);
}
file = loadedFile;
fileReader.onload = function (event) {
var dataURL = event.target.result;
attachmentData = dataURL;
if (Editor.isPreview()) {
me.handleAttachmentPreview($attachmentPreview, dataURL);
$attachmentPreview.removeClass('hidden');
}
};
fileReader.readAsDataURL(loadedFile);
}
/**
* handle the preview of files that can either be an image, video, audio or pdf element
*
* @name AttachmentViewer.handleAttachmentPreview
* @function
* @argument {jQuery} $targetElement element where the preview should be appended
* @argument {string} file as a data URL
*/
me.handleAttachmentPreview = function ($targetElement, data) {
if (data) {
// source: https://developer.mozilla.org/en-US/docs/Web/API/FileReader#readAsDataURL()
var mimeType = data.slice(
data.indexOf('data:') + 5,
data.indexOf(';base64,')
);
attachmentHasPreview = true;
if (mimeType.match(/image\//i)) {
$targetElement.html(
$(document.createElement('img'))
.attr('src', data)
.attr('class', 'img-thumbnail')
);
} else if (mimeType.match(/video\//i)) {
$targetElement.html(
$(document.createElement('video'))
.attr('controls', 'true')
.attr('autoplay', 'true')
.attr('class', 'img-thumbnail')
.append($(document.createElement('source'))
.attr('type', mimeType)
.attr('src', data))
);
} else if (mimeType.match(/audio\//i)) {
$targetElement.html(
$(document.createElement('audio'))
.attr('controls', 'true')
.attr('autoplay', 'true')
.append($(document.createElement('source'))
.attr('type', mimeType)
.attr('src', data))
);
} else if (mimeType.match(/\/pdf/i)) {
// PDFs are only displayed if the filesize is smaller than about 1MB (after base64 encoding).
// Bigger filesizes currently cause crashes in various browsers.
// See also: https://code.google.com/p/chromium/issues/detail?id=69227
// Firefox crashes with files that are about 1.5MB
// The performance with 1MB files is bearable
if (data.length > 1398488) {
Alert.showError('File too large, to display a preview. Please download the attachment.'); //TODO: is this error really neccessary?
return;
}
// Fallback for browsers, that don't support the vh unit
var clientHeight = $(window).height();
$targetElement.html(
$(document.createElement('embed'))
.attr('src', data)
.attr('type', 'application/pdf')
.attr('class', 'pdfPreview')
.css('height', clientHeight)
);
} else {
attachmentHasPreview = false;
}
}
};
/**
* attaches the file attachment drag & drop handler to the page
*
* @name AttachmentViewer.addDragDropHandler
* @private
* @function
*/
function addDragDropHandler() {
if (typeof $fileInput === 'undefined' || $fileInput.length === 0) {
return;
}
var ignoreDragDrop = function(event) {
event.stopPropagation();
event.preventDefault();
};
var drop = function(event) {
var evt = event.originalEvent;
evt.stopPropagation();
evt.preventDefault();
if ($fileInput) {
var file = evt.dataTransfer.files[0];
//Clear the file input:
$fileInput.wrap('