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Add code comments to vnc_lite

This commit is contained in:
Samuel Mannehed 2018-08-15 09:43:24 +02:00
parent 27dff4a0a2
commit 8c2866df36
1 changed files with 38 additions and 8 deletions
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46
vnc_lite.html
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@ -4,6 +4,9 @@
<!--
noVNC example: lightweight example using minimal UI and features
This is a self-contained file which doesn't import WebUtil or external CSS.
Copyright (C) 2012 Joel Martin
Copyright (C) 2018 Samuel Mannehed for Cendio AB
noVNC is licensed under the MPL 2.0 (see LICENSE.txt)
@ -61,8 +64,9 @@
</style>
<!-- promise polyfills promises for IE11 -->
<!-- Promise polyfill for IE11 -->
<script src="vendor/promise.js"></script>
<!-- ES2015/ES6 modules polyfill -->
<script type="module">
window._noVNC_has_module_support = true;
@ -78,44 +82,62 @@
<!-- actual script modules -->
<script type="module" crossorigin="anonymous">
// Load supporting scripts
// WebUtil contains helper functions for browser features
import * as WebUtil from './app/webutil.js';
// RFB holds the API to connect and communicate with a VNC server
import RFB from './core/rfb.js';
var rfb;
var desktopName;
// When this function is called we have received
// a desktop name from the server
function updateDesktopName(e) {
desktopName = e.detail.name;
}
// When this function is called, the server requires
// credentials to authenticate
function credentials(e) {
// Let's create a password input
var form = document.createElement('form');
form.innerHTML = '<label></label>';
form.innerHTML += '<input type=password size=10 id="password_input">';
form.onsubmit = setPassword;
// bypass status() because it sets text content
// Bypass status() because it sets text content
// which doesn't allow adding elements
document.getElementById('noVNC_status').innerHTML = '';
document.getElementById('noVNC_status').appendChild(form);
document.getElementById('noVNC_status').querySelector('label').textContent = 'Password Required: ';
}
// Send the credentials from the input element
function setPassword() {
rfb.sendCredentials({ password: document.getElementById('password_input').value });
return false;
}
// Since most operating systems will catch Ctrl+Alt+Del
// before they get a chance to be intercepted by the browser,
// we provide a way to emulate this key sequence.
function sendCtrlAltDel() {
rfb.sendCtrlAltDel();
return false;
}
// Show a status text in the top bar
function status(text) {
document.getElementById('noVNC_status').textContent = text;
}
// When this function is called we have
// successfully connected to a server
function connected(e) {
document.getElementById('sendCtrlAltDelButton').disabled = false;
status("Connected to " + desktopName);
}
// This function is called when we are disconnected
function disconnected(e) {
document.getElementById('sendCtrlAltDelButton').disabled = true;
if (e.detail.clean) {
@ -127,14 +149,15 @@
document.getElementById('sendCtrlAltDelButton').onclick = sendCtrlAltDel;
// Read parameters specified in the URL (query string or fragment)
WebUtil.init_logging(WebUtil.getConfigVar('logging', 'warn'));
document.title = WebUtil.getConfigVar('title', 'noVNC');
// By default, use the host and port of server that served this file
var host = WebUtil.getConfigVar('host', window.location.hostname);
var port = WebUtil.getConfigVar('port', window.location.port);
// if port == 80 (or 443) then it won't be present and should be
// set manually
// if port == 80 (or 443) then it won't be present in window.location
// and we have to set it manually
if (!port) {
if (window.location.protocol.substring(0,5) == 'https') {
port = 443;
@ -157,34 +180,41 @@
WebUtil.createCookie('token', token, 1)
}
// | | | | | |
// | | | Connect | | |
// v v v v v v
(function() {
status("Connecting");
// Build the websocket URL used to connect
var url;
if (WebUtil.getConfigVar('encrypt',
(window.location.protocol === "https:"))) {
url = 'wss';
} else {
url = 'ws';
}
url += '://' + host;
if(port) {
url += ':' + port;
}
url += '/' + path;
// Creating a new RFB object will start a new connection
rfb = new RFB(document.body, url,
{ repeaterID: WebUtil.getConfigVar('repeaterID', ''),
shared: WebUtil.getConfigVar('shared', true),
credentials: { password: password } });
rfb.viewOnly = WebUtil.getConfigVar('view_only', false);
// Add listeners to important events from the RFB module
rfb.addEventListener("connect", connected);
rfb.addEventListener("disconnect", disconnected);
rfb.addEventListener("credentialsrequired", credentials);
rfb.addEventListener("desktopname", updateDesktopName);
// Set parameters that can be changed on an active connection
rfb.viewOnly = WebUtil.getConfigVar('view_only', false);
rfb.scaleViewport = WebUtil.getConfigVar('scale', false);
rfb.resizeSession = WebUtil.getConfigVar('resize', false);
})();