Se añade botón consola para lanzar noVNC

app/main.py

@@ -5,11 +5,20 @@ import os
 import libvirt
 import subprocess
 import random
+import xml.etree.ElementTree as ET
+import socket
 
 app = FastAPI(title="VirtManager API", description="API for managing virtual machines")
 
 app.mount("/static", StaticFiles(directory="static"), name="static")
 
+ws_processes = {}
+
+def get_free_port():
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+        s.bind(('', 0))
+        return s.getsockname()[1]
+
 def get_state_string(state_code):
     states = {
         0: "no state",
@@ -35,10 +44,19 @@ async def list_vms():
     domains = conn.listAllDomains()
     vms = []
     for domain in domains:
+        xml_desc = domain.XMLDesc()
+        root = ET.fromstring(xml_desc)
+        graphics = root.find(".//graphics[@type='vnc']")
+        vnc_port = None
+        if graphics is not None:
+            port_str = graphics.get('port')
+            if port_str and port_str != '-1':
+                vnc_port = int(port_str)
         vms.append({
             "id": domain.ID(),
             "name": domain.name(),
-            "state": get_state_string(domain.state()[0])
+            "state": get_state_string(domain.state()[0]),
+            "vnc_port": vnc_port
         })
     return {"vms": vms}
 
@@ -151,6 +169,30 @@ async def create_vm(name: str, memory: int, disk_size: int, iso: str):
     except Exception as e:
         return {"error": str(e)}
 
+@app.get("/console/{vm_name}")
+async def get_console(vm_name: str):
+    try:
+        domain = conn.lookupByName(vm_name)
+        xml_desc = domain.XMLDesc()
+        root = ET.fromstring(xml_desc)
+        graphics = root.find(".//graphics[@type='vnc']")
+        if graphics is None:
+            return {"error": "No VNC graphics found"}
+        vnc_port = graphics.get('port')
+        if not vnc_port or vnc_port == '-1':
+            return {"error": "VNC port not assigned"}
+        vnc_port = int(vnc_port)
+        
+        if vm_name not in ws_processes:
+            ws_port = get_free_port()
+            proc = subprocess.Popen(['websockify', str(ws_port), f'localhost:{vnc_port}'])
+            ws_processes[vm_name] = (proc, ws_port)
+        
+        _, ws_port = ws_processes[vm_name]
+        return {"url": f"/static/novnc/vnc.html?host={socket.gethostname()}&port={ws_port}"}
+    except Exception as e:
+        return {"error": str(e)}
+
 @app.delete("/vms/{vm_name}")
 async def delete_vm(vm_name: str):
     try:
@@ -158,6 +200,12 @@ async def delete_vm(vm_name: str):
         if domain.isActive():
             domain.destroy()
         domain.undefine()
+        # Kill websockify process if exists
+        if vm_name in ws_processes:
+            proc, _ = ws_processes[vm_name]
+            proc.terminate()
+            proc.wait()
+            del ws_processes[vm_name]
         return {"message": f"VM {vm_name} deleted"}
     except Exception as e:
         return {"error": str(e)}

static/app.js

@@ -14,9 +14,10 @@ async function loadVMs() {
                 <td>${vm.name}</td>
                 <td>${vm.state}</td>
                 <td>
-                    <button class="btn btn-sm btn-success" onclick="startVM(${vm.id})">Start</button>
+                    <button class="btn btn-sm btn-success" onclick="startVM(${vm.id})">Lanzar</button>
                     <button class="btn btn-sm btn-warning" onclick="stopVM(${vm.id})">Stop</button>
                     <button class="btn btn-sm btn-danger" onclick="deleteVM('${vm.name}')">Delete</button>
+                    ${vm.vnc_port ? `<button class="btn btn-sm btn-info" onclick="openVNC('${vm.name}')">Console</button>` : ''}
                 </td>
             `;
             tbody.appendChild(row);
@@ -59,6 +60,22 @@ async function deleteVM(name) {
     }
 }
 
+function openVNC(vm_name) {
+    fetch(`${API_BASE}/console/${vm_name}`)
+        .then(response => response.json())
+        .then(data => {
+            if (data.url) {
+                window.open(data.url);
+            } else {
+                alert(data.error || 'Error opening console');
+            }
+        })
+        .catch(error => {
+            console.error('Error:', error);
+            alert('Error opening console');
+        });
+}
+
 document.getElementById('createVMForm').addEventListener('submit', async (e) => {
     e.preventDefault();
     const name = document.getElementById('name').value;

static/novnc/app/error-handler.js

@@ -0,0 +1,66 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+// NB: this should *not* be included as a module until we have
+// native support in the browsers, so that our error handler
+// can catch script-loading errors.
+
+// No ES6 can be used in this file since it's used for the translation
+/* eslint-disable prefer-arrow-callback */
+
+(function _scope() {
+    "use strict";
+
+    // Fallback for all uncought errors
+    function handleError(event, err) {
+        try {
+            const msg = document.getElementById('noVNC_fallback_errormsg');
+
+            // Only show the initial error
+            if (msg.hasChildNodes()) {
+                return false;
+            }
+
+            let div = document.createElement("div");
+            div.classList.add('noVNC_message');
+            div.appendChild(document.createTextNode(event.message));
+            msg.appendChild(div);
+
+            if (event.filename) {
+                div = document.createElement("div");
+                div.className = 'noVNC_location';
+                let text = event.filename;
+                if (event.lineno !== undefined) {
+                    text += ":" + event.lineno;
+                    if (event.colno !== undefined) {
+                        text += ":" + event.colno;
+                    }
+                }
+                div.appendChild(document.createTextNode(text));
+                msg.appendChild(div);
+            }
+
+            if (err && err.stack) {
+                div = document.createElement("div");
+                div.className = 'noVNC_stack';
+                div.appendChild(document.createTextNode(err.stack));
+                msg.appendChild(div);
+            }
+
+            document.getElementById('noVNC_fallback_error')
+                .classList.add("noVNC_open");
+        } catch (exc) {
+            document.write("noVNC encountered an error.");
+        }
+        // Don't return true since this would prevent the error
+        // from being printed to the browser console.
+        return false;
+    }
+    window.addEventListener('error', function onerror(evt) { handleError(evt, evt.error); });
+    window.addEventListener('unhandledrejection', function onreject(evt) { handleError(evt.reason, evt.reason); });
+})();

static/novnc/app/images/alt.svg

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static/novnc/app/images/clipboard.svg

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static/novnc/app/images/connect.svg

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static/novnc/app/images/ctrl.svg

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static/novnc/app/images/fullscreen.svg

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static/novnc/app/images/handle.svg

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static/novnc/app/images/icons/Makefile

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+ICONS := \
+	novnc-16x16.png \
+	novnc-24x24.png \
+	novnc-32x32.png \
+	novnc-48x48.png \
+	novnc-64x64.png
+
+ANDROID_LAUNCHER := \
+	novnc-48x48.png \
+	novnc-72x72.png \
+	novnc-96x96.png \
+	novnc-144x144.png \
+	novnc-192x192.png
+
+IPHONE_LAUNCHER := \
+	novnc-60x60.png \
+	novnc-120x120.png
+
+IPAD_LAUNCHER := \
+	novnc-76x76.png \
+	novnc-152x152.png
+
+ALL_ICONS := $(ICONS) $(ANDROID_LAUNCHER) $(IPHONE_LAUNCHER) $(IPAD_LAUNCHER)
+
+all: $(ALL_ICONS)
+
+novnc-16x16.png: novnc-icon-sm.svg
+	convert -density 90 \
+		-background transparent "$<" "$@"
+novnc-24x24.png: novnc-icon-sm.svg
+	convert -density 135 \
+		-background transparent "$<" "$@"
+novnc-32x32.png: novnc-icon-sm.svg
+	convert -density 180 \
+		-background transparent "$<" "$@"
+
+novnc-%.png: novnc-icon.svg
+	convert -density $$[`echo $* | cut -d x -f 1` * 90 / 48] \
+		-background transparent "$<" "$@"
+
+clean:
+	rm -f *.png

static/novnc/app/images/icons/novnc-icon-sm.svg

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+<svg
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+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
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+         rdf:about="">
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static/novnc/app/images/icons/novnc-icon.svg

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+
+<svg
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+   xmlns:svg="http://www.w3.org/2000/svg"
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static/novnc/app/images/warning.svg

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static/novnc/app/images/windows.svg

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static/novnc/app/locale/README

@@ -0,0 +1 @@
+DO NOT MODIFY THE FILES IN THIS FOLDER, THEY ARE AUTOMATICALLY GENERATED FROM THE PO-FILES.

static/novnc/app/locale/cs.json

@@ -0,0 +1,71 @@
+{
+    "Connecting...": "Připojení...",
+    "Disconnecting...": "Odpojení...",
+    "Reconnecting...": "Obnova připojení...",
+    "Internal error": "Vnitřní chyba",
+    "Must set host": "Hostitel musí být nastavení",
+    "Connected (encrypted) to ": "Připojení (šifrované) k ",
+    "Connected (unencrypted) to ": "Připojení (nešifrované) k ",
+    "Something went wrong, connection is closed": "Něco se pokazilo, odpojeno",
+    "Failed to connect to server": "Chyba připojení k serveru",
+    "Disconnected": "Odpojeno",
+    "New connection has been rejected with reason: ": "Nové připojení bylo odmítnuto s odůvodněním: ",
+    "New connection has been rejected": "Nové připojení bylo odmítnuto",
+    "Password is required": "Je vyžadováno heslo",
+    "noVNC encountered an error:": "noVNC narazilo na chybu:",
+    "Hide/Show the control bar": "Skrýt/zobrazit ovládací panel",
+    "Move/Drag Viewport": "Přesunout/přetáhnout výřez",
+    "viewport drag": "přesun výřezu",
+    "Active Mouse Button": "Aktivní tlačítka myši",
+    "No mousebutton": "Žádné",
+    "Left mousebutton": "Levé tlačítko myši",
+    "Middle mousebutton": "Prostřední tlačítko myši",
+    "Right mousebutton": "Pravé tlačítko myši",
+    "Keyboard": "Klávesnice",
+    "Show Keyboard": "Zobrazit klávesnici",
+    "Extra keys": "Extra klávesy",
+    "Show Extra Keys": "Zobrazit extra klávesy",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "Přepnout Ctrl",
+    "Alt": "Alt",
+    "Toggle Alt": "Přepnout Alt",
+    "Send Tab": "Odeslat tabulátor",
+    "Tab": "Tab",
+    "Esc": "Esc",
+    "Send Escape": "Odeslat Esc",
+    "Ctrl+Alt+Del": "Ctrl+Alt+Del",
+    "Send Ctrl-Alt-Del": "Poslat Ctrl-Alt-Del",
+    "Shutdown/Reboot": "Vypnutí/Restart",
+    "Shutdown/Reboot...": "Vypnutí/Restart...",
+    "Power": "Napájení",
+    "Shutdown": "Vypnout",
+    "Reboot": "Restart",
+    "Reset": "Reset",
+    "Clipboard": "Schránka",
+    "Clear": "Vymazat",
+    "Fullscreen": "Celá obrazovka",
+    "Settings": "Nastavení",
+    "Shared Mode": "Sdílený režim",
+    "View Only": "Pouze prohlížení",
+    "Clip to Window": "Přizpůsobit oknu",
+    "Scaling Mode:": "Přizpůsobení velikosti",
+    "None": "Žádné",
+    "Local Scaling": "Místní",
+    "Remote Resizing": "Vzdálené",
+    "Advanced": "Pokročilé",
+    "Repeater ID:": "ID opakovače",
+    "WebSocket": "WebSocket",
+    "Encrypt": "Šifrování:",
+    "Host:": "Hostitel:",
+    "Port:": "Port:",
+    "Path:": "Cesta",
+    "Automatic Reconnect": "Automatická obnova připojení",
+    "Reconnect Delay (ms):": "Zpoždění připojení (ms)",
+    "Show Dot when No Cursor": "Tečka místo chybějícího kurzoru myši",
+    "Logging:": "Logování:",
+    "Disconnect": "Odpojit",
+    "Connect": "Připojit",
+    "Password:": "Heslo",
+    "Send Password": "Odeslat heslo",
+    "Cancel": "Zrušit"
+}

static/novnc/app/locale/de.json

@@ -0,0 +1,69 @@
+{
+    "Connecting...": "Verbinden...",
+    "Disconnecting...": "Verbindung trennen...",
+    "Reconnecting...": "Verbindung wiederherstellen...",
+    "Internal error": "Interner Fehler",
+    "Must set host": "Richten Sie den Server ein",
+    "Connected (encrypted) to ": "Verbunden mit (verschlüsselt) ",
+    "Connected (unencrypted) to ": "Verbunden mit (unverschlüsselt) ",
+    "Something went wrong, connection is closed": "Etwas lief schief, Verbindung wurde getrennt",
+    "Disconnected": "Verbindung zum Server getrennt",
+    "New connection has been rejected with reason: ": "Verbindung wurde aus folgendem Grund abgelehnt: ",
+    "New connection has been rejected": "Verbindung wurde abgelehnt",
+    "Password is required": "Passwort ist erforderlich",
+    "noVNC encountered an error:": "Ein Fehler ist aufgetreten:",
+    "Hide/Show the control bar": "Kontrollleiste verstecken/anzeigen",
+    "Move/Drag Viewport": "Ansichtsfenster verschieben/ziehen",
+    "viewport drag": "Ansichtsfenster ziehen",
+    "Active Mouse Button": "Aktive Maustaste",
+    "No mousebutton": "Keine Maustaste",
+    "Left mousebutton": "Linke Maustaste",
+    "Middle mousebutton": "Mittlere Maustaste",
+    "Right mousebutton": "Rechte Maustaste",
+    "Keyboard": "Tastatur",
+    "Show Keyboard": "Tastatur anzeigen",
+    "Extra keys": "Zusatztasten",
+    "Show Extra Keys": "Zusatztasten anzeigen",
+    "Ctrl": "Strg",
+    "Toggle Ctrl": "Strg umschalten",
+    "Alt": "Alt",
+    "Toggle Alt": "Alt umschalten",
+    "Send Tab": "Tab senden",
+    "Tab": "Tab",
+    "Esc": "Esc",
+    "Send Escape": "Escape senden",
+    "Ctrl+Alt+Del": "Strg+Alt+Entf",
+    "Send Ctrl-Alt-Del": "Strg+Alt+Entf senden",
+    "Shutdown/Reboot": "Herunterfahren/Neustarten",
+    "Shutdown/Reboot...": "Herunterfahren/Neustarten...",
+    "Power": "Energie",
+    "Shutdown": "Herunterfahren",
+    "Reboot": "Neustarten",
+    "Reset": "Zurücksetzen",
+    "Clipboard": "Zwischenablage",
+    "Clear": "Löschen",
+    "Fullscreen": "Vollbild",
+    "Settings": "Einstellungen",
+    "Shared Mode": "Geteilter Modus",
+    "View Only": "Nur betrachten",
+    "Clip to Window": "Auf Fenster begrenzen",
+    "Scaling Mode:": "Skalierungsmodus:",
+    "None": "Keiner",
+    "Local Scaling": "Lokales skalieren",
+    "Remote Resizing": "Serverseitiges skalieren",
+    "Advanced": "Erweitert",
+    "Repeater ID:": "Repeater ID:",
+    "WebSocket": "WebSocket",
+    "Encrypt": "Verschlüsselt",
+    "Host:": "Server:",
+    "Port:": "Port:",
+    "Path:": "Pfad:",
+    "Automatic Reconnect": "Automatisch wiederverbinden",
+    "Reconnect Delay (ms):": "Wiederverbindungsverzögerung (ms):",
+    "Logging:": "Protokollierung:",
+    "Disconnect": "Verbindung trennen",
+    "Connect": "Verbinden",
+    "Password:": "Passwort:",
+    "Cancel": "Abbrechen",
+    "Canvas not supported.": "Canvas nicht unterstützt."
+}

static/novnc/app/locale/el.json

@@ -0,0 +1,69 @@
+{
+    "Connecting...": "Συνδέεται...",
+    "Disconnecting...": "Aποσυνδέεται...",
+    "Reconnecting...": "Επανασυνδέεται...",
+    "Internal error": "Εσωτερικό σφάλμα",
+    "Must set host": "Πρέπει να οριστεί ο διακομιστής",
+    "Connected (encrypted) to ": "Συνδέθηκε (κρυπτογραφημένα) με το ",
+    "Connected (unencrypted) to ": "Συνδέθηκε (μη κρυπτογραφημένα) με το ",
+    "Something went wrong, connection is closed": "Κάτι πήγε στραβά, η σύνδεση διακόπηκε",
+    "Disconnected": "Αποσυνδέθηκε",
+    "New connection has been rejected with reason: ": "Η νέα σύνδεση απορρίφθηκε διότι: ",
+    "New connection has been rejected": "Η νέα σύνδεση απορρίφθηκε ",
+    "Password is required": "Απαιτείται ο κωδικός πρόσβασης",
+    "noVNC encountered an error:": "το noVNC αντιμετώπισε ένα σφάλμα:",
+    "Hide/Show the control bar": "Απόκρυψη/Εμφάνιση γραμμής ελέγχου",
+    "Move/Drag Viewport": "Μετακίνηση/Σύρσιμο Θεατού πεδίου",
+    "viewport drag": "σύρσιμο θεατού πεδίου",
+    "Active Mouse Button": "Ενεργό Πλήκτρο Ποντικιού",
+    "No mousebutton": "Χωρίς Πλήκτρο Ποντικιού",
+    "Left mousebutton": "Αριστερό Πλήκτρο Ποντικιού",
+    "Middle mousebutton": "Μεσαίο Πλήκτρο Ποντικιού",
+    "Right mousebutton": "Δεξί Πλήκτρο Ποντικιού",
+    "Keyboard": "Πληκτρολόγιο",
+    "Show Keyboard": "Εμφάνιση Πληκτρολογίου",
+    "Extra keys": "Επιπλέον πλήκτρα",
+    "Show Extra Keys": "Εμφάνιση Επιπλέον Πλήκτρων",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "Εναλλαγή Ctrl",
+    "Alt": "Alt",
+    "Toggle Alt": "Εναλλαγή Alt",
+    "Send Tab": "Αποστολή Tab",
+    "Tab": "Tab",
+    "Esc": "Esc",
+    "Send Escape": "Αποστολή Escape",
+    "Ctrl+Alt+Del": "Ctrl+Alt+Del",
+    "Send Ctrl-Alt-Del": "Αποστολή Ctrl-Alt-Del",
+    "Shutdown/Reboot": "Κλείσιμο/Επανεκκίνηση",
+    "Shutdown/Reboot...": "Κλείσιμο/Επανεκκίνηση...",
+    "Power": "Απενεργοποίηση",
+    "Shutdown": "Κλείσιμο",
+    "Reboot": "Επανεκκίνηση",
+    "Reset": "Επαναφορά",
+    "Clipboard": "Πρόχειρο",
+    "Clear": "Καθάρισμα",
+    "Fullscreen": "Πλήρης Οθόνη",
+    "Settings": "Ρυθμίσεις",
+    "Shared Mode": "Κοινόχρηστη Λειτουργία",
+    "View Only": "Μόνο Θέαση",
+    "Clip to Window": "Αποκοπή στο όριο του Παράθυρου",
+    "Scaling Mode:": "Λειτουργία Κλιμάκωσης:",
+    "None": "Καμία",
+    "Local Scaling": "Τοπική Κλιμάκωση",
+    "Remote Resizing": "Απομακρυσμένη Αλλαγή μεγέθους",
+    "Advanced": "Για προχωρημένους",
+    "Repeater ID:": "Repeater ID:",
+    "WebSocket": "WebSocket",
+    "Encrypt": "Κρυπτογράφηση",
+    "Host:": "Όνομα διακομιστή:",
+    "Port:": "Πόρτα διακομιστή:",
+    "Path:": "Διαδρομή:",
+    "Automatic Reconnect": "Αυτόματη επανασύνδεση",
+    "Reconnect Delay (ms):": "Καθυστέρηση επανασύνδεσης (ms):",
+    "Logging:": "Καταγραφή:",
+    "Disconnect": "Αποσύνδεση",
+    "Connect": "Σύνδεση",
+    "Password:": "Κωδικός Πρόσβασης:",
+    "Cancel": "Ακύρωση",
+    "Canvas not supported.": "Δεν υποστηρίζεται το στοιχείο Canvas"
+}

static/novnc/app/locale/es.json

@@ -0,0 +1,68 @@
+{
+    "Connecting...": "Conectando...",
+    "Connected (encrypted) to ": "Conectado (con encriptación) a",
+    "Connected (unencrypted) to ": "Conectado (sin encriptación) a",
+    "Disconnecting...": "Desconectando...",
+    "Disconnected": "Desconectado",
+    "Must set host": "Se debe configurar el host",
+    "Reconnecting...": "Reconectando...",
+    "Password is required": "La contraseña es obligatoria",
+    "Disconnect timeout": "Tiempo de desconexión agotado",
+    "noVNC encountered an error:": "noVNC ha encontrado un error:",
+    "Hide/Show the control bar": "Ocultar/Mostrar la barra de control",
+    "Move/Drag Viewport": "Mover/Arrastrar la ventana",
+    "viewport drag": "Arrastrar la ventana",
+    "Active Mouse Button": "Botón activo del ratón",
+    "No mousebutton": "Ningún botón del ratón",
+    "Left mousebutton": "Botón izquierdo del ratón",
+    "Middle mousebutton": "Botón central del ratón",
+    "Right mousebutton": "Botón derecho del ratón",
+    "Keyboard": "Teclado",
+    "Show Keyboard": "Mostrar teclado",
+    "Extra keys": "Teclas adicionales",
+    "Show Extra Keys": "Mostrar Teclas Adicionales",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "Pulsar/Soltar Ctrl",
+    "Alt": "Alt",
+    "Toggle Alt": "Pulsar/Soltar Alt",
+    "Send Tab": "Enviar Tabulación",
+    "Tab": "Tabulación",
+    "Esc": "Esc",
+    "Send Escape": "Enviar Escape",
+    "Ctrl+Alt+Del": "Ctrl+Alt+Del",
+    "Send Ctrl-Alt-Del": "Enviar Ctrl+Alt+Del",
+    "Shutdown/Reboot": "Apagar/Reiniciar",
+    "Shutdown/Reboot...": "Apagar/Reiniciar...",
+    "Power": "Encender",
+    "Shutdown": "Apagar",
+    "Reboot": "Reiniciar",
+    "Reset": "Restablecer",
+    "Clipboard": "Portapapeles",
+    "Clear": "Vaciar",
+    "Fullscreen": "Pantalla Completa",
+    "Settings": "Configuraciones",
+    "Encrypt": "Encriptar",
+    "Shared Mode": "Modo Compartido",
+    "View Only": "Solo visualización",
+    "Clip to Window": "Recortar al tamaño de la ventana",
+    "Scaling Mode:": "Modo de escalado:",
+    "None": "Ninguno",
+    "Local Scaling": "Escalado Local",
+    "Local Downscaling": "Reducción de escala local",
+    "Remote Resizing": "Cambio de tamaño remoto",
+    "Advanced": "Avanzado",
+    "Local Cursor": "Cursor Local",
+    "Repeater ID:": "ID del Repetidor:",
+    "WebSocket": "WebSocket",
+    "Host:": "Host:",
+    "Port:": "Puerto:",
+    "Path:": "Ruta:",
+    "Automatic Reconnect": "Reconexión automática",
+    "Reconnect Delay (ms):": "Retraso en la reconexión (ms):",
+    "Logging:": "Registrando:",
+    "Disconnect": "Desconectar",
+    "Connect": "Conectar",
+    "Password:": "Contraseña:",
+    "Cancel": "Cancelar",
+    "Canvas not supported.": "Canvas no soportado."
+}

static/novnc/app/locale/fr.json

@@ -0,0 +1,72 @@
+{
+    "Connecting...": "En cours de connexion...",
+    "Disconnecting...": "Déconnexion en cours...",
+    "Reconnecting...": "Reconnexion en cours...",
+    "Internal error": "Erreur interne",
+    "Must set host": "Doit définir l'hôte",
+    "Connected (encrypted) to ": "Connecté (crypté) à ",
+    "Connected (unencrypted) to ": "Connecté (non crypté) à ",
+    "Something went wrong, connection is closed": "Quelque chose est arrivé, la connexion est fermée",
+    "Failed to connect to server": "Échec de connexion au serveur",
+    "Disconnected": "Déconnecté",
+    "New connection has been rejected with reason: ": "Une nouvelle connexion a été rejetée avec raison: ",
+    "New connection has been rejected": "Une nouvelle connexion a été rejetée",
+    "Credentials are required": "Les identifiants sont requis",
+    "noVNC encountered an error:": "noVNC a rencontré une erreur:",
+    "Hide/Show the control bar": "Masquer/Afficher la barre de contrôle",
+    "Drag": "Faire glisser",
+    "Move/Drag Viewport": "Déplacer/faire glisser Viewport",
+    "Keyboard": "Clavier",
+    "Show Keyboard": "Afficher le clavier",
+    "Extra keys": "Touches supplémentaires",
+    "Show Extra Keys": "Afficher les touches supplémentaires",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "Basculer Ctrl",
+    "Alt": "Alt",
+    "Toggle Alt": "Basculer Alt",
+    "Toggle Windows": "Basculer Windows",
+    "Windows": "Windows",
+    "Send Tab": "Envoyer l'onglet",
+    "Tab": "l'onglet",
+    "Esc": "Esc",
+    "Send Escape": "Envoyer Escape",
+    "Ctrl+Alt+Del": "Ctrl+Alt+Del",
+    "Send Ctrl-Alt-Del": "Envoyer Ctrl-Alt-Del",
+    "Shutdown/Reboot": "Arrêter/Redémarrer",
+    "Shutdown/Reboot...": "Arrêter/Redémarrer...",
+    "Power": "Alimentation",
+    "Shutdown": "Arrêter",
+    "Reboot": "Redémarrer",
+    "Reset": "Réinitialiser",
+    "Clipboard": "Presse-papiers",
+    "Clear": "Effacer",
+    "Fullscreen": "Plein écran",
+    "Settings": "Paramètres",
+    "Shared Mode": "Mode partagé",
+    "View Only": "Afficher uniquement",
+    "Clip to Window": "Clip à fenêtre",
+    "Scaling Mode:": "Mode mise à l'échelle:",
+    "None": "Aucun",
+    "Local Scaling": "Mise à l'échelle locale",
+    "Remote Resizing": "Redimensionnement à distance",
+    "Advanced": "Avancé",
+    "Quality:": "Qualité:",
+    "Compression level:": "Niveau de compression:",
+    "Repeater ID:": "ID Répéteur:",
+    "WebSocket": "WebSocket",
+    "Encrypt": "Crypter",
+    "Host:": "Hôte:",
+    "Port:": "Port:",
+    "Path:": "Chemin:",
+    "Automatic Reconnect": "Reconnecter automatiquemen",
+    "Reconnect Delay (ms):": "Délai de reconnexion (ms):",
+    "Show Dot when No Cursor": "Afficher le point lorsqu'il n'y a pas de curseur",
+    "Logging:": "Se connecter:",
+    "Version:": "Version:",
+    "Disconnect": "Déconnecter",
+    "Connect": "Connecter",
+    "Username:": "Nom d'utilisateur:",
+    "Password:": "Mot de passe:",
+    "Send Credentials": "Envoyer les identifiants",
+    "Cancel": "Annuler"
+}

static/novnc/app/locale/ja.json

@@ -0,0 +1,72 @@
+{
+    "Connecting...": "接続しています...",
+    "Disconnecting...": "切断しています...",
+    "Reconnecting...": "再接続しています...",
+    "Internal error": "内部エラー",
+    "Must set host": "ホストを設定する必要があります",
+    "Connected (encrypted) to ": "接続しました (暗号化済み): ",
+    "Connected (unencrypted) to ": "接続しました (暗号化されていません): ",
+    "Something went wrong, connection is closed": "何らかの問題で、接続が閉じられました",
+    "Failed to connect to server": "サーバーへの接続に失敗しました",
+    "Disconnected": "切断しました",
+    "New connection has been rejected with reason: ": "新規接続は次の理由で拒否されました: ",
+    "New connection has been rejected": "新規接続は拒否されました",
+    "Credentials are required": "資格情報が必要です",
+    "noVNC encountered an error:": "noVNC でエラーが発生しました:",
+    "Hide/Show the control bar": "コントロールバーを隠す/表示する",
+    "Drag": "ドラッグ",
+    "Move/Drag Viewport": "ビューポートを移動/ドラッグ",
+    "Keyboard": "キーボード",
+    "Show Keyboard": "キーボードを表示",
+    "Extra keys": "追加キー",
+    "Show Extra Keys": "追加キーを表示",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "Ctrl キーを切り替え",
+    "Alt": "Alt",
+    "Toggle Alt": "Alt キーを切り替え",
+    "Toggle Windows": "Windows キーを切り替え",
+    "Windows": "Windows",
+    "Send Tab": "Tab キーを送信",
+    "Tab": "Tab",
+    "Esc": "Esc",
+    "Send Escape": "Escape キーを送信",
+    "Ctrl+Alt+Del": "Ctrl+Alt+Del",
+    "Send Ctrl-Alt-Del": "Ctrl-Alt-Del を送信",
+    "Shutdown/Reboot": "シャットダウン/再起動",
+    "Shutdown/Reboot...": "シャットダウン/再起動...",
+    "Power": "電源",
+    "Shutdown": "シャットダウン",
+    "Reboot": "再起動",
+    "Reset": "リセット",
+    "Clipboard": "クリップボード",
+    "Clear": "クリア",
+    "Fullscreen": "全画面表示",
+    "Settings": "設定",
+    "Shared Mode": "共有モード",
+    "View Only": "表示のみ",
+    "Clip to Window": "ウィンドウにクリップ",
+    "Scaling Mode:": "スケーリングモード:",
+    "None": "なし",
+    "Local Scaling": "ローカルスケーリング",
+    "Remote Resizing": "リモートでリサイズ",
+    "Advanced": "高度",
+    "Quality:": "品質:",
+    "Compression level:": "圧縮レベル:",
+    "Repeater ID:": "リピーター ID:",
+    "WebSocket": "WebSocket",
+    "Encrypt": "暗号化",
+    "Host:": "ホスト:",
+    "Port:": "ポート:",
+    "Path:": "パス:",
+    "Automatic Reconnect": "自動再接続",
+    "Reconnect Delay (ms):": "再接続する遅延 (ミリ秒):",
+    "Show Dot when No Cursor": "カーソルがないときにドットを表示",
+    "Logging:": "ロギング:",
+    "Version:": "バージョン:",
+    "Disconnect": "切断",
+    "Connect": "接続",
+    "Username:": "ユーザー名:",
+    "Password:": "パスワード:",
+    "Send Credentials": "資格情報を送信",
+    "Cancel": "キャンセル"
+}

static/novnc/app/locale/ko.json

@@ -0,0 +1,70 @@
+{
+    "Connecting...": "연결중...",
+    "Disconnecting...": "연결 해제중...",
+    "Reconnecting...": "재연결중...",
+    "Internal error": "내부 오류",
+    "Must set host": "호스트는 설정되어야 합니다.",
+    "Connected (encrypted) to ": "다음과 (암호화되어) 연결되었습니다:",
+    "Connected (unencrypted) to ": "다음과 (암호화 없이) 연결되었습니다:",
+    "Something went wrong, connection is closed": "무언가 잘못되었습니다, 연결이 닫혔습니다.",
+    "Failed to connect to server": "서버에 연결하지 못했습니다.",
+    "Disconnected": "연결이 해제되었습니다.",
+    "New connection has been rejected with reason: ": "새 연결이 다음 이유로 거부되었습니다:",
+    "New connection has been rejected": "새 연결이 거부되었습니다.",
+    "Password is required": "비밀번호가 필요합니다.",
+    "noVNC encountered an error:": "noVNC에 오류가 발생했습니다:",
+    "Hide/Show the control bar": "컨트롤 바 숨기기/보이기",
+    "Move/Drag Viewport": "움직이기/드래그 뷰포트",
+    "viewport drag": "뷰포트 드래그",
+    "Active Mouse Button": "마우스 버튼 활성화",
+    "No mousebutton": "마우스 버튼 없음",
+    "Left mousebutton": "왼쪽 마우스 버튼",
+    "Middle mousebutton": "중간 마우스 버튼",
+    "Right mousebutton": "오른쪽 마우스 버튼",
+    "Keyboard": "키보드",
+    "Show Keyboard": "키보드 보이기",
+    "Extra keys": "기타 키들",
+    "Show Extra Keys": "기타 키들 보이기",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "Ctrl 켜기/끄기",
+    "Alt": "Alt",
+    "Toggle Alt": "Alt 켜기/끄기",
+    "Send Tab": "Tab 보내기",
+    "Tab": "Tab",
+    "Esc": "Esc",
+    "Send Escape": "Esc 보내기",
+    "Ctrl+Alt+Del": "Ctrl+Alt+Del",
+    "Send Ctrl-Alt-Del": "Ctrl+Alt+Del 보내기",
+    "Shutdown/Reboot": "셧다운/리붓",
+    "Shutdown/Reboot...": "셧다운/리붓...",
+    "Power": "전원",
+    "Shutdown": "셧다운",
+    "Reboot": "리붓",
+    "Reset": "리셋",
+    "Clipboard": "클립보드",
+    "Clear": "지우기",
+    "Fullscreen": "전체화면",
+    "Settings": "설정",
+    "Shared Mode": "공유 모드",
+    "View Only": "보기 전용",
+    "Clip to Window": "창에 클립",
+    "Scaling Mode:": "스케일링 모드:",
+    "None": "없음",
+    "Local Scaling": "로컬 스케일링",
+    "Remote Resizing": "원격 크기 조절",
+    "Advanced": "고급",
+    "Repeater ID:": "중계 ID",
+    "WebSocket": "웹소켓",
+    "Encrypt": "암호화",
+    "Host:": "호스트:",
+    "Port:": "포트:",
+    "Path:": "위치:",
+    "Automatic Reconnect": "자동 재연결",
+    "Reconnect Delay (ms):": "재연결 지연 시간 (ms)",
+    "Logging:": "로깅",
+    "Disconnect": "연결 해제",
+    "Connect": "연결",
+    "Password:": "비밀번호:",
+    "Send Password": "비밀번호 전송",
+    "Cancel": "취소"
+}

static/novnc/app/locale/nl.json

@@ -0,0 +1,73 @@
+{
+    "Connecting...": "Verbinden...",
+    "Disconnecting...": "Verbinding verbreken...",
+    "Reconnecting...": "Opnieuw verbinding maken...",
+    "Internal error": "Interne fout",
+    "Must set host": "Host moeten worden ingesteld",
+    "Connected (encrypted) to ": "Verbonden (versleuteld) met ",
+    "Connected (unencrypted) to ": "Verbonden (onversleuteld) met ",
+    "Something went wrong, connection is closed": "Er iets fout gelopen, verbinding werd verbroken",
+    "Failed to connect to server": "Verbinding maken met server is mislukt",
+    "Disconnected": "Verbinding verbroken",
+    "New connection has been rejected with reason: ": "Nieuwe verbinding is geweigerd omwille van de volgende reden: ",
+    "New connection has been rejected": "Nieuwe verbinding is geweigerd",
+    "Password is required": "Wachtwoord is vereist",
+    "noVNC encountered an error:": "noVNC heeft een fout bemerkt:",
+    "Hide/Show the control bar": "Verberg/Toon de bedieningsbalk",
+    "Move/Drag Viewport": "Verplaats/Versleep Kijkvenster",
+    "viewport drag": "kijkvenster slepen",
+    "Active Mouse Button": "Actieve Muisknop",
+    "No mousebutton": "Geen muisknop",
+    "Left mousebutton": "Linker muisknop",
+    "Middle mousebutton": "Middelste muisknop",
+    "Right mousebutton": "Rechter muisknop",
+    "Keyboard": "Toetsenbord",
+    "Show Keyboard": "Toon Toetsenbord",
+    "Extra keys": "Extra toetsen",
+    "Show Extra Keys": "Toon Extra Toetsen",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "Ctrl omschakelen",
+    "Alt": "Alt",
+    "Toggle Alt": "Alt omschakelen",
+    "Toggle Windows": "Windows omschakelen",
+    "Windows": "Windows",
+    "Send Tab": "Tab Sturen",
+    "Tab": "Tab",
+    "Esc": "Esc",
+    "Send Escape": "Escape Sturen",
+    "Ctrl+Alt+Del": "Ctrl-Alt-Del",
+    "Send Ctrl-Alt-Del": "Ctrl-Alt-Del Sturen",
+    "Shutdown/Reboot": "Uitschakelen/Herstarten",
+    "Shutdown/Reboot...": "Uitschakelen/Herstarten...",
+    "Power": "Systeem",
+    "Shutdown": "Uitschakelen",
+    "Reboot": "Herstarten",
+    "Reset": "Resetten",
+    "Clipboard": "Klembord",
+    "Clear": "Wissen",
+    "Fullscreen": "Volledig Scherm",
+    "Settings": "Instellingen",
+    "Shared Mode": "Gedeelde Modus",
+    "View Only": "Alleen Kijken",
+    "Clip to Window": "Randen buiten venster afsnijden",
+    "Scaling Mode:": "Schaalmodus:",
+    "None": "Geen",
+    "Local Scaling": "Lokaal Schalen",
+    "Remote Resizing": "Op Afstand Formaat Wijzigen",
+    "Advanced": "Geavanceerd",
+    "Repeater ID:": "Repeater ID:",
+    "WebSocket": "WebSocket",
+    "Encrypt": "Versleutelen",
+    "Host:": "Host:",
+    "Port:": "Poort:",
+    "Path:": "Pad:",
+    "Automatic Reconnect": "Automatisch Opnieuw Verbinden",
+    "Reconnect Delay (ms):": "Vertraging voor Opnieuw Verbinden (ms):",
+    "Show Dot when No Cursor": "Geef stip weer indien geen cursor",
+    "Logging:": "Logmeldingen:",
+    "Disconnect": "Verbinding verbreken",
+    "Connect": "Verbinden",
+    "Password:": "Wachtwoord:",
+    "Send Password": "Verzend Wachtwoord:",
+    "Cancel": "Annuleren"
+}

static/novnc/app/locale/pl.json

@@ -0,0 +1,69 @@
+{
+    "Connecting...": "Łączenie...",
+    "Disconnecting...": "Rozłączanie...",
+    "Reconnecting...": "Łączenie...",
+    "Internal error": "Błąd wewnętrzny",
+    "Must set host": "Host i port są wymagane",
+    "Connected (encrypted) to ": "Połączenie (szyfrowane) z ",
+    "Connected (unencrypted) to ": "Połączenie (nieszyfrowane) z ",
+    "Something went wrong, connection is closed": "Coś poszło źle, połączenie zostało zamknięte",
+    "Disconnected": "Rozłączony",
+    "New connection has been rejected with reason: ": "Nowe połączenie zostało odrzucone z powodu: ",
+    "New connection has been rejected": "Nowe połączenie zostało odrzucone",
+    "Password is required": "Hasło jest wymagane",
+    "noVNC encountered an error:": "noVNC napotkało błąd:",
+    "Hide/Show the control bar": "Pokaż/Ukryj pasek ustawień",
+    "Move/Drag Viewport": "Ruszaj/Przeciągaj Viewport",
+    "viewport drag": "przeciągnij viewport",
+    "Active Mouse Button": "Aktywny Przycisk Myszy",
+    "No mousebutton": "Brak przycisku myszy",
+    "Left mousebutton": "Lewy przycisk myszy",
+    "Middle mousebutton": "Środkowy przycisk myszy",
+    "Right mousebutton": "Prawy przycisk myszy",
+    "Keyboard": "Klawiatura",
+    "Show Keyboard": "Pokaż klawiaturę",
+    "Extra keys": "Przyciski dodatkowe",
+    "Show Extra Keys": "Pokaż przyciski dodatkowe",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "Przełącz Ctrl",
+    "Alt": "Alt",
+    "Toggle Alt": "Przełącz Alt",
+    "Send Tab": "Wyślij Tab",
+    "Tab": "Tab",
+    "Esc": "Esc",
+    "Send Escape": "Wyślij Escape",
+    "Ctrl+Alt+Del": "Ctrl+Alt+Del",
+    "Send Ctrl-Alt-Del": "Wyślij Ctrl-Alt-Del",
+    "Shutdown/Reboot": "Wyłącz/Uruchom ponownie",
+    "Shutdown/Reboot...": "Wyłącz/Uruchom ponownie...",
+    "Power": "Włączony",
+    "Shutdown": "Wyłącz",
+    "Reboot": "Uruchom ponownie",
+    "Reset": "Resetuj",
+    "Clipboard": "Schowek",
+    "Clear": "Wyczyść",
+    "Fullscreen": "Pełny ekran",
+    "Settings": "Ustawienia",
+    "Shared Mode": "Tryb Współdzielenia",
+    "View Only": "Tylko Podgląd",
+    "Clip to Window": "Przytnij do Okna",
+    "Scaling Mode:": "Tryb Skalowania:",
+    "None": "Brak",
+    "Local Scaling": "Skalowanie lokalne",
+    "Remote Resizing": "Skalowanie zdalne",
+    "Advanced": "Zaawansowane",
+    "Repeater ID:": "ID Repeatera:",
+    "WebSocket": "WebSocket",
+    "Encrypt": "Szyfrowanie",
+    "Host:": "Host:",
+    "Port:": "Port:",
+    "Path:": "Ścieżka:",
+    "Automatic Reconnect": "Automatycznie wznawiaj połączenie",
+    "Reconnect Delay (ms):": "Opóźnienie wznawiania (ms):",
+    "Logging:": "Poziom logowania:",
+    "Disconnect": "Rozłącz",
+    "Connect": "Połącz",
+    "Password:": "Hasło:",
+    "Cancel": "Anuluj",
+    "Canvas not supported.": "Element Canvas nie jest wspierany."
+}

static/novnc/app/locale/pt_BR.json

@@ -0,0 +1,72 @@
+{
+    "Connecting...": "Conectando...",
+    "Disconnecting...": "Desconectando...",
+    "Reconnecting...": "Reconectando...",
+    "Internal error": "Erro interno",
+    "Must set host": "É necessário definir o host",
+    "Connected (encrypted) to ": "Conectado (com criptografia) a ",
+    "Connected (unencrypted) to ": "Conectado (sem criptografia) a ",
+    "Something went wrong, connection is closed": "Algo deu errado. A conexão foi encerrada.",
+    "Failed to connect to server": "Falha ao conectar-se ao servidor",
+    "Disconnected": "Desconectado",
+    "New connection has been rejected with reason: ": "A nova conexão foi rejeitada pelo motivo: ",
+    "New connection has been rejected": "A nova conexão foi rejeitada",
+    "Credentials are required": "Credenciais são obrigatórias",
+    "noVNC encountered an error:": "O noVNC encontrou um erro:",
+    "Hide/Show the control bar": "Esconder/mostrar a barra de controles",
+    "Drag": "Arrastar",
+    "Move/Drag Viewport": "Mover/arrastar a janela",
+    "Keyboard": "Teclado",
+    "Show Keyboard": "Mostrar teclado",
+    "Extra keys": "Teclas adicionais",
+    "Show Extra Keys": "Mostar teclas adicionais",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "Pressionar/soltar Ctrl",
+    "Alt": "Alt",
+    "Toggle Alt": "Pressionar/soltar Alt",
+    "Toggle Windows": "Pressionar/soltar Windows",
+    "Windows": "Windows",
+    "Send Tab": "Enviar Tab",
+    "Tab": "Tab",
+    "Esc": "Esc",
+    "Send Escape": "Enviar Esc",
+    "Ctrl+Alt+Del": "Ctrl+Alt+Del",
+    "Send Ctrl-Alt-Del": "Enviar Ctrl-Alt-Del",
+    "Shutdown/Reboot": "Desligar/reiniciar",
+    "Shutdown/Reboot...": "Desligar/reiniciar...",
+    "Power": "Ligar",
+    "Shutdown": "Desligar",
+    "Reboot": "Reiniciar",
+    "Reset": "Reiniciar (forçado)",
+    "Clipboard": "Área de transferência",
+    "Clear": "Limpar",
+    "Fullscreen": "Tela cheia",
+    "Settings": "Configurações",
+    "Shared Mode": "Modo compartilhado",
+    "View Only": "Apenas visualizar",
+    "Clip to Window": "Recortar à janela",
+    "Scaling Mode:": "Modo de dimensionamento:",
+    "None": "Nenhum",
+    "Local Scaling": "Local",
+    "Remote Resizing": "Remoto",
+    "Advanced": "Avançado",
+    "Quality:": "Qualidade:",
+    "Compression level:": "Nível de compressão:",
+    "Repeater ID:": "ID do repetidor:",
+    "WebSocket": "WebSocket",
+    "Encrypt": "Criptografar",
+    "Host:": "Host:",
+    "Port:": "Porta:",
+    "Path:": "Caminho:",
+    "Automatic Reconnect": "Reconexão automática",
+    "Reconnect Delay (ms):": "Atraso da reconexão (ms)",
+    "Show Dot when No Cursor": "Mostrar ponto quando não há cursor",
+    "Logging:": "Registros:",
+    "Version:": "Versão:",
+    "Disconnect": "Desconectar",
+    "Connect": "Conectar",
+    "Username:": "Nome de usuário:",
+    "Password:": "Senha:",
+    "Send Credentials": "Enviar credenciais",
+    "Cancel": "Cancelar"
+}

static/novnc/app/locale/ru.json

@@ -0,0 +1,72 @@
+{
+    "Connecting...": "Подключение...",
+    "Disconnecting...": "Отключение...",
+    "Reconnecting...": "Переподключение...",
+    "Internal error": "Внутренняя ошибка",
+    "Must set host": "Задайте имя сервера или IP",
+    "Connected (encrypted) to ": "Подключено (с шифрованием) к ",
+    "Connected (unencrypted) to ": "Подключено (без шифрования) к ",
+    "Something went wrong, connection is closed": "Что-то пошло не так, подключение разорвано",
+    "Failed to connect to server": "Ошибка подключения к серверу",
+    "Disconnected": "Отключено",
+    "New connection has been rejected with reason: ": "Новое соединение отклонено по причине: ",
+    "New connection has been rejected": "Новое соединение отклонено",
+    "Credentials are required": "Требуются учетные данные",
+    "noVNC encountered an error:": "Ошибка noVNC: ",
+    "Hide/Show the control bar": "Скрыть/Показать контрольную панель",
+    "Drag": "Переместить",
+    "Move/Drag Viewport": "Переместить окно",
+    "Keyboard": "Клавиатура",
+    "Show Keyboard": "Показать клавиатуру",
+    "Extra keys": "Дополнительные Кнопки",
+    "Show Extra Keys": "Показать Дополнительные Кнопки",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "Переключение нажатия Ctrl",
+    "Alt": "Alt",
+    "Toggle Alt": "Переключение нажатия Alt",
+    "Toggle Windows": "Переключение вкладок",
+    "Windows": "Вкладка",
+    "Send Tab": "Передать нажатие Tab",
+    "Tab": "Tab",
+    "Esc": "Esc",
+    "Send Escape": "Передать нажатие Escape",
+    "Ctrl+Alt+Del": "Ctrl+Alt+Del",
+    "Send Ctrl-Alt-Del": "Передать нажатие Ctrl-Alt-Del",
+    "Shutdown/Reboot": "Выключить/Перезагрузить",
+    "Shutdown/Reboot...": "Выключить/Перезагрузить...",
+    "Power": "Питание",
+    "Shutdown": "Выключить",
+    "Reboot": "Перезагрузить",
+    "Reset": "Сброс",
+    "Clipboard": "Буфер обмена",
+    "Clear": "Очистить",
+    "Fullscreen": "Во весь экран",
+    "Settings": "Настройки",
+    "Shared Mode": "Общий режим",
+    "View Only": "Только Просмотр",
+    "Clip to Window": "В окно",
+    "Scaling Mode:": "Масштаб:",
+    "None": "Нет",
+    "Local Scaling": "Локльный масштаб",
+    "Remote Resizing": "Удаленная перенастройка размера",
+    "Advanced": "Дополнительно",
+    "Quality:": "Качество",
+    "Compression level:": "Уровень Сжатия",
+    "Repeater ID:": "Идентификатор ID:",
+    "WebSocket": "WebSocket",
+    "Encrypt": "Шифрование",
+    "Host:": "Сервер:",
+    "Port:": "Порт:",
+    "Path:": "Путь:",
+    "Automatic Reconnect": "Автоматическое переподключение",
+    "Reconnect Delay (ms):": "Задержка переподключения (мс):",
+    "Show Dot when No Cursor": "Показать точку вместо курсора",
+    "Logging:": "Лог:",
+    "Version:": "Версия",
+    "Disconnect": "Отключение",
+    "Connect": "Подключение",
+    "Username:": "Имя Пользователя",
+    "Password:": "Пароль:",
+    "Send Credentials": "Передача Учетных Данных",
+    "Cancel": "Выход"
+}

static/novnc/app/locale/sv.json

@@ -0,0 +1,72 @@
+{
+    "Connecting...": "Ansluter...",
+    "Disconnecting...": "Kopplar ner...",
+    "Reconnecting...": "Återansluter...",
+    "Internal error": "Internt fel",
+    "Must set host": "Du måste specifiera en värd",
+    "Connected (encrypted) to ": "Ansluten (krypterat) till ",
+    "Connected (unencrypted) to ": "Ansluten (okrypterat) till ",
+    "Something went wrong, connection is closed": "Något gick fel, anslutningen avslutades",
+    "Failed to connect to server": "Misslyckades att ansluta till servern",
+    "Disconnected": "Frånkopplad",
+    "New connection has been rejected with reason: ": "Ny anslutning har blivit nekad med följande skäl: ",
+    "New connection has been rejected": "Ny anslutning har blivit nekad",
+    "Credentials are required": "Användaruppgifter krävs",
+    "noVNC encountered an error:": "noVNC stötte på ett problem:",
+    "Hide/Show the control bar": "Göm/Visa kontrollbaren",
+    "Drag": "Dra",
+    "Move/Drag Viewport": "Flytta/Dra Vyn",
+    "Keyboard": "Tangentbord",
+    "Show Keyboard": "Visa Tangentbord",
+    "Extra keys": "Extraknappar",
+    "Show Extra Keys": "Visa Extraknappar",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "Växla Ctrl",
+    "Alt": "Alt",
+    "Toggle Alt": "Växla Alt",
+    "Toggle Windows": "Växla Windows",
+    "Windows": "Windows",
+    "Send Tab": "Skicka Tab",
+    "Tab": "Tab",
+    "Esc": "Esc",
+    "Send Escape": "Skicka Escape",
+    "Ctrl+Alt+Del": "Ctrl+Alt+Del",
+    "Send Ctrl-Alt-Del": "Skicka Ctrl-Alt-Del",
+    "Shutdown/Reboot": "Stäng av/Boota om",
+    "Shutdown/Reboot...": "Stäng av/Boota om...",
+    "Power": "Ström",
+    "Shutdown": "Stäng av",
+    "Reboot": "Boota om",
+    "Reset": "Återställ",
+    "Clipboard": "Urklipp",
+    "Clear": "Rensa",
+    "Fullscreen": "Fullskärm",
+    "Settings": "Inställningar",
+    "Shared Mode": "Delat Läge",
+    "View Only": "Endast Visning",
+    "Clip to Window": "Begränsa till Fönster",
+    "Scaling Mode:": "Skalningsläge:",
+    "None": "Ingen",
+    "Local Scaling": "Lokal Skalning",
+    "Remote Resizing": "Ändra Storlek",
+    "Advanced": "Avancerat",
+    "Quality:": "Kvalitet:",
+    "Compression level:": "Kompressionsnivå:",
+    "Repeater ID:": "Repeater-ID:",
+    "WebSocket": "WebSocket",
+    "Encrypt": "Kryptera",
+    "Host:": "Värd:",
+    "Port:": "Port:",
+    "Path:": "Sökväg:",
+    "Automatic Reconnect": "Automatisk Återanslutning",
+    "Reconnect Delay (ms):": "Fördröjning (ms):",
+    "Show Dot when No Cursor": "Visa prick när ingen muspekare finns",
+    "Logging:": "Loggning:",
+    "Version:": "Version:",
+    "Disconnect": "Koppla från",
+    "Connect": "Anslut",
+    "Username:": "Användarnamn:",
+    "Password:": "Lösenord:",
+    "Send Credentials": "Skicka Användaruppgifter",
+    "Cancel": "Avbryt"
+}

static/novnc/app/locale/tr.json

@@ -0,0 +1,69 @@
+{
+    "Connecting...": "Bağlanıyor...",
+    "Disconnecting...": "Bağlantı kesiliyor...",
+    "Reconnecting...": "Yeniden bağlantı kuruluyor...",
+    "Internal error": "İç hata",
+    "Must set host": "Sunucuyu kur",
+    "Connected (encrypted) to ": "Bağlı (şifrelenmiş)",
+    "Connected (unencrypted) to ": "Bağlandı (şifrelenmemiş)",
+    "Something went wrong, connection is closed": "Bir şeyler ters gitti, bağlantı kesildi",
+    "Disconnected": "Bağlantı kesildi",
+    "New connection has been rejected with reason: ": "Bağlantı aşağıdaki nedenlerden dolayı reddedildi: ",
+    "New connection has been rejected": "Bağlantı reddedildi",
+    "Password is required": "Şifre gerekli",
+    "noVNC encountered an error:": "Bir hata oluştu:",
+    "Hide/Show the control bar": "Denetim masasını Gizle/Göster",
+    "Move/Drag Viewport": "Görünümü Taşı/Sürükle",
+    "viewport drag": "Görüntü penceresini sürükle",
+    "Active Mouse Button": "Aktif Fare Düğmesi",
+    "No mousebutton": "Fare düğmesi yok",
+    "Left mousebutton": "Farenin sol düğmesi",
+    "Middle mousebutton": "Farenin orta düğmesi",
+    "Right mousebutton": "Farenin sağ düğmesi",
+    "Keyboard": "Klavye",
+    "Show Keyboard": "Klavye Düzenini Göster",
+    "Extra keys": "Ekstra tuşlar",
+    "Show Extra Keys": "Ekstra tuşları göster",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "Ctrl Değiştir ",
+    "Alt": "Alt",
+    "Toggle Alt": "Alt Değiştir",
+    "Send Tab": "Sekme Gönder",
+    "Tab": "Sekme",
+    "Esc": "Esc",
+    "Send Escape": "Boşluk Gönder",
+    "Ctrl+Alt+Del": "Ctrl + Alt + Del",
+    "Send Ctrl-Alt-Del": "Ctrl-Alt-Del Gönder",
+    "Shutdown/Reboot": "Kapat/Yeniden Başlat",
+    "Shutdown/Reboot...": "Kapat/Yeniden Başlat...",
+    "Power": "Güç",
+    "Shutdown": "Kapat",
+    "Reboot": "Yeniden Başlat",
+    "Reset": "Sıfırla",
+    "Clipboard": "Pano",
+    "Clear": "Temizle",
+    "Fullscreen": "Tam Ekran",
+    "Settings": "Ayarlar",
+    "Shared Mode": "Paylaşım Modu",
+    "View Only": "Sadece Görüntüle",
+    "Clip to Window": "Pencereye Tıkla",
+    "Scaling Mode:": "Ölçekleme Modu:",
+    "None": "Bilinmeyen",
+    "Local Scaling": "Yerel Ölçeklendirme",
+    "Remote Resizing": "Uzaktan Yeniden Boyutlandırma",
+    "Advanced": "Gelişmiş",
+    "Repeater ID:": "Tekralayıcı ID:",
+    "WebSocket": "WebSocket",
+    "Encrypt": "Şifrele",
+    "Host:": "Ana makine:",
+    "Port:": "Port:",
+    "Path:": "Yol:",
+    "Automatic Reconnect": "Otomatik Yeniden Bağlan",
+    "Reconnect Delay (ms):": "Yeniden Bağlanma Süreci (ms):",
+    "Logging:": "Giriş yapılıyor:",
+    "Disconnect": "Bağlantıyı Kes",
+    "Connect": "Bağlan",
+    "Password:": "Parola:",
+    "Cancel": "Vazgeç",
+    "Canvas not supported.": "Tuval desteklenmiyor."
+}

static/novnc/app/locale/zh_CN.json

@@ -0,0 +1,69 @@
+{
+    "Connecting...": "连接中...",
+    "Disconnecting...": "正在断开连接...",
+    "Reconnecting...": "重新连接中...",
+    "Internal error": "内部错误",
+    "Must set host": "请提供主机名",
+    "Connected (encrypted) to ": "已连接到（加密）",
+    "Connected (unencrypted) to ": "已连接到（未加密）",
+    "Something went wrong, connection is closed": "发生错误，连接已关闭",
+    "Failed to connect to server": "无法连接到服务器",
+    "Disconnected": "已断开连接",
+    "New connection has been rejected with reason: ": "连接被拒绝，原因：",
+    "New connection has been rejected": "连接被拒绝",
+    "Password is required": "请提供密码",
+    "noVNC encountered an error:": "noVNC 遇到一个错误：",
+    "Hide/Show the control bar": "显示/隐藏控制栏",
+    "Move/Drag Viewport": "拖放显示范围",
+    "viewport drag": "显示范围拖放",
+    "Active Mouse Button": "启动鼠标按鍵",
+    "No mousebutton": "禁用鼠标按鍵",
+    "Left mousebutton": "鼠标左鍵",
+    "Middle mousebutton": "鼠标中鍵",
+    "Right mousebutton": "鼠标右鍵",
+    "Keyboard": "键盘",
+    "Show Keyboard": "显示键盘",
+    "Extra keys": "额外按键",
+    "Show Extra Keys": "显示额外按键",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "切换 Ctrl",
+    "Alt": "Alt",
+    "Toggle Alt": "切换 Alt",
+    "Send Tab": "发送 Tab 键",
+    "Tab": "Tab",
+    "Esc": "Esc",
+    "Send Escape": "发送 Escape 键",
+    "Ctrl+Alt+Del": "Ctrl-Alt-Del",
+    "Send Ctrl-Alt-Del": "发送 Ctrl-Alt-Del 键",
+    "Shutdown/Reboot": "关机/重新启动",
+    "Shutdown/Reboot...": "关机/重新启动...",
+    "Power": "电源",
+    "Shutdown": "关机",
+    "Reboot": "重新启动",
+    "Reset": "重置",
+    "Clipboard": "剪贴板",
+    "Clear": "清除",
+    "Fullscreen": "全屏",
+    "Settings": "设置",
+    "Shared Mode": "分享模式",
+    "View Only": "仅查看",
+    "Clip to Window": "限制/裁切窗口大小",
+    "Scaling Mode:": "缩放模式：",
+    "None": "无",
+    "Local Scaling": "本地缩放",
+    "Remote Resizing": "远程调整大小",
+    "Advanced": "高级",
+    "Repeater ID:": "中继站 ID",
+    "WebSocket": "WebSocket",
+    "Encrypt": "加密",
+    "Host:": "主机：",
+    "Port:": "端口：",
+    "Path:": "路径：",
+    "Automatic Reconnect": "自动重新连接",
+    "Reconnect Delay (ms):": "重新连接间隔 (ms)：",
+    "Logging:": "日志级别：",
+    "Disconnect": "中断连接",
+    "Connect": "连接",
+    "Password:": "密码：",
+    "Cancel": "取消"
+}

static/novnc/app/locale/zh_TW.json

@@ -0,0 +1,69 @@
+{
+    "Connecting...": "連線中...",
+    "Disconnecting...": "正在中斷連線...",
+    "Reconnecting...": "重新連線中...",
+    "Internal error": "內部錯誤",
+    "Must set host": "請提供主機資訊",
+    "Connected (encrypted) to ": "已加密連線到",
+    "Connected (unencrypted) to ": "未加密連線到",
+    "Something went wrong, connection is closed": "發生錯誤，連線已關閉",
+    "Failed to connect to server": "無法連線到伺服器",
+    "Disconnected": "連線已中斷",
+    "New connection has been rejected with reason: ": "連線被拒絕，原因：",
+    "New connection has been rejected": "連線被拒絕",
+    "Password is required": "請提供密碼",
+    "noVNC encountered an error:": "noVNC 遇到一個錯誤：",
+    "Hide/Show the control bar": "顯示/隱藏控制列",
+    "Move/Drag Viewport": "拖放顯示範圍",
+    "viewport drag": "顯示範圍拖放",
+    "Active Mouse Button": "啟用滑鼠按鍵",
+    "No mousebutton": "無滑鼠按鍵",
+    "Left mousebutton": "滑鼠左鍵",
+    "Middle mousebutton": "滑鼠中鍵",
+    "Right mousebutton": "滑鼠右鍵",
+    "Keyboard": "鍵盤",
+    "Show Keyboard": "顯示鍵盤",
+    "Extra keys": "額外按鍵",
+    "Show Extra Keys": "顯示額外按鍵",
+    "Ctrl": "Ctrl",
+    "Toggle Ctrl": "切換 Ctrl",
+    "Alt": "Alt",
+    "Toggle Alt": "切換 Alt",
+    "Send Tab": "送出 Tab 鍵",
+    "Tab": "Tab",
+    "Esc": "Esc",
+    "Send Escape": "送出 Escape 鍵",
+    "Ctrl+Alt+Del": "Ctrl-Alt-Del",
+    "Send Ctrl-Alt-Del": "送出 Ctrl-Alt-Del 快捷鍵",
+    "Shutdown/Reboot": "關機/重新啟動",
+    "Shutdown/Reboot...": "關機/重新啟動...",
+    "Power": "電源",
+    "Shutdown": "關機",
+    "Reboot": "重新啟動",
+    "Reset": "重設",
+    "Clipboard": "剪貼簿",
+    "Clear": "清除",
+    "Fullscreen": "全螢幕",
+    "Settings": "設定",
+    "Shared Mode": "分享模式",
+    "View Only": "僅檢視",
+    "Clip to Window": "限制/裁切視窗大小",
+    "Scaling Mode:": "縮放模式：",
+    "None": "無",
+    "Local Scaling": "本機縮放",
+    "Remote Resizing": "遠端調整大小",
+    "Advanced": "進階",
+    "Repeater ID:": "中繼站 ID",
+    "WebSocket": "WebSocket",
+    "Encrypt": "加密",
+    "Host:": "主機：",
+    "Port:": "連接埠：",
+    "Path:": "路徑：",
+    "Automatic Reconnect": "自動重新連線",
+    "Reconnect Delay (ms):": "重新連線間隔 (ms)：",
+    "Logging:": "日誌級別：",
+    "Disconnect": "中斷連線",
+    "Connect": "連線",
+    "Password:": "密碼：",
+    "Cancel": "取消"
+}

static/novnc/app/localization.js

@@ -0,0 +1,172 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2018 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+/*
+ * Localization Utilities
+ */
+
+export class Localizer {
+    constructor() {
+        // Currently configured language
+        this.language = 'en';
+
+        // Current dictionary of translations
+        this.dictionary = undefined;
+    }
+
+    // Configure suitable language based on user preferences
+    setup(supportedLanguages) {
+        this.language = 'en'; // Default: US English
+
+        /*
+         * Navigator.languages only available in Chrome (32+) and FireFox (32+)
+         * Fall back to navigator.language for other browsers
+         */
+        let userLanguages;
+        if (typeof window.navigator.languages == 'object') {
+            userLanguages = window.navigator.languages;
+        } else {
+            userLanguages = [navigator.language || navigator.userLanguage];
+        }
+
+        for (let i = 0;i < userLanguages.length;i++) {
+            const userLang = userLanguages[i]
+                .toLowerCase()
+                .replace("_", "-")
+                .split("-");
+
+            // Built-in default?
+            if ((userLang[0] === 'en') &&
+                ((userLang[1] === undefined) || (userLang[1] === 'us'))) {
+                return;
+            }
+
+            // First pass: perfect match
+            for (let j = 0; j < supportedLanguages.length; j++) {
+                const supLang = supportedLanguages[j]
+                    .toLowerCase()
+                    .replace("_", "-")
+                    .split("-");
+
+                if (userLang[0] !== supLang[0]) {
+                    continue;
+                }
+                if (userLang[1] !== supLang[1]) {
+                    continue;
+                }
+
+                this.language = supportedLanguages[j];
+                return;
+            }
+
+            // Second pass: fallback
+            for (let j = 0;j < supportedLanguages.length;j++) {
+                const supLang = supportedLanguages[j]
+                    .toLowerCase()
+                    .replace("_", "-")
+                    .split("-");
+
+                if (userLang[0] !== supLang[0]) {
+                    continue;
+                }
+                if (supLang[1] !== undefined) {
+                    continue;
+                }
+
+                this.language = supportedLanguages[j];
+                return;
+            }
+        }
+    }
+
+    // Retrieve localised text
+    get(id) {
+        if (typeof this.dictionary !== 'undefined' && this.dictionary[id]) {
+            return this.dictionary[id];
+        } else {
+            return id;
+        }
+    }
+
+    // Traverses the DOM and translates relevant fields
+    // See https://html.spec.whatwg.org/multipage/dom.html#attr-translate
+    translateDOM() {
+        const self = this;
+
+        function process(elem, enabled) {
+            function isAnyOf(searchElement, items) {
+                return items.indexOf(searchElement) !== -1;
+            }
+
+            function translateAttribute(elem, attr) {
+                const str = self.get(elem.getAttribute(attr));
+                elem.setAttribute(attr, str);
+            }
+
+            function translateTextNode(node) {
+                const str = self.get(node.data.trim());
+                node.data = str;
+            }
+
+            if (elem.hasAttribute("translate")) {
+                if (isAnyOf(elem.getAttribute("translate"), ["", "yes"])) {
+                    enabled = true;
+                } else if (isAnyOf(elem.getAttribute("translate"), ["no"])) {
+                    enabled = false;
+                }
+            }
+
+            if (enabled) {
+                if (elem.hasAttribute("abbr") &&
+                    elem.tagName === "TH") {
+                    translateAttribute(elem, "abbr");
+                }
+                if (elem.hasAttribute("alt") &&
+                    isAnyOf(elem.tagName, ["AREA", "IMG", "INPUT"])) {
+                    translateAttribute(elem, "alt");
+                }
+                if (elem.hasAttribute("download") &&
+                    isAnyOf(elem.tagName, ["A", "AREA"])) {
+                    translateAttribute(elem, "download");
+                }
+                if (elem.hasAttribute("label") &&
+                    isAnyOf(elem.tagName, ["MENUITEM", "MENU", "OPTGROUP",
+                                           "OPTION", "TRACK"])) {
+                    translateAttribute(elem, "label");
+                }
+                // FIXME: Should update "lang"
+                if (elem.hasAttribute("placeholder") &&
+                    isAnyOf(elem.tagName, ["INPUT", "TEXTAREA"])) {
+                    translateAttribute(elem, "placeholder");
+                }
+                if (elem.hasAttribute("title")) {
+                    translateAttribute(elem, "title");
+                }
+                if (elem.hasAttribute("value") &&
+                    elem.tagName === "INPUT" &&
+                    isAnyOf(elem.getAttribute("type"), ["reset", "button", "submit"])) {
+                    translateAttribute(elem, "value");
+                }
+            }
+
+            for (let i = 0; i < elem.childNodes.length; i++) {
+                const node = elem.childNodes[i];
+                if (node.nodeType === node.ELEMENT_NODE) {
+                    process(node, enabled);
+                } else if (node.nodeType === node.TEXT_NODE && enabled) {
+                    translateTextNode(node);
+                }
+            }
+        }
+
+        process(document.body, true);
+    }
+}
+
+export const l10n = new Localizer();
+export default l10n.get.bind(l10n);

static/novnc/app/sounds/CREDITS

@@ -0,0 +1,4 @@
+bell
+        Copyright: Dr. Richard Boulanger et al
+        URL: http://www.archive.org/details/Berklee44v12
+        License: CC-BY Attribution 3.0 Unported

static/novnc/app/styles/base.css

@@ -0,0 +1,970 @@
+/*
+ * noVNC base CSS
+ * Copyright (C) 2019 The noVNC Authors
+ * noVNC is licensed under the MPL 2.0 (see LICENSE.txt)
+ * This file is licensed under the 2-Clause BSD license (see LICENSE.txt).
+ */
+
+/*
+ * Z index layers:
+ *
+ * 0: Main screen
+ * 10: Control bar
+ * 50: Transition blocker
+ * 60: Connection popups
+ * 100: Status bar
+ * ...
+ * 1000: Javascript crash
+ * ...
+ * 10000: Max (used for polyfills)
+ */
+
+body {
+  margin:0;
+  padding:0;
+  font-family: Helvetica;
+  /*Background image with light grey curve.*/
+  background-color:#494949;
+  background-repeat:no-repeat;
+  background-position:right bottom;
+  height:100%;
+  touch-action: none;
+}
+
+html {
+  height:100%;
+}
+
+.noVNC_only_touch.noVNC_hidden {
+  display: none;
+}
+
+.noVNC_disabled {
+  color: rgb(128, 128, 128);
+}
+
+/* ----------------------------------------
+ * Spinner
+ * ----------------------------------------
+ */
+
+.noVNC_spinner {
+  position: relative;
+}
+.noVNC_spinner, .noVNC_spinner::before, .noVNC_spinner::after {
+  width: 10px;
+  height: 10px;
+  border-radius: 2px;
+  box-shadow: -60px 10px 0 rgba(255, 255, 255, 0);
+  animation: noVNC_spinner 1.0s linear infinite;
+}
+.noVNC_spinner::before {
+  content: "";
+  position: absolute;
+  left: 0px;
+  top: 0px;
+  animation-delay: -0.1s;
+}
+.noVNC_spinner::after {
+  content: "";
+  position: absolute;
+  top: 0px;
+  left: 0px;
+  animation-delay: 0.1s;
+}
+@keyframes noVNC_spinner {
+  0% { box-shadow: -60px 10px 0 rgba(255, 255, 255, 0); width: 20px; }
+  25% { box-shadow: 20px 10px 0 rgba(255, 255, 255, 1); width: 10px; }
+  50% { box-shadow: 60px 10px 0 rgba(255, 255, 255, 0); width: 10px; }
+}
+
+/* ----------------------------------------
+ * Input Elements
+ * ----------------------------------------
+ */
+
+input:not([type]),
+input[type=date],
+input[type=datetime-local],
+input[type=email],
+input[type=month],
+input[type=number],
+input[type=password],
+input[type=search],
+input[type=tel],
+input[type=text],
+input[type=time],
+input[type=url],
+input[type=week],
+textarea {
+  /* Disable default rendering */
+  -webkit-appearance: none;
+  -moz-appearance: none;
+  background: none;
+
+  margin: 2px;
+  padding: 2px;
+  border: 1px solid rgb(192, 192, 192);
+  border-radius: 5px;
+  color: black;
+  background: linear-gradient(to top, rgb(255, 255, 255) 80%, rgb(240, 240, 240));
+}
+
+input[type=button],
+input[type=color],
+input[type=reset],
+input[type=submit],
+select {
+  /* Disable default rendering */
+  -webkit-appearance: none;
+  -moz-appearance: none;
+  background: none;
+
+  margin: 2px;
+  padding: 2px;
+  border: 1px solid rgb(192, 192, 192);
+  border-bottom-width: 2px;
+  border-radius: 5px;
+  color: black;
+  background: linear-gradient(to top, rgb(255, 255, 255), rgb(240, 240, 240));
+
+  /* This avoids it jumping around when :active */
+  vertical-align: middle;
+}
+
+input[type=button],
+input[type=color],
+input[type=reset],
+input[type=submit] {
+  padding-left: 20px;
+  padding-right: 20px;
+}
+
+option {
+  color: black;
+  background: white;
+}
+
+input:not([type]):focus,
+input[type=button]:focus,
+input[type=color]:focus,
+input[type=date]:focus,
+input[type=datetime-local]:focus,
+input[type=email]:focus,
+input[type=month]:focus,
+input[type=number]:focus,
+input[type=password]:focus,
+input[type=reset]:focus,
+input[type=search]:focus,
+input[type=submit]:focus,
+input[type=tel]:focus,
+input[type=text]:focus,
+input[type=time]:focus,
+input[type=url]:focus,
+input[type=week]:focus,
+select:focus,
+textarea:focus {
+  box-shadow: 0px 0px 3px rgba(74, 144, 217, 0.5);
+  border-color: rgb(74, 144, 217);
+  outline: none;
+}
+
+input[type=button]::-moz-focus-inner,
+input[type=color]::-moz-focus-inner,
+input[type=reset]::-moz-focus-inner,
+input[type=submit]::-moz-focus-inner {
+  border: none;
+}
+
+input:not([type]):disabled,
+input[type=button]:disabled,
+input[type=color]:disabled,
+input[type=date]:disabled,
+input[type=datetime-local]:disabled,
+input[type=email]:disabled,
+input[type=month]:disabled,
+input[type=number]:disabled,
+input[type=password]:disabled,
+input[type=reset]:disabled,
+input[type=search]:disabled,
+input[type=submit]:disabled,
+input[type=tel]:disabled,
+input[type=text]:disabled,
+input[type=time]:disabled,
+input[type=url]:disabled,
+input[type=week]:disabled,
+select:disabled,
+textarea:disabled {
+  color: rgb(128, 128, 128);
+  background: rgb(240, 240, 240);
+}
+
+input[type=button]:active,
+input[type=color]:active,
+input[type=reset]:active,
+input[type=submit]:active,
+select:active {
+  border-bottom-width: 1px;
+  margin-top: 3px;
+}
+
+:root:not(.noVNC_touch) input[type=button]:hover:not(:disabled),
+:root:not(.noVNC_touch) input[type=color]:hover:not(:disabled),
+:root:not(.noVNC_touch) input[type=reset]:hover:not(:disabled),
+:root:not(.noVNC_touch) input[type=submit]:hover:not(:disabled),
+:root:not(.noVNC_touch) select:hover:not(:disabled) {
+  background: linear-gradient(to top, rgb(255, 255, 255), rgb(250, 250, 250));
+}
+
+/* ----------------------------------------
+ * WebKit centering hacks
+ * ----------------------------------------
+ */
+
+.noVNC_center {
+  /*
+   * This is a workaround because webkit misrenders transforms and
+   * uses non-integer coordinates, resulting in blurry content.
+   * Ideally we'd use "top: 50%; transform: translateY(-50%);" on
+   * the objects instead.
+   */
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  pointer-events: none;
+}
+.noVNC_center > * {
+  pointer-events: auto;
+}
+.noVNC_vcenter {
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  position: fixed;
+  top: 0;
+  left: 0;
+  height: 100%;
+  pointer-events: none;
+}
+.noVNC_vcenter > * {
+  pointer-events: auto;
+}
+
+/* ----------------------------------------
+ * Layering
+ * ----------------------------------------
+ */
+
+.noVNC_connect_layer {
+  z-index: 60;
+}
+
+/* ----------------------------------------
+ * Fallback error
+ * ----------------------------------------
+ */
+
+#noVNC_fallback_error {
+  z-index: 1000;
+  visibility: hidden;
+}
+#noVNC_fallback_error.noVNC_open {
+  visibility: visible;
+}
+
+#noVNC_fallback_error > div {
+  max-width: 90%;
+  padding: 15px;
+
+  transition: 0.5s ease-in-out;
+
+  transform: translateY(-50px);
+  opacity: 0;
+
+  text-align: center;
+  font-weight: bold;
+  color: #fff;
+
+  border-radius: 10px;
+  box-shadow: 6px 6px 0px rgba(0, 0, 0, 0.5);
+  background: rgba(200,55,55,0.8);
+}
+#noVNC_fallback_error.noVNC_open > div {
+  transform: translateY(0);
+  opacity: 1;
+}
+
+#noVNC_fallback_errormsg {
+  font-weight: normal;
+}
+
+#noVNC_fallback_errormsg .noVNC_message {
+  display: inline-block;
+  text-align: left;
+  font-family: monospace;
+  white-space: pre-wrap;
+}
+
+#noVNC_fallback_error .noVNC_location {
+  font-style: italic;
+  font-size: 0.8em;
+  color: rgba(255, 255, 255, 0.8);
+}
+
+#noVNC_fallback_error .noVNC_stack {
+  max-height: 50vh;
+  padding: 10px;
+  margin: 10px;
+  font-size: 0.8em;
+  text-align: left;
+  font-family: monospace;
+  white-space: pre;
+  border: 1px solid rgba(0, 0, 0, 0.5);
+  background: rgba(0, 0, 0, 0.2);
+  overflow: auto;
+}
+
+/* ----------------------------------------
+ * Control Bar
+ * ----------------------------------------
+ */
+
+#noVNC_control_bar_anchor {
+  /* The anchor is needed to get z-stacking to work */
+  position: fixed;
+  z-index: 10;
+
+  transition: 0.5s ease-in-out;
+
+  /* Edge misrenders animations wihthout this */
+  transform: translateX(0);
+}
+:root.noVNC_connected #noVNC_control_bar_anchor.noVNC_idle {
+  opacity: 0.8;
+}
+#noVNC_control_bar_anchor.noVNC_right {
+  left: auto;
+  right: 0;
+}
+
+#noVNC_control_bar {
+  position: relative;
+  left: -100%;
+
+  transition: 0.5s ease-in-out;
+
+  background-color: rgb(110, 132, 163);
+  border-radius: 0 10px 10px 0;
+
+}
+#noVNC_control_bar.noVNC_open {
+  box-shadow: 6px 6px 0px rgba(0, 0, 0, 0.5);
+  left: 0;
+}
+#noVNC_control_bar::before {
+  /* This extra element is to get a proper shadow */
+  content: "";
+  position: absolute;
+  z-index: -1;
+  height: 100%;
+  width: 30px;
+  left: -30px;
+  transition: box-shadow 0.5s ease-in-out;
+}
+#noVNC_control_bar.noVNC_open::before {
+  box-shadow: 6px 6px 0px rgba(0, 0, 0, 0.5);
+}
+.noVNC_right #noVNC_control_bar {
+  left: 100%;
+  border-radius: 10px 0 0 10px;
+}
+.noVNC_right #noVNC_control_bar.noVNC_open {
+  left: 0;
+}
+.noVNC_right #noVNC_control_bar::before {
+  visibility: hidden;
+}
+
+#noVNC_control_bar_handle {
+  position: absolute;
+  left: -15px;
+  top: 0;
+  transform: translateY(35px);
+  width: calc(100% + 30px);
+  height: 50px;
+  z-index: -1;
+  cursor: pointer;
+  border-radius: 5px;
+  background-color: rgb(83, 99, 122);
+  background-image: url("../images/handle_bg.svg");
+  background-repeat: no-repeat;
+  background-position: right;
+  box-shadow: 3px 3px 0px rgba(0, 0, 0, 0.5);
+}
+#noVNC_control_bar_handle:after {
+  content: "";
+  transition: transform 0.5s ease-in-out;
+  background: url("../images/handle.svg");
+  position: absolute;
+  top: 22px; /* (50px-6px)/2 */
+  right: 5px;
+  width: 5px;
+  height: 6px;
+}
+#noVNC_control_bar.noVNC_open #noVNC_control_bar_handle:after {
+  transform: translateX(1px) rotate(180deg);
+}
+:root:not(.noVNC_connected) #noVNC_control_bar_handle {
+  display: none;
+}
+.noVNC_right #noVNC_control_bar_handle {
+  background-position: left;
+}
+.noVNC_right #noVNC_control_bar_handle:after {
+  left: 5px;
+  right: 0;
+  transform: translateX(1px) rotate(180deg);
+}
+.noVNC_right #noVNC_control_bar.noVNC_open #noVNC_control_bar_handle:after {
+  transform: none;
+}
+#noVNC_control_bar_handle div {
+  position: absolute;
+  right: -35px;
+  top: 0;
+  width: 50px;
+  height: 50px;
+}
+:root:not(.noVNC_touch) #noVNC_control_bar_handle div {
+  display: none;
+}
+.noVNC_right #noVNC_control_bar_handle div {
+  left: -35px;
+  right: auto;
+}
+
+#noVNC_control_bar .noVNC_scroll {
+  max-height: 100vh; /* Chrome is buggy with 100% */
+  overflow-x: hidden;
+  overflow-y: auto;
+  padding: 0 10px 0 5px;
+}
+.noVNC_right #noVNC_control_bar .noVNC_scroll {
+  padding: 0 5px 0 10px;
+}
+
+/* Control bar hint */
+#noVNC_control_bar_hint {
+  position: fixed;
+  left: calc(100vw - 50px);
+  right: auto;
+  top: 50%;
+  transform: translateY(-50%) scale(0);
+  width: 100px;
+  height: 50%;
+  max-height: 600px;
+
+  visibility: hidden;
+  opacity: 0;
+  transition: 0.2s ease-in-out;
+  background: transparent;
+  box-shadow: 0 0 10px black, inset 0 0 10px 10px rgba(110, 132, 163, 0.8);
+  border-radius: 10px;
+  transition-delay: 0s;
+}
+#noVNC_control_bar_anchor.noVNC_right #noVNC_control_bar_hint{
+  left: auto;
+  right: calc(100vw - 50px);
+}
+#noVNC_control_bar_hint.noVNC_active {
+  visibility: visible;
+  opacity: 1;
+  transition-delay: 0.2s;
+  transform: translateY(-50%) scale(1);
+}
+
+/* General button style */
+.noVNC_button {
+  display: block;
+  padding: 4px 4px;
+  margin: 10px 0;
+  vertical-align: middle;
+  border:1px solid rgba(255, 255, 255, 0.2);
+  border-radius: 6px;
+}
+.noVNC_button.noVNC_selected {
+  border-color: rgba(0, 0, 0, 0.8);
+  background: rgba(0, 0, 0, 0.5);
+}
+.noVNC_button:disabled {
+  opacity: 0.4;
+}
+.noVNC_button:focus {
+  outline: none;
+}
+.noVNC_button:active {
+  padding-top: 5px;
+  padding-bottom: 3px;
+}
+/* Android browsers don't properly update hover state if touch events
+ * are intercepted, but focus should be safe to display */
+:root:not(.noVNC_touch) .noVNC_button.noVNC_selected:hover,
+.noVNC_button.noVNC_selected:focus {
+  border-color: rgba(0, 0, 0, 0.4);
+  background: rgba(0, 0, 0, 0.2);
+}
+:root:not(.noVNC_touch) .noVNC_button:hover,
+.noVNC_button:focus {
+  background: rgba(255, 255, 255, 0.2);
+}
+.noVNC_button.noVNC_hidden {
+  display: none;
+}
+
+/* Panels */
+.noVNC_panel {
+  transform: translateX(25px);
+
+  transition: 0.5s ease-in-out;
+
+  max-height: 100vh; /* Chrome is buggy with 100% */
+  overflow-x: hidden;
+  overflow-y: auto;
+
+  visibility: hidden;
+  opacity: 0;
+
+  padding: 15px;
+
+  background: #fff;
+  border-radius: 10px;
+  color: #000;
+  border: 2px solid #E0E0E0;
+  box-shadow: 6px 6px 0px rgba(0, 0, 0, 0.5);
+}
+.noVNC_panel.noVNC_open {
+  visibility: visible;
+  opacity: 1;
+  transform: translateX(75px);
+}
+.noVNC_right .noVNC_vcenter {
+  left: auto;
+  right: 0;
+}
+.noVNC_right .noVNC_panel {
+  transform: translateX(-25px);
+}
+.noVNC_right .noVNC_panel.noVNC_open {
+  transform: translateX(-75px);
+}
+
+.noVNC_panel hr {
+  border: none;
+  border-top: 1px solid rgb(192, 192, 192);
+}
+
+.noVNC_panel label {
+  display: block;
+  white-space: nowrap;
+}
+
+.noVNC_panel .noVNC_heading {
+  background-color: rgb(110, 132, 163);
+  border-radius: 5px;
+  padding: 5px;
+  /* Compensate for padding in image */
+  padding-right: 8px;
+  color: white;
+  font-size: 20px;
+  margin-bottom: 10px;
+  white-space: nowrap;
+}
+.noVNC_panel .noVNC_heading img {
+  vertical-align: bottom;
+}
+
+.noVNC_submit {
+  float: right;
+}
+
+/* Expanders */
+.noVNC_expander {
+  cursor: pointer;
+}
+.noVNC_expander::before {
+  content: url("../images/expander.svg");
+  display: inline-block;
+  margin-right: 5px;
+  transition: 0.2s ease-in-out;
+}
+.noVNC_expander.noVNC_open::before {
+  transform: rotateZ(90deg);
+}
+.noVNC_expander ~ * {
+  margin: 5px;
+  margin-left: 10px;
+  padding: 5px;
+  background: rgba(0, 0, 0, 0.05);
+  border-radius: 5px;
+}
+.noVNC_expander:not(.noVNC_open) ~ * {
+  display: none;
+}
+
+/* Control bar content */
+
+#noVNC_control_bar .noVNC_logo {
+  font-size: 13px;
+}
+
+:root:not(.noVNC_connected) #noVNC_view_drag_button {
+  display: none;
+}
+
+/* noVNC Touch Device only buttons */
+:root:not(.noVNC_connected) #noVNC_mobile_buttons {
+  display: none;
+}
+:root:not(.noVNC_touch) #noVNC_mobile_buttons {
+  display: none;
+}
+
+/* Extra manual keys */
+:root:not(.noVNC_connected) #noVNC_toggle_extra_keys_button {
+  display: none;
+}
+
+#noVNC_modifiers {
+  background-color: rgb(92, 92, 92);
+  border: none;
+  padding: 0 10px;
+}
+
+/* Shutdown/Reboot */
+:root:not(.noVNC_connected) #noVNC_power_button {
+  display: none;
+}
+#noVNC_power {
+}
+#noVNC_power_buttons {
+  display: none;
+}
+
+#noVNC_power input[type=button] {
+  width: 100%;
+}
+
+/* Clipboard */
+:root:not(.noVNC_connected) #noVNC_clipboard_button {
+  display: none;
+}
+#noVNC_clipboard {
+  /* Full screen, minus padding and left and right margins */
+  max-width: calc(100vw - 2*15px - 75px - 25px);
+}
+#noVNC_clipboard_text {
+  width: 500px;
+  max-width: 100%;
+}
+
+/* Settings */
+#noVNC_settings {
+}
+#noVNC_settings ul {
+  list-style: none;
+  margin: 0px;
+  padding: 0px;
+}
+#noVNC_setting_port {
+  width: 80px;
+}
+#noVNC_setting_path {
+  width: 100px;
+}
+
+/* Version */
+
+.noVNC_version_wrapper {
+  font-size: small;
+}
+
+.noVNC_version {
+  margin-left: 1rem;
+}
+
+/* Connection Controls */
+:root:not(.noVNC_connected) #noVNC_disconnect_button {
+  display: none;
+}
+
+/* ----------------------------------------
+ * Status Dialog
+ * ----------------------------------------
+ */
+
+#noVNC_status {
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100%;
+  z-index: 100;
+  transform: translateY(-100%);
+
+  cursor: pointer;
+
+  transition: 0.5s ease-in-out;
+
+  visibility: hidden;
+  opacity: 0;
+
+  padding: 5px;
+
+  display: flex;
+  flex-direction: row;
+  justify-content: center;
+  align-content: center;
+
+  line-height: 25px;
+  word-wrap: break-word;
+  color: #fff;
+
+  border-bottom: 1px solid rgba(0, 0, 0, 0.9);
+}
+#noVNC_status.noVNC_open {
+  transform: translateY(0);
+  visibility: visible;
+  opacity: 1;
+}
+
+#noVNC_status::before {
+  content: "";
+  display: inline-block;
+  width: 25px;
+  height: 25px;
+  margin-right: 5px;
+}
+
+#noVNC_status.noVNC_status_normal {
+  background: rgba(128,128,128,0.9);
+}
+#noVNC_status.noVNC_status_normal::before {
+  content: url("../images/info.svg") " ";
+}
+#noVNC_status.noVNC_status_error {
+  background: rgba(200,55,55,0.9);
+}
+#noVNC_status.noVNC_status_error::before {
+  content: url("../images/error.svg") " ";
+}
+#noVNC_status.noVNC_status_warn {
+  background: rgba(180,180,30,0.9);
+}
+#noVNC_status.noVNC_status_warn::before {
+  content: url("../images/warning.svg") " ";
+}
+
+/* ----------------------------------------
+ * Connect Dialog
+ * ----------------------------------------
+ */
+
+#noVNC_connect_dlg {
+  transition: 0.5s ease-in-out;
+
+  transform: scale(0, 0);
+  visibility: hidden;
+  opacity: 0;
+}
+#noVNC_connect_dlg.noVNC_open {
+  transform: scale(1, 1);
+  visibility: visible;
+  opacity: 1;
+}
+#noVNC_connect_dlg .noVNC_logo {
+  transition: 0.5s ease-in-out;
+  padding: 10px;
+  margin-bottom: 10px;
+
+  font-size: 80px;
+  text-align: center;
+
+  border-radius: 5px;
+}
+@media (max-width: 440px) {
+  #noVNC_connect_dlg {
+    max-width: calc(100vw - 100px);
+  }
+  #noVNC_connect_dlg .noVNC_logo {
+    font-size: calc(25vw - 30px);
+  }
+}
+#noVNC_connect_button {
+  cursor: pointer;
+
+  padding: 10px;
+
+  color: white;
+  background-color: rgb(110, 132, 163);
+  border-radius: 12px;
+
+  text-align: center;
+  font-size: 20px;
+
+  box-shadow: 6px 6px 0px rgba(0, 0, 0, 0.5);
+}
+#noVNC_connect_button div {
+  margin: 2px;
+  padding: 5px 30px;
+  border: 1px solid rgb(83, 99, 122);
+  border-bottom-width: 2px;
+  border-radius: 5px;
+  background: linear-gradient(to top, rgb(110, 132, 163), rgb(99, 119, 147));
+
+  /* This avoids it jumping around when :active */
+  vertical-align: middle;
+}
+#noVNC_connect_button div:active {
+  border-bottom-width: 1px;
+  margin-top: 3px;
+}
+:root:not(.noVNC_touch) #noVNC_connect_button div:hover {
+  background: linear-gradient(to top, rgb(110, 132, 163), rgb(105, 125, 155));
+}
+
+#noVNC_connect_button img {
+  vertical-align: bottom;
+  height: 1.3em;
+}
+
+/* ----------------------------------------
+ * Password Dialog
+ * ----------------------------------------
+ */
+
+#noVNC_credentials_dlg {
+  position: relative;
+
+  transform: translateY(-50px);
+}
+#noVNC_credentials_dlg.noVNC_open {
+  transform: translateY(0);
+}
+#noVNC_credentials_dlg ul {
+  list-style: none;
+  margin: 0px;
+  padding: 0px;
+}
+.noVNC_hidden {
+  display: none;
+}
+
+
+/* ----------------------------------------
+ * Main Area
+ * ----------------------------------------
+ */
+
+/* Transition screen */
+#noVNC_transition {
+  display: none;
+
+  position: fixed;
+  top: 0;
+  left: 0;
+  bottom: 0;
+  right: 0;
+
+  color: white;
+  background: rgba(0, 0, 0, 0.5);
+  z-index: 50;
+
+  /*display: flex;*/
+  align-items: center;
+  justify-content: center;
+  flex-direction: column;
+}
+:root.noVNC_loading #noVNC_transition,
+:root.noVNC_connecting #noVNC_transition,
+:root.noVNC_disconnecting #noVNC_transition,
+:root.noVNC_reconnecting #noVNC_transition {
+  display: flex;
+}
+:root:not(.noVNC_reconnecting) #noVNC_cancel_reconnect_button {
+  display: none;
+}
+#noVNC_transition_text {
+  font-size: 1.5em;
+}
+
+/* Main container */
+#noVNC_container {
+  width: 100%;
+  height: 100%;
+  background-color: #313131;
+  border-bottom-right-radius: 800px 600px;
+  /*border-top-left-radius: 800px 600px;*/
+}
+
+#noVNC_keyboardinput {
+  width: 1px;
+  height: 1px;
+  background-color: #fff;
+  color: #fff;
+  border: 0;
+  position: absolute;
+  left: -40px;
+  z-index: -1;
+  ime-mode: disabled;
+}
+
+/*Default noVNC logo.*/
+/* From: http://fonts.googleapis.com/css?family=Orbitron:700 */
+@font-face {
+  font-family: 'Orbitron';
+  font-style: normal;
+  font-weight: 700;
+  src: local('?'), url('Orbitron700.woff') format('woff'),
+                   url('Orbitron700.ttf') format('truetype');
+}
+
+.noVNC_logo {
+  color:yellow;
+  font-family: 'Orbitron', 'OrbitronTTF', sans-serif;
+  line-height:90%;
+  text-shadow: 0.1em 0.1em 0 black;
+}
+.noVNC_logo span{
+  color:green;
+}
+
+#noVNC_bell {
+  display: none;
+}
+
+/* ----------------------------------------
+ * Media sizing
+ * ----------------------------------------
+ */
+
+@media screen and (max-width: 640px){
+  #noVNC_logo {
+    font-size: 150px;
+  }
+}
+
+@media screen and (min-width: 321px) and (max-width: 480px) {
+  #noVNC_logo {
+    font-size: 110px;
+  }
+}
+
+@media screen and (max-width: 320px) {
+  #noVNC_logo {
+    font-size: 90px;
+  }
+}

static/novnc/app/ui.js

@@ -0,0 +1,1715 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+import * as Log from '../core/util/logging.js';
+import _, { l10n } from './localization.js';
+import { isTouchDevice, isSafari, hasScrollbarGutter, dragThreshold }
+    from '../core/util/browser.js';
+import { setCapture, getPointerEvent } from '../core/util/events.js';
+import KeyTable from "../core/input/keysym.js";
+import keysyms from "../core/input/keysymdef.js";
+import Keyboard from "../core/input/keyboard.js";
+import RFB from "../core/rfb.js";
+import * as WebUtil from "./webutil.js";
+
+const PAGE_TITLE = "noVNC";
+
+const UI = {
+
+    connected: false,
+    desktopName: "",
+
+    statusTimeout: null,
+    hideKeyboardTimeout: null,
+    idleControlbarTimeout: null,
+    closeControlbarTimeout: null,
+
+    controlbarGrabbed: false,
+    controlbarDrag: false,
+    controlbarMouseDownClientY: 0,
+    controlbarMouseDownOffsetY: 0,
+
+    lastKeyboardinput: null,
+    defaultKeyboardinputLen: 100,
+
+    inhibitReconnect: true,
+    reconnectCallback: null,
+    reconnectPassword: null,
+
+    prime() {
+        return WebUtil.initSettings().then(() => {
+            if (document.readyState === "interactive" || document.readyState === "complete") {
+                return UI.start();
+            }
+
+            return new Promise((resolve, reject) => {
+                document.addEventListener('DOMContentLoaded', () => UI.start().then(resolve).catch(reject));
+            });
+        });
+    },
+
+    // Render default UI and initialize settings menu
+    start() {
+
+        UI.initSettings();
+
+        // Translate the DOM
+        l10n.translateDOM();
+
+        fetch('./package.json')
+            .then((response) => {
+                if (!response.ok) {
+                    throw Error("" + response.status + " " + response.statusText);
+                }
+                return response.json();
+            })
+            .then((packageInfo) => {
+                Array.from(document.getElementsByClassName('noVNC_version')).forEach(el => el.innerText = packageInfo.version);
+            })
+            .catch((err) => {
+                Log.Error("Couldn't fetch package.json: " + err);
+                Array.from(document.getElementsByClassName('noVNC_version_wrapper'))
+                    .concat(Array.from(document.getElementsByClassName('noVNC_version_separator')))
+                    .forEach(el => el.style.display = 'none');
+            });
+
+        // Adapt the interface for touch screen devices
+        if (isTouchDevice) {
+            document.documentElement.classList.add("noVNC_touch");
+            // Remove the address bar
+            setTimeout(() => window.scrollTo(0, 1), 100);
+        }
+
+        // Restore control bar position
+        if (WebUtil.readSetting('controlbar_pos') === 'right') {
+            UI.toggleControlbarSide();
+        }
+
+        UI.initFullscreen();
+
+        // Setup event handlers
+        UI.addControlbarHandlers();
+        UI.addTouchSpecificHandlers();
+        UI.addExtraKeysHandlers();
+        UI.addMachineHandlers();
+        UI.addConnectionControlHandlers();
+        UI.addClipboardHandlers();
+        UI.addSettingsHandlers();
+        document.getElementById("noVNC_status")
+            .addEventListener('click', UI.hideStatus);
+
+        // Bootstrap fallback input handler
+        UI.keyboardinputReset();
+
+        UI.openControlbar();
+
+        UI.updateVisualState('init');
+
+        document.documentElement.classList.remove("noVNC_loading");
+
+        let autoconnect = WebUtil.getConfigVar('autoconnect', false);
+        if (autoconnect === 'true' || autoconnect == '1') {
+            autoconnect = true;
+            UI.connect();
+        } else {
+            autoconnect = false;
+            // Show the connect panel on first load unless autoconnecting
+            UI.openConnectPanel();
+        }
+
+        return Promise.resolve(UI.rfb);
+    },
+
+    initFullscreen() {
+        // Only show the button if fullscreen is properly supported
+        // * Safari doesn't support alphanumerical input while in fullscreen
+        if (!isSafari() &&
+            (document.documentElement.requestFullscreen ||
+             document.documentElement.mozRequestFullScreen ||
+             document.documentElement.webkitRequestFullscreen ||
+             document.body.msRequestFullscreen)) {
+            document.getElementById('noVNC_fullscreen_button')
+                .classList.remove("noVNC_hidden");
+            UI.addFullscreenHandlers();
+        }
+    },
+
+    initSettings() {
+        // Logging selection dropdown
+        const llevels = ['error', 'warn', 'info', 'debug'];
+        for (let i = 0; i < llevels.length; i += 1) {
+            UI.addOption(document.getElementById('noVNC_setting_logging'), llevels[i], llevels[i]);
+        }
+
+        // Settings with immediate effects
+        UI.initSetting('logging', 'warn');
+        UI.updateLogging();
+
+        // if port == 80 (or 443) then it won't be present and should be
+        // set manually
+        let port = window.location.port;
+        if (!port) {
+            if (window.location.protocol.substring(0, 5) == 'https') {
+                port = 443;
+            } else if (window.location.protocol.substring(0, 4) == 'http') {
+                port = 80;
+            }
+        }
+
+        /* Populate the controls if defaults are provided in the URL */
+        UI.initSetting('host', window.location.hostname);
+        UI.initSetting('port', port);
+        UI.initSetting('encrypt', (window.location.protocol === "https:"));
+        UI.initSetting('view_clip', false);
+        UI.initSetting('resize', 'off');
+        UI.initSetting('quality', 6);
+        UI.initSetting('compression', 2);
+        UI.initSetting('shared', true);
+        UI.initSetting('view_only', false);
+        UI.initSetting('show_dot', false);
+        UI.initSetting('path', 'websockify');
+        UI.initSetting('repeaterID', '');
+        UI.initSetting('reconnect', false);
+        UI.initSetting('reconnect_delay', 5000);
+
+        UI.setupSettingLabels();
+    },
+    // Adds a link to the label elements on the corresponding input elements
+    setupSettingLabels() {
+        const labels = document.getElementsByTagName('LABEL');
+        for (let i = 0; i < labels.length; i++) {
+            const htmlFor = labels[i].htmlFor;
+            if (htmlFor != '') {
+                const elem = document.getElementById(htmlFor);
+                if (elem) elem.label = labels[i];
+            } else {
+                // If 'for' isn't set, use the first input element child
+                const children = labels[i].children;
+                for (let j = 0; j < children.length; j++) {
+                    if (children[j].form !== undefined) {
+                        children[j].label = labels[i];
+                        break;
+                    }
+                }
+            }
+        }
+    },
+
+/* ------^-------
+*     /INIT
+* ==============
+* EVENT HANDLERS
+* ------v------*/
+
+    addControlbarHandlers() {
+        document.getElementById("noVNC_control_bar")
+            .addEventListener('mousemove', UI.activateControlbar);
+        document.getElementById("noVNC_control_bar")
+            .addEventListener('mouseup', UI.activateControlbar);
+        document.getElementById("noVNC_control_bar")
+            .addEventListener('mousedown', UI.activateControlbar);
+        document.getElementById("noVNC_control_bar")
+            .addEventListener('keydown', UI.activateControlbar);
+
+        document.getElementById("noVNC_control_bar")
+            .addEventListener('mousedown', UI.keepControlbar);
+        document.getElementById("noVNC_control_bar")
+            .addEventListener('keydown', UI.keepControlbar);
+
+        document.getElementById("noVNC_view_drag_button")
+            .addEventListener('click', UI.toggleViewDrag);
+
+        document.getElementById("noVNC_control_bar_handle")
+            .addEventListener('mousedown', UI.controlbarHandleMouseDown);
+        document.getElementById("noVNC_control_bar_handle")
+            .addEventListener('mouseup', UI.controlbarHandleMouseUp);
+        document.getElementById("noVNC_control_bar_handle")
+            .addEventListener('mousemove', UI.dragControlbarHandle);
+        // resize events aren't available for elements
+        window.addEventListener('resize', UI.updateControlbarHandle);
+
+        const exps = document.getElementsByClassName("noVNC_expander");
+        for (let i = 0;i < exps.length;i++) {
+            exps[i].addEventListener('click', UI.toggleExpander);
+        }
+    },
+
+    addTouchSpecificHandlers() {
+        document.getElementById("noVNC_keyboard_button")
+            .addEventListener('click', UI.toggleVirtualKeyboard);
+
+        UI.touchKeyboard = new Keyboard(document.getElementById('noVNC_keyboardinput'));
+        UI.touchKeyboard.onkeyevent = UI.keyEvent;
+        UI.touchKeyboard.grab();
+        document.getElementById("noVNC_keyboardinput")
+            .addEventListener('input', UI.keyInput);
+        document.getElementById("noVNC_keyboardinput")
+            .addEventListener('focus', UI.onfocusVirtualKeyboard);
+        document.getElementById("noVNC_keyboardinput")
+            .addEventListener('blur', UI.onblurVirtualKeyboard);
+        document.getElementById("noVNC_keyboardinput")
+            .addEventListener('submit', () => false);
+
+        document.documentElement
+            .addEventListener('mousedown', UI.keepVirtualKeyboard, true);
+
+        document.getElementById("noVNC_control_bar")
+            .addEventListener('touchstart', UI.activateControlbar);
+        document.getElementById("noVNC_control_bar")
+            .addEventListener('touchmove', UI.activateControlbar);
+        document.getElementById("noVNC_control_bar")
+            .addEventListener('touchend', UI.activateControlbar);
+        document.getElementById("noVNC_control_bar")
+            .addEventListener('input', UI.activateControlbar);
+
+        document.getElementById("noVNC_control_bar")
+            .addEventListener('touchstart', UI.keepControlbar);
+        document.getElementById("noVNC_control_bar")
+            .addEventListener('input', UI.keepControlbar);
+
+        document.getElementById("noVNC_control_bar_handle")
+            .addEventListener('touchstart', UI.controlbarHandleMouseDown);
+        document.getElementById("noVNC_control_bar_handle")
+            .addEventListener('touchend', UI.controlbarHandleMouseUp);
+        document.getElementById("noVNC_control_bar_handle")
+            .addEventListener('touchmove', UI.dragControlbarHandle);
+    },
+
+    addExtraKeysHandlers() {
+        document.getElementById("noVNC_toggle_extra_keys_button")
+            .addEventListener('click', UI.toggleExtraKeys);
+        document.getElementById("noVNC_toggle_ctrl_button")
+            .addEventListener('click', UI.toggleCtrl);
+        document.getElementById("noVNC_toggle_windows_button")
+            .addEventListener('click', UI.toggleWindows);
+        document.getElementById("noVNC_toggle_alt_button")
+            .addEventListener('click', UI.toggleAlt);
+        document.getElementById("noVNC_send_tab_button")
+            .addEventListener('click', UI.sendTab);
+        document.getElementById("noVNC_send_esc_button")
+            .addEventListener('click', UI.sendEsc);
+        document.getElementById("noVNC_send_ctrl_alt_del_button")
+            .addEventListener('click', UI.sendCtrlAltDel);
+    },
+
+    addMachineHandlers() {
+        document.getElementById("noVNC_shutdown_button")
+            .addEventListener('click', () => UI.rfb.machineShutdown());
+        document.getElementById("noVNC_reboot_button")
+            .addEventListener('click', () => UI.rfb.machineReboot());
+        document.getElementById("noVNC_reset_button")
+            .addEventListener('click', () => UI.rfb.machineReset());
+        document.getElementById("noVNC_power_button")
+            .addEventListener('click', UI.togglePowerPanel);
+    },
+
+    addConnectionControlHandlers() {
+        document.getElementById("noVNC_disconnect_button")
+            .addEventListener('click', UI.disconnect);
+        document.getElementById("noVNC_connect_button")
+            .addEventListener('click', UI.connect);
+        document.getElementById("noVNC_cancel_reconnect_button")
+            .addEventListener('click', UI.cancelReconnect);
+
+        document.getElementById("noVNC_credentials_button")
+            .addEventListener('click', UI.setCredentials);
+    },
+
+    addClipboardHandlers() {
+        document.getElementById("noVNC_clipboard_button")
+            .addEventListener('click', UI.toggleClipboardPanel);
+        document.getElementById("noVNC_clipboard_text")
+            .addEventListener('change', UI.clipboardSend);
+        document.getElementById("noVNC_clipboard_clear_button")
+            .addEventListener('click', UI.clipboardClear);
+    },
+
+    // Add a call to save settings when the element changes,
+    // unless the optional parameter changeFunc is used instead.
+    addSettingChangeHandler(name, changeFunc) {
+        const settingElem = document.getElementById("noVNC_setting_" + name);
+        if (changeFunc === undefined) {
+            changeFunc = () => UI.saveSetting(name);
+        }
+        settingElem.addEventListener('change', changeFunc);
+    },
+
+    addSettingsHandlers() {
+        document.getElementById("noVNC_settings_button")
+            .addEventListener('click', UI.toggleSettingsPanel);
+
+        UI.addSettingChangeHandler('encrypt');
+        UI.addSettingChangeHandler('resize');
+        UI.addSettingChangeHandler('resize', UI.applyResizeMode);
+        UI.addSettingChangeHandler('resize', UI.updateViewClip);
+        UI.addSettingChangeHandler('quality');
+        UI.addSettingChangeHandler('quality', UI.updateQuality);
+        UI.addSettingChangeHandler('compression');
+        UI.addSettingChangeHandler('compression', UI.updateCompression);
+        UI.addSettingChangeHandler('view_clip');
+        UI.addSettingChangeHandler('view_clip', UI.updateViewClip);
+        UI.addSettingChangeHandler('shared');
+        UI.addSettingChangeHandler('view_only');
+        UI.addSettingChangeHandler('view_only', UI.updateViewOnly);
+        UI.addSettingChangeHandler('show_dot');
+        UI.addSettingChangeHandler('show_dot', UI.updateShowDotCursor);
+        UI.addSettingChangeHandler('host');
+        UI.addSettingChangeHandler('port');
+        UI.addSettingChangeHandler('path');
+        UI.addSettingChangeHandler('repeaterID');
+        UI.addSettingChangeHandler('logging');
+        UI.addSettingChangeHandler('logging', UI.updateLogging);
+        UI.addSettingChangeHandler('reconnect');
+        UI.addSettingChangeHandler('reconnect_delay');
+    },
+
+    addFullscreenHandlers() {
+        document.getElementById("noVNC_fullscreen_button")
+            .addEventListener('click', UI.toggleFullscreen);
+
+        window.addEventListener('fullscreenchange', UI.updateFullscreenButton);
+        window.addEventListener('mozfullscreenchange', UI.updateFullscreenButton);
+        window.addEventListener('webkitfullscreenchange', UI.updateFullscreenButton);
+        window.addEventListener('msfullscreenchange', UI.updateFullscreenButton);
+    },
+
+/* ------^-------
+ * /EVENT HANDLERS
+ * ==============
+ *     VISUAL
+ * ------v------*/
+
+    // Disable/enable controls depending on connection state
+    updateVisualState(state) {
+
+        document.documentElement.classList.remove("noVNC_connecting");
+        document.documentElement.classList.remove("noVNC_connected");
+        document.documentElement.classList.remove("noVNC_disconnecting");
+        document.documentElement.classList.remove("noVNC_reconnecting");
+
+        const transitionElem = document.getElementById("noVNC_transition_text");
+        switch (state) {
+            case 'init':
+                break;
+            case 'connecting':
+                transitionElem.textContent = _("Connecting...");
+                document.documentElement.classList.add("noVNC_connecting");
+                break;
+            case 'connected':
+                document.documentElement.classList.add("noVNC_connected");
+                break;
+            case 'disconnecting':
+                transitionElem.textContent = _("Disconnecting...");
+                document.documentElement.classList.add("noVNC_disconnecting");
+                break;
+            case 'disconnected':
+                break;
+            case 'reconnecting':
+                transitionElem.textContent = _("Reconnecting...");
+                document.documentElement.classList.add("noVNC_reconnecting");
+                break;
+            default:
+                Log.Error("Invalid visual state: " + state);
+                UI.showStatus(_("Internal error"), 'error');
+                return;
+        }
+
+        if (UI.connected) {
+            UI.updateViewClip();
+
+            UI.disableSetting('encrypt');
+            UI.disableSetting('shared');
+            UI.disableSetting('host');
+            UI.disableSetting('port');
+            UI.disableSetting('path');
+            UI.disableSetting('repeaterID');
+
+            // Hide the controlbar after 2 seconds
+            UI.closeControlbarTimeout = setTimeout(UI.closeControlbar, 2000);
+        } else {
+            UI.enableSetting('encrypt');
+            UI.enableSetting('shared');
+            UI.enableSetting('host');
+            UI.enableSetting('port');
+            UI.enableSetting('path');
+            UI.enableSetting('repeaterID');
+            UI.updatePowerButton();
+            UI.keepControlbar();
+        }
+
+        // State change closes dialogs as they may not be relevant
+        // anymore
+        UI.closeAllPanels();
+        document.getElementById('noVNC_credentials_dlg')
+            .classList.remove('noVNC_open');
+    },
+
+    showStatus(text, statusType, time) {
+        const statusElem = document.getElementById('noVNC_status');
+
+        if (typeof statusType === 'undefined') {
+            statusType = 'normal';
+        }
+
+        // Don't overwrite more severe visible statuses and never
+        // errors. Only shows the first error.
+        if (statusElem.classList.contains("noVNC_open")) {
+            if (statusElem.classList.contains("noVNC_status_error")) {
+                return;
+            }
+            if (statusElem.classList.contains("noVNC_status_warn") &&
+                statusType === 'normal') {
+                return;
+            }
+        }
+
+        clearTimeout(UI.statusTimeout);
+
+        switch (statusType) {
+            case 'error':
+                statusElem.classList.remove("noVNC_status_warn");
+                statusElem.classList.remove("noVNC_status_normal");
+                statusElem.classList.add("noVNC_status_error");
+                break;
+            case 'warning':
+            case 'warn':
+                statusElem.classList.remove("noVNC_status_error");
+                statusElem.classList.remove("noVNC_status_normal");
+                statusElem.classList.add("noVNC_status_warn");
+                break;
+            case 'normal':
+            case 'info':
+            default:
+                statusElem.classList.remove("noVNC_status_error");
+                statusElem.classList.remove("noVNC_status_warn");
+                statusElem.classList.add("noVNC_status_normal");
+                break;
+        }
+
+        statusElem.textContent = text;
+        statusElem.classList.add("noVNC_open");
+
+        // If no time was specified, show the status for 1.5 seconds
+        if (typeof time === 'undefined') {
+            time = 1500;
+        }
+
+        // Error messages do not timeout
+        if (statusType !== 'error') {
+            UI.statusTimeout = window.setTimeout(UI.hideStatus, time);
+        }
+    },
+
+    hideStatus() {
+        clearTimeout(UI.statusTimeout);
+        document.getElementById('noVNC_status').classList.remove("noVNC_open");
+    },
+
+    activateControlbar(event) {
+        clearTimeout(UI.idleControlbarTimeout);
+        // We manipulate the anchor instead of the actual control
+        // bar in order to avoid creating new a stacking group
+        document.getElementById('noVNC_control_bar_anchor')
+            .classList.remove("noVNC_idle");
+        UI.idleControlbarTimeout = window.setTimeout(UI.idleControlbar, 2000);
+    },
+
+    idleControlbar() {
+        // Don't fade if a child of the control bar has focus
+        if (document.getElementById('noVNC_control_bar')
+            .contains(document.activeElement) && document.hasFocus()) {
+            UI.activateControlbar();
+            return;
+        }
+
+        document.getElementById('noVNC_control_bar_anchor')
+            .classList.add("noVNC_idle");
+    },
+
+    keepControlbar() {
+        clearTimeout(UI.closeControlbarTimeout);
+    },
+
+    openControlbar() {
+        document.getElementById('noVNC_control_bar')
+            .classList.add("noVNC_open");
+    },
+
+    closeControlbar() {
+        UI.closeAllPanels();
+        document.getElementById('noVNC_control_bar')
+            .classList.remove("noVNC_open");
+        UI.rfb.focus();
+    },
+
+    toggleControlbar() {
+        if (document.getElementById('noVNC_control_bar')
+            .classList.contains("noVNC_open")) {
+            UI.closeControlbar();
+        } else {
+            UI.openControlbar();
+        }
+    },
+
+    toggleControlbarSide() {
+        // Temporarily disable animation, if bar is displayed, to avoid weird
+        // movement. The transitionend-event will not fire when display=none.
+        const bar = document.getElementById('noVNC_control_bar');
+        const barDisplayStyle = window.getComputedStyle(bar).display;
+        if (barDisplayStyle !== 'none') {
+            bar.style.transitionDuration = '0s';
+            bar.addEventListener('transitionend', () => bar.style.transitionDuration = '');
+        }
+
+        const anchor = document.getElementById('noVNC_control_bar_anchor');
+        if (anchor.classList.contains("noVNC_right")) {
+            WebUtil.writeSetting('controlbar_pos', 'left');
+            anchor.classList.remove("noVNC_right");
+        } else {
+            WebUtil.writeSetting('controlbar_pos', 'right');
+            anchor.classList.add("noVNC_right");
+        }
+
+        // Consider this a movement of the handle
+        UI.controlbarDrag = true;
+    },
+
+    showControlbarHint(show) {
+        const hint = document.getElementById('noVNC_control_bar_hint');
+        if (show) {
+            hint.classList.add("noVNC_active");
+        } else {
+            hint.classList.remove("noVNC_active");
+        }
+    },
+
+    dragControlbarHandle(e) {
+        if (!UI.controlbarGrabbed) return;
+
+        const ptr = getPointerEvent(e);
+
+        const anchor = document.getElementById('noVNC_control_bar_anchor');
+        if (ptr.clientX < (window.innerWidth * 0.1)) {
+            if (anchor.classList.contains("noVNC_right")) {
+                UI.toggleControlbarSide();
+            }
+        } else if (ptr.clientX > (window.innerWidth * 0.9)) {
+            if (!anchor.classList.contains("noVNC_right")) {
+                UI.toggleControlbarSide();
+            }
+        }
+
+        if (!UI.controlbarDrag) {
+            const dragDistance = Math.abs(ptr.clientY - UI.controlbarMouseDownClientY);
+
+            if (dragDistance < dragThreshold) return;
+
+            UI.controlbarDrag = true;
+        }
+
+        const eventY = ptr.clientY - UI.controlbarMouseDownOffsetY;
+
+        UI.moveControlbarHandle(eventY);
+
+        e.preventDefault();
+        e.stopPropagation();
+        UI.keepControlbar();
+        UI.activateControlbar();
+    },
+
+    // Move the handle but don't allow any position outside the bounds
+    moveControlbarHandle(viewportRelativeY) {
+        const handle = document.getElementById("noVNC_control_bar_handle");
+        const handleHeight = handle.getBoundingClientRect().height;
+        const controlbarBounds = document.getElementById("noVNC_control_bar")
+            .getBoundingClientRect();
+        const margin = 10;
+
+        // These heights need to be non-zero for the below logic to work
+        if (handleHeight === 0 || controlbarBounds.height === 0) {
+            return;
+        }
+
+        let newY = viewportRelativeY;
+
+        // Check if the coordinates are outside the control bar
+        if (newY < controlbarBounds.top + margin) {
+            // Force coordinates to be below the top of the control bar
+            newY = controlbarBounds.top + margin;
+
+        } else if (newY > controlbarBounds.top +
+                   controlbarBounds.height - handleHeight - margin) {
+            // Force coordinates to be above the bottom of the control bar
+            newY = controlbarBounds.top +
+                controlbarBounds.height - handleHeight - margin;
+        }
+
+        // Corner case: control bar too small for stable position
+        if (controlbarBounds.height < (handleHeight + margin * 2)) {
+            newY = controlbarBounds.top +
+                (controlbarBounds.height - handleHeight) / 2;
+        }
+
+        // The transform needs coordinates that are relative to the parent
+        const parentRelativeY = newY - controlbarBounds.top;
+        handle.style.transform = "translateY(" + parentRelativeY + "px)";
+    },
+
+    updateControlbarHandle() {
+        // Since the control bar is fixed on the viewport and not the page,
+        // the move function expects coordinates relative the the viewport.
+        const handle = document.getElementById("noVNC_control_bar_handle");
+        const handleBounds = handle.getBoundingClientRect();
+        UI.moveControlbarHandle(handleBounds.top);
+    },
+
+    controlbarHandleMouseUp(e) {
+        if ((e.type == "mouseup") && (e.button != 0)) return;
+
+        // mouseup and mousedown on the same place toggles the controlbar
+        if (UI.controlbarGrabbed && !UI.controlbarDrag) {
+            UI.toggleControlbar();
+            e.preventDefault();
+            e.stopPropagation();
+            UI.keepControlbar();
+            UI.activateControlbar();
+        }
+        UI.controlbarGrabbed = false;
+        UI.showControlbarHint(false);
+    },
+
+    controlbarHandleMouseDown(e) {
+        if ((e.type == "mousedown") && (e.button != 0)) return;
+
+        const ptr = getPointerEvent(e);
+
+        const handle = document.getElementById("noVNC_control_bar_handle");
+        const bounds = handle.getBoundingClientRect();
+
+        // Touch events have implicit capture
+        if (e.type === "mousedown") {
+            setCapture(handle);
+        }
+
+        UI.controlbarGrabbed = true;
+        UI.controlbarDrag = false;
+
+        UI.showControlbarHint(true);
+
+        UI.controlbarMouseDownClientY = ptr.clientY;
+        UI.controlbarMouseDownOffsetY = ptr.clientY - bounds.top;
+        e.preventDefault();
+        e.stopPropagation();
+        UI.keepControlbar();
+        UI.activateControlbar();
+    },
+
+    toggleExpander(e) {
+        if (this.classList.contains("noVNC_open")) {
+            this.classList.remove("noVNC_open");
+        } else {
+            this.classList.add("noVNC_open");
+        }
+    },
+
+/* ------^-------
+ *    /VISUAL
+ * ==============
+ *    SETTINGS
+ * ------v------*/
+
+    // Initial page load read/initialization of settings
+    initSetting(name, defVal) {
+        // Check Query string followed by cookie
+        let val = WebUtil.getConfigVar(name);
+        if (val === null) {
+            val = WebUtil.readSetting(name, defVal);
+        }
+        WebUtil.setSetting(name, val);
+        UI.updateSetting(name);
+        return val;
+    },
+
+    // Set the new value, update and disable form control setting
+    forceSetting(name, val) {
+        WebUtil.setSetting(name, val);
+        UI.updateSetting(name);
+        UI.disableSetting(name);
+    },
+
+    // Update cookie and form control setting. If value is not set, then
+    // updates from control to current cookie setting.
+    updateSetting(name) {
+
+        // Update the settings control
+        let value = UI.getSetting(name);
+
+        const ctrl = document.getElementById('noVNC_setting_' + name);
+        if (ctrl.type === 'checkbox') {
+            ctrl.checked = value;
+
+        } else if (typeof ctrl.options !== 'undefined') {
+            for (let i = 0; i < ctrl.options.length; i += 1) {
+                if (ctrl.options[i].value === value) {
+                    ctrl.selectedIndex = i;
+                    break;
+                }
+            }
+        } else {
+            ctrl.value = value;
+        }
+    },
+
+    // Save control setting to cookie
+    saveSetting(name) {
+        const ctrl = document.getElementById('noVNC_setting_' + name);
+        let val;
+        if (ctrl.type === 'checkbox') {
+            val = ctrl.checked;
+        } else if (typeof ctrl.options !== 'undefined') {
+            val = ctrl.options[ctrl.selectedIndex].value;
+        } else {
+            val = ctrl.value;
+        }
+        WebUtil.writeSetting(name, val);
+        //Log.Debug("Setting saved '" + name + "=" + val + "'");
+        return val;
+    },
+
+    // Read form control compatible setting from cookie
+    getSetting(name) {
+        const ctrl = document.getElementById('noVNC_setting_' + name);
+        let val = WebUtil.readSetting(name);
+        if (typeof val !== 'undefined' && val !== null && ctrl.type === 'checkbox') {
+            if (val.toString().toLowerCase() in {'0': 1, 'no': 1, 'false': 1}) {
+                val = false;
+            } else {
+                val = true;
+            }
+        }
+        return val;
+    },
+
+    // These helpers compensate for the lack of parent-selectors and
+    // previous-sibling-selectors in CSS which are needed when we want to
+    // disable the labels that belong to disabled input elements.
+    disableSetting(name) {
+        const ctrl = document.getElementById('noVNC_setting_' + name);
+        ctrl.disabled = true;
+        ctrl.label.classList.add('noVNC_disabled');
+    },
+
+    enableSetting(name) {
+        const ctrl = document.getElementById('noVNC_setting_' + name);
+        ctrl.disabled = false;
+        ctrl.label.classList.remove('noVNC_disabled');
+    },
+
+/* ------^-------
+ *   /SETTINGS
+ * ==============
+ *    PANELS
+ * ------v------*/
+
+    closeAllPanels() {
+        UI.closeSettingsPanel();
+        UI.closePowerPanel();
+        UI.closeClipboardPanel();
+        UI.closeExtraKeys();
+    },
+
+/* ------^-------
+ *   /PANELS
+ * ==============
+ * SETTINGS (panel)
+ * ------v------*/
+
+    openSettingsPanel() {
+        UI.closeAllPanels();
+        UI.openControlbar();
+
+        // Refresh UI elements from saved cookies
+        UI.updateSetting('encrypt');
+        UI.updateSetting('view_clip');
+        UI.updateSetting('resize');
+        UI.updateSetting('quality');
+        UI.updateSetting('compression');
+        UI.updateSetting('shared');
+        UI.updateSetting('view_only');
+        UI.updateSetting('path');
+        UI.updateSetting('repeaterID');
+        UI.updateSetting('logging');
+        UI.updateSetting('reconnect');
+        UI.updateSetting('reconnect_delay');
+
+        document.getElementById('noVNC_settings')
+            .classList.add("noVNC_open");
+        document.getElementById('noVNC_settings_button')
+            .classList.add("noVNC_selected");
+    },
+
+    closeSettingsPanel() {
+        document.getElementById('noVNC_settings')
+            .classList.remove("noVNC_open");
+        document.getElementById('noVNC_settings_button')
+            .classList.remove("noVNC_selected");
+    },
+
+    toggleSettingsPanel() {
+        if (document.getElementById('noVNC_settings')
+            .classList.contains("noVNC_open")) {
+            UI.closeSettingsPanel();
+        } else {
+            UI.openSettingsPanel();
+        }
+    },
+
+/* ------^-------
+ *   /SETTINGS
+ * ==============
+ *     POWER
+ * ------v------*/
+
+    openPowerPanel() {
+        UI.closeAllPanels();
+        UI.openControlbar();
+
+        document.getElementById('noVNC_power')
+            .classList.add("noVNC_open");
+        document.getElementById('noVNC_power_button')
+            .classList.add("noVNC_selected");
+    },
+
+    closePowerPanel() {
+        document.getElementById('noVNC_power')
+            .classList.remove("noVNC_open");
+        document.getElementById('noVNC_power_button')
+            .classList.remove("noVNC_selected");
+    },
+
+    togglePowerPanel() {
+        if (document.getElementById('noVNC_power')
+            .classList.contains("noVNC_open")) {
+            UI.closePowerPanel();
+        } else {
+            UI.openPowerPanel();
+        }
+    },
+
+    // Disable/enable power button
+    updatePowerButton() {
+        if (UI.connected &&
+            UI.rfb.capabilities.power &&
+            !UI.rfb.viewOnly) {
+            document.getElementById('noVNC_power_button')
+                .classList.remove("noVNC_hidden");
+        } else {
+            document.getElementById('noVNC_power_button')
+                .classList.add("noVNC_hidden");
+            // Close power panel if open
+            UI.closePowerPanel();
+        }
+    },
+
+/* ------^-------
+ *    /POWER
+ * ==============
+ *   CLIPBOARD
+ * ------v------*/
+
+    openClipboardPanel() {
+        UI.closeAllPanels();
+        UI.openControlbar();
+
+        document.getElementById('noVNC_clipboard')
+            .classList.add("noVNC_open");
+        document.getElementById('noVNC_clipboard_button')
+            .classList.add("noVNC_selected");
+    },
+
+    closeClipboardPanel() {
+        document.getElementById('noVNC_clipboard')
+            .classList.remove("noVNC_open");
+        document.getElementById('noVNC_clipboard_button')
+            .classList.remove("noVNC_selected");
+    },
+
+    toggleClipboardPanel() {
+        if (document.getElementById('noVNC_clipboard')
+            .classList.contains("noVNC_open")) {
+            UI.closeClipboardPanel();
+        } else {
+            UI.openClipboardPanel();
+        }
+    },
+
+    clipboardReceive(e) {
+        Log.Debug(">> UI.clipboardReceive: " + e.detail.text.substr(0, 40) + "...");
+        document.getElementById('noVNC_clipboard_text').value = e.detail.text;
+        Log.Debug("<< UI.clipboardReceive");
+    },
+
+    clipboardClear() {
+        document.getElementById('noVNC_clipboard_text').value = "";
+        UI.rfb.clipboardPasteFrom("");
+    },
+
+    clipboardSend() {
+        const text = document.getElementById('noVNC_clipboard_text').value;
+        Log.Debug(">> UI.clipboardSend: " + text.substr(0, 40) + "...");
+        UI.rfb.clipboardPasteFrom(text);
+        Log.Debug("<< UI.clipboardSend");
+    },
+
+/* ------^-------
+ *  /CLIPBOARD
+ * ==============
+ *  CONNECTION
+ * ------v------*/
+
+    openConnectPanel() {
+        document.getElementById('noVNC_connect_dlg')
+            .classList.add("noVNC_open");
+    },
+
+    closeConnectPanel() {
+        document.getElementById('noVNC_connect_dlg')
+            .classList.remove("noVNC_open");
+    },
+
+    connect(event, password) {
+
+        // Ignore when rfb already exists
+        if (typeof UI.rfb !== 'undefined') {
+            return;
+        }
+
+        const host = UI.getSetting('host');
+        const port = UI.getSetting('port');
+        const path = UI.getSetting('path');
+
+        if (typeof password === 'undefined') {
+            password = WebUtil.getConfigVar('password');
+            UI.reconnectPassword = password;
+        }
+
+        if (password === null) {
+            password = undefined;
+        }
+
+        UI.hideStatus();
+
+        if (!host) {
+            Log.Error("Can't connect when host is: " + host);
+            UI.showStatus(_("Must set host"), 'error');
+            return;
+        }
+
+        UI.closeConnectPanel();
+
+        UI.updateVisualState('connecting');
+
+        let url;
+
+        url = UI.getSetting('encrypt') ? 'wss' : 'ws';
+
+        url += '://' + host;
+        if (port) {
+            url += ':' + port;
+        }
+        url += '/' + path;
+
+        UI.rfb = new RFB(document.getElementById('noVNC_container'), url,
+                         { shared: UI.getSetting('shared'),
+                           repeaterID: UI.getSetting('repeaterID'),
+                           credentials: { password: password } });
+        UI.rfb.addEventListener("connect", UI.connectFinished);
+        UI.rfb.addEventListener("disconnect", UI.disconnectFinished);
+        UI.rfb.addEventListener("credentialsrequired", UI.credentials);
+        UI.rfb.addEventListener("securityfailure", UI.securityFailed);
+        UI.rfb.addEventListener("capabilities", UI.updatePowerButton);
+        UI.rfb.addEventListener("clipboard", UI.clipboardReceive);
+        UI.rfb.addEventListener("bell", UI.bell);
+        UI.rfb.addEventListener("desktopname", UI.updateDesktopName);
+        UI.rfb.clipViewport = UI.getSetting('view_clip');
+        UI.rfb.scaleViewport = UI.getSetting('resize') === 'scale';
+        UI.rfb.resizeSession = UI.getSetting('resize') === 'remote';
+        UI.rfb.qualityLevel = parseInt(UI.getSetting('quality'));
+        UI.rfb.compressionLevel = parseInt(UI.getSetting('compression'));
+        UI.rfb.showDotCursor = UI.getSetting('show_dot');
+
+        UI.updateViewOnly(); // requires UI.rfb
+    },
+
+    disconnect() {
+        UI.rfb.disconnect();
+
+        UI.connected = false;
+
+        // Disable automatic reconnecting
+        UI.inhibitReconnect = true;
+
+        UI.updateVisualState('disconnecting');
+
+        // Don't display the connection settings until we're actually disconnected
+    },
+
+    reconnect() {
+        UI.reconnectCallback = null;
+
+        // if reconnect has been disabled in the meantime, do nothing.
+        if (UI.inhibitReconnect) {
+            return;
+        }
+
+        UI.connect(null, UI.reconnectPassword);
+    },
+
+    cancelReconnect() {
+        if (UI.reconnectCallback !== null) {
+            clearTimeout(UI.reconnectCallback);
+            UI.reconnectCallback = null;
+        }
+
+        UI.updateVisualState('disconnected');
+
+        UI.openControlbar();
+        UI.openConnectPanel();
+    },
+
+    connectFinished(e) {
+        UI.connected = true;
+        UI.inhibitReconnect = false;
+
+        let msg;
+        if (UI.getSetting('encrypt')) {
+            msg = _("Connected (encrypted) to ") + UI.desktopName;
+        } else {
+            msg = _("Connected (unencrypted) to ") + UI.desktopName;
+        }
+        UI.showStatus(msg);
+        UI.updateVisualState('connected');
+
+        // Do this last because it can only be used on rendered elements
+        UI.rfb.focus();
+    },
+
+    disconnectFinished(e) {
+        const wasConnected = UI.connected;
+
+        // This variable is ideally set when disconnection starts, but
+        // when the disconnection isn't clean or if it is initiated by
+        // the server, we need to do it here as well since
+        // UI.disconnect() won't be used in those cases.
+        UI.connected = false;
+
+        UI.rfb = undefined;
+
+        if (!e.detail.clean) {
+            UI.updateVisualState('disconnected');
+            if (wasConnected) {
+                UI.showStatus(_("Something went wrong, connection is closed"),
+                              'error');
+            } else {
+                UI.showStatus(_("Failed to connect to server"), 'error');
+            }
+        } else if (UI.getSetting('reconnect', false) === true && !UI.inhibitReconnect) {
+            UI.updateVisualState('reconnecting');
+
+            const delay = parseInt(UI.getSetting('reconnect_delay'));
+            UI.reconnectCallback = setTimeout(UI.reconnect, delay);
+            return;
+        } else {
+            UI.updateVisualState('disconnected');
+            UI.showStatus(_("Disconnected"), 'normal');
+        }
+
+        document.title = PAGE_TITLE;
+
+        UI.openControlbar();
+        UI.openConnectPanel();
+    },
+
+    securityFailed(e) {
+        let msg = "";
+        // On security failures we might get a string with a reason
+        // directly from the server. Note that we can't control if
+        // this string is translated or not.
+        if ('reason' in e.detail) {
+            msg = _("New connection has been rejected with reason: ") +
+                e.detail.reason;
+        } else {
+            msg = _("New connection has been rejected");
+        }
+        UI.showStatus(msg, 'error');
+    },
+
+/* ------^-------
+ *  /CONNECTION
+ * ==============
+ *   PASSWORD
+ * ------v------*/
+
+    credentials(e) {
+        // FIXME: handle more types
+
+        document.getElementById("noVNC_username_block").classList.remove("noVNC_hidden");
+        document.getElementById("noVNC_password_block").classList.remove("noVNC_hidden");
+
+        let inputFocus = "none";
+        if (e.detail.types.indexOf("username") === -1) {
+            document.getElementById("noVNC_username_block").classList.add("noVNC_hidden");
+        } else {
+            inputFocus = inputFocus === "none" ? "noVNC_username_input" : inputFocus;
+        }
+        if (e.detail.types.indexOf("password") === -1) {
+            document.getElementById("noVNC_password_block").classList.add("noVNC_hidden");
+        } else {
+            inputFocus = inputFocus === "none" ? "noVNC_password_input" : inputFocus;
+        }
+        document.getElementById('noVNC_credentials_dlg')
+            .classList.add('noVNC_open');
+
+        setTimeout(() => document
+            .getElementById(inputFocus).focus(), 100);
+
+        Log.Warn("Server asked for credentials");
+        UI.showStatus(_("Credentials are required"), "warning");
+    },
+
+    setCredentials(e) {
+        // Prevent actually submitting the form
+        e.preventDefault();
+
+        let inputElemUsername = document.getElementById('noVNC_username_input');
+        const username = inputElemUsername.value;
+
+        let inputElemPassword = document.getElementById('noVNC_password_input');
+        const password = inputElemPassword.value;
+        // Clear the input after reading the password
+        inputElemPassword.value = "";
+
+        UI.rfb.sendCredentials({ username: username, password: password });
+        UI.reconnectPassword = password;
+        document.getElementById('noVNC_credentials_dlg')
+            .classList.remove('noVNC_open');
+    },
+
+/* ------^-------
+ *  /PASSWORD
+ * ==============
+ *   FULLSCREEN
+ * ------v------*/
+
+    toggleFullscreen() {
+        if (document.fullscreenElement || // alternative standard method
+            document.mozFullScreenElement || // currently working methods
+            document.webkitFullscreenElement ||
+            document.msFullscreenElement) {
+            if (document.exitFullscreen) {
+                document.exitFullscreen();
+            } else if (document.mozCancelFullScreen) {
+                document.mozCancelFullScreen();
+            } else if (document.webkitExitFullscreen) {
+                document.webkitExitFullscreen();
+            } else if (document.msExitFullscreen) {
+                document.msExitFullscreen();
+            }
+        } else {
+            if (document.documentElement.requestFullscreen) {
+                document.documentElement.requestFullscreen();
+            } else if (document.documentElement.mozRequestFullScreen) {
+                document.documentElement.mozRequestFullScreen();
+            } else if (document.documentElement.webkitRequestFullscreen) {
+                document.documentElement.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
+            } else if (document.body.msRequestFullscreen) {
+                document.body.msRequestFullscreen();
+            }
+        }
+        UI.updateFullscreenButton();
+    },
+
+    updateFullscreenButton() {
+        if (document.fullscreenElement || // alternative standard method
+            document.mozFullScreenElement || // currently working methods
+            document.webkitFullscreenElement ||
+            document.msFullscreenElement ) {
+            document.getElementById('noVNC_fullscreen_button')
+                .classList.add("noVNC_selected");
+        } else {
+            document.getElementById('noVNC_fullscreen_button')
+                .classList.remove("noVNC_selected");
+        }
+    },
+
+/* ------^-------
+ *  /FULLSCREEN
+ * ==============
+ *     RESIZE
+ * ------v------*/
+
+    // Apply remote resizing or local scaling
+    applyResizeMode() {
+        if (!UI.rfb) return;
+
+        UI.rfb.scaleViewport = UI.getSetting('resize') === 'scale';
+        UI.rfb.resizeSession = UI.getSetting('resize') === 'remote';
+    },
+
+/* ------^-------
+ *    /RESIZE
+ * ==============
+ * VIEW CLIPPING
+ * ------v------*/
+
+    // Update viewport clipping property for the connection. The normal
+    // case is to get the value from the setting. There are special cases
+    // for when the viewport is scaled or when a touch device is used.
+    updateViewClip() {
+        if (!UI.rfb) return;
+
+        const scaling = UI.getSetting('resize') === 'scale';
+
+        if (scaling) {
+            // Can't be clipping if viewport is scaled to fit
+            UI.forceSetting('view_clip', false);
+            UI.rfb.clipViewport  = false;
+        } else if (!hasScrollbarGutter) {
+            // Some platforms have scrollbars that are difficult
+            // to use in our case, so we always use our own panning
+            UI.forceSetting('view_clip', true);
+            UI.rfb.clipViewport = true;
+        } else {
+            UI.enableSetting('view_clip');
+            UI.rfb.clipViewport = UI.getSetting('view_clip');
+        }
+
+        // Changing the viewport may change the state of
+        // the dragging button
+        UI.updateViewDrag();
+    },
+
+/* ------^-------
+ * /VIEW CLIPPING
+ * ==============
+ *    VIEWDRAG
+ * ------v------*/
+
+    toggleViewDrag() {
+        if (!UI.rfb) return;
+
+        UI.rfb.dragViewport = !UI.rfb.dragViewport;
+        UI.updateViewDrag();
+    },
+
+    updateViewDrag() {
+        if (!UI.connected) return;
+
+        const viewDragButton = document.getElementById('noVNC_view_drag_button');
+
+        if (!UI.rfb.clipViewport && UI.rfb.dragViewport) {
+            // We are no longer clipping the viewport. Make sure
+            // viewport drag isn't active when it can't be used.
+            UI.rfb.dragViewport = false;
+        }
+
+        if (UI.rfb.dragViewport) {
+            viewDragButton.classList.add("noVNC_selected");
+        } else {
+            viewDragButton.classList.remove("noVNC_selected");
+        }
+
+        if (UI.rfb.clipViewport) {
+            viewDragButton.classList.remove("noVNC_hidden");
+        } else {
+            viewDragButton.classList.add("noVNC_hidden");
+        }
+    },
+
+/* ------^-------
+ *   /VIEWDRAG
+ * ==============
+ *    QUALITY
+ * ------v------*/
+
+    updateQuality() {
+        if (!UI.rfb) return;
+
+        UI.rfb.qualityLevel = parseInt(UI.getSetting('quality'));
+    },
+
+/* ------^-------
+ *   /QUALITY
+ * ==============
+ *  COMPRESSION
+ * ------v------*/
+
+    updateCompression() {
+        if (!UI.rfb) return;
+
+        UI.rfb.compressionLevel = parseInt(UI.getSetting('compression'));
+    },
+
+/* ------^-------
+ *  /COMPRESSION
+ * ==============
+ *    KEYBOARD
+ * ------v------*/
+
+    showVirtualKeyboard() {
+        if (!isTouchDevice) return;
+
+        const input = document.getElementById('noVNC_keyboardinput');
+
+        if (document.activeElement == input) return;
+
+        input.focus();
+
+        try {
+            const l = input.value.length;
+            // Move the caret to the end
+            input.setSelectionRange(l, l);
+        } catch (err) {
+            // setSelectionRange is undefined in Google Chrome
+        }
+    },
+
+    hideVirtualKeyboard() {
+        if (!isTouchDevice) return;
+
+        const input = document.getElementById('noVNC_keyboardinput');
+
+        if (document.activeElement != input) return;
+
+        input.blur();
+    },
+
+    toggleVirtualKeyboard() {
+        if (document.getElementById('noVNC_keyboard_button')
+            .classList.contains("noVNC_selected")) {
+            UI.hideVirtualKeyboard();
+        } else {
+            UI.showVirtualKeyboard();
+        }
+    },
+
+    onfocusVirtualKeyboard(event) {
+        document.getElementById('noVNC_keyboard_button')
+            .classList.add("noVNC_selected");
+        if (UI.rfb) {
+            UI.rfb.focusOnClick = false;
+        }
+    },
+
+    onblurVirtualKeyboard(event) {
+        document.getElementById('noVNC_keyboard_button')
+            .classList.remove("noVNC_selected");
+        if (UI.rfb) {
+            UI.rfb.focusOnClick = true;
+        }
+    },
+
+    keepVirtualKeyboard(event) {
+        const input = document.getElementById('noVNC_keyboardinput');
+
+        // Only prevent focus change if the virtual keyboard is active
+        if (document.activeElement != input) {
+            return;
+        }
+
+        // Only allow focus to move to other elements that need
+        // focus to function properly
+        if (event.target.form !== undefined) {
+            switch (event.target.type) {
+                case 'text':
+                case 'email':
+                case 'search':
+                case 'password':
+                case 'tel':
+                case 'url':
+                case 'textarea':
+                case 'select-one':
+                case 'select-multiple':
+                    return;
+            }
+        }
+
+        event.preventDefault();
+    },
+
+    keyboardinputReset() {
+        const kbi = document.getElementById('noVNC_keyboardinput');
+        kbi.value = new Array(UI.defaultKeyboardinputLen).join("_");
+        UI.lastKeyboardinput = kbi.value;
+    },
+
+    keyEvent(keysym, code, down) {
+        if (!UI.rfb) return;
+
+        UI.rfb.sendKey(keysym, code, down);
+    },
+
+    // When normal keyboard events are left uncought, use the input events from
+    // the keyboardinput element instead and generate the corresponding key events.
+    // This code is required since some browsers on Android are inconsistent in
+    // sending keyCodes in the normal keyboard events when using on screen keyboards.
+    keyInput(event) {
+
+        if (!UI.rfb) return;
+
+        const newValue = event.target.value;
+
+        if (!UI.lastKeyboardinput) {
+            UI.keyboardinputReset();
+        }
+        const oldValue = UI.lastKeyboardinput;
+
+        let newLen;
+        try {
+            // Try to check caret position since whitespace at the end
+            // will not be considered by value.length in some browsers
+            newLen = Math.max(event.target.selectionStart, newValue.length);
+        } catch (err) {
+            // selectionStart is undefined in Google Chrome
+            newLen = newValue.length;
+        }
+        const oldLen = oldValue.length;
+
+        let inputs = newLen - oldLen;
+        let backspaces = inputs < 0 ? -inputs : 0;
+
+        // Compare the old string with the new to account for
+        // text-corrections or other input that modify existing text
+        for (let i = 0; i < Math.min(oldLen, newLen); i++) {
+            if (newValue.charAt(i) != oldValue.charAt(i)) {
+                inputs = newLen - i;
+                backspaces = oldLen - i;
+                break;
+            }
+        }
+
+        // Send the key events
+        for (let i = 0; i < backspaces; i++) {
+            UI.rfb.sendKey(KeyTable.XK_BackSpace, "Backspace");
+        }
+        for (let i = newLen - inputs; i < newLen; i++) {
+            UI.rfb.sendKey(keysyms.lookup(newValue.charCodeAt(i)));
+        }
+
+        // Control the text content length in the keyboardinput element
+        if (newLen > 2 * UI.defaultKeyboardinputLen) {
+            UI.keyboardinputReset();
+        } else if (newLen < 1) {
+            // There always have to be some text in the keyboardinput
+            // element with which backspace can interact.
+            UI.keyboardinputReset();
+            // This sometimes causes the keyboard to disappear for a second
+            // but it is required for the android keyboard to recognize that
+            // text has been added to the field
+            event.target.blur();
+            // This has to be ran outside of the input handler in order to work
+            setTimeout(event.target.focus.bind(event.target), 0);
+        } else {
+            UI.lastKeyboardinput = newValue;
+        }
+    },
+
+/* ------^-------
+ *   /KEYBOARD
+ * ==============
+ *   EXTRA KEYS
+ * ------v------*/
+
+    openExtraKeys() {
+        UI.closeAllPanels();
+        UI.openControlbar();
+
+        document.getElementById('noVNC_modifiers')
+            .classList.add("noVNC_open");
+        document.getElementById('noVNC_toggle_extra_keys_button')
+            .classList.add("noVNC_selected");
+    },
+
+    closeExtraKeys() {
+        document.getElementById('noVNC_modifiers')
+            .classList.remove("noVNC_open");
+        document.getElementById('noVNC_toggle_extra_keys_button')
+            .classList.remove("noVNC_selected");
+    },
+
+    toggleExtraKeys() {
+        if (document.getElementById('noVNC_modifiers')
+            .classList.contains("noVNC_open")) {
+            UI.closeExtraKeys();
+        } else  {
+            UI.openExtraKeys();
+        }
+    },
+
+    sendEsc() {
+        UI.sendKey(KeyTable.XK_Escape, "Escape");
+    },
+
+    sendTab() {
+        UI.sendKey(KeyTable.XK_Tab, "Tab");
+    },
+
+    toggleCtrl() {
+        const btn = document.getElementById('noVNC_toggle_ctrl_button');
+        if (btn.classList.contains("noVNC_selected")) {
+            UI.sendKey(KeyTable.XK_Control_L, "ControlLeft", false);
+            btn.classList.remove("noVNC_selected");
+        } else {
+            UI.sendKey(KeyTable.XK_Control_L, "ControlLeft", true);
+            btn.classList.add("noVNC_selected");
+        }
+    },
+
+    toggleWindows() {
+        const btn = document.getElementById('noVNC_toggle_windows_button');
+        if (btn.classList.contains("noVNC_selected")) {
+            UI.sendKey(KeyTable.XK_Super_L, "MetaLeft", false);
+            btn.classList.remove("noVNC_selected");
+        } else {
+            UI.sendKey(KeyTable.XK_Super_L, "MetaLeft", true);
+            btn.classList.add("noVNC_selected");
+        }
+    },
+
+    toggleAlt() {
+        const btn = document.getElementById('noVNC_toggle_alt_button');
+        if (btn.classList.contains("noVNC_selected")) {
+            UI.sendKey(KeyTable.XK_Alt_L, "AltLeft", false);
+            btn.classList.remove("noVNC_selected");
+        } else {
+            UI.sendKey(KeyTable.XK_Alt_L, "AltLeft", true);
+            btn.classList.add("noVNC_selected");
+        }
+    },
+
+    sendCtrlAltDel() {
+        UI.rfb.sendCtrlAltDel();
+        // See below
+        UI.rfb.focus();
+        UI.idleControlbar();
+    },
+
+    sendKey(keysym, code, down) {
+        UI.rfb.sendKey(keysym, code, down);
+
+        // Move focus to the screen in order to be able to use the
+        // keyboard right after these extra keys.
+        // The exception is when a virtual keyboard is used, because
+        // if we focus the screen the virtual keyboard would be closed.
+        // In this case we focus our special virtual keyboard input
+        // element instead.
+        if (document.getElementById('noVNC_keyboard_button')
+            .classList.contains("noVNC_selected")) {
+            document.getElementById('noVNC_keyboardinput').focus();
+        } else {
+            UI.rfb.focus();
+        }
+        // fade out the controlbar to highlight that
+        // the focus has been moved to the screen
+        UI.idleControlbar();
+    },
+
+/* ------^-------
+ *   /EXTRA KEYS
+ * ==============
+ *     MISC
+ * ------v------*/
+
+    updateViewOnly() {
+        if (!UI.rfb) return;
+        UI.rfb.viewOnly = UI.getSetting('view_only');
+
+        // Hide input related buttons in view only mode
+        if (UI.rfb.viewOnly) {
+            document.getElementById('noVNC_keyboard_button')
+                .classList.add('noVNC_hidden');
+            document.getElementById('noVNC_toggle_extra_keys_button')
+                .classList.add('noVNC_hidden');
+            document.getElementById('noVNC_clipboard_button')
+                .classList.add('noVNC_hidden');
+        } else {
+            document.getElementById('noVNC_keyboard_button')
+                .classList.remove('noVNC_hidden');
+            document.getElementById('noVNC_toggle_extra_keys_button')
+                .classList.remove('noVNC_hidden');
+            document.getElementById('noVNC_clipboard_button')
+                .classList.remove('noVNC_hidden');
+        }
+    },
+
+    updateShowDotCursor() {
+        if (!UI.rfb) return;
+        UI.rfb.showDotCursor = UI.getSetting('show_dot');
+    },
+
+    updateLogging() {
+        WebUtil.initLogging(UI.getSetting('logging'));
+    },
+
+    updateDesktopName(e) {
+        UI.desktopName = e.detail.name;
+        // Display the desktop name in the document title
+        document.title = e.detail.name + " - " + PAGE_TITLE;
+    },
+
+    bell(e) {
+        if (WebUtil.getConfigVar('bell', 'on') === 'on') {
+            const promise = document.getElementById('noVNC_bell').play();
+            // The standards disagree on the return value here
+            if (promise) {
+                promise.catch((e) => {
+                    if (e.name === "NotAllowedError") {
+                        // Ignore when the browser doesn't let us play audio.
+                        // It is common that the browsers require audio to be
+                        // initiated from a user action.
+                    } else {
+                        Log.Error("Unable to play bell: " + e);
+                    }
+                });
+            }
+        }
+    },
+
+    //Helper to add options to dropdown.
+    addOption(selectbox, text, value) {
+        const optn = document.createElement("OPTION");
+        optn.text = text;
+        optn.value = value;
+        selectbox.options.add(optn);
+    },
+
+/* ------^-------
+ *    /MISC
+ * ==============
+ */
+};
+
+// Set up translations
+const LINGUAS = ["cs", "de", "el", "es", "fr", "ja", "ko", "nl", "pl", "pt_BR", "ru", "sv", "tr", "zh_CN", "zh_TW"];
+l10n.setup(LINGUAS);
+if (l10n.language === "en" || l10n.dictionary !== undefined) {
+    UI.prime();
+} else {
+    fetch('app/locale/' + l10n.language + '.json')
+        .then((response) => {
+            if (!response.ok) {
+                throw Error("" + response.status + " " + response.statusText);
+            }
+            return response.json();
+        })
+        .then((translations) => { l10n.dictionary = translations; })
+        .catch(err => Log.Error("Failed to load translations: " + err))
+        .then(UI.prime);
+}
+
+export default UI;

static/novnc/app/webutil.js

@@ -0,0 +1,186 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+import { initLogging as mainInitLogging } from '../core/util/logging.js';
+
+// init log level reading the logging HTTP param
+export function initLogging(level) {
+    "use strict";
+    if (typeof level !== "undefined") {
+        mainInitLogging(level);
+    } else {
+        const param = document.location.href.match(/logging=([A-Za-z0-9._-]*)/);
+        mainInitLogging(param || undefined);
+    }
+}
+
+// Read a query string variable
+// A URL with a query parameter can look like this (But will most probably get logged on the http server):
+// https://www.example.com?myqueryparam=myvalue
+//
+// For privacy (Using a hastag #, the parameters will not be sent to the server)
+// the url can be requested in the following way:
+// https://www.example.com#myqueryparam=myvalue&password=secreatvalue
+//
+// Even Mixing public and non public parameters will work:
+// https://www.example.com?nonsecretparam=example.com#password=secreatvalue
+export function getQueryVar(name, defVal) {
+    "use strict";
+    const re = new RegExp('.*[?&]' + name + '=([^&#]*)'),
+        match = ''.concat(document.location.href, window.location.hash).match(re);
+    if (typeof defVal === 'undefined') { defVal = null; }
+
+    if (match) {
+        return decodeURIComponent(match[1]);
+    }
+
+    return defVal;
+}
+
+// Read a hash fragment variable
+export function getHashVar(name, defVal) {
+    "use strict";
+    const re = new RegExp('.*[&#]' + name + '=([^&]*)'),
+        match = document.location.hash.match(re);
+    if (typeof defVal === 'undefined') { defVal = null; }
+
+    if (match) {
+        return decodeURIComponent(match[1]);
+    }
+
+    return defVal;
+}
+
+// Read a variable from the fragment or the query string
+// Fragment takes precedence
+export function getConfigVar(name, defVal) {
+    "use strict";
+    const val = getHashVar(name);
+
+    if (val === null) {
+        return getQueryVar(name, defVal);
+    }
+
+    return val;
+}
+
+/*
+ * Cookie handling. Dervied from: http://www.quirksmode.org/js/cookies.html
+ */
+
+// No days means only for this browser session
+export function createCookie(name, value, days) {
+    "use strict";
+    let date, expires;
+    if (days) {
+        date = new Date();
+        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
+        expires = "; expires=" + date.toGMTString();
+    } else {
+        expires = "";
+    }
+
+    let secure;
+    if (document.location.protocol === "https:") {
+        secure = "; secure";
+    } else {
+        secure = "";
+    }
+    document.cookie = name + "=" + value + expires + "; path=/" + secure;
+}
+
+export function readCookie(name, defaultValue) {
+    "use strict";
+    const nameEQ = name + "=";
+    const ca = document.cookie.split(';');
+
+    for (let i = 0; i < ca.length; i += 1) {
+        let c = ca[i];
+        while (c.charAt(0) === ' ') {
+            c = c.substring(1, c.length);
+        }
+        if (c.indexOf(nameEQ) === 0) {
+            return c.substring(nameEQ.length, c.length);
+        }
+    }
+
+    return (typeof defaultValue !== 'undefined') ? defaultValue : null;
+}
+
+export function eraseCookie(name) {
+    "use strict";
+    createCookie(name, "", -1);
+}
+
+/*
+ * Setting handling.
+ */
+
+let settings = {};
+
+export function initSettings() {
+    if (!window.chrome || !window.chrome.storage) {
+        settings = {};
+        return Promise.resolve();
+    }
+
+    return new Promise(resolve => window.chrome.storage.sync.get(resolve))
+        .then((cfg) => { settings = cfg; });
+}
+
+// Update the settings cache, but do not write to permanent storage
+export function setSetting(name, value) {
+    settings[name] = value;
+}
+
+// No days means only for this browser session
+export function writeSetting(name, value) {
+    "use strict";
+    if (settings[name] === value) return;
+    settings[name] = value;
+    if (window.chrome && window.chrome.storage) {
+        window.chrome.storage.sync.set(settings);
+    } else {
+        localStorage.setItem(name, value);
+    }
+}
+
+export function readSetting(name, defaultValue) {
+    "use strict";
+    let value;
+    if ((name in settings) || (window.chrome && window.chrome.storage)) {
+        value = settings[name];
+    } else {
+        value = localStorage.getItem(name);
+        settings[name] = value;
+    }
+    if (typeof value === "undefined") {
+        value = null;
+    }
+
+    if (value === null && typeof defaultValue !== "undefined") {
+        return defaultValue;
+    }
+
+    return value;
+}
+
+export function eraseSetting(name) {
+    "use strict";
+    // Deleting here means that next time the setting is read when using local
+    // storage, it will be pulled from local storage again.
+    // If the setting in local storage is changed (e.g. in another tab)
+    // between this delete and the next read, it could lead to an unexpected
+    // value change.
+    delete settings[name];
+    if (window.chrome && window.chrome.storage) {
+        window.chrome.storage.sync.remove(name);
+    } else {
+        localStorage.removeItem(name);
+    }
+}

static/novnc/core/base64.js

@@ -0,0 +1,104 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// From: http://hg.mozilla.org/mozilla-central/raw-file/ec10630b1a54/js/src/devtools/jint/sunspider/string-base64.js
+
+import * as Log from './util/logging.js';
+
+export default {
+    /* Convert data (an array of integers) to a Base64 string. */
+    toBase64Table: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='.split(''),
+    base64Pad: '=',
+
+    encode(data) {
+        "use strict";
+        let result = '';
+        const length = data.length;
+        const lengthpad = (length % 3);
+        // Convert every three bytes to 4 ascii characters.
+
+        for (let i = 0; i < (length - 2); i += 3) {
+            result += this.toBase64Table[data[i] >> 2];
+            result += this.toBase64Table[((data[i] & 0x03) << 4) + (data[i + 1] >> 4)];
+            result += this.toBase64Table[((data[i + 1] & 0x0f) << 2) + (data[i + 2] >> 6)];
+            result += this.toBase64Table[data[i + 2] & 0x3f];
+        }
+
+        // Convert the remaining 1 or 2 bytes, pad out to 4 characters.
+        const j = length - lengthpad;
+        if (lengthpad === 2) {
+            result += this.toBase64Table[data[j] >> 2];
+            result += this.toBase64Table[((data[j] & 0x03) << 4) + (data[j + 1] >> 4)];
+            result += this.toBase64Table[(data[j + 1] & 0x0f) << 2];
+            result += this.toBase64Table[64];
+        } else if (lengthpad === 1) {
+            result += this.toBase64Table[data[j] >> 2];
+            result += this.toBase64Table[(data[j] & 0x03) << 4];
+            result += this.toBase64Table[64];
+            result += this.toBase64Table[64];
+        }
+
+        return result;
+    },
+
+    /* Convert Base64 data to a string */
+    /* eslint-disable comma-spacing */
+    toBinaryTable: [
+        -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
+        -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
+        -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63,
+        52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1, 0,-1,-1,
+        -1, 0, 1, 2,  3, 4, 5, 6,  7, 8, 9,10, 11,12,13,14,
+        15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1,
+        -1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
+        41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1
+    ],
+    /* eslint-enable comma-spacing */
+
+    decode(data, offset = 0) {
+        let dataLength = data.indexOf('=') - offset;
+        if (dataLength < 0) { dataLength = data.length - offset; }
+
+        /* Every four characters is 3 resulting numbers */
+        const resultLength = (dataLength >> 2) * 3 + Math.floor((dataLength % 4) / 1.5);
+        const result = new Array(resultLength);
+
+        // Convert one by one.
+
+        let leftbits = 0; // number of bits decoded, but yet to be appended
+        let leftdata = 0; // bits decoded, but yet to be appended
+        for (let idx = 0, i = offset; i < data.length; i++) {
+            const c = this.toBinaryTable[data.charCodeAt(i) & 0x7f];
+            const padding = (data.charAt(i) === this.base64Pad);
+            // Skip illegal characters and whitespace
+            if (c === -1) {
+                Log.Error("Illegal character code " + data.charCodeAt(i) + " at position " + i);
+                continue;
+            }
+
+            // Collect data into leftdata, update bitcount
+            leftdata = (leftdata << 6) | c;
+            leftbits += 6;
+
+            // If we have 8 or more bits, append 8 bits to the result
+            if (leftbits >= 8) {
+                leftbits -= 8;
+                // Append if not padding.
+                if (!padding) {
+                    result[idx++] = (leftdata >> leftbits) & 0xff;
+                }
+                leftdata &= (1 << leftbits) - 1;
+            }
+        }
+
+        // If there are any bits left, the base64 string was corrupted
+        if (leftbits) {
+            const err = new Error('Corrupted base64 string');
+            err.name = 'Base64-Error';
+            throw err;
+        }
+
+        return result;
+    }
+}; /* End of Base64 namespace */

static/novnc/core/decoders/copyrect.js

@@ -0,0 +1,27 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ *
+ */
+
+export default class CopyRectDecoder {
+    decodeRect(x, y, width, height, sock, display, depth) {
+        if (sock.rQwait("COPYRECT", 4)) {
+            return false;
+        }
+
+        let deltaX = sock.rQshift16();
+        let deltaY = sock.rQshift16();
+
+        if ((width === 0) || (height === 0)) {
+            return true;
+        }
+
+        display.copyImage(deltaX, deltaY, x, y, width, height);
+
+        return true;
+    }
+}

static/novnc/core/decoders/hextile.js

@@ -0,0 +1,191 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ *
+ */
+
+import * as Log from '../util/logging.js';
+
+export default class HextileDecoder {
+    constructor() {
+        this._tiles = 0;
+        this._lastsubencoding = 0;
+        this._tileBuffer = new Uint8Array(16 * 16 * 4);
+    }
+
+    decodeRect(x, y, width, height, sock, display, depth) {
+        if (this._tiles === 0) {
+            this._tilesX = Math.ceil(width / 16);
+            this._tilesY = Math.ceil(height / 16);
+            this._totalTiles = this._tilesX * this._tilesY;
+            this._tiles = this._totalTiles;
+        }
+
+        while (this._tiles > 0) {
+            let bytes = 1;
+
+            if (sock.rQwait("HEXTILE", bytes)) {
+                return false;
+            }
+
+            let rQ = sock.rQ;
+            let rQi = sock.rQi;
+
+            let subencoding = rQ[rQi];  // Peek
+            if (subencoding > 30) {  // Raw
+                throw new Error("Illegal hextile subencoding (subencoding: " +
+                            subencoding + ")");
+            }
+
+            const currTile = this._totalTiles - this._tiles;
+            const tileX = currTile % this._tilesX;
+            const tileY = Math.floor(currTile / this._tilesX);
+            const tx = x + tileX * 16;
+            const ty = y + tileY * 16;
+            const tw = Math.min(16, (x + width) - tx);
+            const th = Math.min(16, (y + height) - ty);
+
+            // Figure out how much we are expecting
+            if (subencoding & 0x01) {  // Raw
+                bytes += tw * th * 4;
+            } else {
+                if (subencoding & 0x02) {  // Background
+                    bytes += 4;
+                }
+                if (subencoding & 0x04) {  // Foreground
+                    bytes += 4;
+                }
+                if (subencoding & 0x08) {  // AnySubrects
+                    bytes++;  // Since we aren't shifting it off
+
+                    if (sock.rQwait("HEXTILE", bytes)) {
+                        return false;
+                    }
+
+                    let subrects = rQ[rQi + bytes - 1];  // Peek
+                    if (subencoding & 0x10) {  // SubrectsColoured
+                        bytes += subrects * (4 + 2);
+                    } else {
+                        bytes += subrects * 2;
+                    }
+                }
+            }
+
+            if (sock.rQwait("HEXTILE", bytes)) {
+                return false;
+            }
+
+            // We know the encoding and have a whole tile
+            rQi++;
+            if (subencoding === 0) {
+                if (this._lastsubencoding & 0x01) {
+                    // Weird: ignore blanks are RAW
+                    Log.Debug("     Ignoring blank after RAW");
+                } else {
+                    display.fillRect(tx, ty, tw, th, this._background);
+                }
+            } else if (subencoding & 0x01) {  // Raw
+                let pixels = tw * th;
+                // Max sure the image is fully opaque
+                for (let i = 0;i <  pixels;i++) {
+                    rQ[rQi + i * 4 + 3] = 255;
+                }
+                display.blitImage(tx, ty, tw, th, rQ, rQi);
+                rQi += bytes - 1;
+            } else {
+                if (subencoding & 0x02) {  // Background
+                    this._background = [rQ[rQi], rQ[rQi + 1], rQ[rQi + 2], rQ[rQi + 3]];
+                    rQi += 4;
+                }
+                if (subencoding & 0x04) {  // Foreground
+                    this._foreground = [rQ[rQi], rQ[rQi + 1], rQ[rQi + 2], rQ[rQi + 3]];
+                    rQi += 4;
+                }
+
+                this._startTile(tx, ty, tw, th, this._background);
+                if (subencoding & 0x08) {  // AnySubrects
+                    let subrects = rQ[rQi];
+                    rQi++;
+
+                    for (let s = 0; s < subrects; s++) {
+                        let color;
+                        if (subencoding & 0x10) {  // SubrectsColoured
+                            color = [rQ[rQi], rQ[rQi + 1], rQ[rQi + 2], rQ[rQi + 3]];
+                            rQi += 4;
+                        } else {
+                            color = this._foreground;
+                        }
+                        const xy = rQ[rQi];
+                        rQi++;
+                        const sx = (xy >> 4);
+                        const sy = (xy & 0x0f);
+
+                        const wh = rQ[rQi];
+                        rQi++;
+                        const sw = (wh >> 4) + 1;
+                        const sh = (wh & 0x0f) + 1;
+
+                        this._subTile(sx, sy, sw, sh, color);
+                    }
+                }
+                this._finishTile(display);
+            }
+            sock.rQi = rQi;
+            this._lastsubencoding = subencoding;
+            this._tiles--;
+        }
+
+        return true;
+    }
+
+    // start updating a tile
+    _startTile(x, y, width, height, color) {
+        this._tileX = x;
+        this._tileY = y;
+        this._tileW = width;
+        this._tileH = height;
+
+        const red = color[0];
+        const green = color[1];
+        const blue = color[2];
+
+        const data = this._tileBuffer;
+        for (let i = 0; i < width * height * 4; i += 4) {
+            data[i]     = red;
+            data[i + 1] = green;
+            data[i + 2] = blue;
+            data[i + 3] = 255;
+        }
+    }
+
+    // update sub-rectangle of the current tile
+    _subTile(x, y, w, h, color) {
+        const red = color[0];
+        const green = color[1];
+        const blue = color[2];
+        const xend = x + w;
+        const yend = y + h;
+
+        const data = this._tileBuffer;
+        const width = this._tileW;
+        for (let j = y; j < yend; j++) {
+            for (let i = x; i < xend; i++) {
+                const p = (i + (j * width)) * 4;
+                data[p]     = red;
+                data[p + 1] = green;
+                data[p + 2] = blue;
+                data[p + 3] = 255;
+            }
+        }
+    }
+
+    // draw the current tile to the screen
+    _finishTile(display) {
+        display.blitImage(this._tileX, this._tileY,
+                          this._tileW, this._tileH,
+                          this._tileBuffer, 0);
+    }
+}

static/novnc/core/decoders/raw.js

@@ -0,0 +1,66 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ *
+ */
+
+export default class RawDecoder {
+    constructor() {
+        this._lines = 0;
+    }
+
+    decodeRect(x, y, width, height, sock, display, depth) {
+        if ((width === 0) || (height === 0)) {
+            return true;
+        }
+
+        if (this._lines === 0) {
+            this._lines = height;
+        }
+
+        const pixelSize = depth == 8 ? 1 : 4;
+        const bytesPerLine = width * pixelSize;
+
+        if (sock.rQwait("RAW", bytesPerLine)) {
+            return false;
+        }
+
+        const curY = y + (height - this._lines);
+        const currHeight = Math.min(this._lines,
+                                    Math.floor(sock.rQlen / bytesPerLine));
+        const pixels = width * currHeight;
+
+        let data = sock.rQ;
+        let index = sock.rQi;
+
+        // Convert data if needed
+        if (depth == 8) {
+            const newdata = new Uint8Array(pixels * 4);
+            for (let i = 0; i < pixels; i++) {
+                newdata[i * 4 + 0] = ((data[index + i] >> 0) & 0x3) * 255 / 3;
+                newdata[i * 4 + 1] = ((data[index + i] >> 2) & 0x3) * 255 / 3;
+                newdata[i * 4 + 2] = ((data[index + i] >> 4) & 0x3) * 255 / 3;
+                newdata[i * 4 + 3] = 255;
+            }
+            data = newdata;
+            index = 0;
+        }
+
+        // Max sure the image is fully opaque
+        for (let i = 0; i < pixels; i++) {
+            data[i * 4 + 3] = 255;
+        }
+
+        display.blitImage(x, curY, width, currHeight, data, index);
+        sock.rQskipBytes(currHeight * bytesPerLine);
+        this._lines -= currHeight;
+        if (this._lines > 0) {
+            return false;
+        }
+
+        return true;
+    }
+}

static/novnc/core/decoders/rre.js

@@ -0,0 +1,44 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ *
+ */
+
+export default class RREDecoder {
+    constructor() {
+        this._subrects = 0;
+    }
+
+    decodeRect(x, y, width, height, sock, display, depth) {
+        if (this._subrects === 0) {
+            if (sock.rQwait("RRE", 4 + 4)) {
+                return false;
+            }
+
+            this._subrects = sock.rQshift32();
+
+            let color = sock.rQshiftBytes(4);  // Background
+            display.fillRect(x, y, width, height, color);
+        }
+
+        while (this._subrects > 0) {
+            if (sock.rQwait("RRE", 4 + 8)) {
+                return false;
+            }
+
+            let color = sock.rQshiftBytes(4);
+            let sx = sock.rQshift16();
+            let sy = sock.rQshift16();
+            let swidth = sock.rQshift16();
+            let sheight = sock.rQshift16();
+            display.fillRect(x + sx, y + sy, swidth, sheight, color);
+
+            this._subrects--;
+        }
+
+        return true;
+    }
+}

static/novnc/core/decoders/tight.js

@@ -0,0 +1,331 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * (c) 2012 Michael Tinglof, Joe Balaz, Les Piech (Mercuri.ca)
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ *
+ */
+
+import * as Log from '../util/logging.js';
+import Inflator from "../inflator.js";
+
+export default class TightDecoder {
+    constructor() {
+        this._ctl = null;
+        this._filter = null;
+        this._numColors = 0;
+        this._palette = new Uint8Array(1024);  // 256 * 4 (max palette size * max bytes-per-pixel)
+        this._len = 0;
+
+        this._zlibs = [];
+        for (let i = 0; i < 4; i++) {
+            this._zlibs[i] = new Inflator();
+        }
+    }
+
+    decodeRect(x, y, width, height, sock, display, depth) {
+        if (this._ctl === null) {
+            if (sock.rQwait("TIGHT compression-control", 1)) {
+                return false;
+            }
+
+            this._ctl = sock.rQshift8();
+
+            // Reset streams if the server requests it
+            for (let i = 0; i < 4; i++) {
+                if ((this._ctl >> i) & 1) {
+                    this._zlibs[i].reset();
+                    Log.Info("Reset zlib stream " + i);
+                }
+            }
+
+            // Figure out filter
+            this._ctl = this._ctl >> 4;
+        }
+
+        let ret;
+
+        if (this._ctl === 0x08) {
+            ret = this._fillRect(x, y, width, height,
+                                 sock, display, depth);
+        } else if (this._ctl === 0x09) {
+            ret = this._jpegRect(x, y, width, height,
+                                 sock, display, depth);
+        } else if (this._ctl === 0x0A) {
+            ret = this._pngRect(x, y, width, height,
+                                sock, display, depth);
+        } else if ((this._ctl & 0x08) == 0) {
+            ret = this._basicRect(this._ctl, x, y, width, height,
+                                  sock, display, depth);
+        } else {
+            throw new Error("Illegal tight compression received (ctl: " +
+                                   this._ctl + ")");
+        }
+
+        if (ret) {
+            this._ctl = null;
+        }
+
+        return ret;
+    }
+
+    _fillRect(x, y, width, height, sock, display, depth) {
+        if (sock.rQwait("TIGHT", 3)) {
+            return false;
+        }
+
+        const rQi = sock.rQi;
+        const rQ = sock.rQ;
+
+        display.fillRect(x, y, width, height,
+                         [rQ[rQi], rQ[rQi + 1], rQ[rQi + 2]], false);
+        sock.rQskipBytes(3);
+
+        return true;
+    }
+
+    _jpegRect(x, y, width, height, sock, display, depth) {
+        let data = this._readData(sock);
+        if (data === null) {
+            return false;
+        }
+
+        display.imageRect(x, y, width, height, "image/jpeg", data);
+
+        return true;
+    }
+
+    _pngRect(x, y, width, height, sock, display, depth) {
+        throw new Error("PNG received in standard Tight rect");
+    }
+
+    _basicRect(ctl, x, y, width, height, sock, display, depth) {
+        if (this._filter === null) {
+            if (ctl & 0x4) {
+                if (sock.rQwait("TIGHT", 1)) {
+                    return false;
+                }
+
+                this._filter = sock.rQshift8();
+            } else {
+                // Implicit CopyFilter
+                this._filter = 0;
+            }
+        }
+
+        let streamId = ctl & 0x3;
+
+        let ret;
+
+        switch (this._filter) {
+            case 0: // CopyFilter
+                ret = this._copyFilter(streamId, x, y, width, height,
+                                       sock, display, depth);
+                break;
+            case 1: // PaletteFilter
+                ret = this._paletteFilter(streamId, x, y, width, height,
+                                          sock, display, depth);
+                break;
+            case 2: // GradientFilter
+                ret = this._gradientFilter(streamId, x, y, width, height,
+                                           sock, display, depth);
+                break;
+            default:
+                throw new Error("Illegal tight filter received (ctl: " +
+                                       this._filter + ")");
+        }
+
+        if (ret) {
+            this._filter = null;
+        }
+
+        return ret;
+    }
+
+    _copyFilter(streamId, x, y, width, height, sock, display, depth) {
+        const uncompressedSize = width * height * 3;
+        let data;
+
+        if (uncompressedSize === 0) {
+            return true;
+        }
+
+        if (uncompressedSize < 12) {
+            if (sock.rQwait("TIGHT", uncompressedSize)) {
+                return false;
+            }
+
+            data = sock.rQshiftBytes(uncompressedSize);
+        } else {
+            data = this._readData(sock);
+            if (data === null) {
+                return false;
+            }
+
+            this._zlibs[streamId].setInput(data);
+            data = this._zlibs[streamId].inflate(uncompressedSize);
+            this._zlibs[streamId].setInput(null);
+        }
+
+        let rgbx = new Uint8Array(width * height * 4);
+        for (let i = 0, j = 0; i < width * height * 4; i += 4, j += 3) {
+            rgbx[i]     = data[j];
+            rgbx[i + 1] = data[j + 1];
+            rgbx[i + 2] = data[j + 2];
+            rgbx[i + 3] = 255;  // Alpha
+        }
+
+        display.blitImage(x, y, width, height, rgbx, 0, false);
+
+        return true;
+    }
+
+    _paletteFilter(streamId, x, y, width, height, sock, display, depth) {
+        if (this._numColors === 0) {
+            if (sock.rQwait("TIGHT palette", 1)) {
+                return false;
+            }
+
+            const numColors = sock.rQpeek8() + 1;
+            const paletteSize = numColors * 3;
+
+            if (sock.rQwait("TIGHT palette", 1 + paletteSize)) {
+                return false;
+            }
+
+            this._numColors = numColors;
+            sock.rQskipBytes(1);
+
+            sock.rQshiftTo(this._palette, paletteSize);
+        }
+
+        const bpp = (this._numColors <= 2) ? 1 : 8;
+        const rowSize = Math.floor((width * bpp + 7) / 8);
+        const uncompressedSize = rowSize * height;
+
+        let data;
+
+        if (uncompressedSize === 0) {
+            return true;
+        }
+
+        if (uncompressedSize < 12) {
+            if (sock.rQwait("TIGHT", uncompressedSize)) {
+                return false;
+            }
+
+            data = sock.rQshiftBytes(uncompressedSize);
+        } else {
+            data = this._readData(sock);
+            if (data === null) {
+                return false;
+            }
+
+            this._zlibs[streamId].setInput(data);
+            data = this._zlibs[streamId].inflate(uncompressedSize);
+            this._zlibs[streamId].setInput(null);
+        }
+
+        // Convert indexed (palette based) image data to RGB
+        if (this._numColors == 2) {
+            this._monoRect(x, y, width, height, data, this._palette, display);
+        } else {
+            this._paletteRect(x, y, width, height, data, this._palette, display);
+        }
+
+        this._numColors = 0;
+
+        return true;
+    }
+
+    _monoRect(x, y, width, height, data, palette, display) {
+        // Convert indexed (palette based) image data to RGB
+        // TODO: reduce number of calculations inside loop
+        const dest = this._getScratchBuffer(width * height * 4);
+        const w = Math.floor((width + 7) / 8);
+        const w1 = Math.floor(width / 8);
+
+        for (let y = 0; y < height; y++) {
+            let dp, sp, x;
+            for (x = 0; x < w1; x++) {
+                for (let b = 7; b >= 0; b--) {
+                    dp = (y * width + x * 8 + 7 - b) * 4;
+                    sp = (data[y * w + x] >> b & 1) * 3;
+                    dest[dp]     = palette[sp];
+                    dest[dp + 1] = palette[sp + 1];
+                    dest[dp + 2] = palette[sp + 2];
+                    dest[dp + 3] = 255;
+                }
+            }
+
+            for (let b = 7; b >= 8 - width % 8; b--) {
+                dp = (y * width + x * 8 + 7 - b) * 4;
+                sp = (data[y * w + x] >> b & 1) * 3;
+                dest[dp]     = palette[sp];
+                dest[dp + 1] = palette[sp + 1];
+                dest[dp + 2] = palette[sp + 2];
+                dest[dp + 3] = 255;
+            }
+        }
+
+        display.blitImage(x, y, width, height, dest, 0, false);
+    }
+
+    _paletteRect(x, y, width, height, data, palette, display) {
+        // Convert indexed (palette based) image data to RGB
+        const dest = this._getScratchBuffer(width * height * 4);
+        const total = width * height * 4;
+        for (let i = 0, j = 0; i < total; i += 4, j++) {
+            const sp = data[j] * 3;
+            dest[i]     = palette[sp];
+            dest[i + 1] = palette[sp + 1];
+            dest[i + 2] = palette[sp + 2];
+            dest[i + 3] = 255;
+        }
+
+        display.blitImage(x, y, width, height, dest, 0, false);
+    }
+
+    _gradientFilter(streamId, x, y, width, height, sock, display, depth) {
+        throw new Error("Gradient filter not implemented");
+    }
+
+    _readData(sock) {
+        if (this._len === 0) {
+            if (sock.rQwait("TIGHT", 3)) {
+                return null;
+            }
+
+            let byte;
+
+            byte = sock.rQshift8();
+            this._len = byte & 0x7f;
+            if (byte & 0x80) {
+                byte = sock.rQshift8();
+                this._len |= (byte & 0x7f) << 7;
+                if (byte & 0x80) {
+                    byte = sock.rQshift8();
+                    this._len |= byte << 14;
+                }
+            }
+        }
+
+        if (sock.rQwait("TIGHT", this._len)) {
+            return null;
+        }
+
+        let data = sock.rQshiftBytes(this._len);
+        this._len = 0;
+
+        return data;
+    }
+
+    _getScratchBuffer(size) {
+        if (!this._scratchBuffer || (this._scratchBuffer.length < size)) {
+            this._scratchBuffer = new Uint8Array(size);
+        }
+        return this._scratchBuffer;
+    }
+}

static/novnc/core/decoders/tightpng.js

@@ -0,0 +1,27 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ *
+ */
+
+import TightDecoder from './tight.js';
+
+export default class TightPNGDecoder extends TightDecoder {
+    _pngRect(x, y, width, height, sock, display, depth) {
+        let data = this._readData(sock);
+        if (data === null) {
+            return false;
+        }
+
+        display.imageRect(x, y, width, height, "image/png", data);
+
+        return true;
+    }
+
+    _basicRect(ctl, x, y, width, height, sock, display, depth) {
+        throw new Error("BasicCompression received in TightPNG rect");
+    }
+}

static/novnc/core/deflator.js

@@ -0,0 +1,85 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2020 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+import { deflateInit, deflate } from "../vendor/pako/lib/zlib/deflate.js";
+import { Z_FULL_FLUSH } from "../vendor/pako/lib/zlib/deflate.js";
+import ZStream from "../vendor/pako/lib/zlib/zstream.js";
+
+export default class Deflator {
+    constructor() {
+        this.strm = new ZStream();
+        this.chunkSize = 1024 * 10 * 10;
+        this.outputBuffer = new Uint8Array(this.chunkSize);
+        this.windowBits = 5;
+
+        deflateInit(this.strm, this.windowBits);
+    }
+
+    deflate(inData) {
+        /* eslint-disable camelcase */
+        this.strm.input = inData;
+        this.strm.avail_in = this.strm.input.length;
+        this.strm.next_in = 0;
+        this.strm.output = this.outputBuffer;
+        this.strm.avail_out = this.chunkSize;
+        this.strm.next_out = 0;
+        /* eslint-enable camelcase */
+
+        let lastRet = deflate(this.strm, Z_FULL_FLUSH);
+        let outData = new Uint8Array(this.strm.output.buffer, 0, this.strm.next_out);
+
+        if (lastRet < 0) {
+            throw new Error("zlib deflate failed");
+        }
+
+        if (this.strm.avail_in > 0) {
+            // Read chunks until done
+
+            let chunks = [outData];
+            let totalLen = outData.length;
+            do {
+                /* eslint-disable camelcase */
+                this.strm.output = new Uint8Array(this.chunkSize);
+                this.strm.next_out = 0;
+                this.strm.avail_out = this.chunkSize;
+                /* eslint-enable camelcase */
+
+                lastRet = deflate(this.strm, Z_FULL_FLUSH);
+
+                if (lastRet < 0) {
+                    throw new Error("zlib deflate failed");
+                }
+
+                let chunk = new Uint8Array(this.strm.output.buffer, 0, this.strm.next_out);
+                totalLen += chunk.length;
+                chunks.push(chunk);
+            } while (this.strm.avail_in > 0);
+
+            // Combine chunks into a single data
+
+            let newData = new Uint8Array(totalLen);
+            let offset = 0;
+
+            for (let i = 0; i < chunks.length; i++) {
+                newData.set(chunks[i], offset);
+                offset += chunks[i].length;
+            }
+
+            outData = newData;
+        }
+
+        /* eslint-disable camelcase */
+        this.strm.input = null;
+        this.strm.avail_in = 0;
+        this.strm.next_in = 0;
+        /* eslint-enable camelcase */
+
+        return outData;
+    }
+
+}

static/novnc/core/des.js

@@ -0,0 +1,266 @@
+/*
+ * Ported from Flashlight VNC ActionScript implementation:
+ *     http://www.wizhelp.com/flashlight-vnc/
+ *
+ * Full attribution follows:
+ *
+ * -------------------------------------------------------------------------
+ *
+ * This DES class has been extracted from package Acme.Crypto for use in VNC.
+ * The unnecessary odd parity code has been removed.
+ *
+ * These changes are:
+ *  Copyright (C) 1999 AT&T Laboratories Cambridge.  All Rights Reserved.
+ *
+ * This software 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.
+ *
+
+ * DesCipher - the DES encryption method
+ *
+ * The meat of this code is by Dave Zimmerman <dzimm@widget.com>, and is:
+ *
+ * Copyright (c) 1996 Widget Workshop, Inc. All Rights Reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * and its documentation for NON-COMMERCIAL or COMMERCIAL purposes and
+ * without fee is hereby granted, provided that this copyright notice is kept
+ * intact.
+ *
+ * WIDGET WORKSHOP MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY
+ * OF THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+ * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. WIDGET WORKSHOP SHALL NOT BE LIABLE
+ * FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
+ * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
+ *
+ * THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE
+ * CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE
+ * PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT
+ * NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE
+ * SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
+ * SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE
+ * PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES").  WIDGET WORKSHOP
+ * SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR
+ * HIGH RISK ACTIVITIES.
+ *
+ *
+ * The rest is:
+ *
+ * Copyright (C) 1996 by Jef Poskanzer <jef@acme.com>.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * Visit the ACME Labs Java page for up-to-date versions of this and other
+ * fine Java utilities: http://www.acme.com/java/
+ */
+
+/* eslint-disable comma-spacing */
+
+// Tables, permutations, S-boxes, etc.
+const PC2 = [13,16,10,23, 0, 4, 2,27,14, 5,20, 9,22,18,11, 3,
+             25, 7,15, 6,26,19,12, 1,40,51,30,36,46,54,29,39,
+             50,44,32,47,43,48,38,55,33,52,45,41,49,35,28,31 ],
+    totrot = [ 1, 2, 4, 6, 8,10,12,14,15,17,19,21,23,25,27,28];
+
+const z = 0x0;
+let a,b,c,d,e,f;
+a=1<<16; b=1<<24; c=a|b; d=1<<2; e=1<<10; f=d|e;
+const SP1 = [c|e,z|z,a|z,c|f,c|d,a|f,z|d,a|z,z|e,c|e,c|f,z|e,b|f,c|d,b|z,z|d,
+             z|f,b|e,b|e,a|e,a|e,c|z,c|z,b|f,a|d,b|d,b|d,a|d,z|z,z|f,a|f,b|z,
+             a|z,c|f,z|d,c|z,c|e,b|z,b|z,z|e,c|d,a|z,a|e,b|d,z|e,z|d,b|f,a|f,
+             c|f,a|d,c|z,b|f,b|d,z|f,a|f,c|e,z|f,b|e,b|e,z|z,a|d,a|e,z|z,c|d];
+a=1<<20; b=1<<31; c=a|b; d=1<<5; e=1<<15; f=d|e;
+const SP2 = [c|f,b|e,z|e,a|f,a|z,z|d,c|d,b|f,b|d,c|f,c|e,b|z,b|e,a|z,z|d,c|d,
+             a|e,a|d,b|f,z|z,b|z,z|e,a|f,c|z,a|d,b|d,z|z,a|e,z|f,c|e,c|z,z|f,
+             z|z,a|f,c|d,a|z,b|f,c|z,c|e,z|e,c|z,b|e,z|d,c|f,a|f,z|d,z|e,b|z,
+             z|f,c|e,a|z,b|d,a|d,b|f,b|d,a|d,a|e,z|z,b|e,z|f,b|z,c|d,c|f,a|e];
+a=1<<17; b=1<<27; c=a|b; d=1<<3; e=1<<9; f=d|e;
+const SP3 = [z|f,c|e,z|z,c|d,b|e,z|z,a|f,b|e,a|d,b|d,b|d,a|z,c|f,a|d,c|z,z|f,
+             b|z,z|d,c|e,z|e,a|e,c|z,c|d,a|f,b|f,a|e,a|z,b|f,z|d,c|f,z|e,b|z,
+             c|e,b|z,a|d,z|f,a|z,c|e,b|e,z|z,z|e,a|d,c|f,b|e,b|d,z|e,z|z,c|d,
+             b|f,a|z,b|z,c|f,z|d,a|f,a|e,b|d,c|z,b|f,z|f,c|z,a|f,z|d,c|d,a|e];
+a=1<<13; b=1<<23; c=a|b; d=1<<0; e=1<<7; f=d|e;
+const SP4 = [c|d,a|f,a|f,z|e,c|e,b|f,b|d,a|d,z|z,c|z,c|z,c|f,z|f,z|z,b|e,b|d,
+             z|d,a|z,b|z,c|d,z|e,b|z,a|d,a|e,b|f,z|d,a|e,b|e,a|z,c|e,c|f,z|f,
+             b|e,b|d,c|z,c|f,z|f,z|z,z|z,c|z,a|e,b|e,b|f,z|d,c|d,a|f,a|f,z|e,
+             c|f,z|f,z|d,a|z,b|d,a|d,c|e,b|f,a|d,a|e,b|z,c|d,z|e,b|z,a|z,c|e];
+a=1<<25; b=1<<30; c=a|b; d=1<<8; e=1<<19; f=d|e;
+const SP5 = [z|d,a|f,a|e,c|d,z|e,z|d,b|z,a|e,b|f,z|e,a|d,b|f,c|d,c|e,z|f,b|z,
+             a|z,b|e,b|e,z|z,b|d,c|f,c|f,a|d,c|e,b|d,z|z,c|z,a|f,a|z,c|z,z|f,
+             z|e,c|d,z|d,a|z,b|z,a|e,c|d,b|f,a|d,b|z,c|e,a|f,b|f,z|d,a|z,c|e,
+             c|f,z|f,c|z,c|f,a|e,z|z,b|e,c|z,z|f,a|d,b|d,z|e,z|z,b|e,a|f,b|d];
+a=1<<22; b=1<<29; c=a|b; d=1<<4; e=1<<14; f=d|e;
+const SP6 = [b|d,c|z,z|e,c|f,c|z,z|d,c|f,a|z,b|e,a|f,a|z,b|d,a|d,b|e,b|z,z|f,
+             z|z,a|d,b|f,z|e,a|e,b|f,z|d,c|d,c|d,z|z,a|f,c|e,z|f,a|e,c|e,b|z,
+             b|e,z|d,c|d,a|e,c|f,a|z,z|f,b|d,a|z,b|e,b|z,z|f,b|d,c|f,a|e,c|z,
+             a|f,c|e,z|z,c|d,z|d,z|e,c|z,a|f,z|e,a|d,b|f,z|z,c|e,b|z,a|d,b|f];
+a=1<<21; b=1<<26; c=a|b; d=1<<1; e=1<<11; f=d|e;
+const SP7 = [a|z,c|d,b|f,z|z,z|e,b|f,a|f,c|e,c|f,a|z,z|z,b|d,z|d,b|z,c|d,z|f,
+             b|e,a|f,a|d,b|e,b|d,c|z,c|e,a|d,c|z,z|e,z|f,c|f,a|e,z|d,b|z,a|e,
+             b|z,a|e,a|z,b|f,b|f,c|d,c|d,z|d,a|d,b|z,b|e,a|z,c|e,z|f,a|f,c|e,
+             z|f,b|d,c|f,c|z,a|e,z|z,z|d,c|f,z|z,a|f,c|z,z|e,b|d,b|e,z|e,a|d];
+a=1<<18; b=1<<28; c=a|b; d=1<<6; e=1<<12; f=d|e;
+const SP8 = [b|f,z|e,a|z,c|f,b|z,b|f,z|d,b|z,a|d,c|z,c|f,a|e,c|e,a|f,z|e,z|d,
+             c|z,b|d,b|e,z|f,a|e,a|d,c|d,c|e,z|f,z|z,z|z,c|d,b|d,b|e,a|f,a|z,
+             a|f,a|z,c|e,z|e,z|d,c|d,z|e,a|f,b|e,z|d,b|d,c|z,c|d,b|z,a|z,b|f,
+             z|z,c|f,a|d,b|d,c|z,b|e,b|f,z|z,c|f,a|e,a|e,z|f,z|f,a|d,b|z,c|e];
+
+/* eslint-enable comma-spacing */
+
+export default class DES {
+    constructor(password) {
+        this.keys = [];
+
+        // Set the key.
+        const pc1m = [], pcr = [], kn = [];
+
+        for (let j = 0, l = 56; j < 56; ++j, l -= 8) {
+            l += l < -5 ? 65 : l < -3 ? 31 : l < -1 ? 63 : l === 27 ? 35 : 0; // PC1
+            const m = l & 0x7;
+            pc1m[j] = ((password[l >>> 3] & (1<<m)) !== 0) ? 1: 0;
+        }
+
+        for (let i = 0; i < 16; ++i) {
+            const m = i << 1;
+            const n = m + 1;
+            kn[m] = kn[n] = 0;
+            for (let o = 28; o < 59; o += 28) {
+                for (let j = o - 28; j < o; ++j) {
+                    const l = j + totrot[i];
+                    pcr[j] = l < o ? pc1m[l] : pc1m[l - 28];
+                }
+            }
+            for (let j = 0; j < 24; ++j) {
+                if (pcr[PC2[j]] !== 0) {
+                    kn[m] |= 1 << (23 - j);
+                }
+                if (pcr[PC2[j + 24]] !== 0) {
+                    kn[n] |= 1 << (23 - j);
+                }
+            }
+        }
+
+        // cookey
+        for (let i = 0, rawi = 0, KnLi = 0; i < 16; ++i) {
+            const raw0 = kn[rawi++];
+            const raw1 = kn[rawi++];
+            this.keys[KnLi] = (raw0 & 0x00fc0000) << 6;
+            this.keys[KnLi] |= (raw0 & 0x00000fc0) << 10;
+            this.keys[KnLi] |= (raw1 & 0x00fc0000) >>> 10;
+            this.keys[KnLi] |= (raw1 & 0x00000fc0) >>> 6;
+            ++KnLi;
+            this.keys[KnLi] = (raw0 & 0x0003f000) << 12;
+            this.keys[KnLi] |= (raw0 & 0x0000003f) << 16;
+            this.keys[KnLi] |= (raw1 & 0x0003f000) >>> 4;
+            this.keys[KnLi] |= (raw1 & 0x0000003f);
+            ++KnLi;
+        }
+    }
+
+    // Encrypt 8 bytes of text
+    enc8(text) {
+        const b = text.slice();
+        let i = 0, l, r, x; // left, right, accumulator
+
+        // Squash 8 bytes to 2 ints
+        l = b[i++]<<24 | b[i++]<<16 | b[i++]<<8 | b[i++];
+        r = b[i++]<<24 | b[i++]<<16 | b[i++]<<8 | b[i++];
+
+        x = ((l >>> 4) ^ r) & 0x0f0f0f0f;
+        r ^= x;
+        l ^= (x << 4);
+        x = ((l >>> 16) ^ r) & 0x0000ffff;
+        r ^= x;
+        l ^= (x << 16);
+        x = ((r >>> 2) ^ l) & 0x33333333;
+        l ^= x;
+        r ^= (x << 2);
+        x = ((r >>> 8) ^ l) & 0x00ff00ff;
+        l ^= x;
+        r ^= (x << 8);
+        r = (r << 1) | ((r >>> 31) & 1);
+        x = (l ^ r) & 0xaaaaaaaa;
+        l ^= x;
+        r ^= x;
+        l = (l << 1) | ((l >>> 31) & 1);
+
+        for (let i = 0, keysi = 0; i < 8; ++i) {
+            x = (r << 28) | (r >>> 4);
+            x ^= this.keys[keysi++];
+            let fval =  SP7[x & 0x3f];
+            fval |= SP5[(x >>> 8) & 0x3f];
+            fval |= SP3[(x >>> 16) & 0x3f];
+            fval |= SP1[(x >>> 24) & 0x3f];
+            x = r ^ this.keys[keysi++];
+            fval |= SP8[x & 0x3f];
+            fval |= SP6[(x >>> 8) & 0x3f];
+            fval |= SP4[(x >>> 16) & 0x3f];
+            fval |= SP2[(x >>> 24) & 0x3f];
+            l ^= fval;
+            x = (l << 28) | (l >>> 4);
+            x ^= this.keys[keysi++];
+            fval =  SP7[x & 0x3f];
+            fval |= SP5[(x >>> 8) & 0x3f];
+            fval |= SP3[(x >>> 16) & 0x3f];
+            fval |= SP1[(x >>> 24) & 0x3f];
+            x = l ^ this.keys[keysi++];
+            fval |= SP8[x & 0x0000003f];
+            fval |= SP6[(x >>> 8) & 0x3f];
+            fval |= SP4[(x >>> 16) & 0x3f];
+            fval |= SP2[(x >>> 24) & 0x3f];
+            r ^= fval;
+        }
+
+        r = (r << 31) | (r >>> 1);
+        x = (l ^ r) & 0xaaaaaaaa;
+        l ^= x;
+        r ^= x;
+        l = (l << 31) | (l >>> 1);
+        x = ((l >>> 8) ^ r) & 0x00ff00ff;
+        r ^= x;
+        l ^= (x << 8);
+        x = ((l >>> 2) ^ r) & 0x33333333;
+        r ^= x;
+        l ^= (x << 2);
+        x = ((r >>> 16) ^ l) & 0x0000ffff;
+        l ^= x;
+        r ^= (x << 16);
+        x = ((r >>> 4) ^ l) & 0x0f0f0f0f;
+        l ^= x;
+        r ^= (x << 4);
+
+        // Spread ints to bytes
+        x = [r, l];
+        for (i = 0; i < 8; i++) {
+            b[i] = (x[i>>>2] >>> (8 * (3 - (i % 4)))) % 256;
+            if (b[i] < 0) { b[i] += 256; } // unsigned
+        }
+        return b;
+    }
+
+    // Encrypt 16 bytes of text using passwd as key
+    encrypt(t) {
+        return this.enc8(t.slice(0, 8)).concat(this.enc8(t.slice(8, 16)));
+    }
+}

static/novnc/core/display.js

@@ -0,0 +1,513 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+import * as Log from './util/logging.js';
+import Base64 from "./base64.js";
+import { toSigned32bit } from './util/int.js';
+
+export default class Display {
+    constructor(target) {
+        this._drawCtx = null;
+
+        this._renderQ = [];  // queue drawing actions for in-oder rendering
+        this._flushing = false;
+
+        // the full frame buffer (logical canvas) size
+        this._fbWidth = 0;
+        this._fbHeight = 0;
+
+        this._prevDrawStyle = "";
+
+        Log.Debug(">> Display.constructor");
+
+        // The visible canvas
+        this._target = target;
+
+        if (!this._target) {
+            throw new Error("Target must be set");
+        }
+
+        if (typeof this._target === 'string') {
+            throw new Error('target must be a DOM element');
+        }
+
+        if (!this._target.getContext) {
+            throw new Error("no getContext method");
+        }
+
+        this._targetCtx = this._target.getContext('2d');
+
+        // the visible canvas viewport (i.e. what actually gets seen)
+        this._viewportLoc = { 'x': 0, 'y': 0, 'w': this._target.width, 'h': this._target.height };
+
+        // The hidden canvas, where we do the actual rendering
+        this._backbuffer = document.createElement('canvas');
+        this._drawCtx = this._backbuffer.getContext('2d');
+
+        this._damageBounds = { left: 0, top: 0,
+                               right: this._backbuffer.width,
+                               bottom: this._backbuffer.height };
+
+        Log.Debug("User Agent: " + navigator.userAgent);
+
+        Log.Debug("<< Display.constructor");
+
+        // ===== PROPERTIES =====
+
+        this._scale = 1.0;
+        this._clipViewport = false;
+
+        // ===== EVENT HANDLERS =====
+
+        this.onflush = () => {}; // A flush request has finished
+    }
+
+    // ===== PROPERTIES =====
+
+    get scale() { return this._scale; }
+    set scale(scale) {
+        this._rescale(scale);
+    }
+
+    get clipViewport() { return this._clipViewport; }
+    set clipViewport(viewport) {
+        this._clipViewport = viewport;
+        // May need to readjust the viewport dimensions
+        const vp = this._viewportLoc;
+        this.viewportChangeSize(vp.w, vp.h);
+        this.viewportChangePos(0, 0);
+    }
+
+    get width() {
+        return this._fbWidth;
+    }
+
+    get height() {
+        return this._fbHeight;
+    }
+
+    // ===== PUBLIC METHODS =====
+
+    viewportChangePos(deltaX, deltaY) {
+        const vp = this._viewportLoc;
+        deltaX = Math.floor(deltaX);
+        deltaY = Math.floor(deltaY);
+
+        if (!this._clipViewport) {
+            deltaX = -vp.w;  // clamped later of out of bounds
+            deltaY = -vp.h;
+        }
+
+        const vx2 = vp.x + vp.w - 1;
+        const vy2 = vp.y + vp.h - 1;
+
+        // Position change
+
+        if (deltaX < 0 && vp.x + deltaX < 0) {
+            deltaX = -vp.x;
+        }
+        if (vx2 + deltaX >= this._fbWidth) {
+            deltaX -= vx2 + deltaX - this._fbWidth + 1;
+        }
+
+        if (vp.y + deltaY < 0) {
+            deltaY = -vp.y;
+        }
+        if (vy2 + deltaY >= this._fbHeight) {
+            deltaY -= (vy2 + deltaY - this._fbHeight + 1);
+        }
+
+        if (deltaX === 0 && deltaY === 0) {
+            return;
+        }
+        Log.Debug("viewportChange deltaX: " + deltaX + ", deltaY: " + deltaY);
+
+        vp.x += deltaX;
+        vp.y += deltaY;
+
+        this._damage(vp.x, vp.y, vp.w, vp.h);
+
+        this.flip();
+    }
+
+    viewportChangeSize(width, height) {
+
+        if (!this._clipViewport ||
+            typeof(width) === "undefined" ||
+            typeof(height) === "undefined") {
+
+            Log.Debug("Setting viewport to full display region");
+            width = this._fbWidth;
+            height = this._fbHeight;
+        }
+
+        width = Math.floor(width);
+        height = Math.floor(height);
+
+        if (width > this._fbWidth) {
+            width = this._fbWidth;
+        }
+        if (height > this._fbHeight) {
+            height = this._fbHeight;
+        }
+
+        const vp = this._viewportLoc;
+        if (vp.w !== width || vp.h !== height) {
+            vp.w = width;
+            vp.h = height;
+
+            const canvas = this._target;
+            canvas.width = width;
+            canvas.height = height;
+
+            // The position might need to be updated if we've grown
+            this.viewportChangePos(0, 0);
+
+            this._damage(vp.x, vp.y, vp.w, vp.h);
+            this.flip();
+
+            // Update the visible size of the target canvas
+            this._rescale(this._scale);
+        }
+    }
+
+    absX(x) {
+        if (this._scale === 0) {
+            return 0;
+        }
+        return toSigned32bit(x / this._scale + this._viewportLoc.x);
+    }
+
+    absY(y) {
+        if (this._scale === 0) {
+            return 0;
+        }
+        return toSigned32bit(y / this._scale + this._viewportLoc.y);
+    }
+
+    resize(width, height) {
+        this._prevDrawStyle = "";
+
+        this._fbWidth = width;
+        this._fbHeight = height;
+
+        const canvas = this._backbuffer;
+        if (canvas.width !== width || canvas.height !== height) {
+
+            // We have to save the canvas data since changing the size will clear it
+            let saveImg = null;
+            if (canvas.width > 0 && canvas.height > 0) {
+                saveImg = this._drawCtx.getImageData(0, 0, canvas.width, canvas.height);
+            }
+
+            if (canvas.width !== width) {
+                canvas.width = width;
+            }
+            if (canvas.height !== height) {
+                canvas.height = height;
+            }
+
+            if (saveImg) {
+                this._drawCtx.putImageData(saveImg, 0, 0);
+            }
+        }
+
+        // Readjust the viewport as it may be incorrectly sized
+        // and positioned
+        const vp = this._viewportLoc;
+        this.viewportChangeSize(vp.w, vp.h);
+        this.viewportChangePos(0, 0);
+    }
+
+    // Track what parts of the visible canvas that need updating
+    _damage(x, y, w, h) {
+        if (x < this._damageBounds.left) {
+            this._damageBounds.left = x;
+        }
+        if (y < this._damageBounds.top) {
+            this._damageBounds.top = y;
+        }
+        if ((x + w) > this._damageBounds.right) {
+            this._damageBounds.right = x + w;
+        }
+        if ((y + h) > this._damageBounds.bottom) {
+            this._damageBounds.bottom = y + h;
+        }
+    }
+
+    // Update the visible canvas with the contents of the
+    // rendering canvas
+    flip(fromQueue) {
+        if (this._renderQ.length !== 0 && !fromQueue) {
+            this._renderQPush({
+                'type': 'flip'
+            });
+        } else {
+            let x = this._damageBounds.left;
+            let y = this._damageBounds.top;
+            let w = this._damageBounds.right - x;
+            let h = this._damageBounds.bottom - y;
+
+            let vx = x - this._viewportLoc.x;
+            let vy = y - this._viewportLoc.y;
+
+            if (vx < 0) {
+                w += vx;
+                x -= vx;
+                vx = 0;
+            }
+            if (vy < 0) {
+                h += vy;
+                y -= vy;
+                vy = 0;
+            }
+
+            if ((vx + w) > this._viewportLoc.w) {
+                w = this._viewportLoc.w - vx;
+            }
+            if ((vy + h) > this._viewportLoc.h) {
+                h = this._viewportLoc.h - vy;
+            }
+
+            if ((w > 0) && (h > 0)) {
+                // FIXME: We may need to disable image smoothing here
+                //        as well (see copyImage()), but we haven't
+                //        noticed any problem yet.
+                this._targetCtx.drawImage(this._backbuffer,
+                                          x, y, w, h,
+                                          vx, vy, w, h);
+            }
+
+            this._damageBounds.left = this._damageBounds.top = 65535;
+            this._damageBounds.right = this._damageBounds.bottom = 0;
+        }
+    }
+
+    pending() {
+        return this._renderQ.length > 0;
+    }
+
+    flush() {
+        if (this._renderQ.length === 0) {
+            this.onflush();
+        } else {
+            this._flushing = true;
+        }
+    }
+
+    fillRect(x, y, width, height, color, fromQueue) {
+        if (this._renderQ.length !== 0 && !fromQueue) {
+            this._renderQPush({
+                'type': 'fill',
+                'x': x,
+                'y': y,
+                'width': width,
+                'height': height,
+                'color': color
+            });
+        } else {
+            this._setFillColor(color);
+            this._drawCtx.fillRect(x, y, width, height);
+            this._damage(x, y, width, height);
+        }
+    }
+
+    copyImage(oldX, oldY, newX, newY, w, h, fromQueue) {
+        if (this._renderQ.length !== 0 && !fromQueue) {
+            this._renderQPush({
+                'type': 'copy',
+                'oldX': oldX,
+                'oldY': oldY,
+                'x': newX,
+                'y': newY,
+                'width': w,
+                'height': h,
+            });
+        } else {
+            // Due to this bug among others [1] we need to disable the image-smoothing to
+            // avoid getting a blur effect when copying data.
+            //
+            // 1. https://bugzilla.mozilla.org/show_bug.cgi?id=1194719
+            //
+            // We need to set these every time since all properties are reset
+            // when the the size is changed
+            this._drawCtx.mozImageSmoothingEnabled = false;
+            this._drawCtx.webkitImageSmoothingEnabled = false;
+            this._drawCtx.msImageSmoothingEnabled = false;
+            this._drawCtx.imageSmoothingEnabled = false;
+
+            this._drawCtx.drawImage(this._backbuffer,
+                                    oldX, oldY, w, h,
+                                    newX, newY, w, h);
+            this._damage(newX, newY, w, h);
+        }
+    }
+
+    imageRect(x, y, width, height, mime, arr) {
+        /* The internal logic cannot handle empty images, so bail early */
+        if ((width === 0) || (height === 0)) {
+            return;
+        }
+
+        const img = new Image();
+        img.src = "data: " + mime + ";base64," + Base64.encode(arr);
+
+        this._renderQPush({
+            'type': 'img',
+            'img': img,
+            'x': x,
+            'y': y,
+            'width': width,
+            'height': height
+        });
+    }
+
+    blitImage(x, y, width, height, arr, offset, fromQueue) {
+        if (this._renderQ.length !== 0 && !fromQueue) {
+            // NB(directxman12): it's technically more performant here to use preallocated arrays,
+            // but it's a lot of extra work for not a lot of payoff -- if we're using the render queue,
+            // this probably isn't getting called *nearly* as much
+            const newArr = new Uint8Array(width * height * 4);
+            newArr.set(new Uint8Array(arr.buffer, 0, newArr.length));
+            this._renderQPush({
+                'type': 'blit',
+                'data': newArr,
+                'x': x,
+                'y': y,
+                'width': width,
+                'height': height,
+            });
+        } else {
+            // NB(directxman12): arr must be an Type Array view
+            let data = new Uint8ClampedArray(arr.buffer,
+                                             arr.byteOffset + offset,
+                                             width * height * 4);
+            let img = new ImageData(data, width, height);
+            this._drawCtx.putImageData(img, x, y);
+            this._damage(x, y, width, height);
+        }
+    }
+
+    drawImage(img, x, y) {
+        this._drawCtx.drawImage(img, x, y);
+        this._damage(x, y, img.width, img.height);
+    }
+
+    autoscale(containerWidth, containerHeight) {
+        let scaleRatio;
+
+        if (containerWidth === 0 || containerHeight === 0) {
+            scaleRatio = 0;
+
+        } else {
+
+            const vp = this._viewportLoc;
+            const targetAspectRatio = containerWidth / containerHeight;
+            const fbAspectRatio = vp.w / vp.h;
+
+            if (fbAspectRatio >= targetAspectRatio) {
+                scaleRatio = containerWidth / vp.w;
+            } else {
+                scaleRatio = containerHeight / vp.h;
+            }
+        }
+
+        this._rescale(scaleRatio);
+    }
+
+    // ===== PRIVATE METHODS =====
+
+    _rescale(factor) {
+        this._scale = factor;
+        const vp = this._viewportLoc;
+
+        // NB(directxman12): If you set the width directly, or set the
+        //                   style width to a number, the canvas is cleared.
+        //                   However, if you set the style width to a string
+        //                   ('NNNpx'), the canvas is scaled without clearing.
+        const width = factor * vp.w + 'px';
+        const height = factor * vp.h + 'px';
+
+        if ((this._target.style.width !== width) ||
+            (this._target.style.height !== height)) {
+            this._target.style.width = width;
+            this._target.style.height = height;
+        }
+    }
+
+    _setFillColor(color) {
+        const newStyle = 'rgb(' + color[0] + ',' + color[1] + ',' + color[2] + ')';
+        if (newStyle !== this._prevDrawStyle) {
+            this._drawCtx.fillStyle = newStyle;
+            this._prevDrawStyle = newStyle;
+        }
+    }
+
+    _renderQPush(action) {
+        this._renderQ.push(action);
+        if (this._renderQ.length === 1) {
+            // If this can be rendered immediately it will be, otherwise
+            // the scanner will wait for the relevant event
+            this._scanRenderQ();
+        }
+    }
+
+    _resumeRenderQ() {
+        // "this" is the object that is ready, not the
+        // display object
+        this.removeEventListener('load', this._noVNCDisplay._resumeRenderQ);
+        this._noVNCDisplay._scanRenderQ();
+    }
+
+    _scanRenderQ() {
+        let ready = true;
+        while (ready && this._renderQ.length > 0) {
+            const a = this._renderQ[0];
+            switch (a.type) {
+                case 'flip':
+                    this.flip(true);
+                    break;
+                case 'copy':
+                    this.copyImage(a.oldX, a.oldY, a.x, a.y, a.width, a.height, true);
+                    break;
+                case 'fill':
+                    this.fillRect(a.x, a.y, a.width, a.height, a.color, true);
+                    break;
+                case 'blit':
+                    this.blitImage(a.x, a.y, a.width, a.height, a.data, 0, true);
+                    break;
+                case 'img':
+                    if (a.img.complete) {
+                        if (a.img.width !== a.width || a.img.height !== a.height) {
+                            Log.Error("Decoded image has incorrect dimensions. Got " +
+                                      a.img.width + "x" + a.img.height + ". Expected " +
+                                      a.width + "x" + a.height + ".");
+                            return;
+                        }
+                        this.drawImage(a.img, a.x, a.y);
+                    } else {
+                        a.img._noVNCDisplay = this;
+                        a.img.addEventListener('load', this._resumeRenderQ);
+                        // We need to wait for this image to 'load'
+                        // to keep things in-order
+                        ready = false;
+                    }
+                    break;
+            }
+
+            if (ready) {
+                this._renderQ.shift();
+            }
+        }
+
+        if (this._renderQ.length === 0 && this._flushing) {
+            this._flushing = false;
+            this.onflush();
+        }
+    }
+}

static/novnc/core/encodings.js

@@ -0,0 +1,44 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+export const encodings = {
+    encodingRaw: 0,
+    encodingCopyRect: 1,
+    encodingRRE: 2,
+    encodingHextile: 5,
+    encodingTight: 7,
+    encodingTightPNG: -260,
+
+    pseudoEncodingQualityLevel9: -23,
+    pseudoEncodingQualityLevel0: -32,
+    pseudoEncodingDesktopSize: -223,
+    pseudoEncodingLastRect: -224,
+    pseudoEncodingCursor: -239,
+    pseudoEncodingQEMUExtendedKeyEvent: -258,
+    pseudoEncodingDesktopName: -307,
+    pseudoEncodingExtendedDesktopSize: -308,
+    pseudoEncodingXvp: -309,
+    pseudoEncodingFence: -312,
+    pseudoEncodingContinuousUpdates: -313,
+    pseudoEncodingCompressLevel9: -247,
+    pseudoEncodingCompressLevel0: -256,
+    pseudoEncodingVMwareCursor: 0x574d5664,
+    pseudoEncodingExtendedClipboard: 0xc0a1e5ce
+};
+
+export function encodingName(num) {
+    switch (num) {
+        case encodings.encodingRaw:      return "Raw";
+        case encodings.encodingCopyRect: return "CopyRect";
+        case encodings.encodingRRE:      return "RRE";
+        case encodings.encodingHextile:  return "Hextile";
+        case encodings.encodingTight:    return "Tight";
+        case encodings.encodingTightPNG: return "TightPNG";
+        default:                         return "[unknown encoding " + num + "]";
+    }
+}

static/novnc/core/inflator.js

@@ -0,0 +1,66 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2020 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+import { inflateInit, inflate, inflateReset } from "../vendor/pako/lib/zlib/inflate.js";
+import ZStream from "../vendor/pako/lib/zlib/zstream.js";
+
+export default class Inflate {
+    constructor() {
+        this.strm = new ZStream();
+        this.chunkSize = 1024 * 10 * 10;
+        this.strm.output = new Uint8Array(this.chunkSize);
+        this.windowBits = 5;
+
+        inflateInit(this.strm, this.windowBits);
+    }
+
+    setInput(data) {
+        if (!data) {
+            //FIXME: flush remaining data.
+            /* eslint-disable camelcase */
+            this.strm.input = null;
+            this.strm.avail_in = 0;
+            this.strm.next_in = 0;
+        } else {
+            this.strm.input = data;
+            this.strm.avail_in = this.strm.input.length;
+            this.strm.next_in = 0;
+            /* eslint-enable camelcase */
+        }
+    }
+
+    inflate(expected) {
+        // resize our output buffer if it's too small
+        // (we could just use multiple chunks, but that would cause an extra
+        // allocation each time to flatten the chunks)
+        if (expected > this.chunkSize) {
+            this.chunkSize = expected;
+            this.strm.output = new Uint8Array(this.chunkSize);
+        }
+
+        /* eslint-disable camelcase */
+        this.strm.next_out = 0;
+        this.strm.avail_out = expected;
+        /* eslint-enable camelcase */
+
+        let ret = inflate(this.strm, 0); // Flush argument not used.
+        if (ret < 0) {
+            throw new Error("zlib inflate failed");
+        }
+
+        if (this.strm.next_out != expected) {
+            throw new Error("Incomplete zlib block");
+        }
+
+        return new Uint8Array(this.strm.output.buffer, 0, this.strm.next_out);
+    }
+
+    reset() {
+        inflateReset(this.strm);
+    }
+}

static/novnc/core/input/domkeytable.js

@@ -0,0 +1,311 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2018 The noVNC Authors
+ * Licensed under MPL 2.0 or any later version (see LICENSE.txt)
+ */
+
+import KeyTable from "./keysym.js";
+
+/*
+ * Mapping between HTML key values and VNC/X11 keysyms for "special"
+ * keys that cannot be handled via their Unicode codepoint.
+ *
+ * See https://www.w3.org/TR/uievents-key/ for possible values.
+ */
+
+const DOMKeyTable = {};
+
+function addStandard(key, standard) {
+    if (standard === undefined) throw new Error("Undefined keysym for key \"" + key + "\"");
+    if (key in DOMKeyTable) throw new Error("Duplicate entry for key \"" + key + "\"");
+    DOMKeyTable[key] = [standard, standard, standard, standard];
+}
+
+function addLeftRight(key, left, right) {
+    if (left === undefined) throw new Error("Undefined keysym for key \"" + key + "\"");
+    if (right === undefined) throw new Error("Undefined keysym for key \"" + key + "\"");
+    if (key in DOMKeyTable) throw new Error("Duplicate entry for key \"" + key + "\"");
+    DOMKeyTable[key] = [left, left, right, left];
+}
+
+function addNumpad(key, standard, numpad) {
+    if (standard === undefined) throw new Error("Undefined keysym for key \"" + key + "\"");
+    if (numpad === undefined) throw new Error("Undefined keysym for key \"" + key + "\"");
+    if (key in DOMKeyTable) throw new Error("Duplicate entry for key \"" + key + "\"");
+    DOMKeyTable[key] = [standard, standard, standard, numpad];
+}
+
+// 3.2. Modifier Keys
+
+addLeftRight("Alt", KeyTable.XK_Alt_L, KeyTable.XK_Alt_R);
+addStandard("AltGraph", KeyTable.XK_ISO_Level3_Shift);
+addStandard("CapsLock", KeyTable.XK_Caps_Lock);
+addLeftRight("Control", KeyTable.XK_Control_L, KeyTable.XK_Control_R);
+// - Fn
+// - FnLock
+addLeftRight("Meta", KeyTable.XK_Super_L, KeyTable.XK_Super_R);
+addStandard("NumLock", KeyTable.XK_Num_Lock);
+addStandard("ScrollLock", KeyTable.XK_Scroll_Lock);
+addLeftRight("Shift", KeyTable.XK_Shift_L, KeyTable.XK_Shift_R);
+// - Symbol
+// - SymbolLock
+// - Hyper
+// - Super
+
+// 3.3. Whitespace Keys
+
+addNumpad("Enter", KeyTable.XK_Return, KeyTable.XK_KP_Enter);
+addStandard("Tab", KeyTable.XK_Tab);
+addNumpad(" ", KeyTable.XK_space, KeyTable.XK_KP_Space);
+
+// 3.4. Navigation Keys
+
+addNumpad("ArrowDown", KeyTable.XK_Down, KeyTable.XK_KP_Down);
+addNumpad("ArrowLeft", KeyTable.XK_Left, KeyTable.XK_KP_Left);
+addNumpad("ArrowRight", KeyTable.XK_Right, KeyTable.XK_KP_Right);
+addNumpad("ArrowUp", KeyTable.XK_Up, KeyTable.XK_KP_Up);
+addNumpad("End", KeyTable.XK_End, KeyTable.XK_KP_End);
+addNumpad("Home", KeyTable.XK_Home, KeyTable.XK_KP_Home);
+addNumpad("PageDown", KeyTable.XK_Next, KeyTable.XK_KP_Next);
+addNumpad("PageUp", KeyTable.XK_Prior, KeyTable.XK_KP_Prior);
+
+// 3.5. Editing Keys
+
+addStandard("Backspace", KeyTable.XK_BackSpace);
+// Browsers send "Clear" for the numpad 5 without NumLock because
+// Windows uses VK_Clear for that key. But Unix expects KP_Begin for
+// that scenario.
+addNumpad("Clear", KeyTable.XK_Clear, KeyTable.XK_KP_Begin);
+addStandard("Copy", KeyTable.XF86XK_Copy);
+// - CrSel
+addStandard("Cut", KeyTable.XF86XK_Cut);
+addNumpad("Delete", KeyTable.XK_Delete, KeyTable.XK_KP_Delete);
+// - EraseEof
+// - ExSel
+addNumpad("Insert", KeyTable.XK_Insert, KeyTable.XK_KP_Insert);
+addStandard("Paste", KeyTable.XF86XK_Paste);
+addStandard("Redo", KeyTable.XK_Redo);
+addStandard("Undo", KeyTable.XK_Undo);
+
+// 3.6. UI Keys
+
+// - Accept
+// - Again (could just be XK_Redo)
+// - Attn
+addStandard("Cancel", KeyTable.XK_Cancel);
+addStandard("ContextMenu", KeyTable.XK_Menu);
+addStandard("Escape", KeyTable.XK_Escape);
+addStandard("Execute", KeyTable.XK_Execute);
+addStandard("Find", KeyTable.XK_Find);
+addStandard("Help", KeyTable.XK_Help);
+addStandard("Pause", KeyTable.XK_Pause);
+// - Play
+// - Props
+addStandard("Select", KeyTable.XK_Select);
+addStandard("ZoomIn", KeyTable.XF86XK_ZoomIn);
+addStandard("ZoomOut", KeyTable.XF86XK_ZoomOut);
+
+// 3.7. Device Keys
+
+addStandard("BrightnessDown", KeyTable.XF86XK_MonBrightnessDown);
+addStandard("BrightnessUp", KeyTable.XF86XK_MonBrightnessUp);
+addStandard("Eject", KeyTable.XF86XK_Eject);
+addStandard("LogOff", KeyTable.XF86XK_LogOff);
+addStandard("Power", KeyTable.XF86XK_PowerOff);
+addStandard("PowerOff", KeyTable.XF86XK_PowerDown);
+addStandard("PrintScreen", KeyTable.XK_Print);
+addStandard("Hibernate", KeyTable.XF86XK_Hibernate);
+addStandard("Standby", KeyTable.XF86XK_Standby);
+addStandard("WakeUp", KeyTable.XF86XK_WakeUp);
+
+// 3.8. IME and Composition Keys
+
+addStandard("AllCandidates", KeyTable.XK_MultipleCandidate);
+addStandard("Alphanumeric", KeyTable.XK_Eisu_toggle);
+addStandard("CodeInput", KeyTable.XK_Codeinput);
+addStandard("Compose", KeyTable.XK_Multi_key);
+addStandard("Convert", KeyTable.XK_Henkan);
+// - Dead
+// - FinalMode
+addStandard("GroupFirst", KeyTable.XK_ISO_First_Group);
+addStandard("GroupLast", KeyTable.XK_ISO_Last_Group);
+addStandard("GroupNext", KeyTable.XK_ISO_Next_Group);
+addStandard("GroupPrevious", KeyTable.XK_ISO_Prev_Group);
+// - ModeChange (XK_Mode_switch is often used for AltGr)
+// - NextCandidate
+addStandard("NonConvert", KeyTable.XK_Muhenkan);
+addStandard("PreviousCandidate", KeyTable.XK_PreviousCandidate);
+// - Process
+addStandard("SingleCandidate", KeyTable.XK_SingleCandidate);
+addStandard("HangulMode", KeyTable.XK_Hangul);
+addStandard("HanjaMode", KeyTable.XK_Hangul_Hanja);
+addStandard("JunjaMode", KeyTable.XK_Hangul_Jeonja);
+addStandard("Eisu", KeyTable.XK_Eisu_toggle);
+addStandard("Hankaku", KeyTable.XK_Hankaku);
+addStandard("Hiragana", KeyTable.XK_Hiragana);
+addStandard("HiraganaKatakana", KeyTable.XK_Hiragana_Katakana);
+addStandard("KanaMode", KeyTable.XK_Kana_Shift); // could also be _Kana_Lock
+addStandard("KanjiMode", KeyTable.XK_Kanji);
+addStandard("Katakana", KeyTable.XK_Katakana);
+addStandard("Romaji", KeyTable.XK_Romaji);
+addStandard("Zenkaku", KeyTable.XK_Zenkaku);
+addStandard("ZenkakuHankaku", KeyTable.XK_Zenkaku_Hankaku);
+
+// 3.9. General-Purpose Function Keys
+
+addStandard("F1", KeyTable.XK_F1);
+addStandard("F2", KeyTable.XK_F2);
+addStandard("F3", KeyTable.XK_F3);
+addStandard("F4", KeyTable.XK_F4);
+addStandard("F5", KeyTable.XK_F5);
+addStandard("F6", KeyTable.XK_F6);
+addStandard("F7", KeyTable.XK_F7);
+addStandard("F8", KeyTable.XK_F8);
+addStandard("F9", KeyTable.XK_F9);
+addStandard("F10", KeyTable.XK_F10);
+addStandard("F11", KeyTable.XK_F11);
+addStandard("F12", KeyTable.XK_F12);
+addStandard("F13", KeyTable.XK_F13);
+addStandard("F14", KeyTable.XK_F14);
+addStandard("F15", KeyTable.XK_F15);
+addStandard("F16", KeyTable.XK_F16);
+addStandard("F17", KeyTable.XK_F17);
+addStandard("F18", KeyTable.XK_F18);
+addStandard("F19", KeyTable.XK_F19);
+addStandard("F20", KeyTable.XK_F20);
+addStandard("F21", KeyTable.XK_F21);
+addStandard("F22", KeyTable.XK_F22);
+addStandard("F23", KeyTable.XK_F23);
+addStandard("F24", KeyTable.XK_F24);
+addStandard("F25", KeyTable.XK_F25);
+addStandard("F26", KeyTable.XK_F26);
+addStandard("F27", KeyTable.XK_F27);
+addStandard("F28", KeyTable.XK_F28);
+addStandard("F29", KeyTable.XK_F29);
+addStandard("F30", KeyTable.XK_F30);
+addStandard("F31", KeyTable.XK_F31);
+addStandard("F32", KeyTable.XK_F32);
+addStandard("F33", KeyTable.XK_F33);
+addStandard("F34", KeyTable.XK_F34);
+addStandard("F35", KeyTable.XK_F35);
+// - Soft1...
+
+// 3.10. Multimedia Keys
+
+// - ChannelDown
+// - ChannelUp
+addStandard("Close", KeyTable.XF86XK_Close);
+addStandard("MailForward", KeyTable.XF86XK_MailForward);
+addStandard("MailReply", KeyTable.XF86XK_Reply);
+addStandard("MailSend", KeyTable.XF86XK_Send);
+// - MediaClose
+addStandard("MediaFastForward", KeyTable.XF86XK_AudioForward);
+addStandard("MediaPause", KeyTable.XF86XK_AudioPause);
+addStandard("MediaPlay", KeyTable.XF86XK_AudioPlay);
+// - MediaPlayPause
+addStandard("MediaRecord", KeyTable.XF86XK_AudioRecord);
+addStandard("MediaRewind", KeyTable.XF86XK_AudioRewind);
+addStandard("MediaStop", KeyTable.XF86XK_AudioStop);
+addStandard("MediaTrackNext", KeyTable.XF86XK_AudioNext);
+addStandard("MediaTrackPrevious", KeyTable.XF86XK_AudioPrev);
+addStandard("New", KeyTable.XF86XK_New);
+addStandard("Open", KeyTable.XF86XK_Open);
+addStandard("Print", KeyTable.XK_Print);
+addStandard("Save", KeyTable.XF86XK_Save);
+addStandard("SpellCheck", KeyTable.XF86XK_Spell);
+
+// 3.11. Multimedia Numpad Keys
+
+// - Key11
+// - Key12
+
+// 3.12. Audio Keys
+
+// - AudioBalanceLeft
+// - AudioBalanceRight
+// - AudioBassBoostDown
+// - AudioBassBoostToggle
+// - AudioBassBoostUp
+// - AudioFaderFront
+// - AudioFaderRear
+// - AudioSurroundModeNext
+// - AudioTrebleDown
+// - AudioTrebleUp
+addStandard("AudioVolumeDown", KeyTable.XF86XK_AudioLowerVolume);
+addStandard("AudioVolumeUp", KeyTable.XF86XK_AudioRaiseVolume);
+addStandard("AudioVolumeMute", KeyTable.XF86XK_AudioMute);
+// - MicrophoneToggle
+// - MicrophoneVolumeDown
+// - MicrophoneVolumeUp
+addStandard("MicrophoneVolumeMute", KeyTable.XF86XK_AudioMicMute);
+
+// 3.13. Speech Keys
+
+// - SpeechCorrectionList
+// - SpeechInputToggle
+
+// 3.14. Application Keys
+
+addStandard("LaunchApplication1", KeyTable.XF86XK_MyComputer);
+addStandard("LaunchApplication2", KeyTable.XF86XK_Calculator);
+addStandard("LaunchCalendar", KeyTable.XF86XK_Calendar);
+// - LaunchContacts
+addStandard("LaunchMail", KeyTable.XF86XK_Mail);
+addStandard("LaunchMediaPlayer", KeyTable.XF86XK_AudioMedia);
+addStandard("LaunchMusicPlayer", KeyTable.XF86XK_Music);
+addStandard("LaunchPhone", KeyTable.XF86XK_Phone);
+addStandard("LaunchScreenSaver", KeyTable.XF86XK_ScreenSaver);
+addStandard("LaunchSpreadsheet", KeyTable.XF86XK_Excel);
+addStandard("LaunchWebBrowser", KeyTable.XF86XK_WWW);
+addStandard("LaunchWebCam", KeyTable.XF86XK_WebCam);
+addStandard("LaunchWordProcessor", KeyTable.XF86XK_Word);
+
+// 3.15. Browser Keys
+
+addStandard("BrowserBack", KeyTable.XF86XK_Back);
+addStandard("BrowserFavorites", KeyTable.XF86XK_Favorites);
+addStandard("BrowserForward", KeyTable.XF86XK_Forward);
+addStandard("BrowserHome", KeyTable.XF86XK_HomePage);
+addStandard("BrowserRefresh", KeyTable.XF86XK_Refresh);
+addStandard("BrowserSearch", KeyTable.XF86XK_Search);
+addStandard("BrowserStop", KeyTable.XF86XK_Stop);
+
+// 3.16. Mobile Phone Keys
+
+// - A whole bunch...
+
+// 3.17. TV Keys
+
+// - A whole bunch...
+
+// 3.18. Media Controller Keys
+
+// - A whole bunch...
+addStandard("Dimmer", KeyTable.XF86XK_BrightnessAdjust);
+addStandard("MediaAudioTrack", KeyTable.XF86XK_AudioCycleTrack);
+addStandard("RandomToggle", KeyTable.XF86XK_AudioRandomPlay);
+addStandard("SplitScreenToggle", KeyTable.XF86XK_SplitScreen);
+addStandard("Subtitle", KeyTable.XF86XK_Subtitle);
+addStandard("VideoModeNext", KeyTable.XF86XK_Next_VMode);
+
+// Extra: Numpad
+
+addNumpad("=", KeyTable.XK_equal, KeyTable.XK_KP_Equal);
+addNumpad("+", KeyTable.XK_plus, KeyTable.XK_KP_Add);
+addNumpad("-", KeyTable.XK_minus, KeyTable.XK_KP_Subtract);
+addNumpad("*", KeyTable.XK_asterisk, KeyTable.XK_KP_Multiply);
+addNumpad("/", KeyTable.XK_slash, KeyTable.XK_KP_Divide);
+addNumpad(".", KeyTable.XK_period, KeyTable.XK_KP_Decimal);
+addNumpad(",", KeyTable.XK_comma, KeyTable.XK_KP_Separator);
+addNumpad("0", KeyTable.XK_0, KeyTable.XK_KP_0);
+addNumpad("1", KeyTable.XK_1, KeyTable.XK_KP_1);
+addNumpad("2", KeyTable.XK_2, KeyTable.XK_KP_2);
+addNumpad("3", KeyTable.XK_3, KeyTable.XK_KP_3);
+addNumpad("4", KeyTable.XK_4, KeyTable.XK_KP_4);
+addNumpad("5", KeyTable.XK_5, KeyTable.XK_KP_5);
+addNumpad("6", KeyTable.XK_6, KeyTable.XK_KP_6);
+addNumpad("7", KeyTable.XK_7, KeyTable.XK_KP_7);
+addNumpad("8", KeyTable.XK_8, KeyTable.XK_KP_8);
+addNumpad("9", KeyTable.XK_9, KeyTable.XK_KP_9);
+
+export default DOMKeyTable;

static/novnc/core/input/fixedkeys.js

@@ -0,0 +1,129 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2018 The noVNC Authors
+ * Licensed under MPL 2.0 or any later version (see LICENSE.txt)
+ */
+
+/*
+ * Fallback mapping between HTML key codes (physical keys) and
+ * HTML key values. This only works for keys that don't vary
+ * between layouts. We also omit those who manage fine by mapping the
+ * Unicode representation.
+ *
+ * See https://www.w3.org/TR/uievents-code/ for possible codes.
+ * See https://www.w3.org/TR/uievents-key/ for possible values.
+ */
+
+/* eslint-disable key-spacing */
+
+export default {
+
+// 3.1.1.1. Writing System Keys
+
+    'Backspace':        'Backspace',
+
+// 3.1.1.2. Functional Keys
+
+    'AltLeft':          'Alt',
+    'AltRight':         'Alt', // This could also be 'AltGraph'
+    'CapsLock':         'CapsLock',
+    'ContextMenu':      'ContextMenu',
+    'ControlLeft':      'Control',
+    'ControlRight':     'Control',
+    'Enter':            'Enter',
+    'MetaLeft':         'Meta',
+    'MetaRight':        'Meta',
+    'ShiftLeft':        'Shift',
+    'ShiftRight':       'Shift',
+    'Tab':              'Tab',
+    // FIXME: Japanese/Korean keys
+
+// 3.1.2. Control Pad Section
+
+    'Delete':           'Delete',
+    'End':              'End',
+    'Help':             'Help',
+    'Home':             'Home',
+    'Insert':           'Insert',
+    'PageDown':         'PageDown',
+    'PageUp':           'PageUp',
+
+// 3.1.3. Arrow Pad Section
+
+    'ArrowDown':        'ArrowDown',
+    'ArrowLeft':        'ArrowLeft',
+    'ArrowRight':       'ArrowRight',
+    'ArrowUp':          'ArrowUp',
+
+// 3.1.4. Numpad Section
+
+    'NumLock':          'NumLock',
+    'NumpadBackspace':  'Backspace',
+    'NumpadClear':      'Clear',
+
+// 3.1.5. Function Section
+
+    'Escape':           'Escape',
+    'F1':               'F1',
+    'F2':               'F2',
+    'F3':               'F3',
+    'F4':               'F4',
+    'F5':               'F5',
+    'F6':               'F6',
+    'F7':               'F7',
+    'F8':               'F8',
+    'F9':               'F9',
+    'F10':              'F10',
+    'F11':              'F11',
+    'F12':              'F12',
+    'F13':              'F13',
+    'F14':              'F14',
+    'F15':              'F15',
+    'F16':              'F16',
+    'F17':              'F17',
+    'F18':              'F18',
+    'F19':              'F19',
+    'F20':              'F20',
+    'F21':              'F21',
+    'F22':              'F22',
+    'F23':              'F23',
+    'F24':              'F24',
+    'F25':              'F25',
+    'F26':              'F26',
+    'F27':              'F27',
+    'F28':              'F28',
+    'F29':              'F29',
+    'F30':              'F30',
+    'F31':              'F31',
+    'F32':              'F32',
+    'F33':              'F33',
+    'F34':              'F34',
+    'F35':              'F35',
+    'PrintScreen':      'PrintScreen',
+    'ScrollLock':       'ScrollLock',
+    'Pause':            'Pause',
+
+// 3.1.6. Media Keys
+
+    'BrowserBack':      'BrowserBack',
+    'BrowserFavorites': 'BrowserFavorites',
+    'BrowserForward':   'BrowserForward',
+    'BrowserHome':      'BrowserHome',
+    'BrowserRefresh':   'BrowserRefresh',
+    'BrowserSearch':    'BrowserSearch',
+    'BrowserStop':      'BrowserStop',
+    'Eject':            'Eject',
+    'LaunchApp1':       'LaunchMyComputer',
+    'LaunchApp2':       'LaunchCalendar',
+    'LaunchMail':       'LaunchMail',
+    'MediaPlayPause':   'MediaPlay',
+    'MediaStop':        'MediaStop',
+    'MediaTrackNext':   'MediaTrackNext',
+    'MediaTrackPrevious': 'MediaTrackPrevious',
+    'Power':            'Power',
+    'Sleep':            'Sleep',
+    'AudioVolumeDown':  'AudioVolumeDown',
+    'AudioVolumeMute':  'AudioVolumeMute',
+    'AudioVolumeUp':    'AudioVolumeUp',
+    'WakeUp':           'WakeUp',
+};

static/novnc/core/input/gesturehandler.js

@@ -0,0 +1,567 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2020 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ *
+ */
+
+const GH_NOGESTURE = 0;
+const GH_ONETAP    = 1;
+const GH_TWOTAP    = 2;
+const GH_THREETAP  = 4;
+const GH_DRAG      = 8;
+const GH_LONGPRESS = 16;
+const GH_TWODRAG   = 32;
+const GH_PINCH     = 64;
+
+const GH_INITSTATE = 127;
+
+const GH_MOVE_THRESHOLD = 50;
+const GH_ANGLE_THRESHOLD = 90; // Degrees
+
+// Timeout when waiting for gestures (ms)
+const GH_MULTITOUCH_TIMEOUT = 250;
+
+// Maximum time between press and release for a tap (ms)
+const GH_TAP_TIMEOUT = 1000;
+
+// Timeout when waiting for longpress (ms)
+const GH_LONGPRESS_TIMEOUT = 1000;
+
+// Timeout when waiting to decide between PINCH and TWODRAG (ms)
+const GH_TWOTOUCH_TIMEOUT = 50;
+
+export default class GestureHandler {
+    constructor() {
+        this._target = null;
+
+        this._state = GH_INITSTATE;
+
+        this._tracked = [];
+        this._ignored = [];
+
+        this._waitingRelease = false;
+        this._releaseStart = 0.0;
+
+        this._longpressTimeoutId = null;
+        this._twoTouchTimeoutId = null;
+
+        this._boundEventHandler = this._eventHandler.bind(this);
+    }
+
+    attach(target) {
+        this.detach();
+
+        this._target = target;
+        this._target.addEventListener('touchstart',
+                                      this._boundEventHandler);
+        this._target.addEventListener('touchmove',
+                                      this._boundEventHandler);
+        this._target.addEventListener('touchend',
+                                      this._boundEventHandler);
+        this._target.addEventListener('touchcancel',
+                                      this._boundEventHandler);
+    }
+
+    detach() {
+        if (!this._target) {
+            return;
+        }
+
+        this._stopLongpressTimeout();
+        this._stopTwoTouchTimeout();
+
+        this._target.removeEventListener('touchstart',
+                                         this._boundEventHandler);
+        this._target.removeEventListener('touchmove',
+                                         this._boundEventHandler);
+        this._target.removeEventListener('touchend',
+                                         this._boundEventHandler);
+        this._target.removeEventListener('touchcancel',
+                                         this._boundEventHandler);
+        this._target = null;
+    }
+
+    _eventHandler(e) {
+        let fn;
+
+        e.stopPropagation();
+        e.preventDefault();
+
+        switch (e.type) {
+            case 'touchstart':
+                fn = this._touchStart;
+                break;
+            case 'touchmove':
+                fn = this._touchMove;
+                break;
+            case 'touchend':
+            case 'touchcancel':
+                fn = this._touchEnd;
+                break;
+        }
+
+        for (let i = 0; i < e.changedTouches.length; i++) {
+            let touch = e.changedTouches[i];
+            fn.call(this, touch.identifier, touch.clientX, touch.clientY);
+        }
+    }
+
+    _touchStart(id, x, y) {
+        // Ignore any new touches if there is already an active gesture,
+        // or we're in a cleanup state
+        if (this._hasDetectedGesture() || (this._state === GH_NOGESTURE)) {
+            this._ignored.push(id);
+            return;
+        }
+
+        // Did it take too long between touches that we should no longer
+        // consider this a single gesture?
+        if ((this._tracked.length > 0) &&
+            ((Date.now() - this._tracked[0].started) > GH_MULTITOUCH_TIMEOUT)) {
+            this._state = GH_NOGESTURE;
+            this._ignored.push(id);
+            return;
+        }
+
+        // If we're waiting for fingers to release then we should no longer
+        // recognize new touches
+        if (this._waitingRelease) {
+            this._state = GH_NOGESTURE;
+            this._ignored.push(id);
+            return;
+        }
+
+        this._tracked.push({
+            id: id,
+            started: Date.now(),
+            active: true,
+            firstX: x,
+            firstY: y,
+            lastX: x,
+            lastY: y,
+            angle: 0
+        });
+
+        switch (this._tracked.length) {
+            case 1:
+                this._startLongpressTimeout();
+                break;
+
+            case 2:
+                this._state &= ~(GH_ONETAP | GH_DRAG | GH_LONGPRESS);
+                this._stopLongpressTimeout();
+                break;
+
+            case 3:
+                this._state &= ~(GH_TWOTAP | GH_TWODRAG | GH_PINCH);
+                break;
+
+            default:
+                this._state = GH_NOGESTURE;
+        }
+    }
+
+    _touchMove(id, x, y) {
+        let touch = this._tracked.find(t => t.id === id);
+
+        // If this is an update for a touch we're not tracking, ignore it
+        if (touch === undefined) {
+            return;
+        }
+
+        // Update the touches last position with the event coordinates
+        touch.lastX = x;
+        touch.lastY = y;
+
+        let deltaX = x - touch.firstX;
+        let deltaY = y - touch.firstY;
+
+        // Update angle when the touch has moved
+        if ((touch.firstX !== touch.lastX) ||
+            (touch.firstY !== touch.lastY)) {
+            touch.angle = Math.atan2(deltaY, deltaX) * 180 / Math.PI;
+        }
+
+        if (!this._hasDetectedGesture()) {
+            // Ignore moves smaller than the minimum threshold
+            if (Math.hypot(deltaX, deltaY) < GH_MOVE_THRESHOLD) {
+                return;
+            }
+
+            // Can't be a tap or long press as we've seen movement
+            this._state &= ~(GH_ONETAP | GH_TWOTAP | GH_THREETAP | GH_LONGPRESS);
+            this._stopLongpressTimeout();
+
+            if (this._tracked.length !== 1) {
+                this._state &= ~(GH_DRAG);
+            }
+            if (this._tracked.length !== 2) {
+                this._state &= ~(GH_TWODRAG | GH_PINCH);
+            }
+
+            // We need to figure out which of our different two touch gestures
+            // this might be
+            if (this._tracked.length === 2) {
+
+                // The other touch is the one where the id doesn't match
+                let prevTouch = this._tracked.find(t => t.id !== id);
+
+                // How far the previous touch point has moved since start
+                let prevDeltaMove = Math.hypot(prevTouch.firstX - prevTouch.lastX,
+                                               prevTouch.firstY - prevTouch.lastY);
+
+                // We know that the current touch moved far enough,
+                // but unless both touches moved further than their
+                // threshold we don't want to disqualify any gestures
+                if (prevDeltaMove > GH_MOVE_THRESHOLD) {
+
+                    // The angle difference between the direction of the touch points
+                    let deltaAngle = Math.abs(touch.angle - prevTouch.angle);
+                    deltaAngle = Math.abs(((deltaAngle + 180) % 360) - 180);
+
+                    // PINCH or TWODRAG can be eliminated depending on the angle
+                    if (deltaAngle > GH_ANGLE_THRESHOLD) {
+                        this._state &= ~GH_TWODRAG;
+                    } else {
+                        this._state &= ~GH_PINCH;
+                    }
+
+                    if (this._isTwoTouchTimeoutRunning()) {
+                        this._stopTwoTouchTimeout();
+                    }
+                } else if (!this._isTwoTouchTimeoutRunning()) {
+                    // We can't determine the gesture right now, let's
+                    // wait and see if more events are on their way
+                    this._startTwoTouchTimeout();
+                }
+            }
+
+            if (!this._hasDetectedGesture()) {
+                return;
+            }
+
+            this._pushEvent('gesturestart');
+        }
+
+        this._pushEvent('gesturemove');
+    }
+
+    _touchEnd(id, x, y) {
+        // Check if this is an ignored touch
+        if (this._ignored.indexOf(id) !== -1) {
+            // Remove this touch from ignored
+            this._ignored.splice(this._ignored.indexOf(id), 1);
+
+            // And reset the state if there are no more touches
+            if ((this._ignored.length === 0) &&
+                (this._tracked.length === 0)) {
+                this._state = GH_INITSTATE;
+                this._waitingRelease = false;
+            }
+            return;
+        }
+
+        // We got a touchend before the timer triggered,
+        // this cannot result in a gesture anymore.
+        if (!this._hasDetectedGesture() &&
+            this._isTwoTouchTimeoutRunning()) {
+            this._stopTwoTouchTimeout();
+            this._state = GH_NOGESTURE;
+        }
+
+        // Some gestures don't trigger until a touch is released
+        if (!this._hasDetectedGesture()) {
+            // Can't be a gesture that relies on movement
+            this._state &= ~(GH_DRAG | GH_TWODRAG | GH_PINCH);
+            // Or something that relies on more time
+            this._state &= ~GH_LONGPRESS;
+            this._stopLongpressTimeout();
+
+            if (!this._waitingRelease) {
+                this._releaseStart = Date.now();
+                this._waitingRelease = true;
+
+                // Can't be a tap that requires more touches than we current have
+                switch (this._tracked.length) {
+                    case 1:
+                        this._state &= ~(GH_TWOTAP | GH_THREETAP);
+                        break;
+
+                    case 2:
+                        this._state &= ~(GH_ONETAP | GH_THREETAP);
+                        break;
+                }
+            }
+        }
+
+        // Waiting for all touches to release? (i.e. some tap)
+        if (this._waitingRelease) {
+            // Were all touches released at roughly the same time?
+            if ((Date.now() - this._releaseStart) > GH_MULTITOUCH_TIMEOUT) {
+                this._state = GH_NOGESTURE;
+            }
+
+            // Did too long time pass between press and release?
+            if (this._tracked.some(t => (Date.now() - t.started) > GH_TAP_TIMEOUT)) {
+                this._state = GH_NOGESTURE;
+            }
+
+            let touch = this._tracked.find(t => t.id === id);
+            touch.active = false;
+
+            // Are we still waiting for more releases?
+            if (this._hasDetectedGesture()) {
+                this._pushEvent('gesturestart');
+            } else {
+                // Have we reached a dead end?
+                if (this._state !== GH_NOGESTURE) {
+                    return;
+                }
+            }
+        }
+
+        if (this._hasDetectedGesture()) {
+            this._pushEvent('gestureend');
+        }
+
+        // Ignore any remaining touches until they are ended
+        for (let i = 0; i < this._tracked.length; i++) {
+            if (this._tracked[i].active) {
+                this._ignored.push(this._tracked[i].id);
+            }
+        }
+        this._tracked = [];
+
+        this._state = GH_NOGESTURE;
+
+        // Remove this touch from ignored if it's in there
+        if (this._ignored.indexOf(id) !== -1) {
+            this._ignored.splice(this._ignored.indexOf(id), 1);
+        }
+
+        // We reset the state if ignored is empty
+        if ((this._ignored.length === 0)) {
+            this._state = GH_INITSTATE;
+            this._waitingRelease = false;
+        }
+    }
+
+    _hasDetectedGesture() {
+        if (this._state === GH_NOGESTURE) {
+            return false;
+        }
+        // Check to see if the bitmask value is a power of 2
+        // (i.e. only one bit set). If it is, we have a state.
+        if (this._state & (this._state - 1)) {
+            return false;
+        }
+
+        // For taps we also need to have all touches released
+        // before we've fully detected the gesture
+        if (this._state & (GH_ONETAP | GH_TWOTAP | GH_THREETAP)) {
+            if (this._tracked.some(t => t.active)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    _startLongpressTimeout() {
+        this._stopLongpressTimeout();
+        this._longpressTimeoutId = setTimeout(() => this._longpressTimeout(),
+                                              GH_LONGPRESS_TIMEOUT);
+    }
+
+    _stopLongpressTimeout() {
+        clearTimeout(this._longpressTimeoutId);
+        this._longpressTimeoutId = null;
+    }
+
+    _longpressTimeout() {
+        if (this._hasDetectedGesture()) {
+            throw new Error("A longpress gesture failed, conflict with a different gesture");
+        }
+
+        this._state = GH_LONGPRESS;
+        this._pushEvent('gesturestart');
+    }
+
+    _startTwoTouchTimeout() {
+        this._stopTwoTouchTimeout();
+        this._twoTouchTimeoutId = setTimeout(() => this._twoTouchTimeout(),
+                                             GH_TWOTOUCH_TIMEOUT);
+    }
+
+    _stopTwoTouchTimeout() {
+        clearTimeout(this._twoTouchTimeoutId);
+        this._twoTouchTimeoutId = null;
+    }
+
+    _isTwoTouchTimeoutRunning() {
+        return this._twoTouchTimeoutId !== null;
+    }
+
+    _twoTouchTimeout() {
+        if (this._tracked.length === 0) {
+            throw new Error("A pinch or two drag gesture failed, no tracked touches");
+        }
+
+        // How far each touch point has moved since start
+        let avgM = this._getAverageMovement();
+        let avgMoveH = Math.abs(avgM.x);
+        let avgMoveV = Math.abs(avgM.y);
+
+        // The difference in the distance between where
+        // the touch points started and where they are now
+        let avgD = this._getAverageDistance();
+        let deltaTouchDistance = Math.abs(Math.hypot(avgD.first.x, avgD.first.y) -
+                                          Math.hypot(avgD.last.x, avgD.last.y));
+
+        if ((avgMoveV < deltaTouchDistance) &&
+            (avgMoveH < deltaTouchDistance)) {
+            this._state = GH_PINCH;
+        } else {
+            this._state = GH_TWODRAG;
+        }
+
+        this._pushEvent('gesturestart');
+        this._pushEvent('gesturemove');
+    }
+
+    _pushEvent(type) {
+        let detail = { type: this._stateToGesture(this._state) };
+
+        // For most gesture events the current (average) position is the
+        // most useful
+        let avg = this._getPosition();
+        let pos = avg.last;
+
+        // However we have a slight distance to detect gestures, so for the
+        // first gesture event we want to use the first positions we saw
+        if (type === 'gesturestart') {
+            pos = avg.first;
+        }
+
+        // For these gestures, we always want the event coordinates
+        // to be where the gesture began, not the current touch location.
+        switch (this._state) {
+            case GH_TWODRAG:
+            case GH_PINCH:
+                pos = avg.first;
+                break;
+        }
+
+        detail['clientX'] = pos.x;
+        detail['clientY'] = pos.y;
+
+        // FIXME: other coordinates?
+
+        // Some gestures also have a magnitude
+        if (this._state === GH_PINCH) {
+            let distance = this._getAverageDistance();
+            if (type === 'gesturestart') {
+                detail['magnitudeX'] = distance.first.x;
+                detail['magnitudeY'] = distance.first.y;
+            } else {
+                detail['magnitudeX'] = distance.last.x;
+                detail['magnitudeY'] = distance.last.y;
+            }
+        } else if (this._state === GH_TWODRAG) {
+            if (type === 'gesturestart') {
+                detail['magnitudeX'] = 0.0;
+                detail['magnitudeY'] = 0.0;
+            } else {
+                let movement = this._getAverageMovement();
+                detail['magnitudeX'] = movement.x;
+                detail['magnitudeY'] = movement.y;
+            }
+        }
+
+        let gev = new CustomEvent(type, { detail: detail });
+        this._target.dispatchEvent(gev);
+    }
+
+    _stateToGesture(state) {
+        switch (state) {
+            case GH_ONETAP:
+                return 'onetap';
+            case GH_TWOTAP:
+                return 'twotap';
+            case GH_THREETAP:
+                return 'threetap';
+            case GH_DRAG:
+                return 'drag';
+            case GH_LONGPRESS:
+                return 'longpress';
+            case GH_TWODRAG:
+                return 'twodrag';
+            case GH_PINCH:
+                return 'pinch';
+        }
+
+        throw new Error("Unknown gesture state: " + state);
+    }
+
+    _getPosition() {
+        if (this._tracked.length === 0) {
+            throw new Error("Failed to get gesture position, no tracked touches");
+        }
+
+        let size = this._tracked.length;
+        let fx = 0, fy = 0, lx = 0, ly = 0;
+
+        for (let i = 0; i < this._tracked.length; i++) {
+            fx += this._tracked[i].firstX;
+            fy += this._tracked[i].firstY;
+            lx += this._tracked[i].lastX;
+            ly += this._tracked[i].lastY;
+        }
+
+        return { first: { x: fx / size,
+                          y: fy / size },
+                 last: { x: lx / size,
+                         y: ly / size } };
+    }
+
+    _getAverageMovement() {
+        if (this._tracked.length === 0) {
+            throw new Error("Failed to get gesture movement, no tracked touches");
+        }
+
+        let totalH, totalV;
+        totalH = totalV = 0;
+        let size = this._tracked.length;
+
+        for (let i = 0; i < this._tracked.length; i++) {
+            totalH += this._tracked[i].lastX - this._tracked[i].firstX;
+            totalV += this._tracked[i].lastY - this._tracked[i].firstY;
+        }
+
+        return { x: totalH / size,
+                 y: totalV / size };
+    }
+
+    _getAverageDistance() {
+        if (this._tracked.length === 0) {
+            throw new Error("Failed to get gesture distance, no tracked touches");
+        }
+
+        // Distance between the first and last tracked touches
+
+        let first = this._tracked[0];
+        let last = this._tracked[this._tracked.length - 1];
+
+        let fdx = Math.abs(last.firstX - first.firstX);
+        let fdy = Math.abs(last.firstY - first.firstY);
+
+        let ldx = Math.abs(last.lastX - first.lastX);
+        let ldy = Math.abs(last.lastY - first.lastY);
+
+        return { first: { x: fdx, y: fdy },
+                 last: { x: ldx, y: ldy } };
+    }
+}

static/novnc/core/input/keyboard.js

@@ -0,0 +1,273 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 or any later version (see LICENSE.txt)
+ */
+
+import * as Log from '../util/logging.js';
+import { stopEvent } from '../util/events.js';
+import * as KeyboardUtil from "./util.js";
+import KeyTable from "./keysym.js";
+import * as browser from "../util/browser.js";
+
+//
+// Keyboard event handler
+//
+
+export default class Keyboard {
+    constructor(target) {
+        this._target = target || null;
+
+        this._keyDownList = {};         // List of depressed keys
+                                        // (even if they are happy)
+        this._altGrArmed = false;       // Windows AltGr detection
+
+        // keep these here so we can refer to them later
+        this._eventHandlers = {
+            'keyup': this._handleKeyUp.bind(this),
+            'keydown': this._handleKeyDown.bind(this),
+            'blur': this._allKeysUp.bind(this),
+        };
+
+        // ===== EVENT HANDLERS =====
+
+        this.onkeyevent = () => {}; // Handler for key press/release
+    }
+
+    // ===== PRIVATE METHODS =====
+
+    _sendKeyEvent(keysym, code, down) {
+        if (down) {
+            this._keyDownList[code] = keysym;
+        } else {
+            // Do we really think this key is down?
+            if (!(code in this._keyDownList)) {
+                return;
+            }
+            delete this._keyDownList[code];
+        }
+
+        Log.Debug("onkeyevent " + (down ? "down" : "up") +
+                  ", keysym: " + keysym, ", code: " + code);
+        this.onkeyevent(keysym, code, down);
+    }
+
+    _getKeyCode(e) {
+        const code = KeyboardUtil.getKeycode(e);
+        if (code !== 'Unidentified') {
+            return code;
+        }
+
+        // Unstable, but we don't have anything else to go on
+        if (e.keyCode) {
+            // 229 is used for composition events
+            if (e.keyCode !== 229) {
+                return 'Platform' + e.keyCode;
+            }
+        }
+
+        // A precursor to the final DOM3 standard. Unfortunately it
+        // is not layout independent, so it is as bad as using keyCode
+        if (e.keyIdentifier) {
+            // Non-character key?
+            if (e.keyIdentifier.substr(0, 2) !== 'U+') {
+                return e.keyIdentifier;
+            }
+
+            const codepoint = parseInt(e.keyIdentifier.substr(2), 16);
+            const char = String.fromCharCode(codepoint).toUpperCase();
+
+            return 'Platform' + char.charCodeAt();
+        }
+
+        return 'Unidentified';
+    }
+
+    _handleKeyDown(e) {
+        const code = this._getKeyCode(e);
+        let keysym = KeyboardUtil.getKeysym(e);
+
+        // Windows doesn't have a proper AltGr, but handles it using
+        // fake Ctrl+Alt. However the remote end might not be Windows,
+        // so we need to merge those in to a single AltGr event. We
+        // detect this case by seeing the two key events directly after
+        // each other with a very short time between them (<50ms).
+        if (this._altGrArmed) {
+            this._altGrArmed = false;
+            clearTimeout(this._altGrTimeout);
+
+            if ((code === "AltRight") &&
+                ((e.timeStamp - this._altGrCtrlTime) < 50)) {
+                // FIXME: We fail to detect this if either Ctrl key is
+                //        first manually pressed as Windows then no
+                //        longer sends the fake Ctrl down event. It
+                //        does however happily send real Ctrl events
+                //        even when AltGr is already down. Some
+                //        browsers detect this for us though and set the
+                //        key to "AltGraph".
+                keysym = KeyTable.XK_ISO_Level3_Shift;
+            } else {
+                this._sendKeyEvent(KeyTable.XK_Control_L, "ControlLeft", true);
+            }
+        }
+
+        // We cannot handle keys we cannot track, but we also need
+        // to deal with virtual keyboards which omit key info
+        if (code === 'Unidentified') {
+            if (keysym) {
+                // If it's a virtual keyboard then it should be
+                // sufficient to just send press and release right
+                // after each other
+                this._sendKeyEvent(keysym, code, true);
+                this._sendKeyEvent(keysym, code, false);
+            }
+
+            stopEvent(e);
+            return;
+        }
+
+        // Alt behaves more like AltGraph on macOS, so shuffle the
+        // keys around a bit to make things more sane for the remote
+        // server. This method is used by RealVNC and TigerVNC (and
+        // possibly others).
+        if (browser.isMac() || browser.isIOS()) {
+            switch (keysym) {
+                case KeyTable.XK_Super_L:
+                    keysym = KeyTable.XK_Alt_L;
+                    break;
+                case KeyTable.XK_Super_R:
+                    keysym = KeyTable.XK_Super_L;
+                    break;
+                case KeyTable.XK_Alt_L:
+                    keysym = KeyTable.XK_Mode_switch;
+                    break;
+                case KeyTable.XK_Alt_R:
+                    keysym = KeyTable.XK_ISO_Level3_Shift;
+                    break;
+            }
+        }
+
+        // Is this key already pressed? If so, then we must use the
+        // same keysym or we'll confuse the server
+        if (code in this._keyDownList) {
+            keysym = this._keyDownList[code];
+        }
+
+        // macOS doesn't send proper key events for modifiers, only
+        // state change events. That gets extra confusing for CapsLock
+        // which toggles on each press, but not on release. So pretend
+        // it was a quick press and release of the button.
+        if ((browser.isMac() || browser.isIOS()) && (code === 'CapsLock')) {
+            this._sendKeyEvent(KeyTable.XK_Caps_Lock, 'CapsLock', true);
+            this._sendKeyEvent(KeyTable.XK_Caps_Lock, 'CapsLock', false);
+            stopEvent(e);
+            return;
+        }
+
+        // Windows doesn't send proper key releases for a bunch of
+        // Japanese IM keys so we have to fake the release right away
+        const jpBadKeys = [ KeyTable.XK_Zenkaku_Hankaku,
+                            KeyTable.XK_Eisu_toggle,
+                            KeyTable.XK_Katakana,
+                            KeyTable.XK_Hiragana,
+                            KeyTable.XK_Romaji ];
+        if (browser.isWindows() && jpBadKeys.includes(keysym)) {
+            this._sendKeyEvent(keysym, code, true);
+            this._sendKeyEvent(keysym, code, false);
+            stopEvent(e);
+            return;
+        }
+
+        stopEvent(e);
+
+        // Possible start of AltGr sequence? (see above)
+        if ((code === "ControlLeft") && browser.isWindows() &&
+            !("ControlLeft" in this._keyDownList)) {
+            this._altGrArmed = true;
+            this._altGrTimeout = setTimeout(this._handleAltGrTimeout.bind(this), 100);
+            this._altGrCtrlTime = e.timeStamp;
+            return;
+        }
+
+        this._sendKeyEvent(keysym, code, true);
+    }
+
+    _handleKeyUp(e) {
+        stopEvent(e);
+
+        const code = this._getKeyCode(e);
+
+        // We can't get a release in the middle of an AltGr sequence, so
+        // abort that detection
+        if (this._altGrArmed) {
+            this._altGrArmed = false;
+            clearTimeout(this._altGrTimeout);
+            this._sendKeyEvent(KeyTable.XK_Control_L, "ControlLeft", true);
+        }
+
+        // See comment in _handleKeyDown()
+        if ((browser.isMac() || browser.isIOS()) && (code === 'CapsLock')) {
+            this._sendKeyEvent(KeyTable.XK_Caps_Lock, 'CapsLock', true);
+            this._sendKeyEvent(KeyTable.XK_Caps_Lock, 'CapsLock', false);
+            return;
+        }
+
+        this._sendKeyEvent(this._keyDownList[code], code, false);
+
+        // Windows has a rather nasty bug where it won't send key
+        // release events for a Shift button if the other Shift is still
+        // pressed
+        if (browser.isWindows() && ((code === 'ShiftLeft') ||
+                                    (code === 'ShiftRight'))) {
+            if ('ShiftRight' in this._keyDownList) {
+                this._sendKeyEvent(this._keyDownList['ShiftRight'],
+                                   'ShiftRight', false);
+            }
+            if ('ShiftLeft' in this._keyDownList) {
+                this._sendKeyEvent(this._keyDownList['ShiftLeft'],
+                                   'ShiftLeft', false);
+            }
+        }
+    }
+
+    _handleAltGrTimeout() {
+        this._altGrArmed = false;
+        clearTimeout(this._altGrTimeout);
+        this._sendKeyEvent(KeyTable.XK_Control_L, "ControlLeft", true);
+    }
+
+    _allKeysUp() {
+        Log.Debug(">> Keyboard.allKeysUp");
+        for (let code in this._keyDownList) {
+            this._sendKeyEvent(this._keyDownList[code], code, false);
+        }
+        Log.Debug("<< Keyboard.allKeysUp");
+    }
+
+    // ===== PUBLIC METHODS =====
+
+    grab() {
+        //Log.Debug(">> Keyboard.grab");
+
+        this._target.addEventListener('keydown', this._eventHandlers.keydown);
+        this._target.addEventListener('keyup', this._eventHandlers.keyup);
+
+        // Release (key up) if window loses focus
+        window.addEventListener('blur', this._eventHandlers.blur);
+
+        //Log.Debug("<< Keyboard.grab");
+    }
+
+    ungrab() {
+        //Log.Debug(">> Keyboard.ungrab");
+
+        this._target.removeEventListener('keydown', this._eventHandlers.keydown);
+        this._target.removeEventListener('keyup', this._eventHandlers.keyup);
+        window.removeEventListener('blur', this._eventHandlers.blur);
+
+        // Release (key up) all keys that are in a down state
+        this._allKeysUp();
+
+        //Log.Debug(">> Keyboard.ungrab");
+    }
+}

static/novnc/core/input/keysym.js

@@ -0,0 +1,616 @@
+/* eslint-disable key-spacing */
+
+export default {
+    XK_VoidSymbol:                  0xffffff, /* Void symbol */
+
+    XK_BackSpace:                   0xff08, /* Back space, back char */
+    XK_Tab:                         0xff09,
+    XK_Linefeed:                    0xff0a, /* Linefeed, LF */
+    XK_Clear:                       0xff0b,
+    XK_Return:                      0xff0d, /* Return, enter */
+    XK_Pause:                       0xff13, /* Pause, hold */
+    XK_Scroll_Lock:                 0xff14,
+    XK_Sys_Req:                     0xff15,
+    XK_Escape:                      0xff1b,
+    XK_Delete:                      0xffff, /* Delete, rubout */
+
+    /* International & multi-key character composition */
+
+    XK_Multi_key:                   0xff20, /* Multi-key character compose */
+    XK_Codeinput:                   0xff37,
+    XK_SingleCandidate:             0xff3c,
+    XK_MultipleCandidate:           0xff3d,
+    XK_PreviousCandidate:           0xff3e,
+
+    /* Japanese keyboard support */
+
+    XK_Kanji:                       0xff21, /* Kanji, Kanji convert */
+    XK_Muhenkan:                    0xff22, /* Cancel Conversion */
+    XK_Henkan_Mode:                 0xff23, /* Start/Stop Conversion */
+    XK_Henkan:                      0xff23, /* Alias for Henkan_Mode */
+    XK_Romaji:                      0xff24, /* to Romaji */
+    XK_Hiragana:                    0xff25, /* to Hiragana */
+    XK_Katakana:                    0xff26, /* to Katakana */
+    XK_Hiragana_Katakana:           0xff27, /* Hiragana/Katakana toggle */
+    XK_Zenkaku:                     0xff28, /* to Zenkaku */
+    XK_Hankaku:                     0xff29, /* to Hankaku */
+    XK_Zenkaku_Hankaku:             0xff2a, /* Zenkaku/Hankaku toggle */
+    XK_Touroku:                     0xff2b, /* Add to Dictionary */
+    XK_Massyo:                      0xff2c, /* Delete from Dictionary */
+    XK_Kana_Lock:                   0xff2d, /* Kana Lock */
+    XK_Kana_Shift:                  0xff2e, /* Kana Shift */
+    XK_Eisu_Shift:                  0xff2f, /* Alphanumeric Shift */
+    XK_Eisu_toggle:                 0xff30, /* Alphanumeric toggle */
+    XK_Kanji_Bangou:                0xff37, /* Codeinput */
+    XK_Zen_Koho:                    0xff3d, /* Multiple/All Candidate(s) */
+    XK_Mae_Koho:                    0xff3e, /* Previous Candidate */
+
+    /* Cursor control & motion */
+
+    XK_Home:                        0xff50,
+    XK_Left:                        0xff51, /* Move left, left arrow */
+    XK_Up:                          0xff52, /* Move up, up arrow */
+    XK_Right:                       0xff53, /* Move right, right arrow */
+    XK_Down:                        0xff54, /* Move down, down arrow */
+    XK_Prior:                       0xff55, /* Prior, previous */
+    XK_Page_Up:                     0xff55,
+    XK_Next:                        0xff56, /* Next */
+    XK_Page_Down:                   0xff56,
+    XK_End:                         0xff57, /* EOL */
+    XK_Begin:                       0xff58, /* BOL */
+
+
+    /* Misc functions */
+
+    XK_Select:                      0xff60, /* Select, mark */
+    XK_Print:                       0xff61,
+    XK_Execute:                     0xff62, /* Execute, run, do */
+    XK_Insert:                      0xff63, /* Insert, insert here */
+    XK_Undo:                        0xff65,
+    XK_Redo:                        0xff66, /* Redo, again */
+    XK_Menu:                        0xff67,
+    XK_Find:                        0xff68, /* Find, search */
+    XK_Cancel:                      0xff69, /* Cancel, stop, abort, exit */
+    XK_Help:                        0xff6a, /* Help */
+    XK_Break:                       0xff6b,
+    XK_Mode_switch:                 0xff7e, /* Character set switch */
+    XK_script_switch:               0xff7e, /* Alias for mode_switch */
+    XK_Num_Lock:                    0xff7f,
+
+    /* Keypad functions, keypad numbers cleverly chosen to map to ASCII */
+
+    XK_KP_Space:                    0xff80, /* Space */
+    XK_KP_Tab:                      0xff89,
+    XK_KP_Enter:                    0xff8d, /* Enter */
+    XK_KP_F1:                       0xff91, /* PF1, KP_A, ... */
+    XK_KP_F2:                       0xff92,
+    XK_KP_F3:                       0xff93,
+    XK_KP_F4:                       0xff94,
+    XK_KP_Home:                     0xff95,
+    XK_KP_Left:                     0xff96,
+    XK_KP_Up:                       0xff97,
+    XK_KP_Right:                    0xff98,
+    XK_KP_Down:                     0xff99,
+    XK_KP_Prior:                    0xff9a,
+    XK_KP_Page_Up:                  0xff9a,
+    XK_KP_Next:                     0xff9b,
+    XK_KP_Page_Down:                0xff9b,
+    XK_KP_End:                      0xff9c,
+    XK_KP_Begin:                    0xff9d,
+    XK_KP_Insert:                   0xff9e,
+    XK_KP_Delete:                   0xff9f,
+    XK_KP_Equal:                    0xffbd, /* Equals */
+    XK_KP_Multiply:                 0xffaa,
+    XK_KP_Add:                      0xffab,
+    XK_KP_Separator:                0xffac, /* Separator, often comma */
+    XK_KP_Subtract:                 0xffad,
+    XK_KP_Decimal:                  0xffae,
+    XK_KP_Divide:                   0xffaf,
+
+    XK_KP_0:                        0xffb0,
+    XK_KP_1:                        0xffb1,
+    XK_KP_2:                        0xffb2,
+    XK_KP_3:                        0xffb3,
+    XK_KP_4:                        0xffb4,
+    XK_KP_5:                        0xffb5,
+    XK_KP_6:                        0xffb6,
+    XK_KP_7:                        0xffb7,
+    XK_KP_8:                        0xffb8,
+    XK_KP_9:                        0xffb9,
+
+    /*
+     * Auxiliary functions; note the duplicate definitions for left and right
+     * function keys;  Sun keyboards and a few other manufacturers have such
+     * function key groups on the left and/or right sides of the keyboard.
+     * We've not found a keyboard with more than 35 function keys total.
+     */
+
+    XK_F1:                          0xffbe,
+    XK_F2:                          0xffbf,
+    XK_F3:                          0xffc0,
+    XK_F4:                          0xffc1,
+    XK_F5:                          0xffc2,
+    XK_F6:                          0xffc3,
+    XK_F7:                          0xffc4,
+    XK_F8:                          0xffc5,
+    XK_F9:                          0xffc6,
+    XK_F10:                         0xffc7,
+    XK_F11:                         0xffc8,
+    XK_L1:                          0xffc8,
+    XK_F12:                         0xffc9,
+    XK_L2:                          0xffc9,
+    XK_F13:                         0xffca,
+    XK_L3:                          0xffca,
+    XK_F14:                         0xffcb,
+    XK_L4:                          0xffcb,
+    XK_F15:                         0xffcc,
+    XK_L5:                          0xffcc,
+    XK_F16:                         0xffcd,
+    XK_L6:                          0xffcd,
+    XK_F17:                         0xffce,
+    XK_L7:                          0xffce,
+    XK_F18:                         0xffcf,
+    XK_L8:                          0xffcf,
+    XK_F19:                         0xffd0,
+    XK_L9:                          0xffd0,
+    XK_F20:                         0xffd1,
+    XK_L10:                         0xffd1,
+    XK_F21:                         0xffd2,
+    XK_R1:                          0xffd2,
+    XK_F22:                         0xffd3,
+    XK_R2:                          0xffd3,
+    XK_F23:                         0xffd4,
+    XK_R3:                          0xffd4,
+    XK_F24:                         0xffd5,
+    XK_R4:                          0xffd5,
+    XK_F25:                         0xffd6,
+    XK_R5:                          0xffd6,
+    XK_F26:                         0xffd7,
+    XK_R6:                          0xffd7,
+    XK_F27:                         0xffd8,
+    XK_R7:                          0xffd8,
+    XK_F28:                         0xffd9,
+    XK_R8:                          0xffd9,
+    XK_F29:                         0xffda,
+    XK_R9:                          0xffda,
+    XK_F30:                         0xffdb,
+    XK_R10:                         0xffdb,
+    XK_F31:                         0xffdc,
+    XK_R11:                         0xffdc,
+    XK_F32:                         0xffdd,
+    XK_R12:                         0xffdd,
+    XK_F33:                         0xffde,
+    XK_R13:                         0xffde,
+    XK_F34:                         0xffdf,
+    XK_R14:                         0xffdf,
+    XK_F35:                         0xffe0,
+    XK_R15:                         0xffe0,
+
+    /* Modifiers */
+
+    XK_Shift_L:                     0xffe1, /* Left shift */
+    XK_Shift_R:                     0xffe2, /* Right shift */
+    XK_Control_L:                   0xffe3, /* Left control */
+    XK_Control_R:                   0xffe4, /* Right control */
+    XK_Caps_Lock:                   0xffe5, /* Caps lock */
+    XK_Shift_Lock:                  0xffe6, /* Shift lock */
+
+    XK_Meta_L:                      0xffe7, /* Left meta */
+    XK_Meta_R:                      0xffe8, /* Right meta */
+    XK_Alt_L:                       0xffe9, /* Left alt */
+    XK_Alt_R:                       0xffea, /* Right alt */
+    XK_Super_L:                     0xffeb, /* Left super */
+    XK_Super_R:                     0xffec, /* Right super */
+    XK_Hyper_L:                     0xffed, /* Left hyper */
+    XK_Hyper_R:                     0xffee, /* Right hyper */
+
+    /*
+     * Keyboard (XKB) Extension function and modifier keys
+     * (from Appendix C of "The X Keyboard Extension: Protocol Specification")
+     * Byte 3 = 0xfe
+     */
+
+    XK_ISO_Level3_Shift:            0xfe03, /* AltGr */
+    XK_ISO_Next_Group:              0xfe08,
+    XK_ISO_Prev_Group:              0xfe0a,
+    XK_ISO_First_Group:             0xfe0c,
+    XK_ISO_Last_Group:              0xfe0e,
+
+    /*
+     * Latin 1
+     * (ISO/IEC 8859-1: Unicode U+0020..U+00FF)
+     * Byte 3: 0
+     */
+
+    XK_space:                       0x0020, /* U+0020 SPACE */
+    XK_exclam:                      0x0021, /* U+0021 EXCLAMATION MARK */
+    XK_quotedbl:                    0x0022, /* U+0022 QUOTATION MARK */
+    XK_numbersign:                  0x0023, /* U+0023 NUMBER SIGN */
+    XK_dollar:                      0x0024, /* U+0024 DOLLAR SIGN */
+    XK_percent:                     0x0025, /* U+0025 PERCENT SIGN */
+    XK_ampersand:                   0x0026, /* U+0026 AMPERSAND */
+    XK_apostrophe:                  0x0027, /* U+0027 APOSTROPHE */
+    XK_quoteright:                  0x0027, /* deprecated */
+    XK_parenleft:                   0x0028, /* U+0028 LEFT PARENTHESIS */
+    XK_parenright:                  0x0029, /* U+0029 RIGHT PARENTHESIS */
+    XK_asterisk:                    0x002a, /* U+002A ASTERISK */
+    XK_plus:                        0x002b, /* U+002B PLUS SIGN */
+    XK_comma:                       0x002c, /* U+002C COMMA */
+    XK_minus:                       0x002d, /* U+002D HYPHEN-MINUS */
+    XK_period:                      0x002e, /* U+002E FULL STOP */
+    XK_slash:                       0x002f, /* U+002F SOLIDUS */
+    XK_0:                           0x0030, /* U+0030 DIGIT ZERO */
+    XK_1:                           0x0031, /* U+0031 DIGIT ONE */
+    XK_2:                           0x0032, /* U+0032 DIGIT TWO */
+    XK_3:                           0x0033, /* U+0033 DIGIT THREE */
+    XK_4:                           0x0034, /* U+0034 DIGIT FOUR */
+    XK_5:                           0x0035, /* U+0035 DIGIT FIVE */
+    XK_6:                           0x0036, /* U+0036 DIGIT SIX */
+    XK_7:                           0x0037, /* U+0037 DIGIT SEVEN */
+    XK_8:                           0x0038, /* U+0038 DIGIT EIGHT */
+    XK_9:                           0x0039, /* U+0039 DIGIT NINE */
+    XK_colon:                       0x003a, /* U+003A COLON */
+    XK_semicolon:                   0x003b, /* U+003B SEMICOLON */
+    XK_less:                        0x003c, /* U+003C LESS-THAN SIGN */
+    XK_equal:                       0x003d, /* U+003D EQUALS SIGN */
+    XK_greater:                     0x003e, /* U+003E GREATER-THAN SIGN */
+    XK_question:                    0x003f, /* U+003F QUESTION MARK */
+    XK_at:                          0x0040, /* U+0040 COMMERCIAL AT */
+    XK_A:                           0x0041, /* U+0041 LATIN CAPITAL LETTER A */
+    XK_B:                           0x0042, /* U+0042 LATIN CAPITAL LETTER B */
+    XK_C:                           0x0043, /* U+0043 LATIN CAPITAL LETTER C */
+    XK_D:                           0x0044, /* U+0044 LATIN CAPITAL LETTER D */
+    XK_E:                           0x0045, /* U+0045 LATIN CAPITAL LETTER E */
+    XK_F:                           0x0046, /* U+0046 LATIN CAPITAL LETTER F */
+    XK_G:                           0x0047, /* U+0047 LATIN CAPITAL LETTER G */
+    XK_H:                           0x0048, /* U+0048 LATIN CAPITAL LETTER H */
+    XK_I:                           0x0049, /* U+0049 LATIN CAPITAL LETTER I */
+    XK_J:                           0x004a, /* U+004A LATIN CAPITAL LETTER J */
+    XK_K:                           0x004b, /* U+004B LATIN CAPITAL LETTER K */
+    XK_L:                           0x004c, /* U+004C LATIN CAPITAL LETTER L */
+    XK_M:                           0x004d, /* U+004D LATIN CAPITAL LETTER M */
+    XK_N:                           0x004e, /* U+004E LATIN CAPITAL LETTER N */
+    XK_O:                           0x004f, /* U+004F LATIN CAPITAL LETTER O */
+    XK_P:                           0x0050, /* U+0050 LATIN CAPITAL LETTER P */
+    XK_Q:                           0x0051, /* U+0051 LATIN CAPITAL LETTER Q */
+    XK_R:                           0x0052, /* U+0052 LATIN CAPITAL LETTER R */
+    XK_S:                           0x0053, /* U+0053 LATIN CAPITAL LETTER S */
+    XK_T:                           0x0054, /* U+0054 LATIN CAPITAL LETTER T */
+    XK_U:                           0x0055, /* U+0055 LATIN CAPITAL LETTER U */
+    XK_V:                           0x0056, /* U+0056 LATIN CAPITAL LETTER V */
+    XK_W:                           0x0057, /* U+0057 LATIN CAPITAL LETTER W */
+    XK_X:                           0x0058, /* U+0058 LATIN CAPITAL LETTER X */
+    XK_Y:                           0x0059, /* U+0059 LATIN CAPITAL LETTER Y */
+    XK_Z:                           0x005a, /* U+005A LATIN CAPITAL LETTER Z */
+    XK_bracketleft:                 0x005b, /* U+005B LEFT SQUARE BRACKET */
+    XK_backslash:                   0x005c, /* U+005C REVERSE SOLIDUS */
+    XK_bracketright:                0x005d, /* U+005D RIGHT SQUARE BRACKET */
+    XK_asciicircum:                 0x005e, /* U+005E CIRCUMFLEX ACCENT */
+    XK_underscore:                  0x005f, /* U+005F LOW LINE */
+    XK_grave:                       0x0060, /* U+0060 GRAVE ACCENT */
+    XK_quoteleft:                   0x0060, /* deprecated */
+    XK_a:                           0x0061, /* U+0061 LATIN SMALL LETTER A */
+    XK_b:                           0x0062, /* U+0062 LATIN SMALL LETTER B */
+    XK_c:                           0x0063, /* U+0063 LATIN SMALL LETTER C */
+    XK_d:                           0x0064, /* U+0064 LATIN SMALL LETTER D */
+    XK_e:                           0x0065, /* U+0065 LATIN SMALL LETTER E */
+    XK_f:                           0x0066, /* U+0066 LATIN SMALL LETTER F */
+    XK_g:                           0x0067, /* U+0067 LATIN SMALL LETTER G */
+    XK_h:                           0x0068, /* U+0068 LATIN SMALL LETTER H */
+    XK_i:                           0x0069, /* U+0069 LATIN SMALL LETTER I */
+    XK_j:                           0x006a, /* U+006A LATIN SMALL LETTER J */
+    XK_k:                           0x006b, /* U+006B LATIN SMALL LETTER K */
+    XK_l:                           0x006c, /* U+006C LATIN SMALL LETTER L */
+    XK_m:                           0x006d, /* U+006D LATIN SMALL LETTER M */
+    XK_n:                           0x006e, /* U+006E LATIN SMALL LETTER N */
+    XK_o:                           0x006f, /* U+006F LATIN SMALL LETTER O */
+    XK_p:                           0x0070, /* U+0070 LATIN SMALL LETTER P */
+    XK_q:                           0x0071, /* U+0071 LATIN SMALL LETTER Q */
+    XK_r:                           0x0072, /* U+0072 LATIN SMALL LETTER R */
+    XK_s:                           0x0073, /* U+0073 LATIN SMALL LETTER S */
+    XK_t:                           0x0074, /* U+0074 LATIN SMALL LETTER T */
+    XK_u:                           0x0075, /* U+0075 LATIN SMALL LETTER U */
+    XK_v:                           0x0076, /* U+0076 LATIN SMALL LETTER V */
+    XK_w:                           0x0077, /* U+0077 LATIN SMALL LETTER W */
+    XK_x:                           0x0078, /* U+0078 LATIN SMALL LETTER X */
+    XK_y:                           0x0079, /* U+0079 LATIN SMALL LETTER Y */
+    XK_z:                           0x007a, /* U+007A LATIN SMALL LETTER Z */
+    XK_braceleft:                   0x007b, /* U+007B LEFT CURLY BRACKET */
+    XK_bar:                         0x007c, /* U+007C VERTICAL LINE */
+    XK_braceright:                  0x007d, /* U+007D RIGHT CURLY BRACKET */
+    XK_asciitilde:                  0x007e, /* U+007E TILDE */
+
+    XK_nobreakspace:                0x00a0, /* U+00A0 NO-BREAK SPACE */
+    XK_exclamdown:                  0x00a1, /* U+00A1 INVERTED EXCLAMATION MARK */
+    XK_cent:                        0x00a2, /* U+00A2 CENT SIGN */
+    XK_sterling:                    0x00a3, /* U+00A3 POUND SIGN */
+    XK_currency:                    0x00a4, /* U+00A4 CURRENCY SIGN */
+    XK_yen:                         0x00a5, /* U+00A5 YEN SIGN */
+    XK_brokenbar:                   0x00a6, /* U+00A6 BROKEN BAR */
+    XK_section:                     0x00a7, /* U+00A7 SECTION SIGN */
+    XK_diaeresis:                   0x00a8, /* U+00A8 DIAERESIS */
+    XK_copyright:                   0x00a9, /* U+00A9 COPYRIGHT SIGN */
+    XK_ordfeminine:                 0x00aa, /* U+00AA FEMININE ORDINAL INDICATOR */
+    XK_guillemotleft:               0x00ab, /* U+00AB LEFT-POINTING DOUBLE ANGLE QUOTATION MARK */
+    XK_notsign:                     0x00ac, /* U+00AC NOT SIGN */
+    XK_hyphen:                      0x00ad, /* U+00AD SOFT HYPHEN */
+    XK_registered:                  0x00ae, /* U+00AE REGISTERED SIGN */
+    XK_macron:                      0x00af, /* U+00AF MACRON */
+    XK_degree:                      0x00b0, /* U+00B0 DEGREE SIGN */
+    XK_plusminus:                   0x00b1, /* U+00B1 PLUS-MINUS SIGN */
+    XK_twosuperior:                 0x00b2, /* U+00B2 SUPERSCRIPT TWO */
+    XK_threesuperior:               0x00b3, /* U+00B3 SUPERSCRIPT THREE */
+    XK_acute:                       0x00b4, /* U+00B4 ACUTE ACCENT */
+    XK_mu:                          0x00b5, /* U+00B5 MICRO SIGN */
+    XK_paragraph:                   0x00b6, /* U+00B6 PILCROW SIGN */
+    XK_periodcentered:              0x00b7, /* U+00B7 MIDDLE DOT */
+    XK_cedilla:                     0x00b8, /* U+00B8 CEDILLA */
+    XK_onesuperior:                 0x00b9, /* U+00B9 SUPERSCRIPT ONE */
+    XK_masculine:                   0x00ba, /* U+00BA MASCULINE ORDINAL INDICATOR */
+    XK_guillemotright:              0x00bb, /* U+00BB RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK */
+    XK_onequarter:                  0x00bc, /* U+00BC VULGAR FRACTION ONE QUARTER */
+    XK_onehalf:                     0x00bd, /* U+00BD VULGAR FRACTION ONE HALF */
+    XK_threequarters:               0x00be, /* U+00BE VULGAR FRACTION THREE QUARTERS */
+    XK_questiondown:                0x00bf, /* U+00BF INVERTED QUESTION MARK */
+    XK_Agrave:                      0x00c0, /* U+00C0 LATIN CAPITAL LETTER A WITH GRAVE */
+    XK_Aacute:                      0x00c1, /* U+00C1 LATIN CAPITAL LETTER A WITH ACUTE */
+    XK_Acircumflex:                 0x00c2, /* U+00C2 LATIN CAPITAL LETTER A WITH CIRCUMFLEX */
+    XK_Atilde:                      0x00c3, /* U+00C3 LATIN CAPITAL LETTER A WITH TILDE */
+    XK_Adiaeresis:                  0x00c4, /* U+00C4 LATIN CAPITAL LETTER A WITH DIAERESIS */
+    XK_Aring:                       0x00c5, /* U+00C5 LATIN CAPITAL LETTER A WITH RING ABOVE */
+    XK_AE:                          0x00c6, /* U+00C6 LATIN CAPITAL LETTER AE */
+    XK_Ccedilla:                    0x00c7, /* U+00C7 LATIN CAPITAL LETTER C WITH CEDILLA */
+    XK_Egrave:                      0x00c8, /* U+00C8 LATIN CAPITAL LETTER E WITH GRAVE */
+    XK_Eacute:                      0x00c9, /* U+00C9 LATIN CAPITAL LETTER E WITH ACUTE */
+    XK_Ecircumflex:                 0x00ca, /* U+00CA LATIN CAPITAL LETTER E WITH CIRCUMFLEX */
+    XK_Ediaeresis:                  0x00cb, /* U+00CB LATIN CAPITAL LETTER E WITH DIAERESIS */
+    XK_Igrave:                      0x00cc, /* U+00CC LATIN CAPITAL LETTER I WITH GRAVE */
+    XK_Iacute:                      0x00cd, /* U+00CD LATIN CAPITAL LETTER I WITH ACUTE */
+    XK_Icircumflex:                 0x00ce, /* U+00CE LATIN CAPITAL LETTER I WITH CIRCUMFLEX */
+    XK_Idiaeresis:                  0x00cf, /* U+00CF LATIN CAPITAL LETTER I WITH DIAERESIS */
+    XK_ETH:                         0x00d0, /* U+00D0 LATIN CAPITAL LETTER ETH */
+    XK_Eth:                         0x00d0, /* deprecated */
+    XK_Ntilde:                      0x00d1, /* U+00D1 LATIN CAPITAL LETTER N WITH TILDE */
+    XK_Ograve:                      0x00d2, /* U+00D2 LATIN CAPITAL LETTER O WITH GRAVE */
+    XK_Oacute:                      0x00d3, /* U+00D3 LATIN CAPITAL LETTER O WITH ACUTE */
+    XK_Ocircumflex:                 0x00d4, /* U+00D4 LATIN CAPITAL LETTER O WITH CIRCUMFLEX */
+    XK_Otilde:                      0x00d5, /* U+00D5 LATIN CAPITAL LETTER O WITH TILDE */
+    XK_Odiaeresis:                  0x00d6, /* U+00D6 LATIN CAPITAL LETTER O WITH DIAERESIS */
+    XK_multiply:                    0x00d7, /* U+00D7 MULTIPLICATION SIGN */
+    XK_Oslash:                      0x00d8, /* U+00D8 LATIN CAPITAL LETTER O WITH STROKE */
+    XK_Ooblique:                    0x00d8, /* U+00D8 LATIN CAPITAL LETTER O WITH STROKE */
+    XK_Ugrave:                      0x00d9, /* U+00D9 LATIN CAPITAL LETTER U WITH GRAVE */
+    XK_Uacute:                      0x00da, /* U+00DA LATIN CAPITAL LETTER U WITH ACUTE */
+    XK_Ucircumflex:                 0x00db, /* U+00DB LATIN CAPITAL LETTER U WITH CIRCUMFLEX */
+    XK_Udiaeresis:                  0x00dc, /* U+00DC LATIN CAPITAL LETTER U WITH DIAERESIS */
+    XK_Yacute:                      0x00dd, /* U+00DD LATIN CAPITAL LETTER Y WITH ACUTE */
+    XK_THORN:                       0x00de, /* U+00DE LATIN CAPITAL LETTER THORN */
+    XK_Thorn:                       0x00de, /* deprecated */
+    XK_ssharp:                      0x00df, /* U+00DF LATIN SMALL LETTER SHARP S */
+    XK_agrave:                      0x00e0, /* U+00E0 LATIN SMALL LETTER A WITH GRAVE */
+    XK_aacute:                      0x00e1, /* U+00E1 LATIN SMALL LETTER A WITH ACUTE */
+    XK_acircumflex:                 0x00e2, /* U+00E2 LATIN SMALL LETTER A WITH CIRCUMFLEX */
+    XK_atilde:                      0x00e3, /* U+00E3 LATIN SMALL LETTER A WITH TILDE */
+    XK_adiaeresis:                  0x00e4, /* U+00E4 LATIN SMALL LETTER A WITH DIAERESIS */
+    XK_aring:                       0x00e5, /* U+00E5 LATIN SMALL LETTER A WITH RING ABOVE */
+    XK_ae:                          0x00e6, /* U+00E6 LATIN SMALL LETTER AE */
+    XK_ccedilla:                    0x00e7, /* U+00E7 LATIN SMALL LETTER C WITH CEDILLA */
+    XK_egrave:                      0x00e8, /* U+00E8 LATIN SMALL LETTER E WITH GRAVE */
+    XK_eacute:                      0x00e9, /* U+00E9 LATIN SMALL LETTER E WITH ACUTE */
+    XK_ecircumflex:                 0x00ea, /* U+00EA LATIN SMALL LETTER E WITH CIRCUMFLEX */
+    XK_ediaeresis:                  0x00eb, /* U+00EB LATIN SMALL LETTER E WITH DIAERESIS */
+    XK_igrave:                      0x00ec, /* U+00EC LATIN SMALL LETTER I WITH GRAVE */
+    XK_iacute:                      0x00ed, /* U+00ED LATIN SMALL LETTER I WITH ACUTE */
+    XK_icircumflex:                 0x00ee, /* U+00EE LATIN SMALL LETTER I WITH CIRCUMFLEX */
+    XK_idiaeresis:                  0x00ef, /* U+00EF LATIN SMALL LETTER I WITH DIAERESIS */
+    XK_eth:                         0x00f0, /* U+00F0 LATIN SMALL LETTER ETH */
+    XK_ntilde:                      0x00f1, /* U+00F1 LATIN SMALL LETTER N WITH TILDE */
+    XK_ograve:                      0x00f2, /* U+00F2 LATIN SMALL LETTER O WITH GRAVE */
+    XK_oacute:                      0x00f3, /* U+00F3 LATIN SMALL LETTER O WITH ACUTE */
+    XK_ocircumflex:                 0x00f4, /* U+00F4 LATIN SMALL LETTER O WITH CIRCUMFLEX */
+    XK_otilde:                      0x00f5, /* U+00F5 LATIN SMALL LETTER O WITH TILDE */
+    XK_odiaeresis:                  0x00f6, /* U+00F6 LATIN SMALL LETTER O WITH DIAERESIS */
+    XK_division:                    0x00f7, /* U+00F7 DIVISION SIGN */
+    XK_oslash:                      0x00f8, /* U+00F8 LATIN SMALL LETTER O WITH STROKE */
+    XK_ooblique:                    0x00f8, /* U+00F8 LATIN SMALL LETTER O WITH STROKE */
+    XK_ugrave:                      0x00f9, /* U+00F9 LATIN SMALL LETTER U WITH GRAVE */
+    XK_uacute:                      0x00fa, /* U+00FA LATIN SMALL LETTER U WITH ACUTE */
+    XK_ucircumflex:                 0x00fb, /* U+00FB LATIN SMALL LETTER U WITH CIRCUMFLEX */
+    XK_udiaeresis:                  0x00fc, /* U+00FC LATIN SMALL LETTER U WITH DIAERESIS */
+    XK_yacute:                      0x00fd, /* U+00FD LATIN SMALL LETTER Y WITH ACUTE */
+    XK_thorn:                       0x00fe, /* U+00FE LATIN SMALL LETTER THORN */
+    XK_ydiaeresis:                  0x00ff, /* U+00FF LATIN SMALL LETTER Y WITH DIAERESIS */
+
+    /*
+     * Korean
+     * Byte 3 = 0x0e
+     */
+
+    XK_Hangul:                      0xff31, /* Hangul start/stop(toggle) */
+    XK_Hangul_Hanja:                0xff34, /* Start Hangul->Hanja Conversion */
+    XK_Hangul_Jeonja:               0xff38, /* Jeonja mode */
+
+    /*
+     * XFree86 vendor specific keysyms.
+     *
+     * The XFree86 keysym range is 0x10080001 - 0x1008FFFF.
+     */
+
+    XF86XK_ModeLock:                0x1008FF01,
+    XF86XK_MonBrightnessUp:         0x1008FF02,
+    XF86XK_MonBrightnessDown:       0x1008FF03,
+    XF86XK_KbdLightOnOff:           0x1008FF04,
+    XF86XK_KbdBrightnessUp:         0x1008FF05,
+    XF86XK_KbdBrightnessDown:       0x1008FF06,
+    XF86XK_Standby:                 0x1008FF10,
+    XF86XK_AudioLowerVolume:        0x1008FF11,
+    XF86XK_AudioMute:               0x1008FF12,
+    XF86XK_AudioRaiseVolume:        0x1008FF13,
+    XF86XK_AudioPlay:               0x1008FF14,
+    XF86XK_AudioStop:               0x1008FF15,
+    XF86XK_AudioPrev:               0x1008FF16,
+    XF86XK_AudioNext:               0x1008FF17,
+    XF86XK_HomePage:                0x1008FF18,
+    XF86XK_Mail:                    0x1008FF19,
+    XF86XK_Start:                   0x1008FF1A,
+    XF86XK_Search:                  0x1008FF1B,
+    XF86XK_AudioRecord:             0x1008FF1C,
+    XF86XK_Calculator:              0x1008FF1D,
+    XF86XK_Memo:                    0x1008FF1E,
+    XF86XK_ToDoList:                0x1008FF1F,
+    XF86XK_Calendar:                0x1008FF20,
+    XF86XK_PowerDown:               0x1008FF21,
+    XF86XK_ContrastAdjust:          0x1008FF22,
+    XF86XK_RockerUp:                0x1008FF23,
+    XF86XK_RockerDown:              0x1008FF24,
+    XF86XK_RockerEnter:             0x1008FF25,
+    XF86XK_Back:                    0x1008FF26,
+    XF86XK_Forward:                 0x1008FF27,
+    XF86XK_Stop:                    0x1008FF28,
+    XF86XK_Refresh:                 0x1008FF29,
+    XF86XK_PowerOff:                0x1008FF2A,
+    XF86XK_WakeUp:                  0x1008FF2B,
+    XF86XK_Eject:                   0x1008FF2C,
+    XF86XK_ScreenSaver:             0x1008FF2D,
+    XF86XK_WWW:                     0x1008FF2E,
+    XF86XK_Sleep:                   0x1008FF2F,
+    XF86XK_Favorites:               0x1008FF30,
+    XF86XK_AudioPause:              0x1008FF31,
+    XF86XK_AudioMedia:              0x1008FF32,
+    XF86XK_MyComputer:              0x1008FF33,
+    XF86XK_VendorHome:              0x1008FF34,
+    XF86XK_LightBulb:               0x1008FF35,
+    XF86XK_Shop:                    0x1008FF36,
+    XF86XK_History:                 0x1008FF37,
+    XF86XK_OpenURL:                 0x1008FF38,
+    XF86XK_AddFavorite:             0x1008FF39,
+    XF86XK_HotLinks:                0x1008FF3A,
+    XF86XK_BrightnessAdjust:        0x1008FF3B,
+    XF86XK_Finance:                 0x1008FF3C,
+    XF86XK_Community:               0x1008FF3D,
+    XF86XK_AudioRewind:             0x1008FF3E,
+    XF86XK_BackForward:             0x1008FF3F,
+    XF86XK_Launch0:                 0x1008FF40,
+    XF86XK_Launch1:                 0x1008FF41,
+    XF86XK_Launch2:                 0x1008FF42,
+    XF86XK_Launch3:                 0x1008FF43,
+    XF86XK_Launch4:                 0x1008FF44,
+    XF86XK_Launch5:                 0x1008FF45,
+    XF86XK_Launch6:                 0x1008FF46,
+    XF86XK_Launch7:                 0x1008FF47,
+    XF86XK_Launch8:                 0x1008FF48,
+    XF86XK_Launch9:                 0x1008FF49,
+    XF86XK_LaunchA:                 0x1008FF4A,
+    XF86XK_LaunchB:                 0x1008FF4B,
+    XF86XK_LaunchC:                 0x1008FF4C,
+    XF86XK_LaunchD:                 0x1008FF4D,
+    XF86XK_LaunchE:                 0x1008FF4E,
+    XF86XK_LaunchF:                 0x1008FF4F,
+    XF86XK_ApplicationLeft:         0x1008FF50,
+    XF86XK_ApplicationRight:        0x1008FF51,
+    XF86XK_Book:                    0x1008FF52,
+    XF86XK_CD:                      0x1008FF53,
+    XF86XK_Calculater:              0x1008FF54,
+    XF86XK_Clear:                   0x1008FF55,
+    XF86XK_Close:                   0x1008FF56,
+    XF86XK_Copy:                    0x1008FF57,
+    XF86XK_Cut:                     0x1008FF58,
+    XF86XK_Display:                 0x1008FF59,
+    XF86XK_DOS:                     0x1008FF5A,
+    XF86XK_Documents:               0x1008FF5B,
+    XF86XK_Excel:                   0x1008FF5C,
+    XF86XK_Explorer:                0x1008FF5D,
+    XF86XK_Game:                    0x1008FF5E,
+    XF86XK_Go:                      0x1008FF5F,
+    XF86XK_iTouch:                  0x1008FF60,
+    XF86XK_LogOff:                  0x1008FF61,
+    XF86XK_Market:                  0x1008FF62,
+    XF86XK_Meeting:                 0x1008FF63,
+    XF86XK_MenuKB:                  0x1008FF65,
+    XF86XK_MenuPB:                  0x1008FF66,
+    XF86XK_MySites:                 0x1008FF67,
+    XF86XK_New:                     0x1008FF68,
+    XF86XK_News:                    0x1008FF69,
+    XF86XK_OfficeHome:              0x1008FF6A,
+    XF86XK_Open:                    0x1008FF6B,
+    XF86XK_Option:                  0x1008FF6C,
+    XF86XK_Paste:                   0x1008FF6D,
+    XF86XK_Phone:                   0x1008FF6E,
+    XF86XK_Q:                       0x1008FF70,
+    XF86XK_Reply:                   0x1008FF72,
+    XF86XK_Reload:                  0x1008FF73,
+    XF86XK_RotateWindows:           0x1008FF74,
+    XF86XK_RotationPB:              0x1008FF75,
+    XF86XK_RotationKB:              0x1008FF76,
+    XF86XK_Save:                    0x1008FF77,
+    XF86XK_ScrollUp:                0x1008FF78,
+    XF86XK_ScrollDown:              0x1008FF79,
+    XF86XK_ScrollClick:             0x1008FF7A,
+    XF86XK_Send:                    0x1008FF7B,
+    XF86XK_Spell:                   0x1008FF7C,
+    XF86XK_SplitScreen:             0x1008FF7D,
+    XF86XK_Support:                 0x1008FF7E,
+    XF86XK_TaskPane:                0x1008FF7F,
+    XF86XK_Terminal:                0x1008FF80,
+    XF86XK_Tools:                   0x1008FF81,
+    XF86XK_Travel:                  0x1008FF82,
+    XF86XK_UserPB:                  0x1008FF84,
+    XF86XK_User1KB:                 0x1008FF85,
+    XF86XK_User2KB:                 0x1008FF86,
+    XF86XK_Video:                   0x1008FF87,
+    XF86XK_WheelButton:             0x1008FF88,
+    XF86XK_Word:                    0x1008FF89,
+    XF86XK_Xfer:                    0x1008FF8A,
+    XF86XK_ZoomIn:                  0x1008FF8B,
+    XF86XK_ZoomOut:                 0x1008FF8C,
+    XF86XK_Away:                    0x1008FF8D,
+    XF86XK_Messenger:               0x1008FF8E,
+    XF86XK_WebCam:                  0x1008FF8F,
+    XF86XK_MailForward:             0x1008FF90,
+    XF86XK_Pictures:                0x1008FF91,
+    XF86XK_Music:                   0x1008FF92,
+    XF86XK_Battery:                 0x1008FF93,
+    XF86XK_Bluetooth:               0x1008FF94,
+    XF86XK_WLAN:                    0x1008FF95,
+    XF86XK_UWB:                     0x1008FF96,
+    XF86XK_AudioForward:            0x1008FF97,
+    XF86XK_AudioRepeat:             0x1008FF98,
+    XF86XK_AudioRandomPlay:         0x1008FF99,
+    XF86XK_Subtitle:                0x1008FF9A,
+    XF86XK_AudioCycleTrack:         0x1008FF9B,
+    XF86XK_CycleAngle:              0x1008FF9C,
+    XF86XK_FrameBack:               0x1008FF9D,
+    XF86XK_FrameForward:            0x1008FF9E,
+    XF86XK_Time:                    0x1008FF9F,
+    XF86XK_Select:                  0x1008FFA0,
+    XF86XK_View:                    0x1008FFA1,
+    XF86XK_TopMenu:                 0x1008FFA2,
+    XF86XK_Red:                     0x1008FFA3,
+    XF86XK_Green:                   0x1008FFA4,
+    XF86XK_Yellow:                  0x1008FFA5,
+    XF86XK_Blue:                    0x1008FFA6,
+    XF86XK_Suspend:                 0x1008FFA7,
+    XF86XK_Hibernate:               0x1008FFA8,
+    XF86XK_TouchpadToggle:          0x1008FFA9,
+    XF86XK_TouchpadOn:              0x1008FFB0,
+    XF86XK_TouchpadOff:             0x1008FFB1,
+    XF86XK_AudioMicMute:            0x1008FFB2,
+    XF86XK_Switch_VT_1:             0x1008FE01,
+    XF86XK_Switch_VT_2:             0x1008FE02,
+    XF86XK_Switch_VT_3:             0x1008FE03,
+    XF86XK_Switch_VT_4:             0x1008FE04,
+    XF86XK_Switch_VT_5:             0x1008FE05,
+    XF86XK_Switch_VT_6:             0x1008FE06,
+    XF86XK_Switch_VT_7:             0x1008FE07,
+    XF86XK_Switch_VT_8:             0x1008FE08,
+    XF86XK_Switch_VT_9:             0x1008FE09,
+    XF86XK_Switch_VT_10:            0x1008FE0A,
+    XF86XK_Switch_VT_11:            0x1008FE0B,
+    XF86XK_Switch_VT_12:            0x1008FE0C,
+    XF86XK_Ungrab:                  0x1008FE20,
+    XF86XK_ClearGrab:               0x1008FE21,
+    XF86XK_Next_VMode:              0x1008FE22,
+    XF86XK_Prev_VMode:              0x1008FE23,
+    XF86XK_LogWindowTree:           0x1008FE24,
+    XF86XK_LogGrabInfo:             0x1008FE25,
+};

static/novnc/core/input/keysymdef.js

@@ -0,0 +1,688 @@
+/*
+ * Mapping from Unicode codepoints to X11/RFB keysyms
+ *
+ * This file was automatically generated from keysymdef.h
+ * DO NOT EDIT!
+ */
+
+/* Functions at the bottom */
+
+const codepoints = {
+    0x0100: 0x03c0, // XK_Amacron
+    0x0101: 0x03e0, // XK_amacron
+    0x0102: 0x01c3, // XK_Abreve
+    0x0103: 0x01e3, // XK_abreve
+    0x0104: 0x01a1, // XK_Aogonek
+    0x0105: 0x01b1, // XK_aogonek
+    0x0106: 0x01c6, // XK_Cacute
+    0x0107: 0x01e6, // XK_cacute
+    0x0108: 0x02c6, // XK_Ccircumflex
+    0x0109: 0x02e6, // XK_ccircumflex
+    0x010a: 0x02c5, // XK_Cabovedot
+    0x010b: 0x02e5, // XK_cabovedot
+    0x010c: 0x01c8, // XK_Ccaron
+    0x010d: 0x01e8, // XK_ccaron
+    0x010e: 0x01cf, // XK_Dcaron
+    0x010f: 0x01ef, // XK_dcaron
+    0x0110: 0x01d0, // XK_Dstroke
+    0x0111: 0x01f0, // XK_dstroke
+    0x0112: 0x03aa, // XK_Emacron
+    0x0113: 0x03ba, // XK_emacron
+    0x0116: 0x03cc, // XK_Eabovedot
+    0x0117: 0x03ec, // XK_eabovedot
+    0x0118: 0x01ca, // XK_Eogonek
+    0x0119: 0x01ea, // XK_eogonek
+    0x011a: 0x01cc, // XK_Ecaron
+    0x011b: 0x01ec, // XK_ecaron
+    0x011c: 0x02d8, // XK_Gcircumflex
+    0x011d: 0x02f8, // XK_gcircumflex
+    0x011e: 0x02ab, // XK_Gbreve
+    0x011f: 0x02bb, // XK_gbreve
+    0x0120: 0x02d5, // XK_Gabovedot
+    0x0121: 0x02f5, // XK_gabovedot
+    0x0122: 0x03ab, // XK_Gcedilla
+    0x0123: 0x03bb, // XK_gcedilla
+    0x0124: 0x02a6, // XK_Hcircumflex
+    0x0125: 0x02b6, // XK_hcircumflex
+    0x0126: 0x02a1, // XK_Hstroke
+    0x0127: 0x02b1, // XK_hstroke
+    0x0128: 0x03a5, // XK_Itilde
+    0x0129: 0x03b5, // XK_itilde
+    0x012a: 0x03cf, // XK_Imacron
+    0x012b: 0x03ef, // XK_imacron
+    0x012e: 0x03c7, // XK_Iogonek
+    0x012f: 0x03e7, // XK_iogonek
+    0x0130: 0x02a9, // XK_Iabovedot
+    0x0131: 0x02b9, // XK_idotless
+    0x0134: 0x02ac, // XK_Jcircumflex
+    0x0135: 0x02bc, // XK_jcircumflex
+    0x0136: 0x03d3, // XK_Kcedilla
+    0x0137: 0x03f3, // XK_kcedilla
+    0x0138: 0x03a2, // XK_kra
+    0x0139: 0x01c5, // XK_Lacute
+    0x013a: 0x01e5, // XK_lacute
+    0x013b: 0x03a6, // XK_Lcedilla
+    0x013c: 0x03b6, // XK_lcedilla
+    0x013d: 0x01a5, // XK_Lcaron
+    0x013e: 0x01b5, // XK_lcaron
+    0x0141: 0x01a3, // XK_Lstroke
+    0x0142: 0x01b3, // XK_lstroke
+    0x0143: 0x01d1, // XK_Nacute
+    0x0144: 0x01f1, // XK_nacute
+    0x0145: 0x03d1, // XK_Ncedilla
+    0x0146: 0x03f1, // XK_ncedilla
+    0x0147: 0x01d2, // XK_Ncaron
+    0x0148: 0x01f2, // XK_ncaron
+    0x014a: 0x03bd, // XK_ENG
+    0x014b: 0x03bf, // XK_eng
+    0x014c: 0x03d2, // XK_Omacron
+    0x014d: 0x03f2, // XK_omacron
+    0x0150: 0x01d5, // XK_Odoubleacute
+    0x0151: 0x01f5, // XK_odoubleacute
+    0x0152: 0x13bc, // XK_OE
+    0x0153: 0x13bd, // XK_oe
+    0x0154: 0x01c0, // XK_Racute
+    0x0155: 0x01e0, // XK_racute
+    0x0156: 0x03a3, // XK_Rcedilla
+    0x0157: 0x03b3, // XK_rcedilla
+    0x0158: 0x01d8, // XK_Rcaron
+    0x0159: 0x01f8, // XK_rcaron
+    0x015a: 0x01a6, // XK_Sacute
+    0x015b: 0x01b6, // XK_sacute
+    0x015c: 0x02de, // XK_Scircumflex
+    0x015d: 0x02fe, // XK_scircumflex
+    0x015e: 0x01aa, // XK_Scedilla
+    0x015f: 0x01ba, // XK_scedilla
+    0x0160: 0x01a9, // XK_Scaron
+    0x0161: 0x01b9, // XK_scaron
+    0x0162: 0x01de, // XK_Tcedilla
+    0x0163: 0x01fe, // XK_tcedilla
+    0x0164: 0x01ab, // XK_Tcaron
+    0x0165: 0x01bb, // XK_tcaron
+    0x0166: 0x03ac, // XK_Tslash
+    0x0167: 0x03bc, // XK_tslash
+    0x0168: 0x03dd, // XK_Utilde
+    0x0169: 0x03fd, // XK_utilde
+    0x016a: 0x03de, // XK_Umacron
+    0x016b: 0x03fe, // XK_umacron
+    0x016c: 0x02dd, // XK_Ubreve
+    0x016d: 0x02fd, // XK_ubreve
+    0x016e: 0x01d9, // XK_Uring
+    0x016f: 0x01f9, // XK_uring
+    0x0170: 0x01db, // XK_Udoubleacute
+    0x0171: 0x01fb, // XK_udoubleacute
+    0x0172: 0x03d9, // XK_Uogonek
+    0x0173: 0x03f9, // XK_uogonek
+    0x0178: 0x13be, // XK_Ydiaeresis
+    0x0179: 0x01ac, // XK_Zacute
+    0x017a: 0x01bc, // XK_zacute
+    0x017b: 0x01af, // XK_Zabovedot
+    0x017c: 0x01bf, // XK_zabovedot
+    0x017d: 0x01ae, // XK_Zcaron
+    0x017e: 0x01be, // XK_zcaron
+    0x0192: 0x08f6, // XK_function
+    0x01d2: 0x10001d1, // XK_Ocaron
+    0x02c7: 0x01b7, // XK_caron
+    0x02d8: 0x01a2, // XK_breve
+    0x02d9: 0x01ff, // XK_abovedot
+    0x02db: 0x01b2, // XK_ogonek
+    0x02dd: 0x01bd, // XK_doubleacute
+    0x0385: 0x07ae, // XK_Greek_accentdieresis
+    0x0386: 0x07a1, // XK_Greek_ALPHAaccent
+    0x0388: 0x07a2, // XK_Greek_EPSILONaccent
+    0x0389: 0x07a3, // XK_Greek_ETAaccent
+    0x038a: 0x07a4, // XK_Greek_IOTAaccent
+    0x038c: 0x07a7, // XK_Greek_OMICRONaccent
+    0x038e: 0x07a8, // XK_Greek_UPSILONaccent
+    0x038f: 0x07ab, // XK_Greek_OMEGAaccent
+    0x0390: 0x07b6, // XK_Greek_iotaaccentdieresis
+    0x0391: 0x07c1, // XK_Greek_ALPHA
+    0x0392: 0x07c2, // XK_Greek_BETA
+    0x0393: 0x07c3, // XK_Greek_GAMMA
+    0x0394: 0x07c4, // XK_Greek_DELTA
+    0x0395: 0x07c5, // XK_Greek_EPSILON
+    0x0396: 0x07c6, // XK_Greek_ZETA
+    0x0397: 0x07c7, // XK_Greek_ETA
+    0x0398: 0x07c8, // XK_Greek_THETA
+    0x0399: 0x07c9, // XK_Greek_IOTA
+    0x039a: 0x07ca, // XK_Greek_KAPPA
+    0x039b: 0x07cb, // XK_Greek_LAMDA
+    0x039c: 0x07cc, // XK_Greek_MU
+    0x039d: 0x07cd, // XK_Greek_NU
+    0x039e: 0x07ce, // XK_Greek_XI
+    0x039f: 0x07cf, // XK_Greek_OMICRON
+    0x03a0: 0x07d0, // XK_Greek_PI
+    0x03a1: 0x07d1, // XK_Greek_RHO
+    0x03a3: 0x07d2, // XK_Greek_SIGMA
+    0x03a4: 0x07d4, // XK_Greek_TAU
+    0x03a5: 0x07d5, // XK_Greek_UPSILON
+    0x03a6: 0x07d6, // XK_Greek_PHI
+    0x03a7: 0x07d7, // XK_Greek_CHI
+    0x03a8: 0x07d8, // XK_Greek_PSI
+    0x03a9: 0x07d9, // XK_Greek_OMEGA
+    0x03aa: 0x07a5, // XK_Greek_IOTAdieresis
+    0x03ab: 0x07a9, // XK_Greek_UPSILONdieresis
+    0x03ac: 0x07b1, // XK_Greek_alphaaccent
+    0x03ad: 0x07b2, // XK_Greek_epsilonaccent
+    0x03ae: 0x07b3, // XK_Greek_etaaccent
+    0x03af: 0x07b4, // XK_Greek_iotaaccent
+    0x03b0: 0x07ba, // XK_Greek_upsilonaccentdieresis
+    0x03b1: 0x07e1, // XK_Greek_alpha
+    0x03b2: 0x07e2, // XK_Greek_beta
+    0x03b3: 0x07e3, // XK_Greek_gamma
+    0x03b4: 0x07e4, // XK_Greek_delta
+    0x03b5: 0x07e5, // XK_Greek_epsilon
+    0x03b6: 0x07e6, // XK_Greek_zeta
+    0x03b7: 0x07e7, // XK_Greek_eta
+    0x03b8: 0x07e8, // XK_Greek_theta
+    0x03b9: 0x07e9, // XK_Greek_iota
+    0x03ba: 0x07ea, // XK_Greek_kappa
+    0x03bb: 0x07eb, // XK_Greek_lamda
+    0x03bc: 0x07ec, // XK_Greek_mu
+    0x03bd: 0x07ed, // XK_Greek_nu
+    0x03be: 0x07ee, // XK_Greek_xi
+    0x03bf: 0x07ef, // XK_Greek_omicron
+    0x03c0: 0x07f0, // XK_Greek_pi
+    0x03c1: 0x07f1, // XK_Greek_rho
+    0x03c2: 0x07f3, // XK_Greek_finalsmallsigma
+    0x03c3: 0x07f2, // XK_Greek_sigma
+    0x03c4: 0x07f4, // XK_Greek_tau
+    0x03c5: 0x07f5, // XK_Greek_upsilon
+    0x03c6: 0x07f6, // XK_Greek_phi
+    0x03c7: 0x07f7, // XK_Greek_chi
+    0x03c8: 0x07f8, // XK_Greek_psi
+    0x03c9: 0x07f9, // XK_Greek_omega
+    0x03ca: 0x07b5, // XK_Greek_iotadieresis
+    0x03cb: 0x07b9, // XK_Greek_upsilondieresis
+    0x03cc: 0x07b7, // XK_Greek_omicronaccent
+    0x03cd: 0x07b8, // XK_Greek_upsilonaccent
+    0x03ce: 0x07bb, // XK_Greek_omegaaccent
+    0x0401: 0x06b3, // XK_Cyrillic_IO
+    0x0402: 0x06b1, // XK_Serbian_DJE
+    0x0403: 0x06b2, // XK_Macedonia_GJE
+    0x0404: 0x06b4, // XK_Ukrainian_IE
+    0x0405: 0x06b5, // XK_Macedonia_DSE
+    0x0406: 0x06b6, // XK_Ukrainian_I
+    0x0407: 0x06b7, // XK_Ukrainian_YI
+    0x0408: 0x06b8, // XK_Cyrillic_JE
+    0x0409: 0x06b9, // XK_Cyrillic_LJE
+    0x040a: 0x06ba, // XK_Cyrillic_NJE
+    0x040b: 0x06bb, // XK_Serbian_TSHE
+    0x040c: 0x06bc, // XK_Macedonia_KJE
+    0x040e: 0x06be, // XK_Byelorussian_SHORTU
+    0x040f: 0x06bf, // XK_Cyrillic_DZHE
+    0x0410: 0x06e1, // XK_Cyrillic_A
+    0x0411: 0x06e2, // XK_Cyrillic_BE
+    0x0412: 0x06f7, // XK_Cyrillic_VE
+    0x0413: 0x06e7, // XK_Cyrillic_GHE
+    0x0414: 0x06e4, // XK_Cyrillic_DE
+    0x0415: 0x06e5, // XK_Cyrillic_IE
+    0x0416: 0x06f6, // XK_Cyrillic_ZHE
+    0x0417: 0x06fa, // XK_Cyrillic_ZE
+    0x0418: 0x06e9, // XK_Cyrillic_I
+    0x0419: 0x06ea, // XK_Cyrillic_SHORTI
+    0x041a: 0x06eb, // XK_Cyrillic_KA
+    0x041b: 0x06ec, // XK_Cyrillic_EL
+    0x041c: 0x06ed, // XK_Cyrillic_EM
+    0x041d: 0x06ee, // XK_Cyrillic_EN
+    0x041e: 0x06ef, // XK_Cyrillic_O
+    0x041f: 0x06f0, // XK_Cyrillic_PE
+    0x0420: 0x06f2, // XK_Cyrillic_ER
+    0x0421: 0x06f3, // XK_Cyrillic_ES
+    0x0422: 0x06f4, // XK_Cyrillic_TE
+    0x0423: 0x06f5, // XK_Cyrillic_U
+    0x0424: 0x06e6, // XK_Cyrillic_EF
+    0x0425: 0x06e8, // XK_Cyrillic_HA
+    0x0426: 0x06e3, // XK_Cyrillic_TSE
+    0x0427: 0x06fe, // XK_Cyrillic_CHE
+    0x0428: 0x06fb, // XK_Cyrillic_SHA
+    0x0429: 0x06fd, // XK_Cyrillic_SHCHA
+    0x042a: 0x06ff, // XK_Cyrillic_HARDSIGN
+    0x042b: 0x06f9, // XK_Cyrillic_YERU
+    0x042c: 0x06f8, // XK_Cyrillic_SOFTSIGN
+    0x042d: 0x06fc, // XK_Cyrillic_E
+    0x042e: 0x06e0, // XK_Cyrillic_YU
+    0x042f: 0x06f1, // XK_Cyrillic_YA
+    0x0430: 0x06c1, // XK_Cyrillic_a
+    0x0431: 0x06c2, // XK_Cyrillic_be
+    0x0432: 0x06d7, // XK_Cyrillic_ve
+    0x0433: 0x06c7, // XK_Cyrillic_ghe
+    0x0434: 0x06c4, // XK_Cyrillic_de
+    0x0435: 0x06c5, // XK_Cyrillic_ie
+    0x0436: 0x06d6, // XK_Cyrillic_zhe
+    0x0437: 0x06da, // XK_Cyrillic_ze
+    0x0438: 0x06c9, // XK_Cyrillic_i
+    0x0439: 0x06ca, // XK_Cyrillic_shorti
+    0x043a: 0x06cb, // XK_Cyrillic_ka
+    0x043b: 0x06cc, // XK_Cyrillic_el
+    0x043c: 0x06cd, // XK_Cyrillic_em
+    0x043d: 0x06ce, // XK_Cyrillic_en
+    0x043e: 0x06cf, // XK_Cyrillic_o
+    0x043f: 0x06d0, // XK_Cyrillic_pe
+    0x0440: 0x06d2, // XK_Cyrillic_er
+    0x0441: 0x06d3, // XK_Cyrillic_es
+    0x0442: 0x06d4, // XK_Cyrillic_te
+    0x0443: 0x06d5, // XK_Cyrillic_u
+    0x0444: 0x06c6, // XK_Cyrillic_ef
+    0x0445: 0x06c8, // XK_Cyrillic_ha
+    0x0446: 0x06c3, // XK_Cyrillic_tse
+    0x0447: 0x06de, // XK_Cyrillic_che
+    0x0448: 0x06db, // XK_Cyrillic_sha
+    0x0449: 0x06dd, // XK_Cyrillic_shcha
+    0x044a: 0x06df, // XK_Cyrillic_hardsign
+    0x044b: 0x06d9, // XK_Cyrillic_yeru
+    0x044c: 0x06d8, // XK_Cyrillic_softsign
+    0x044d: 0x06dc, // XK_Cyrillic_e
+    0x044e: 0x06c0, // XK_Cyrillic_yu
+    0x044f: 0x06d1, // XK_Cyrillic_ya
+    0x0451: 0x06a3, // XK_Cyrillic_io
+    0x0452: 0x06a1, // XK_Serbian_dje
+    0x0453: 0x06a2, // XK_Macedonia_gje
+    0x0454: 0x06a4, // XK_Ukrainian_ie
+    0x0455: 0x06a5, // XK_Macedonia_dse
+    0x0456: 0x06a6, // XK_Ukrainian_i
+    0x0457: 0x06a7, // XK_Ukrainian_yi
+    0x0458: 0x06a8, // XK_Cyrillic_je
+    0x0459: 0x06a9, // XK_Cyrillic_lje
+    0x045a: 0x06aa, // XK_Cyrillic_nje
+    0x045b: 0x06ab, // XK_Serbian_tshe
+    0x045c: 0x06ac, // XK_Macedonia_kje
+    0x045e: 0x06ae, // XK_Byelorussian_shortu
+    0x045f: 0x06af, // XK_Cyrillic_dzhe
+    0x0490: 0x06bd, // XK_Ukrainian_GHE_WITH_UPTURN
+    0x0491: 0x06ad, // XK_Ukrainian_ghe_with_upturn
+    0x05d0: 0x0ce0, // XK_hebrew_aleph
+    0x05d1: 0x0ce1, // XK_hebrew_bet
+    0x05d2: 0x0ce2, // XK_hebrew_gimel
+    0x05d3: 0x0ce3, // XK_hebrew_dalet
+    0x05d4: 0x0ce4, // XK_hebrew_he
+    0x05d5: 0x0ce5, // XK_hebrew_waw
+    0x05d6: 0x0ce6, // XK_hebrew_zain
+    0x05d7: 0x0ce7, // XK_hebrew_chet
+    0x05d8: 0x0ce8, // XK_hebrew_tet
+    0x05d9: 0x0ce9, // XK_hebrew_yod
+    0x05da: 0x0cea, // XK_hebrew_finalkaph
+    0x05db: 0x0ceb, // XK_hebrew_kaph
+    0x05dc: 0x0cec, // XK_hebrew_lamed
+    0x05dd: 0x0ced, // XK_hebrew_finalmem
+    0x05de: 0x0cee, // XK_hebrew_mem
+    0x05df: 0x0cef, // XK_hebrew_finalnun
+    0x05e0: 0x0cf0, // XK_hebrew_nun
+    0x05e1: 0x0cf1, // XK_hebrew_samech
+    0x05e2: 0x0cf2, // XK_hebrew_ayin
+    0x05e3: 0x0cf3, // XK_hebrew_finalpe
+    0x05e4: 0x0cf4, // XK_hebrew_pe
+    0x05e5: 0x0cf5, // XK_hebrew_finalzade
+    0x05e6: 0x0cf6, // XK_hebrew_zade
+    0x05e7: 0x0cf7, // XK_hebrew_qoph
+    0x05e8: 0x0cf8, // XK_hebrew_resh
+    0x05e9: 0x0cf9, // XK_hebrew_shin
+    0x05ea: 0x0cfa, // XK_hebrew_taw
+    0x060c: 0x05ac, // XK_Arabic_comma
+    0x061b: 0x05bb, // XK_Arabic_semicolon
+    0x061f: 0x05bf, // XK_Arabic_question_mark
+    0x0621: 0x05c1, // XK_Arabic_hamza
+    0x0622: 0x05c2, // XK_Arabic_maddaonalef
+    0x0623: 0x05c3, // XK_Arabic_hamzaonalef
+    0x0624: 0x05c4, // XK_Arabic_hamzaonwaw
+    0x0625: 0x05c5, // XK_Arabic_hamzaunderalef
+    0x0626: 0x05c6, // XK_Arabic_hamzaonyeh
+    0x0627: 0x05c7, // XK_Arabic_alef
+    0x0628: 0x05c8, // XK_Arabic_beh
+    0x0629: 0x05c9, // XK_Arabic_tehmarbuta
+    0x062a: 0x05ca, // XK_Arabic_teh
+    0x062b: 0x05cb, // XK_Arabic_theh
+    0x062c: 0x05cc, // XK_Arabic_jeem
+    0x062d: 0x05cd, // XK_Arabic_hah
+    0x062e: 0x05ce, // XK_Arabic_khah
+    0x062f: 0x05cf, // XK_Arabic_dal
+    0x0630: 0x05d0, // XK_Arabic_thal
+    0x0631: 0x05d1, // XK_Arabic_ra
+    0x0632: 0x05d2, // XK_Arabic_zain
+    0x0633: 0x05d3, // XK_Arabic_seen
+    0x0634: 0x05d4, // XK_Arabic_sheen
+    0x0635: 0x05d5, // XK_Arabic_sad
+    0x0636: 0x05d6, // XK_Arabic_dad
+    0x0637: 0x05d7, // XK_Arabic_tah
+    0x0638: 0x05d8, // XK_Arabic_zah
+    0x0639: 0x05d9, // XK_Arabic_ain
+    0x063a: 0x05da, // XK_Arabic_ghain
+    0x0640: 0x05e0, // XK_Arabic_tatweel
+    0x0641: 0x05e1, // XK_Arabic_feh
+    0x0642: 0x05e2, // XK_Arabic_qaf
+    0x0643: 0x05e3, // XK_Arabic_kaf
+    0x0644: 0x05e4, // XK_Arabic_lam
+    0x0645: 0x05e5, // XK_Arabic_meem
+    0x0646: 0x05e6, // XK_Arabic_noon
+    0x0647: 0x05e7, // XK_Arabic_ha
+    0x0648: 0x05e8, // XK_Arabic_waw
+    0x0649: 0x05e9, // XK_Arabic_alefmaksura
+    0x064a: 0x05ea, // XK_Arabic_yeh
+    0x064b: 0x05eb, // XK_Arabic_fathatan
+    0x064c: 0x05ec, // XK_Arabic_dammatan
+    0x064d: 0x05ed, // XK_Arabic_kasratan
+    0x064e: 0x05ee, // XK_Arabic_fatha
+    0x064f: 0x05ef, // XK_Arabic_damma
+    0x0650: 0x05f0, // XK_Arabic_kasra
+    0x0651: 0x05f1, // XK_Arabic_shadda
+    0x0652: 0x05f2, // XK_Arabic_sukun
+    0x0e01: 0x0da1, // XK_Thai_kokai
+    0x0e02: 0x0da2, // XK_Thai_khokhai
+    0x0e03: 0x0da3, // XK_Thai_khokhuat
+    0x0e04: 0x0da4, // XK_Thai_khokhwai
+    0x0e05: 0x0da5, // XK_Thai_khokhon
+    0x0e06: 0x0da6, // XK_Thai_khorakhang
+    0x0e07: 0x0da7, // XK_Thai_ngongu
+    0x0e08: 0x0da8, // XK_Thai_chochan
+    0x0e09: 0x0da9, // XK_Thai_choching
+    0x0e0a: 0x0daa, // XK_Thai_chochang
+    0x0e0b: 0x0dab, // XK_Thai_soso
+    0x0e0c: 0x0dac, // XK_Thai_chochoe
+    0x0e0d: 0x0dad, // XK_Thai_yoying
+    0x0e0e: 0x0dae, // XK_Thai_dochada
+    0x0e0f: 0x0daf, // XK_Thai_topatak
+    0x0e10: 0x0db0, // XK_Thai_thothan
+    0x0e11: 0x0db1, // XK_Thai_thonangmontho
+    0x0e12: 0x0db2, // XK_Thai_thophuthao
+    0x0e13: 0x0db3, // XK_Thai_nonen
+    0x0e14: 0x0db4, // XK_Thai_dodek
+    0x0e15: 0x0db5, // XK_Thai_totao
+    0x0e16: 0x0db6, // XK_Thai_thothung
+    0x0e17: 0x0db7, // XK_Thai_thothahan
+    0x0e18: 0x0db8, // XK_Thai_thothong
+    0x0e19: 0x0db9, // XK_Thai_nonu
+    0x0e1a: 0x0dba, // XK_Thai_bobaimai
+    0x0e1b: 0x0dbb, // XK_Thai_popla
+    0x0e1c: 0x0dbc, // XK_Thai_phophung
+    0x0e1d: 0x0dbd, // XK_Thai_fofa
+    0x0e1e: 0x0dbe, // XK_Thai_phophan
+    0x0e1f: 0x0dbf, // XK_Thai_fofan
+    0x0e20: 0x0dc0, // XK_Thai_phosamphao
+    0x0e21: 0x0dc1, // XK_Thai_moma
+    0x0e22: 0x0dc2, // XK_Thai_yoyak
+    0x0e23: 0x0dc3, // XK_Thai_rorua
+    0x0e24: 0x0dc4, // XK_Thai_ru
+    0x0e25: 0x0dc5, // XK_Thai_loling
+    0x0e26: 0x0dc6, // XK_Thai_lu
+    0x0e27: 0x0dc7, // XK_Thai_wowaen
+    0x0e28: 0x0dc8, // XK_Thai_sosala
+    0x0e29: 0x0dc9, // XK_Thai_sorusi
+    0x0e2a: 0x0dca, // XK_Thai_sosua
+    0x0e2b: 0x0dcb, // XK_Thai_hohip
+    0x0e2c: 0x0dcc, // XK_Thai_lochula
+    0x0e2d: 0x0dcd, // XK_Thai_oang
+    0x0e2e: 0x0dce, // XK_Thai_honokhuk
+    0x0e2f: 0x0dcf, // XK_Thai_paiyannoi
+    0x0e30: 0x0dd0, // XK_Thai_saraa
+    0x0e31: 0x0dd1, // XK_Thai_maihanakat
+    0x0e32: 0x0dd2, // XK_Thai_saraaa
+    0x0e33: 0x0dd3, // XK_Thai_saraam
+    0x0e34: 0x0dd4, // XK_Thai_sarai
+    0x0e35: 0x0dd5, // XK_Thai_saraii
+    0x0e36: 0x0dd6, // XK_Thai_saraue
+    0x0e37: 0x0dd7, // XK_Thai_sarauee
+    0x0e38: 0x0dd8, // XK_Thai_sarau
+    0x0e39: 0x0dd9, // XK_Thai_sarauu
+    0x0e3a: 0x0dda, // XK_Thai_phinthu
+    0x0e3f: 0x0ddf, // XK_Thai_baht
+    0x0e40: 0x0de0, // XK_Thai_sarae
+    0x0e41: 0x0de1, // XK_Thai_saraae
+    0x0e42: 0x0de2, // XK_Thai_sarao
+    0x0e43: 0x0de3, // XK_Thai_saraaimaimuan
+    0x0e44: 0x0de4, // XK_Thai_saraaimaimalai
+    0x0e45: 0x0de5, // XK_Thai_lakkhangyao
+    0x0e46: 0x0de6, // XK_Thai_maiyamok
+    0x0e47: 0x0de7, // XK_Thai_maitaikhu
+    0x0e48: 0x0de8, // XK_Thai_maiek
+    0x0e49: 0x0de9, // XK_Thai_maitho
+    0x0e4a: 0x0dea, // XK_Thai_maitri
+    0x0e4b: 0x0deb, // XK_Thai_maichattawa
+    0x0e4c: 0x0dec, // XK_Thai_thanthakhat
+    0x0e4d: 0x0ded, // XK_Thai_nikhahit
+    0x0e50: 0x0df0, // XK_Thai_leksun
+    0x0e51: 0x0df1, // XK_Thai_leknung
+    0x0e52: 0x0df2, // XK_Thai_leksong
+    0x0e53: 0x0df3, // XK_Thai_leksam
+    0x0e54: 0x0df4, // XK_Thai_leksi
+    0x0e55: 0x0df5, // XK_Thai_lekha
+    0x0e56: 0x0df6, // XK_Thai_lekhok
+    0x0e57: 0x0df7, // XK_Thai_lekchet
+    0x0e58: 0x0df8, // XK_Thai_lekpaet
+    0x0e59: 0x0df9, // XK_Thai_lekkao
+    0x2002: 0x0aa2, // XK_enspace
+    0x2003: 0x0aa1, // XK_emspace
+    0x2004: 0x0aa3, // XK_em3space
+    0x2005: 0x0aa4, // XK_em4space
+    0x2007: 0x0aa5, // XK_digitspace
+    0x2008: 0x0aa6, // XK_punctspace
+    0x2009: 0x0aa7, // XK_thinspace
+    0x200a: 0x0aa8, // XK_hairspace
+    0x2012: 0x0abb, // XK_figdash
+    0x2013: 0x0aaa, // XK_endash
+    0x2014: 0x0aa9, // XK_emdash
+    0x2015: 0x07af, // XK_Greek_horizbar
+    0x2017: 0x0cdf, // XK_hebrew_doublelowline
+    0x2018: 0x0ad0, // XK_leftsinglequotemark
+    0x2019: 0x0ad1, // XK_rightsinglequotemark
+    0x201a: 0x0afd, // XK_singlelowquotemark
+    0x201c: 0x0ad2, // XK_leftdoublequotemark
+    0x201d: 0x0ad3, // XK_rightdoublequotemark
+    0x201e: 0x0afe, // XK_doublelowquotemark
+    0x2020: 0x0af1, // XK_dagger
+    0x2021: 0x0af2, // XK_doubledagger
+    0x2022: 0x0ae6, // XK_enfilledcircbullet
+    0x2025: 0x0aaf, // XK_doubbaselinedot
+    0x2026: 0x0aae, // XK_ellipsis
+    0x2030: 0x0ad5, // XK_permille
+    0x2032: 0x0ad6, // XK_minutes
+    0x2033: 0x0ad7, // XK_seconds
+    0x2038: 0x0afc, // XK_caret
+    0x203e: 0x047e, // XK_overline
+    0x20a9: 0x0eff, // XK_Korean_Won
+    0x20ac: 0x20ac, // XK_EuroSign
+    0x2105: 0x0ab8, // XK_careof
+    0x2116: 0x06b0, // XK_numerosign
+    0x2117: 0x0afb, // XK_phonographcopyright
+    0x211e: 0x0ad4, // XK_prescription
+    0x2122: 0x0ac9, // XK_trademark
+    0x2153: 0x0ab0, // XK_onethird
+    0x2154: 0x0ab1, // XK_twothirds
+    0x2155: 0x0ab2, // XK_onefifth
+    0x2156: 0x0ab3, // XK_twofifths
+    0x2157: 0x0ab4, // XK_threefifths
+    0x2158: 0x0ab5, // XK_fourfifths
+    0x2159: 0x0ab6, // XK_onesixth
+    0x215a: 0x0ab7, // XK_fivesixths
+    0x215b: 0x0ac3, // XK_oneeighth
+    0x215c: 0x0ac4, // XK_threeeighths
+    0x215d: 0x0ac5, // XK_fiveeighths
+    0x215e: 0x0ac6, // XK_seveneighths
+    0x2190: 0x08fb, // XK_leftarrow
+    0x2191: 0x08fc, // XK_uparrow
+    0x2192: 0x08fd, // XK_rightarrow
+    0x2193: 0x08fe, // XK_downarrow
+    0x21d2: 0x08ce, // XK_implies
+    0x21d4: 0x08cd, // XK_ifonlyif
+    0x2202: 0x08ef, // XK_partialderivative
+    0x2207: 0x08c5, // XK_nabla
+    0x2218: 0x0bca, // XK_jot
+    0x221a: 0x08d6, // XK_radical
+    0x221d: 0x08c1, // XK_variation
+    0x221e: 0x08c2, // XK_infinity
+    0x2227: 0x08de, // XK_logicaland
+    0x2228: 0x08df, // XK_logicalor
+    0x2229: 0x08dc, // XK_intersection
+    0x222a: 0x08dd, // XK_union
+    0x222b: 0x08bf, // XK_integral
+    0x2234: 0x08c0, // XK_therefore
+    0x223c: 0x08c8, // XK_approximate
+    0x2243: 0x08c9, // XK_similarequal
+    0x2245: 0x1002248, // XK_approxeq
+    0x2260: 0x08bd, // XK_notequal
+    0x2261: 0x08cf, // XK_identical
+    0x2264: 0x08bc, // XK_lessthanequal
+    0x2265: 0x08be, // XK_greaterthanequal
+    0x2282: 0x08da, // XK_includedin
+    0x2283: 0x08db, // XK_includes
+    0x22a2: 0x0bfc, // XK_righttack
+    0x22a3: 0x0bdc, // XK_lefttack
+    0x22a4: 0x0bc2, // XK_downtack
+    0x22a5: 0x0bce, // XK_uptack
+    0x2308: 0x0bd3, // XK_upstile
+    0x230a: 0x0bc4, // XK_downstile
+    0x2315: 0x0afa, // XK_telephonerecorder
+    0x2320: 0x08a4, // XK_topintegral
+    0x2321: 0x08a5, // XK_botintegral
+    0x2395: 0x0bcc, // XK_quad
+    0x239b: 0x08ab, // XK_topleftparens
+    0x239d: 0x08ac, // XK_botleftparens
+    0x239e: 0x08ad, // XK_toprightparens
+    0x23a0: 0x08ae, // XK_botrightparens
+    0x23a1: 0x08a7, // XK_topleftsqbracket
+    0x23a3: 0x08a8, // XK_botleftsqbracket
+    0x23a4: 0x08a9, // XK_toprightsqbracket
+    0x23a6: 0x08aa, // XK_botrightsqbracket
+    0x23a8: 0x08af, // XK_leftmiddlecurlybrace
+    0x23ac: 0x08b0, // XK_rightmiddlecurlybrace
+    0x23b7: 0x08a1, // XK_leftradical
+    0x23ba: 0x09ef, // XK_horizlinescan1
+    0x23bb: 0x09f0, // XK_horizlinescan3
+    0x23bc: 0x09f2, // XK_horizlinescan7
+    0x23bd: 0x09f3, // XK_horizlinescan9
+    0x2409: 0x09e2, // XK_ht
+    0x240a: 0x09e5, // XK_lf
+    0x240b: 0x09e9, // XK_vt
+    0x240c: 0x09e3, // XK_ff
+    0x240d: 0x09e4, // XK_cr
+    0x2423: 0x0aac, // XK_signifblank
+    0x2424: 0x09e8, // XK_nl
+    0x2500: 0x08a3, // XK_horizconnector
+    0x2502: 0x08a6, // XK_vertconnector
+    0x250c: 0x08a2, // XK_topleftradical
+    0x2510: 0x09eb, // XK_uprightcorner
+    0x2514: 0x09ed, // XK_lowleftcorner
+    0x2518: 0x09ea, // XK_lowrightcorner
+    0x251c: 0x09f4, // XK_leftt
+    0x2524: 0x09f5, // XK_rightt
+    0x252c: 0x09f7, // XK_topt
+    0x2534: 0x09f6, // XK_bott
+    0x253c: 0x09ee, // XK_crossinglines
+    0x2592: 0x09e1, // XK_checkerboard
+    0x25aa: 0x0ae7, // XK_enfilledsqbullet
+    0x25ab: 0x0ae1, // XK_enopensquarebullet
+    0x25ac: 0x0adb, // XK_filledrectbullet
+    0x25ad: 0x0ae2, // XK_openrectbullet
+    0x25ae: 0x0adf, // XK_emfilledrect
+    0x25af: 0x0acf, // XK_emopenrectangle
+    0x25b2: 0x0ae8, // XK_filledtribulletup
+    0x25b3: 0x0ae3, // XK_opentribulletup
+    0x25b6: 0x0add, // XK_filledrighttribullet
+    0x25b7: 0x0acd, // XK_rightopentriangle
+    0x25bc: 0x0ae9, // XK_filledtribulletdown
+    0x25bd: 0x0ae4, // XK_opentribulletdown
+    0x25c0: 0x0adc, // XK_filledlefttribullet
+    0x25c1: 0x0acc, // XK_leftopentriangle
+    0x25c6: 0x09e0, // XK_soliddiamond
+    0x25cb: 0x0ace, // XK_emopencircle
+    0x25cf: 0x0ade, // XK_emfilledcircle
+    0x25e6: 0x0ae0, // XK_enopencircbullet
+    0x2606: 0x0ae5, // XK_openstar
+    0x260e: 0x0af9, // XK_telephone
+    0x2613: 0x0aca, // XK_signaturemark
+    0x261c: 0x0aea, // XK_leftpointer
+    0x261e: 0x0aeb, // XK_rightpointer
+    0x2640: 0x0af8, // XK_femalesymbol
+    0x2642: 0x0af7, // XK_malesymbol
+    0x2663: 0x0aec, // XK_club
+    0x2665: 0x0aee, // XK_heart
+    0x2666: 0x0aed, // XK_diamond
+    0x266d: 0x0af6, // XK_musicalflat
+    0x266f: 0x0af5, // XK_musicalsharp
+    0x2713: 0x0af3, // XK_checkmark
+    0x2717: 0x0af4, // XK_ballotcross
+    0x271d: 0x0ad9, // XK_latincross
+    0x2720: 0x0af0, // XK_maltesecross
+    0x27e8: 0x0abc, // XK_leftanglebracket
+    0x27e9: 0x0abe, // XK_rightanglebracket
+    0x3001: 0x04a4, // XK_kana_comma
+    0x3002: 0x04a1, // XK_kana_fullstop
+    0x300c: 0x04a2, // XK_kana_openingbracket
+    0x300d: 0x04a3, // XK_kana_closingbracket
+    0x309b: 0x04de, // XK_voicedsound
+    0x309c: 0x04df, // XK_semivoicedsound
+    0x30a1: 0x04a7, // XK_kana_a
+    0x30a2: 0x04b1, // XK_kana_A
+    0x30a3: 0x04a8, // XK_kana_i
+    0x30a4: 0x04b2, // XK_kana_I
+    0x30a5: 0x04a9, // XK_kana_u
+    0x30a6: 0x04b3, // XK_kana_U
+    0x30a7: 0x04aa, // XK_kana_e
+    0x30a8: 0x04b4, // XK_kana_E
+    0x30a9: 0x04ab, // XK_kana_o
+    0x30aa: 0x04b5, // XK_kana_O
+    0x30ab: 0x04b6, // XK_kana_KA
+    0x30ad: 0x04b7, // XK_kana_KI
+    0x30af: 0x04b8, // XK_kana_KU
+    0x30b1: 0x04b9, // XK_kana_KE
+    0x30b3: 0x04ba, // XK_kana_KO
+    0x30b5: 0x04bb, // XK_kana_SA
+    0x30b7: 0x04bc, // XK_kana_SHI
+    0x30b9: 0x04bd, // XK_kana_SU
+    0x30bb: 0x04be, // XK_kana_SE
+    0x30bd: 0x04bf, // XK_kana_SO
+    0x30bf: 0x04c0, // XK_kana_TA
+    0x30c1: 0x04c1, // XK_kana_CHI
+    0x30c3: 0x04af, // XK_kana_tsu
+    0x30c4: 0x04c2, // XK_kana_TSU
+    0x30c6: 0x04c3, // XK_kana_TE
+    0x30c8: 0x04c4, // XK_kana_TO
+    0x30ca: 0x04c5, // XK_kana_NA
+    0x30cb: 0x04c6, // XK_kana_NI
+    0x30cc: 0x04c7, // XK_kana_NU
+    0x30cd: 0x04c8, // XK_kana_NE
+    0x30ce: 0x04c9, // XK_kana_NO
+    0x30cf: 0x04ca, // XK_kana_HA
+    0x30d2: 0x04cb, // XK_kana_HI
+    0x30d5: 0x04cc, // XK_kana_FU
+    0x30d8: 0x04cd, // XK_kana_HE
+    0x30db: 0x04ce, // XK_kana_HO
+    0x30de: 0x04cf, // XK_kana_MA
+    0x30df: 0x04d0, // XK_kana_MI
+    0x30e0: 0x04d1, // XK_kana_MU
+    0x30e1: 0x04d2, // XK_kana_ME
+    0x30e2: 0x04d3, // XK_kana_MO
+    0x30e3: 0x04ac, // XK_kana_ya
+    0x30e4: 0x04d4, // XK_kana_YA
+    0x30e5: 0x04ad, // XK_kana_yu
+    0x30e6: 0x04d5, // XK_kana_YU
+    0x30e7: 0x04ae, // XK_kana_yo
+    0x30e8: 0x04d6, // XK_kana_YO
+    0x30e9: 0x04d7, // XK_kana_RA
+    0x30ea: 0x04d8, // XK_kana_RI
+    0x30eb: 0x04d9, // XK_kana_RU
+    0x30ec: 0x04da, // XK_kana_RE
+    0x30ed: 0x04db, // XK_kana_RO
+    0x30ef: 0x04dc, // XK_kana_WA
+    0x30f2: 0x04a6, // XK_kana_WO
+    0x30f3: 0x04dd, // XK_kana_N
+    0x30fb: 0x04a5, // XK_kana_conjunctive
+    0x30fc: 0x04b0, // XK_prolongedsound
+};
+
+export default {
+    lookup(u) {
+        // Latin-1 is one-to-one mapping
+        if ((u >= 0x20) && (u <= 0xff)) {
+            return u;
+        }
+
+        // Lookup table (fairly random)
+        const keysym = codepoints[u];
+        if (keysym !== undefined) {
+            return keysym;
+        }
+
+        // General mapping as final fallback
+        return 0x01000000 | u;
+    },
+};

static/novnc/core/input/util.js

@@ -0,0 +1,191 @@
+import KeyTable from "./keysym.js";
+import keysyms from "./keysymdef.js";
+import vkeys from "./vkeys.js";
+import fixedkeys from "./fixedkeys.js";
+import DOMKeyTable from "./domkeytable.js";
+import * as browser from "../util/browser.js";
+
+// Get 'KeyboardEvent.code', handling legacy browsers
+export function getKeycode(evt) {
+    // Are we getting proper key identifiers?
+    // (unfortunately Firefox and Chrome are crappy here and gives
+    // us an empty string on some platforms, rather than leaving it
+    // undefined)
+    if (evt.code) {
+        // Mozilla isn't fully in sync with the spec yet
+        switch (evt.code) {
+            case 'OSLeft': return 'MetaLeft';
+            case 'OSRight': return 'MetaRight';
+        }
+
+        return evt.code;
+    }
+
+    // The de-facto standard is to use Windows Virtual-Key codes
+    // in the 'keyCode' field for non-printable characters
+    if (evt.keyCode in vkeys) {
+        let code = vkeys[evt.keyCode];
+
+        // macOS has messed up this code for some reason
+        if (browser.isMac() && (code === 'ContextMenu')) {
+            code = 'MetaRight';
+        }
+
+        // The keyCode doesn't distinguish between left and right
+        // for the standard modifiers
+        if (evt.location === 2) {
+            switch (code) {
+                case 'ShiftLeft': return 'ShiftRight';
+                case 'ControlLeft': return 'ControlRight';
+                case 'AltLeft': return 'AltRight';
+            }
+        }
+
+        // Nor a bunch of the numpad keys
+        if (evt.location === 3) {
+            switch (code) {
+                case 'Delete': return 'NumpadDecimal';
+                case 'Insert': return 'Numpad0';
+                case 'End': return 'Numpad1';
+                case 'ArrowDown': return 'Numpad2';
+                case 'PageDown': return 'Numpad3';
+                case 'ArrowLeft': return 'Numpad4';
+                case 'ArrowRight': return 'Numpad6';
+                case 'Home': return 'Numpad7';
+                case 'ArrowUp': return 'Numpad8';
+                case 'PageUp': return 'Numpad9';
+                case 'Enter': return 'NumpadEnter';
+            }
+        }
+
+        return code;
+    }
+
+    return 'Unidentified';
+}
+
+// Get 'KeyboardEvent.key', handling legacy browsers
+export function getKey(evt) {
+    // Are we getting a proper key value?
+    if (evt.key !== undefined) {
+        // Mozilla isn't fully in sync with the spec yet
+        switch (evt.key) {
+            case 'OS': return 'Meta';
+            case 'LaunchMyComputer': return 'LaunchApplication1';
+            case 'LaunchCalculator': return 'LaunchApplication2';
+        }
+
+        // iOS leaks some OS names
+        switch (evt.key) {
+            case 'UIKeyInputUpArrow': return 'ArrowUp';
+            case 'UIKeyInputDownArrow': return 'ArrowDown';
+            case 'UIKeyInputLeftArrow': return 'ArrowLeft';
+            case 'UIKeyInputRightArrow': return 'ArrowRight';
+            case 'UIKeyInputEscape': return 'Escape';
+        }
+
+        // Broken behaviour in Chrome
+        if ((evt.key === '\x00') && (evt.code === 'NumpadDecimal')) {
+            return 'Delete';
+        }
+
+        return evt.key;
+    }
+
+    // Try to deduce it based on the physical key
+    const code = getKeycode(evt);
+    if (code in fixedkeys) {
+        return fixedkeys[code];
+    }
+
+    // If that failed, then see if we have a printable character
+    if (evt.charCode) {
+        return String.fromCharCode(evt.charCode);
+    }
+
+    // At this point we have nothing left to go on
+    return 'Unidentified';
+}
+
+// Get the most reliable keysym value we can get from a key event
+export function getKeysym(evt) {
+    const key = getKey(evt);
+
+    if (key === 'Unidentified') {
+        return null;
+    }
+
+    // First look up special keys
+    if (key in DOMKeyTable) {
+        let location = evt.location;
+
+        // Safari screws up location for the right cmd key
+        if ((key === 'Meta') && (location === 0)) {
+            location = 2;
+        }
+
+        // And for Clear
+        if ((key === 'Clear') && (location === 3)) {
+            let code = getKeycode(evt);
+            if (code === 'NumLock') {
+                location = 0;
+            }
+        }
+
+        if ((location === undefined) || (location > 3)) {
+            location = 0;
+        }
+
+        // The original Meta key now gets confused with the Windows key
+        // https://bugs.chromium.org/p/chromium/issues/detail?id=1020141
+        // https://bugzilla.mozilla.org/show_bug.cgi?id=1232918
+        if (key === 'Meta') {
+            let code = getKeycode(evt);
+            if (code === 'AltLeft') {
+                return KeyTable.XK_Meta_L;
+            } else if (code === 'AltRight') {
+                return KeyTable.XK_Meta_R;
+            }
+        }
+
+        // macOS has Clear instead of NumLock, but the remote system is
+        // probably not macOS, so lying here is probably best...
+        if (key === 'Clear') {
+            let code = getKeycode(evt);
+            if (code === 'NumLock') {
+                return KeyTable.XK_Num_Lock;
+            }
+        }
+
+        // Windows sends alternating symbols for some keys when using a
+        // Japanese layout. We have no way of synchronising with the IM
+        // running on the remote system, so we send some combined keysym
+        // instead and hope for the best.
+        if (browser.isWindows()) {
+            switch (key) {
+                case 'Zenkaku':
+                case 'Hankaku':
+                    return KeyTable.XK_Zenkaku_Hankaku;
+                case 'Romaji':
+                case 'KanaMode':
+                    return KeyTable.XK_Romaji;
+            }
+        }
+
+        return DOMKeyTable[key][location];
+    }
+
+    // Now we need to look at the Unicode symbol instead
+
+    // Special key? (FIXME: Should have been caught earlier)
+    if (key.length !== 1) {
+        return null;
+    }
+
+    const codepoint = key.charCodeAt();
+    if (codepoint) {
+        return keysyms.lookup(codepoint);
+    }
+
+    return null;
+}

static/novnc/core/input/vkeys.js

@@ -0,0 +1,116 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2018 The noVNC Authors
+ * Licensed under MPL 2.0 or any later version (see LICENSE.txt)
+ */
+
+/*
+ * Mapping between Microsoft® Windows® Virtual-Key codes and
+ * HTML key codes.
+ */
+
+export default {
+    0x08: 'Backspace',
+    0x09: 'Tab',
+    0x0a: 'NumpadClear',
+    0x0d: 'Enter',
+    0x10: 'ShiftLeft',
+    0x11: 'ControlLeft',
+    0x12: 'AltLeft',
+    0x13: 'Pause',
+    0x14: 'CapsLock',
+    0x15: 'Lang1',
+    0x19: 'Lang2',
+    0x1b: 'Escape',
+    0x1c: 'Convert',
+    0x1d: 'NonConvert',
+    0x20: 'Space',
+    0x21: 'PageUp',
+    0x22: 'PageDown',
+    0x23: 'End',
+    0x24: 'Home',
+    0x25: 'ArrowLeft',
+    0x26: 'ArrowUp',
+    0x27: 'ArrowRight',
+    0x28: 'ArrowDown',
+    0x29: 'Select',
+    0x2c: 'PrintScreen',
+    0x2d: 'Insert',
+    0x2e: 'Delete',
+    0x2f: 'Help',
+    0x30: 'Digit0',
+    0x31: 'Digit1',
+    0x32: 'Digit2',
+    0x33: 'Digit3',
+    0x34: 'Digit4',
+    0x35: 'Digit5',
+    0x36: 'Digit6',
+    0x37: 'Digit7',
+    0x38: 'Digit8',
+    0x39: 'Digit9',
+    0x5b: 'MetaLeft',
+    0x5c: 'MetaRight',
+    0x5d: 'ContextMenu',
+    0x5f: 'Sleep',
+    0x60: 'Numpad0',
+    0x61: 'Numpad1',
+    0x62: 'Numpad2',
+    0x63: 'Numpad3',
+    0x64: 'Numpad4',
+    0x65: 'Numpad5',
+    0x66: 'Numpad6',
+    0x67: 'Numpad7',
+    0x68: 'Numpad8',
+    0x69: 'Numpad9',
+    0x6a: 'NumpadMultiply',
+    0x6b: 'NumpadAdd',
+    0x6c: 'NumpadDecimal',
+    0x6d: 'NumpadSubtract',
+    0x6e: 'NumpadDecimal', // Duplicate, because buggy on Windows
+    0x6f: 'NumpadDivide',
+    0x70: 'F1',
+    0x71: 'F2',
+    0x72: 'F3',
+    0x73: 'F4',
+    0x74: 'F5',
+    0x75: 'F6',
+    0x76: 'F7',
+    0x77: 'F8',
+    0x78: 'F9',
+    0x79: 'F10',
+    0x7a: 'F11',
+    0x7b: 'F12',
+    0x7c: 'F13',
+    0x7d: 'F14',
+    0x7e: 'F15',
+    0x7f: 'F16',
+    0x80: 'F17',
+    0x81: 'F18',
+    0x82: 'F19',
+    0x83: 'F20',
+    0x84: 'F21',
+    0x85: 'F22',
+    0x86: 'F23',
+    0x87: 'F24',
+    0x90: 'NumLock',
+    0x91: 'ScrollLock',
+    0xa6: 'BrowserBack',
+    0xa7: 'BrowserForward',
+    0xa8: 'BrowserRefresh',
+    0xa9: 'BrowserStop',
+    0xaa: 'BrowserSearch',
+    0xab: 'BrowserFavorites',
+    0xac: 'BrowserHome',
+    0xad: 'AudioVolumeMute',
+    0xae: 'AudioVolumeDown',
+    0xaf: 'AudioVolumeUp',
+    0xb0: 'MediaTrackNext',
+    0xb1: 'MediaTrackPrevious',
+    0xb2: 'MediaStop',
+    0xb3: 'MediaPlayPause',
+    0xb4: 'LaunchMail',
+    0xb5: 'MediaSelect',
+    0xb6: 'LaunchApp1',
+    0xb7: 'LaunchApp2',
+    0xe1: 'AltRight', // Only when it is AltGraph
+};

static/novnc/core/input/xtscancodes.js

@@ -0,0 +1,173 @@
+/*
+ * This file is auto-generated from keymaps.csv
+ * Database checksum sha256(76d68c10e97d37fe2ea459e210125ae41796253fb217e900bf2983ade13a7920)
+ * To re-generate, run:
+ *   keymap-gen code-map --lang=js keymaps.csv html atset1
+*/
+export default {
+  "Again": 0xe005, /* html:Again (Again) -> linux:129 (KEY_AGAIN) -> atset1:57349 */
+  "AltLeft": 0x38, /* html:AltLeft (AltLeft) -> linux:56 (KEY_LEFTALT) -> atset1:56 */
+  "AltRight": 0xe038, /* html:AltRight (AltRight) -> linux:100 (KEY_RIGHTALT) -> atset1:57400 */
+  "ArrowDown": 0xe050, /* html:ArrowDown (ArrowDown) -> linux:108 (KEY_DOWN) -> atset1:57424 */
+  "ArrowLeft": 0xe04b, /* html:ArrowLeft (ArrowLeft) -> linux:105 (KEY_LEFT) -> atset1:57419 */
+  "ArrowRight": 0xe04d, /* html:ArrowRight (ArrowRight) -> linux:106 (KEY_RIGHT) -> atset1:57421 */
+  "ArrowUp": 0xe048, /* html:ArrowUp (ArrowUp) -> linux:103 (KEY_UP) -> atset1:57416 */
+  "AudioVolumeDown": 0xe02e, /* html:AudioVolumeDown (AudioVolumeDown) -> linux:114 (KEY_VOLUMEDOWN) -> atset1:57390 */
+  "AudioVolumeMute": 0xe020, /* html:AudioVolumeMute (AudioVolumeMute) -> linux:113 (KEY_MUTE) -> atset1:57376 */
+  "AudioVolumeUp": 0xe030, /* html:AudioVolumeUp (AudioVolumeUp) -> linux:115 (KEY_VOLUMEUP) -> atset1:57392 */
+  "Backquote": 0x29, /* html:Backquote (Backquote) -> linux:41 (KEY_GRAVE) -> atset1:41 */
+  "Backslash": 0x2b, /* html:Backslash (Backslash) -> linux:43 (KEY_BACKSLASH) -> atset1:43 */
+  "Backspace": 0xe, /* html:Backspace (Backspace) -> linux:14 (KEY_BACKSPACE) -> atset1:14 */
+  "BracketLeft": 0x1a, /* html:BracketLeft (BracketLeft) -> linux:26 (KEY_LEFTBRACE) -> atset1:26 */
+  "BracketRight": 0x1b, /* html:BracketRight (BracketRight) -> linux:27 (KEY_RIGHTBRACE) -> atset1:27 */
+  "BrowserBack": 0xe06a, /* html:BrowserBack (BrowserBack) -> linux:158 (KEY_BACK) -> atset1:57450 */
+  "BrowserFavorites": 0xe066, /* html:BrowserFavorites (BrowserFavorites) -> linux:156 (KEY_BOOKMARKS) -> atset1:57446 */
+  "BrowserForward": 0xe069, /* html:BrowserForward (BrowserForward) -> linux:159 (KEY_FORWARD) -> atset1:57449 */
+  "BrowserHome": 0xe032, /* html:BrowserHome (BrowserHome) -> linux:172 (KEY_HOMEPAGE) -> atset1:57394 */
+  "BrowserRefresh": 0xe067, /* html:BrowserRefresh (BrowserRefresh) -> linux:173 (KEY_REFRESH) -> atset1:57447 */
+  "BrowserSearch": 0xe065, /* html:BrowserSearch (BrowserSearch) -> linux:217 (KEY_SEARCH) -> atset1:57445 */
+  "BrowserStop": 0xe068, /* html:BrowserStop (BrowserStop) -> linux:128 (KEY_STOP) -> atset1:57448 */
+  "CapsLock": 0x3a, /* html:CapsLock (CapsLock) -> linux:58 (KEY_CAPSLOCK) -> atset1:58 */
+  "Comma": 0x33, /* html:Comma (Comma) -> linux:51 (KEY_COMMA) -> atset1:51 */
+  "ContextMenu": 0xe05d, /* html:ContextMenu (ContextMenu) -> linux:127 (KEY_COMPOSE) -> atset1:57437 */
+  "ControlLeft": 0x1d, /* html:ControlLeft (ControlLeft) -> linux:29 (KEY_LEFTCTRL) -> atset1:29 */
+  "ControlRight": 0xe01d, /* html:ControlRight (ControlRight) -> linux:97 (KEY_RIGHTCTRL) -> atset1:57373 */
+  "Convert": 0x79, /* html:Convert (Convert) -> linux:92 (KEY_HENKAN) -> atset1:121 */
+  "Copy": 0xe078, /* html:Copy (Copy) -> linux:133 (KEY_COPY) -> atset1:57464 */
+  "Cut": 0xe03c, /* html:Cut (Cut) -> linux:137 (KEY_CUT) -> atset1:57404 */
+  "Delete": 0xe053, /* html:Delete (Delete) -> linux:111 (KEY_DELETE) -> atset1:57427 */
+  "Digit0": 0xb, /* html:Digit0 (Digit0) -> linux:11 (KEY_0) -> atset1:11 */
+  "Digit1": 0x2, /* html:Digit1 (Digit1) -> linux:2 (KEY_1) -> atset1:2 */
+  "Digit2": 0x3, /* html:Digit2 (Digit2) -> linux:3 (KEY_2) -> atset1:3 */
+  "Digit3": 0x4, /* html:Digit3 (Digit3) -> linux:4 (KEY_3) -> atset1:4 */
+  "Digit4": 0x5, /* html:Digit4 (Digit4) -> linux:5 (KEY_4) -> atset1:5 */
+  "Digit5": 0x6, /* html:Digit5 (Digit5) -> linux:6 (KEY_5) -> atset1:6 */
+  "Digit6": 0x7, /* html:Digit6 (Digit6) -> linux:7 (KEY_6) -> atset1:7 */
+  "Digit7": 0x8, /* html:Digit7 (Digit7) -> linux:8 (KEY_7) -> atset1:8 */
+  "Digit8": 0x9, /* html:Digit8 (Digit8) -> linux:9 (KEY_8) -> atset1:9 */
+  "Digit9": 0xa, /* html:Digit9 (Digit9) -> linux:10 (KEY_9) -> atset1:10 */
+  "Eject": 0xe07d, /* html:Eject (Eject) -> linux:162 (KEY_EJECTCLOSECD) -> atset1:57469 */
+  "End": 0xe04f, /* html:End (End) -> linux:107 (KEY_END) -> atset1:57423 */
+  "Enter": 0x1c, /* html:Enter (Enter) -> linux:28 (KEY_ENTER) -> atset1:28 */
+  "Equal": 0xd, /* html:Equal (Equal) -> linux:13 (KEY_EQUAL) -> atset1:13 */
+  "Escape": 0x1, /* html:Escape (Escape) -> linux:1 (KEY_ESC) -> atset1:1 */
+  "F1": 0x3b, /* html:F1 (F1) -> linux:59 (KEY_F1) -> atset1:59 */
+  "F10": 0x44, /* html:F10 (F10) -> linux:68 (KEY_F10) -> atset1:68 */
+  "F11": 0x57, /* html:F11 (F11) -> linux:87 (KEY_F11) -> atset1:87 */
+  "F12": 0x58, /* html:F12 (F12) -> linux:88 (KEY_F12) -> atset1:88 */
+  "F13": 0x5d, /* html:F13 (F13) -> linux:183 (KEY_F13) -> atset1:93 */
+  "F14": 0x5e, /* html:F14 (F14) -> linux:184 (KEY_F14) -> atset1:94 */
+  "F15": 0x5f, /* html:F15 (F15) -> linux:185 (KEY_F15) -> atset1:95 */
+  "F16": 0x55, /* html:F16 (F16) -> linux:186 (KEY_F16) -> atset1:85 */
+  "F17": 0xe003, /* html:F17 (F17) -> linux:187 (KEY_F17) -> atset1:57347 */
+  "F18": 0xe077, /* html:F18 (F18) -> linux:188 (KEY_F18) -> atset1:57463 */
+  "F19": 0xe004, /* html:F19 (F19) -> linux:189 (KEY_F19) -> atset1:57348 */
+  "F2": 0x3c, /* html:F2 (F2) -> linux:60 (KEY_F2) -> atset1:60 */
+  "F20": 0x5a, /* html:F20 (F20) -> linux:190 (KEY_F20) -> atset1:90 */
+  "F21": 0x74, /* html:F21 (F21) -> linux:191 (KEY_F21) -> atset1:116 */
+  "F22": 0xe079, /* html:F22 (F22) -> linux:192 (KEY_F22) -> atset1:57465 */
+  "F23": 0x6d, /* html:F23 (F23) -> linux:193 (KEY_F23) -> atset1:109 */
+  "F24": 0x6f, /* html:F24 (F24) -> linux:194 (KEY_F24) -> atset1:111 */
+  "F3": 0x3d, /* html:F3 (F3) -> linux:61 (KEY_F3) -> atset1:61 */
+  "F4": 0x3e, /* html:F4 (F4) -> linux:62 (KEY_F4) -> atset1:62 */
+  "F5": 0x3f, /* html:F5 (F5) -> linux:63 (KEY_F5) -> atset1:63 */
+  "F6": 0x40, /* html:F6 (F6) -> linux:64 (KEY_F6) -> atset1:64 */
+  "F7": 0x41, /* html:F7 (F7) -> linux:65 (KEY_F7) -> atset1:65 */
+  "F8": 0x42, /* html:F8 (F8) -> linux:66 (KEY_F8) -> atset1:66 */
+  "F9": 0x43, /* html:F9 (F9) -> linux:67 (KEY_F9) -> atset1:67 */
+  "Find": 0xe041, /* html:Find (Find) -> linux:136 (KEY_FIND) -> atset1:57409 */
+  "Help": 0xe075, /* html:Help (Help) -> linux:138 (KEY_HELP) -> atset1:57461 */
+  "Hiragana": 0x77, /* html:Hiragana (Lang4) -> linux:91 (KEY_HIRAGANA) -> atset1:119 */
+  "Home": 0xe047, /* html:Home (Home) -> linux:102 (KEY_HOME) -> atset1:57415 */
+  "Insert": 0xe052, /* html:Insert (Insert) -> linux:110 (KEY_INSERT) -> atset1:57426 */
+  "IntlBackslash": 0x56, /* html:IntlBackslash (IntlBackslash) -> linux:86 (KEY_102ND) -> atset1:86 */
+  "IntlRo": 0x73, /* html:IntlRo (IntlRo) -> linux:89 (KEY_RO) -> atset1:115 */
+  "IntlYen": 0x7d, /* html:IntlYen (IntlYen) -> linux:124 (KEY_YEN) -> atset1:125 */
+  "KanaMode": 0x70, /* html:KanaMode (KanaMode) -> linux:93 (KEY_KATAKANAHIRAGANA) -> atset1:112 */
+  "Katakana": 0x78, /* html:Katakana (Lang3) -> linux:90 (KEY_KATAKANA) -> atset1:120 */
+  "KeyA": 0x1e, /* html:KeyA (KeyA) -> linux:30 (KEY_A) -> atset1:30 */
+  "KeyB": 0x30, /* html:KeyB (KeyB) -> linux:48 (KEY_B) -> atset1:48 */
+  "KeyC": 0x2e, /* html:KeyC (KeyC) -> linux:46 (KEY_C) -> atset1:46 */
+  "KeyD": 0x20, /* html:KeyD (KeyD) -> linux:32 (KEY_D) -> atset1:32 */
+  "KeyE": 0x12, /* html:KeyE (KeyE) -> linux:18 (KEY_E) -> atset1:18 */
+  "KeyF": 0x21, /* html:KeyF (KeyF) -> linux:33 (KEY_F) -> atset1:33 */
+  "KeyG": 0x22, /* html:KeyG (KeyG) -> linux:34 (KEY_G) -> atset1:34 */
+  "KeyH": 0x23, /* html:KeyH (KeyH) -> linux:35 (KEY_H) -> atset1:35 */
+  "KeyI": 0x17, /* html:KeyI (KeyI) -> linux:23 (KEY_I) -> atset1:23 */
+  "KeyJ": 0x24, /* html:KeyJ (KeyJ) -> linux:36 (KEY_J) -> atset1:36 */
+  "KeyK": 0x25, /* html:KeyK (KeyK) -> linux:37 (KEY_K) -> atset1:37 */
+  "KeyL": 0x26, /* html:KeyL (KeyL) -> linux:38 (KEY_L) -> atset1:38 */
+  "KeyM": 0x32, /* html:KeyM (KeyM) -> linux:50 (KEY_M) -> atset1:50 */
+  "KeyN": 0x31, /* html:KeyN (KeyN) -> linux:49 (KEY_N) -> atset1:49 */
+  "KeyO": 0x18, /* html:KeyO (KeyO) -> linux:24 (KEY_O) -> atset1:24 */
+  "KeyP": 0x19, /* html:KeyP (KeyP) -> linux:25 (KEY_P) -> atset1:25 */
+  "KeyQ": 0x10, /* html:KeyQ (KeyQ) -> linux:16 (KEY_Q) -> atset1:16 */
+  "KeyR": 0x13, /* html:KeyR (KeyR) -> linux:19 (KEY_R) -> atset1:19 */
+  "KeyS": 0x1f, /* html:KeyS (KeyS) -> linux:31 (KEY_S) -> atset1:31 */
+  "KeyT": 0x14, /* html:KeyT (KeyT) -> linux:20 (KEY_T) -> atset1:20 */
+  "KeyU": 0x16, /* html:KeyU (KeyU) -> linux:22 (KEY_U) -> atset1:22 */
+  "KeyV": 0x2f, /* html:KeyV (KeyV) -> linux:47 (KEY_V) -> atset1:47 */
+  "KeyW": 0x11, /* html:KeyW (KeyW) -> linux:17 (KEY_W) -> atset1:17 */
+  "KeyX": 0x2d, /* html:KeyX (KeyX) -> linux:45 (KEY_X) -> atset1:45 */
+  "KeyY": 0x15, /* html:KeyY (KeyY) -> linux:21 (KEY_Y) -> atset1:21 */
+  "KeyZ": 0x2c, /* html:KeyZ (KeyZ) -> linux:44 (KEY_Z) -> atset1:44 */
+  "Lang1": 0x72, /* html:Lang1 (Lang1) -> linux:122 (KEY_HANGEUL) -> atset1:114 */
+  "Lang2": 0x71, /* html:Lang2 (Lang2) -> linux:123 (KEY_HANJA) -> atset1:113 */
+  "Lang3": 0x78, /* html:Lang3 (Lang3) -> linux:90 (KEY_KATAKANA) -> atset1:120 */
+  "Lang4": 0x77, /* html:Lang4 (Lang4) -> linux:91 (KEY_HIRAGANA) -> atset1:119 */
+  "Lang5": 0x76, /* html:Lang5 (Lang5) -> linux:85 (KEY_ZENKAKUHANKAKU) -> atset1:118 */
+  "LaunchApp1": 0xe06b, /* html:LaunchApp1 (LaunchApp1) -> linux:157 (KEY_COMPUTER) -> atset1:57451 */
+  "LaunchApp2": 0xe021, /* html:LaunchApp2 (LaunchApp2) -> linux:140 (KEY_CALC) -> atset1:57377 */
+  "LaunchMail": 0xe06c, /* html:LaunchMail (LaunchMail) -> linux:155 (KEY_MAIL) -> atset1:57452 */
+  "MediaPlayPause": 0xe022, /* html:MediaPlayPause (MediaPlayPause) -> linux:164 (KEY_PLAYPAUSE) -> atset1:57378 */
+  "MediaSelect": 0xe06d, /* html:MediaSelect (MediaSelect) -> linux:226 (KEY_MEDIA) -> atset1:57453 */
+  "MediaStop": 0xe024, /* html:MediaStop (MediaStop) -> linux:166 (KEY_STOPCD) -> atset1:57380 */
+  "MediaTrackNext": 0xe019, /* html:MediaTrackNext (MediaTrackNext) -> linux:163 (KEY_NEXTSONG) -> atset1:57369 */
+  "MediaTrackPrevious": 0xe010, /* html:MediaTrackPrevious (MediaTrackPrevious) -> linux:165 (KEY_PREVIOUSSONG) -> atset1:57360 */
+  "MetaLeft": 0xe05b, /* html:MetaLeft (MetaLeft) -> linux:125 (KEY_LEFTMETA) -> atset1:57435 */
+  "MetaRight": 0xe05c, /* html:MetaRight (MetaRight) -> linux:126 (KEY_RIGHTMETA) -> atset1:57436 */
+  "Minus": 0xc, /* html:Minus (Minus) -> linux:12 (KEY_MINUS) -> atset1:12 */
+  "NonConvert": 0x7b, /* html:NonConvert (NonConvert) -> linux:94 (KEY_MUHENKAN) -> atset1:123 */
+  "NumLock": 0x45, /* html:NumLock (NumLock) -> linux:69 (KEY_NUMLOCK) -> atset1:69 */
+  "Numpad0": 0x52, /* html:Numpad0 (Numpad0) -> linux:82 (KEY_KP0) -> atset1:82 */
+  "Numpad1": 0x4f, /* html:Numpad1 (Numpad1) -> linux:79 (KEY_KP1) -> atset1:79 */
+  "Numpad2": 0x50, /* html:Numpad2 (Numpad2) -> linux:80 (KEY_KP2) -> atset1:80 */
+  "Numpad3": 0x51, /* html:Numpad3 (Numpad3) -> linux:81 (KEY_KP3) -> atset1:81 */
+  "Numpad4": 0x4b, /* html:Numpad4 (Numpad4) -> linux:75 (KEY_KP4) -> atset1:75 */
+  "Numpad5": 0x4c, /* html:Numpad5 (Numpad5) -> linux:76 (KEY_KP5) -> atset1:76 */
+  "Numpad6": 0x4d, /* html:Numpad6 (Numpad6) -> linux:77 (KEY_KP6) -> atset1:77 */
+  "Numpad7": 0x47, /* html:Numpad7 (Numpad7) -> linux:71 (KEY_KP7) -> atset1:71 */
+  "Numpad8": 0x48, /* html:Numpad8 (Numpad8) -> linux:72 (KEY_KP8) -> atset1:72 */
+  "Numpad9": 0x49, /* html:Numpad9 (Numpad9) -> linux:73 (KEY_KP9) -> atset1:73 */
+  "NumpadAdd": 0x4e, /* html:NumpadAdd (NumpadAdd) -> linux:78 (KEY_KPPLUS) -> atset1:78 */
+  "NumpadComma": 0x7e, /* html:NumpadComma (NumpadComma) -> linux:121 (KEY_KPCOMMA) -> atset1:126 */
+  "NumpadDecimal": 0x53, /* html:NumpadDecimal (NumpadDecimal) -> linux:83 (KEY_KPDOT) -> atset1:83 */
+  "NumpadDivide": 0xe035, /* html:NumpadDivide (NumpadDivide) -> linux:98 (KEY_KPSLASH) -> atset1:57397 */
+  "NumpadEnter": 0xe01c, /* html:NumpadEnter (NumpadEnter) -> linux:96 (KEY_KPENTER) -> atset1:57372 */
+  "NumpadEqual": 0x59, /* html:NumpadEqual (NumpadEqual) -> linux:117 (KEY_KPEQUAL) -> atset1:89 */
+  "NumpadMultiply": 0x37, /* html:NumpadMultiply (NumpadMultiply) -> linux:55 (KEY_KPASTERISK) -> atset1:55 */
+  "NumpadParenLeft": 0xe076, /* html:NumpadParenLeft (NumpadParenLeft) -> linux:179 (KEY_KPLEFTPAREN) -> atset1:57462 */
+  "NumpadParenRight": 0xe07b, /* html:NumpadParenRight (NumpadParenRight) -> linux:180 (KEY_KPRIGHTPAREN) -> atset1:57467 */
+  "NumpadSubtract": 0x4a, /* html:NumpadSubtract (NumpadSubtract) -> linux:74 (KEY_KPMINUS) -> atset1:74 */
+  "Open": 0x64, /* html:Open (Open) -> linux:134 (KEY_OPEN) -> atset1:100 */
+  "PageDown": 0xe051, /* html:PageDown (PageDown) -> linux:109 (KEY_PAGEDOWN) -> atset1:57425 */
+  "PageUp": 0xe049, /* html:PageUp (PageUp) -> linux:104 (KEY_PAGEUP) -> atset1:57417 */
+  "Paste": 0x65, /* html:Paste (Paste) -> linux:135 (KEY_PASTE) -> atset1:101 */
+  "Pause": 0xe046, /* html:Pause (Pause) -> linux:119 (KEY_PAUSE) -> atset1:57414 */
+  "Period": 0x34, /* html:Period (Period) -> linux:52 (KEY_DOT) -> atset1:52 */
+  "Power": 0xe05e, /* html:Power (Power) -> linux:116 (KEY_POWER) -> atset1:57438 */
+  "PrintScreen": 0x54, /* html:PrintScreen (PrintScreen) -> linux:99 (KEY_SYSRQ) -> atset1:84 */
+  "Props": 0xe006, /* html:Props (Props) -> linux:130 (KEY_PROPS) -> atset1:57350 */
+  "Quote": 0x28, /* html:Quote (Quote) -> linux:40 (KEY_APOSTROPHE) -> atset1:40 */
+  "ScrollLock": 0x46, /* html:ScrollLock (ScrollLock) -> linux:70 (KEY_SCROLLLOCK) -> atset1:70 */
+  "Semicolon": 0x27, /* html:Semicolon (Semicolon) -> linux:39 (KEY_SEMICOLON) -> atset1:39 */
+  "ShiftLeft": 0x2a, /* html:ShiftLeft (ShiftLeft) -> linux:42 (KEY_LEFTSHIFT) -> atset1:42 */
+  "ShiftRight": 0x36, /* html:ShiftRight (ShiftRight) -> linux:54 (KEY_RIGHTSHIFT) -> atset1:54 */
+  "Slash": 0x35, /* html:Slash (Slash) -> linux:53 (KEY_SLASH) -> atset1:53 */
+  "Sleep": 0xe05f, /* html:Sleep (Sleep) -> linux:142 (KEY_SLEEP) -> atset1:57439 */
+  "Space": 0x39, /* html:Space (Space) -> linux:57 (KEY_SPACE) -> atset1:57 */
+  "Suspend": 0xe025, /* html:Suspend (Suspend) -> linux:205 (KEY_SUSPEND) -> atset1:57381 */
+  "Tab": 0xf, /* html:Tab (Tab) -> linux:15 (KEY_TAB) -> atset1:15 */
+  "Undo": 0xe007, /* html:Undo (Undo) -> linux:131 (KEY_UNDO) -> atset1:57351 */
+  "WakeUp": 0xe063, /* html:WakeUp (WakeUp) -> linux:143 (KEY_WAKEUP) -> atset1:57443 */
+};

static/novnc/core/rfb.js

@@ -0,0 +1,2988 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2020 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ *
+ */
+
+import { toUnsigned32bit, toSigned32bit } from './util/int.js';
+import * as Log from './util/logging.js';
+import { encodeUTF8, decodeUTF8 } from './util/strings.js';
+import { dragThreshold } from './util/browser.js';
+import { clientToElement } from './util/element.js';
+import { setCapture } from './util/events.js';
+import EventTargetMixin from './util/eventtarget.js';
+import Display from "./display.js";
+import Inflator from "./inflator.js";
+import Deflator from "./deflator.js";
+import Keyboard from "./input/keyboard.js";
+import GestureHandler from "./input/gesturehandler.js";
+import Cursor from "./util/cursor.js";
+import Websock from "./websock.js";
+import DES from "./des.js";
+import KeyTable from "./input/keysym.js";
+import XtScancode from "./input/xtscancodes.js";
+import { encodings } from "./encodings.js";
+
+import RawDecoder from "./decoders/raw.js";
+import CopyRectDecoder from "./decoders/copyrect.js";
+import RREDecoder from "./decoders/rre.js";
+import HextileDecoder from "./decoders/hextile.js";
+import TightDecoder from "./decoders/tight.js";
+import TightPNGDecoder from "./decoders/tightpng.js";
+
+// How many seconds to wait for a disconnect to finish
+const DISCONNECT_TIMEOUT = 3;
+const DEFAULT_BACKGROUND = 'rgb(40, 40, 40)';
+
+// Minimum wait (ms) between two mouse moves
+const MOUSE_MOVE_DELAY = 17;
+
+// Wheel thresholds
+const WHEEL_STEP = 50; // Pixels needed for one step
+const WHEEL_LINE_HEIGHT = 19; // Assumed pixels for one line step
+
+// Gesture thresholds
+const GESTURE_ZOOMSENS = 75;
+const GESTURE_SCRLSENS = 50;
+const DOUBLE_TAP_TIMEOUT = 1000;
+const DOUBLE_TAP_THRESHOLD = 50;
+
+// Extended clipboard pseudo-encoding formats
+const extendedClipboardFormatText   = 1;
+/*eslint-disable no-unused-vars */
+const extendedClipboardFormatRtf    = 1 << 1;
+const extendedClipboardFormatHtml   = 1 << 2;
+const extendedClipboardFormatDib    = 1 << 3;
+const extendedClipboardFormatFiles  = 1 << 4;
+/*eslint-enable */
+
+// Extended clipboard pseudo-encoding actions
+const extendedClipboardActionCaps    = 1 << 24;
+const extendedClipboardActionRequest = 1 << 25;
+const extendedClipboardActionPeek    = 1 << 26;
+const extendedClipboardActionNotify  = 1 << 27;
+const extendedClipboardActionProvide = 1 << 28;
+
+export default class RFB extends EventTargetMixin {
+    constructor(target, urlOrChannel, options) {
+        if (!target) {
+            throw new Error("Must specify target");
+        }
+        if (!urlOrChannel) {
+            throw new Error("Must specify URL, WebSocket or RTCDataChannel");
+        }
+
+        super();
+
+        this._target = target;
+
+        if (typeof urlOrChannel === "string") {
+            this._url = urlOrChannel;
+        } else {
+            this._url = null;
+            this._rawChannel = urlOrChannel;
+        }
+
+        // Connection details
+        options = options || {};
+        this._rfbCredentials = options.credentials || {};
+        this._shared = 'shared' in options ? !!options.shared : true;
+        this._repeaterID = options.repeaterID || '';
+        this._wsProtocols = options.wsProtocols || [];
+
+        // Internal state
+        this._rfbConnectionState = '';
+        this._rfbInitState = '';
+        this._rfbAuthScheme = -1;
+        this._rfbCleanDisconnect = true;
+
+        // Server capabilities
+        this._rfbVersion = 0;
+        this._rfbMaxVersion = 3.8;
+        this._rfbTightVNC = false;
+        this._rfbVeNCryptState = 0;
+        this._rfbXvpVer = 0;
+
+        this._fbWidth = 0;
+        this._fbHeight = 0;
+
+        this._fbName = "";
+
+        this._capabilities = { power: false };
+
+        this._supportsFence = false;
+
+        this._supportsContinuousUpdates = false;
+        this._enabledContinuousUpdates = false;
+
+        this._supportsSetDesktopSize = false;
+        this._screenID = 0;
+        this._screenFlags = 0;
+
+        this._qemuExtKeyEventSupported = false;
+
+        this._clipboardText = null;
+        this._clipboardServerCapabilitiesActions = {};
+        this._clipboardServerCapabilitiesFormats = {};
+
+        // Internal objects
+        this._sock = null;              // Websock object
+        this._display = null;           // Display object
+        this._flushing = false;         // Display flushing state
+        this._keyboard = null;          // Keyboard input handler object
+        this._gestures = null;          // Gesture input handler object
+        this._resizeObserver = null;    // Resize observer object
+
+        // Timers
+        this._disconnTimer = null;      // disconnection timer
+        this._resizeTimeout = null;     // resize rate limiting
+        this._mouseMoveTimer = null;
+
+        // Decoder states
+        this._decoders = {};
+
+        this._FBU = {
+            rects: 0,
+            x: 0,
+            y: 0,
+            width: 0,
+            height: 0,
+            encoding: null,
+        };
+
+        // Mouse state
+        this._mousePos = {};
+        this._mouseButtonMask = 0;
+        this._mouseLastMoveTime = 0;
+        this._viewportDragging = false;
+        this._viewportDragPos = {};
+        this._viewportHasMoved = false;
+        this._accumulatedWheelDeltaX = 0;
+        this._accumulatedWheelDeltaY = 0;
+
+        // Gesture state
+        this._gestureLastTapTime = null;
+        this._gestureFirstDoubleTapEv = null;
+        this._gestureLastMagnitudeX = 0;
+        this._gestureLastMagnitudeY = 0;
+
+        // Bound event handlers
+        this._eventHandlers = {
+            focusCanvas: this._focusCanvas.bind(this),
+            handleResize: this._handleResize.bind(this),
+            handleMouse: this._handleMouse.bind(this),
+            handleWheel: this._handleWheel.bind(this),
+            handleGesture: this._handleGesture.bind(this),
+        };
+
+        // main setup
+        Log.Debug(">> RFB.constructor");
+
+        // Create DOM elements
+        this._screen = document.createElement('div');
+        this._screen.style.display = 'flex';
+        this._screen.style.width = '100%';
+        this._screen.style.height = '100%';
+        this._screen.style.overflow = 'auto';
+        this._screen.style.background = DEFAULT_BACKGROUND;
+        this._canvas = document.createElement('canvas');
+        this._canvas.style.margin = 'auto';
+        // Some browsers add an outline on focus
+        this._canvas.style.outline = 'none';
+        this._canvas.width = 0;
+        this._canvas.height = 0;
+        this._canvas.tabIndex = -1;
+        this._screen.appendChild(this._canvas);
+
+        // Cursor
+        this._cursor = new Cursor();
+
+        // XXX: TightVNC 2.8.11 sends no cursor at all until Windows changes
+        // it. Result: no cursor at all until a window border or an edit field
+        // is hit blindly. But there are also VNC servers that draw the cursor
+        // in the framebuffer and don't send the empty local cursor. There is
+        // no way to satisfy both sides.
+        //
+        // The spec is unclear on this "initial cursor" issue. Many other
+        // viewers (TigerVNC, RealVNC, Remmina) display an arrow as the
+        // initial cursor instead.
+        this._cursorImage = RFB.cursors.none;
+
+        // populate decoder array with objects
+        this._decoders[encodings.encodingRaw] = new RawDecoder();
+        this._decoders[encodings.encodingCopyRect] = new CopyRectDecoder();
+        this._decoders[encodings.encodingRRE] = new RREDecoder();
+        this._decoders[encodings.encodingHextile] = new HextileDecoder();
+        this._decoders[encodings.encodingTight] = new TightDecoder();
+        this._decoders[encodings.encodingTightPNG] = new TightPNGDecoder();
+
+        // NB: nothing that needs explicit teardown should be done
+        // before this point, since this can throw an exception
+        try {
+            this._display = new Display(this._canvas);
+        } catch (exc) {
+            Log.Error("Display exception: " + exc);
+            throw exc;
+        }
+        this._display.onflush = this._onFlush.bind(this);
+
+        this._keyboard = new Keyboard(this._canvas);
+        this._keyboard.onkeyevent = this._handleKeyEvent.bind(this);
+
+        this._gestures = new GestureHandler();
+
+        this._sock = new Websock();
+        this._sock.on('open', this._socketOpen.bind(this));
+        this._sock.on('close', this._socketClose.bind(this));
+        this._sock.on('message', this._handleMessage.bind(this));
+        this._sock.on('error', this._socketError.bind(this));
+
+        this._resizeObserver = new ResizeObserver(this._eventHandlers.handleResize);
+
+        // All prepared, kick off the connection
+        this._updateConnectionState('connecting');
+
+        Log.Debug("<< RFB.constructor");
+
+        // ===== PROPERTIES =====
+
+        this.dragViewport = false;
+        this.focusOnClick = true;
+
+        this._viewOnly = false;
+        this._clipViewport = false;
+        this._scaleViewport = false;
+        this._resizeSession = false;
+
+        this._showDotCursor = false;
+        if (options.showDotCursor !== undefined) {
+            Log.Warn("Specifying showDotCursor as a RFB constructor argument is deprecated");
+            this._showDotCursor = options.showDotCursor;
+        }
+
+        this._qualityLevel = 6;
+        this._compressionLevel = 2;
+    }
+
+    // ===== PROPERTIES =====
+
+    get viewOnly() { return this._viewOnly; }
+    set viewOnly(viewOnly) {
+        this._viewOnly = viewOnly;
+
+        if (this._rfbConnectionState === "connecting" ||
+            this._rfbConnectionState === "connected") {
+            if (viewOnly) {
+                this._keyboard.ungrab();
+            } else {
+                this._keyboard.grab();
+            }
+        }
+    }
+
+    get capabilities() { return this._capabilities; }
+
+    get touchButton() { return 0; }
+    set touchButton(button) { Log.Warn("Using old API!"); }
+
+    get clipViewport() { return this._clipViewport; }
+    set clipViewport(viewport) {
+        this._clipViewport = viewport;
+        this._updateClip();
+    }
+
+    get scaleViewport() { return this._scaleViewport; }
+    set scaleViewport(scale) {
+        this._scaleViewport = scale;
+        // Scaling trumps clipping, so we may need to adjust
+        // clipping when enabling or disabling scaling
+        if (scale && this._clipViewport) {
+            this._updateClip();
+        }
+        this._updateScale();
+        if (!scale && this._clipViewport) {
+            this._updateClip();
+        }
+    }
+
+    get resizeSession() { return this._resizeSession; }
+    set resizeSession(resize) {
+        this._resizeSession = resize;
+        if (resize) {
+            this._requestRemoteResize();
+        }
+    }
+
+    get showDotCursor() { return this._showDotCursor; }
+    set showDotCursor(show) {
+        this._showDotCursor = show;
+        this._refreshCursor();
+    }
+
+    get background() { return this._screen.style.background; }
+    set background(cssValue) { this._screen.style.background = cssValue; }
+
+    get qualityLevel() {
+        return this._qualityLevel;
+    }
+    set qualityLevel(qualityLevel) {
+        if (!Number.isInteger(qualityLevel) || qualityLevel < 0 || qualityLevel > 9) {
+            Log.Error("qualityLevel must be an integer between 0 and 9");
+            return;
+        }
+
+        if (this._qualityLevel === qualityLevel) {
+            return;
+        }
+
+        this._qualityLevel = qualityLevel;
+
+        if (this._rfbConnectionState === 'connected') {
+            this._sendEncodings();
+        }
+    }
+
+    get compressionLevel() {
+        return this._compressionLevel;
+    }
+    set compressionLevel(compressionLevel) {
+        if (!Number.isInteger(compressionLevel) || compressionLevel < 0 || compressionLevel > 9) {
+            Log.Error("compressionLevel must be an integer between 0 and 9");
+            return;
+        }
+
+        if (this._compressionLevel === compressionLevel) {
+            return;
+        }
+
+        this._compressionLevel = compressionLevel;
+
+        if (this._rfbConnectionState === 'connected') {
+            this._sendEncodings();
+        }
+    }
+
+    // ===== PUBLIC METHODS =====
+
+    disconnect() {
+        this._updateConnectionState('disconnecting');
+        this._sock.off('error');
+        this._sock.off('message');
+        this._sock.off('open');
+    }
+
+    sendCredentials(creds) {
+        this._rfbCredentials = creds;
+        setTimeout(this._initMsg.bind(this), 0);
+    }
+
+    sendCtrlAltDel() {
+        if (this._rfbConnectionState !== 'connected' || this._viewOnly) { return; }
+        Log.Info("Sending Ctrl-Alt-Del");
+
+        this.sendKey(KeyTable.XK_Control_L, "ControlLeft", true);
+        this.sendKey(KeyTable.XK_Alt_L, "AltLeft", true);
+        this.sendKey(KeyTable.XK_Delete, "Delete", true);
+        this.sendKey(KeyTable.XK_Delete, "Delete", false);
+        this.sendKey(KeyTable.XK_Alt_L, "AltLeft", false);
+        this.sendKey(KeyTable.XK_Control_L, "ControlLeft", false);
+    }
+
+    machineShutdown() {
+        this._xvpOp(1, 2);
+    }
+
+    machineReboot() {
+        this._xvpOp(1, 3);
+    }
+
+    machineReset() {
+        this._xvpOp(1, 4);
+    }
+
+    // Send a key press. If 'down' is not specified then send a down key
+    // followed by an up key.
+    sendKey(keysym, code, down) {
+        if (this._rfbConnectionState !== 'connected' || this._viewOnly) { return; }
+
+        if (down === undefined) {
+            this.sendKey(keysym, code, true);
+            this.sendKey(keysym, code, false);
+            return;
+        }
+
+        const scancode = XtScancode[code];
+
+        if (this._qemuExtKeyEventSupported && scancode) {
+            // 0 is NoSymbol
+            keysym = keysym || 0;
+
+            Log.Info("Sending key (" + (down ? "down" : "up") + "): keysym " + keysym + ", scancode " + scancode);
+
+            RFB.messages.QEMUExtendedKeyEvent(this._sock, keysym, down, scancode);
+        } else {
+            if (!keysym) {
+                return;
+            }
+            Log.Info("Sending keysym (" + (down ? "down" : "up") + "): " + keysym);
+            RFB.messages.keyEvent(this._sock, keysym, down ? 1 : 0);
+        }
+    }
+
+    focus() {
+        this._canvas.focus();
+    }
+
+    blur() {
+        this._canvas.blur();
+    }
+
+    clipboardPasteFrom(text) {
+        if (this._rfbConnectionState !== 'connected' || this._viewOnly) { return; }
+
+        if (this._clipboardServerCapabilitiesFormats[extendedClipboardFormatText] &&
+            this._clipboardServerCapabilitiesActions[extendedClipboardActionNotify]) {
+
+            this._clipboardText = text;
+            RFB.messages.extendedClipboardNotify(this._sock, [extendedClipboardFormatText]);
+        } else {
+            let data = new Uint8Array(text.length);
+            for (let i = 0; i < text.length; i++) {
+                // FIXME: text can have values outside of Latin1/Uint8
+                data[i] = text.charCodeAt(i);
+            }
+
+            RFB.messages.clientCutText(this._sock, data);
+        }
+    }
+
+    // ===== PRIVATE METHODS =====
+
+    _connect() {
+        Log.Debug(">> RFB.connect");
+
+        if (this._url) {
+            Log.Info(`connecting to ${this._url}`);
+            this._sock.open(this._url, this._wsProtocols);
+        } else {
+            Log.Info(`attaching ${this._rawChannel} to Websock`);
+            this._sock.attach(this._rawChannel);
+
+            if (this._sock.readyState === 'closed') {
+                throw Error("Cannot use already closed WebSocket/RTCDataChannel");
+            }
+
+            if (this._sock.readyState === 'open') {
+                // FIXME: _socketOpen() can in theory call _fail(), which
+                //        isn't allowed this early, but I'm not sure that can
+                //        happen without a bug messing up our state variables
+                this._socketOpen();
+            }
+        }
+
+        // Make our elements part of the page
+        this._target.appendChild(this._screen);
+
+        this._gestures.attach(this._canvas);
+
+        this._cursor.attach(this._canvas);
+        this._refreshCursor();
+
+        // Monitor size changes of the screen element
+        this._resizeObserver.observe(this._screen);
+
+        // Always grab focus on some kind of click event
+        this._canvas.addEventListener("mousedown", this._eventHandlers.focusCanvas);
+        this._canvas.addEventListener("touchstart", this._eventHandlers.focusCanvas);
+
+        // Mouse events
+        this._canvas.addEventListener('mousedown', this._eventHandlers.handleMouse);
+        this._canvas.addEventListener('mouseup', this._eventHandlers.handleMouse);
+        this._canvas.addEventListener('mousemove', this._eventHandlers.handleMouse);
+        // Prevent middle-click pasting (see handler for why we bind to document)
+        this._canvas.addEventListener('click', this._eventHandlers.handleMouse);
+        // preventDefault() on mousedown doesn't stop this event for some
+        // reason so we have to explicitly block it
+        this._canvas.addEventListener('contextmenu', this._eventHandlers.handleMouse);
+
+        // Wheel events
+        this._canvas.addEventListener("wheel", this._eventHandlers.handleWheel);
+
+        // Gesture events
+        this._canvas.addEventListener("gesturestart", this._eventHandlers.handleGesture);
+        this._canvas.addEventListener("gesturemove", this._eventHandlers.handleGesture);
+        this._canvas.addEventListener("gestureend", this._eventHandlers.handleGesture);
+
+        Log.Debug("<< RFB.connect");
+    }
+
+    _disconnect() {
+        Log.Debug(">> RFB.disconnect");
+        this._cursor.detach();
+        this._canvas.removeEventListener("gesturestart", this._eventHandlers.handleGesture);
+        this._canvas.removeEventListener("gesturemove", this._eventHandlers.handleGesture);
+        this._canvas.removeEventListener("gestureend", this._eventHandlers.handleGesture);
+        this._canvas.removeEventListener("wheel", this._eventHandlers.handleWheel);
+        this._canvas.removeEventListener('mousedown', this._eventHandlers.handleMouse);
+        this._canvas.removeEventListener('mouseup', this._eventHandlers.handleMouse);
+        this._canvas.removeEventListener('mousemove', this._eventHandlers.handleMouse);
+        this._canvas.removeEventListener('click', this._eventHandlers.handleMouse);
+        this._canvas.removeEventListener('contextmenu', this._eventHandlers.handleMouse);
+        this._canvas.removeEventListener("mousedown", this._eventHandlers.focusCanvas);
+        this._canvas.removeEventListener("touchstart", this._eventHandlers.focusCanvas);
+        this._resizeObserver.disconnect();
+        this._keyboard.ungrab();
+        this._gestures.detach();
+        this._sock.close();
+        try {
+            this._target.removeChild(this._screen);
+        } catch (e) {
+            if (e.name === 'NotFoundError') {
+                // Some cases where the initial connection fails
+                // can disconnect before the _screen is created
+            } else {
+                throw e;
+            }
+        }
+        clearTimeout(this._resizeTimeout);
+        clearTimeout(this._mouseMoveTimer);
+        Log.Debug("<< RFB.disconnect");
+    }
+
+    _socketOpen() {
+        if ((this._rfbConnectionState === 'connecting') &&
+            (this._rfbInitState === '')) {
+            this._rfbInitState = 'ProtocolVersion';
+            Log.Debug("Starting VNC handshake");
+        } else {
+            this._fail("Unexpected server connection while " +
+                       this._rfbConnectionState);
+        }
+    }
+
+    _socketClose(e) {
+        Log.Debug("WebSocket on-close event");
+        let msg = "";
+        if (e.code) {
+            msg = "(code: " + e.code;
+            if (e.reason) {
+                msg += ", reason: " + e.reason;
+            }
+            msg += ")";
+        }
+        switch (this._rfbConnectionState) {
+            case 'connecting':
+                this._fail("Connection closed " + msg);
+                break;
+            case 'connected':
+                // Handle disconnects that were initiated server-side
+                this._updateConnectionState('disconnecting');
+                this._updateConnectionState('disconnected');
+                break;
+            case 'disconnecting':
+                // Normal disconnection path
+                this._updateConnectionState('disconnected');
+                break;
+            case 'disconnected':
+                this._fail("Unexpected server disconnect " +
+                           "when already disconnected " + msg);
+                break;
+            default:
+                this._fail("Unexpected server disconnect before connecting " +
+                           msg);
+                break;
+        }
+        this._sock.off('close');
+        // Delete reference to raw channel to allow cleanup.
+        this._rawChannel = null;
+    }
+
+    _socketError(e) {
+        Log.Warn("WebSocket on-error event");
+    }
+
+    _focusCanvas(event) {
+        if (!this.focusOnClick) {
+            return;
+        }
+
+        this.focus();
+    }
+
+    _setDesktopName(name) {
+        this._fbName = name;
+        this.dispatchEvent(new CustomEvent(
+            "desktopname",
+            { detail: { name: this._fbName } }));
+    }
+
+    _handleResize() {
+        // If the window resized then our screen element might have
+        // as well. Update the viewport dimensions.
+        window.requestAnimationFrame(() => {
+            this._updateClip();
+            this._updateScale();
+        });
+
+        if (this._resizeSession) {
+            // Request changing the resolution of the remote display to
+            // the size of the local browser viewport.
+
+            // In order to not send multiple requests before the browser-resize
+            // is finished we wait 0.5 seconds before sending the request.
+            clearTimeout(this._resizeTimeout);
+            this._resizeTimeout = setTimeout(this._requestRemoteResize.bind(this), 500);
+        }
+    }
+
+    // Update state of clipping in Display object, and make sure the
+    // configured viewport matches the current screen size
+    _updateClip() {
+        const curClip = this._display.clipViewport;
+        let newClip = this._clipViewport;
+
+        if (this._scaleViewport) {
+            // Disable viewport clipping if we are scaling
+            newClip = false;
+        }
+
+        if (curClip !== newClip) {
+            this._display.clipViewport = newClip;
+        }
+
+        if (newClip) {
+            // When clipping is enabled, the screen is limited to
+            // the size of the container.
+            const size = this._screenSize();
+            this._display.viewportChangeSize(size.w, size.h);
+            this._fixScrollbars();
+        }
+    }
+
+    _updateScale() {
+        if (!this._scaleViewport) {
+            this._display.scale = 1.0;
+        } else {
+            const size = this._screenSize();
+            this._display.autoscale(size.w, size.h);
+        }
+        this._fixScrollbars();
+    }
+
+    // Requests a change of remote desktop size. This message is an extension
+    // and may only be sent if we have received an ExtendedDesktopSize message
+    _requestRemoteResize() {
+        clearTimeout(this._resizeTimeout);
+        this._resizeTimeout = null;
+
+        if (!this._resizeSession || this._viewOnly ||
+            !this._supportsSetDesktopSize) {
+            return;
+        }
+
+        const size = this._screenSize();
+        RFB.messages.setDesktopSize(this._sock,
+                                    Math.floor(size.w), Math.floor(size.h),
+                                    this._screenID, this._screenFlags);
+
+        Log.Debug('Requested new desktop size: ' +
+                   size.w + 'x' + size.h);
+    }
+
+    // Gets the the size of the available screen
+    _screenSize() {
+        let r = this._screen.getBoundingClientRect();
+        return { w: r.width, h: r.height };
+    }
+
+    _fixScrollbars() {
+        // This is a hack because Chrome screws up the calculation
+        // for when scrollbars are needed. So to fix it we temporarily
+        // toggle them off and on.
+        const orig = this._screen.style.overflow;
+        this._screen.style.overflow = 'hidden';
+        // Force Chrome to recalculate the layout by asking for
+        // an element's dimensions
+        this._screen.getBoundingClientRect();
+        this._screen.style.overflow = orig;
+    }
+
+    /*
+     * Connection states:
+     *   connecting
+     *   connected
+     *   disconnecting
+     *   disconnected - permanent state
+     */
+    _updateConnectionState(state) {
+        const oldstate = this._rfbConnectionState;
+
+        if (state === oldstate) {
+            Log.Debug("Already in state '" + state + "', ignoring");
+            return;
+        }
+
+        // The 'disconnected' state is permanent for each RFB object
+        if (oldstate === 'disconnected') {
+            Log.Error("Tried changing state of a disconnected RFB object");
+            return;
+        }
+
+        // Ensure proper transitions before doing anything
+        switch (state) {
+            case 'connected':
+                if (oldstate !== 'connecting') {
+                    Log.Error("Bad transition to connected state, " +
+                               "previous connection state: " + oldstate);
+                    return;
+                }
+                break;
+
+            case 'disconnected':
+                if (oldstate !== 'disconnecting') {
+                    Log.Error("Bad transition to disconnected state, " +
+                               "previous connection state: " + oldstate);
+                    return;
+                }
+                break;
+
+            case 'connecting':
+                if (oldstate !== '') {
+                    Log.Error("Bad transition to connecting state, " +
+                               "previous connection state: " + oldstate);
+                    return;
+                }
+                break;
+
+            case 'disconnecting':
+                if (oldstate !== 'connected' && oldstate !== 'connecting') {
+                    Log.Error("Bad transition to disconnecting state, " +
+                               "previous connection state: " + oldstate);
+                    return;
+                }
+                break;
+
+            default:
+                Log.Error("Unknown connection state: " + state);
+                return;
+        }
+
+        // State change actions
+
+        this._rfbConnectionState = state;
+
+        Log.Debug("New state '" + state + "', was '" + oldstate + "'.");
+
+        if (this._disconnTimer && state !== 'disconnecting') {
+            Log.Debug("Clearing disconnect timer");
+            clearTimeout(this._disconnTimer);
+            this._disconnTimer = null;
+
+            // make sure we don't get a double event
+            this._sock.off('close');
+        }
+
+        switch (state) {
+            case 'connecting':
+                this._connect();
+                break;
+
+            case 'connected':
+                this.dispatchEvent(new CustomEvent("connect", { detail: {} }));
+                break;
+
+            case 'disconnecting':
+                this._disconnect();
+
+                this._disconnTimer = setTimeout(() => {
+                    Log.Error("Disconnection timed out.");
+                    this._updateConnectionState('disconnected');
+                }, DISCONNECT_TIMEOUT * 1000);
+                break;
+
+            case 'disconnected':
+                this.dispatchEvent(new CustomEvent(
+                    "disconnect", { detail:
+                                    { clean: this._rfbCleanDisconnect } }));
+                break;
+        }
+    }
+
+    /* Print errors and disconnect
+     *
+     * The parameter 'details' is used for information that
+     * should be logged but not sent to the user interface.
+     */
+    _fail(details) {
+        switch (this._rfbConnectionState) {
+            case 'disconnecting':
+                Log.Error("Failed when disconnecting: " + details);
+                break;
+            case 'connected':
+                Log.Error("Failed while connected: " + details);
+                break;
+            case 'connecting':
+                Log.Error("Failed when connecting: " + details);
+                break;
+            default:
+                Log.Error("RFB failure: " + details);
+                break;
+        }
+        this._rfbCleanDisconnect = false; //This is sent to the UI
+
+        // Transition to disconnected without waiting for socket to close
+        this._updateConnectionState('disconnecting');
+        this._updateConnectionState('disconnected');
+
+        return false;
+    }
+
+    _setCapability(cap, val) {
+        this._capabilities[cap] = val;
+        this.dispatchEvent(new CustomEvent("capabilities",
+                                           { detail: { capabilities: this._capabilities } }));
+    }
+
+    _handleMessage() {
+        if (this._sock.rQlen === 0) {
+            Log.Warn("handleMessage called on an empty receive queue");
+            return;
+        }
+
+        switch (this._rfbConnectionState) {
+            case 'disconnected':
+                Log.Error("Got data while disconnected");
+                break;
+            case 'connected':
+                while (true) {
+                    if (this._flushing) {
+                        break;
+                    }
+                    if (!this._normalMsg()) {
+                        break;
+                    }
+                    if (this._sock.rQlen === 0) {
+                        break;
+                    }
+                }
+                break;
+            default:
+                this._initMsg();
+                break;
+        }
+    }
+
+    _handleKeyEvent(keysym, code, down) {
+        this.sendKey(keysym, code, down);
+    }
+
+    _handleMouse(ev) {
+        /*
+         * We don't check connection status or viewOnly here as the
+         * mouse events might be used to control the viewport
+         */
+
+        if (ev.type === 'click') {
+            /*
+             * Note: This is only needed for the 'click' event as it fails
+             *       to fire properly for the target element so we have
+             *       to listen on the document element instead.
+             */
+            if (ev.target !== this._canvas) {
+                return;
+            }
+        }
+
+        // FIXME: if we're in view-only and not dragging,
+        //        should we stop events?
+        ev.stopPropagation();
+        ev.preventDefault();
+
+        if ((ev.type === 'click') || (ev.type === 'contextmenu')) {
+            return;
+        }
+
+        let pos = clientToElement(ev.clientX, ev.clientY,
+                                  this._canvas);
+
+        switch (ev.type) {
+            case 'mousedown':
+                setCapture(this._canvas);
+                this._handleMouseButton(pos.x, pos.y,
+                                        true, 1 << ev.button);
+                break;
+            case 'mouseup':
+                this._handleMouseButton(pos.x, pos.y,
+                                        false, 1 << ev.button);
+                break;
+            case 'mousemove':
+                this._handleMouseMove(pos.x, pos.y);
+                break;
+        }
+    }
+
+    _handleMouseButton(x, y, down, bmask) {
+        if (this.dragViewport) {
+            if (down && !this._viewportDragging) {
+                this._viewportDragging = true;
+                this._viewportDragPos = {'x': x, 'y': y};
+                this._viewportHasMoved = false;
+
+                // Skip sending mouse events
+                return;
+            } else {
+                this._viewportDragging = false;
+
+                // If we actually performed a drag then we are done
+                // here and should not send any mouse events
+                if (this._viewportHasMoved) {
+                    return;
+                }
+
+                // Otherwise we treat this as a mouse click event.
+                // Send the button down event here, as the button up
+                // event is sent at the end of this function.
+                this._sendMouse(x, y, bmask);
+            }
+        }
+
+        // Flush waiting move event first
+        if (this._mouseMoveTimer !== null) {
+            clearTimeout(this._mouseMoveTimer);
+            this._mouseMoveTimer = null;
+            this._sendMouse(x, y, this._mouseButtonMask);
+        }
+
+        if (down) {
+            this._mouseButtonMask |= bmask;
+        } else {
+            this._mouseButtonMask &= ~bmask;
+        }
+
+        this._sendMouse(x, y, this._mouseButtonMask);
+    }
+
+    _handleMouseMove(x, y) {
+        if (this._viewportDragging) {
+            const deltaX = this._viewportDragPos.x - x;
+            const deltaY = this._viewportDragPos.y - y;
+
+            if (this._viewportHasMoved || (Math.abs(deltaX) > dragThreshold ||
+                                           Math.abs(deltaY) > dragThreshold)) {
+                this._viewportHasMoved = true;
+
+                this._viewportDragPos = {'x': x, 'y': y};
+                this._display.viewportChangePos(deltaX, deltaY);
+            }
+
+            // Skip sending mouse events
+            return;
+        }
+
+        this._mousePos = { 'x': x, 'y': y };
+
+        // Limit many mouse move events to one every MOUSE_MOVE_DELAY ms
+        if (this._mouseMoveTimer == null) {
+
+            const timeSinceLastMove = Date.now() - this._mouseLastMoveTime;
+            if (timeSinceLastMove > MOUSE_MOVE_DELAY) {
+                this._sendMouse(x, y, this._mouseButtonMask);
+                this._mouseLastMoveTime = Date.now();
+            } else {
+                // Too soon since the latest move, wait the remaining time
+                this._mouseMoveTimer = setTimeout(() => {
+                    this._handleDelayedMouseMove();
+                }, MOUSE_MOVE_DELAY - timeSinceLastMove);
+            }
+        }
+    }
+
+    _handleDelayedMouseMove() {
+        this._mouseMoveTimer = null;
+        this._sendMouse(this._mousePos.x, this._mousePos.y,
+                        this._mouseButtonMask);
+        this._mouseLastMoveTime = Date.now();
+    }
+
+    _sendMouse(x, y, mask) {
+        if (this._rfbConnectionState !== 'connected') { return; }
+        if (this._viewOnly) { return; } // View only, skip mouse events
+
+        RFB.messages.pointerEvent(this._sock, this._display.absX(x),
+                                  this._display.absY(y), mask);
+    }
+
+    _handleWheel(ev) {
+        if (this._rfbConnectionState !== 'connected') { return; }
+        if (this._viewOnly) { return; } // View only, skip mouse events
+
+        ev.stopPropagation();
+        ev.preventDefault();
+
+        let pos = clientToElement(ev.clientX, ev.clientY,
+                                  this._canvas);
+
+        let dX = ev.deltaX;
+        let dY = ev.deltaY;
+
+        // Pixel units unless it's non-zero.
+        // Note that if deltamode is line or page won't matter since we aren't
+        // sending the mouse wheel delta to the server anyway.
+        // The difference between pixel and line can be important however since
+        // we have a threshold that can be smaller than the line height.
+        if (ev.deltaMode !== 0) {
+            dX *= WHEEL_LINE_HEIGHT;
+            dY *= WHEEL_LINE_HEIGHT;
+        }
+
+        // Mouse wheel events are sent in steps over VNC. This means that the VNC
+        // protocol can't handle a wheel event with specific distance or speed.
+        // Therefor, if we get a lot of small mouse wheel events we combine them.
+        this._accumulatedWheelDeltaX += dX;
+        this._accumulatedWheelDeltaY += dY;
+
+        // Generate a mouse wheel step event when the accumulated delta
+        // for one of the axes is large enough.
+        if (Math.abs(this._accumulatedWheelDeltaX) >= WHEEL_STEP) {
+            if (this._accumulatedWheelDeltaX < 0) {
+                this._handleMouseButton(pos.x, pos.y, true, 1 << 5);
+                this._handleMouseButton(pos.x, pos.y, false, 1 << 5);
+            } else if (this._accumulatedWheelDeltaX > 0) {
+                this._handleMouseButton(pos.x, pos.y, true, 1 << 6);
+                this._handleMouseButton(pos.x, pos.y, false, 1 << 6);
+            }
+
+            this._accumulatedWheelDeltaX = 0;
+        }
+        if (Math.abs(this._accumulatedWheelDeltaY) >= WHEEL_STEP) {
+            if (this._accumulatedWheelDeltaY < 0) {
+                this._handleMouseButton(pos.x, pos.y, true, 1 << 3);
+                this._handleMouseButton(pos.x, pos.y, false, 1 << 3);
+            } else if (this._accumulatedWheelDeltaY > 0) {
+                this._handleMouseButton(pos.x, pos.y, true, 1 << 4);
+                this._handleMouseButton(pos.x, pos.y, false, 1 << 4);
+            }
+
+            this._accumulatedWheelDeltaY = 0;
+        }
+    }
+
+    _fakeMouseMove(ev, elementX, elementY) {
+        this._handleMouseMove(elementX, elementY);
+        this._cursor.move(ev.detail.clientX, ev.detail.clientY);
+    }
+
+    _handleTapEvent(ev, bmask) {
+        let pos = clientToElement(ev.detail.clientX, ev.detail.clientY,
+                                  this._canvas);
+
+        // If the user quickly taps multiple times we assume they meant to
+        // hit the same spot, so slightly adjust coordinates
+
+        if ((this._gestureLastTapTime !== null) &&
+            ((Date.now() - this._gestureLastTapTime) < DOUBLE_TAP_TIMEOUT) &&
+            (this._gestureFirstDoubleTapEv.detail.type === ev.detail.type)) {
+            let dx = this._gestureFirstDoubleTapEv.detail.clientX - ev.detail.clientX;
+            let dy = this._gestureFirstDoubleTapEv.detail.clientY - ev.detail.clientY;
+            let distance = Math.hypot(dx, dy);
+
+            if (distance < DOUBLE_TAP_THRESHOLD) {
+                pos = clientToElement(this._gestureFirstDoubleTapEv.detail.clientX,
+                                      this._gestureFirstDoubleTapEv.detail.clientY,
+                                      this._canvas);
+            } else {
+                this._gestureFirstDoubleTapEv = ev;
+            }
+        } else {
+            this._gestureFirstDoubleTapEv = ev;
+        }
+        this._gestureLastTapTime = Date.now();
+
+        this._fakeMouseMove(this._gestureFirstDoubleTapEv, pos.x, pos.y);
+        this._handleMouseButton(pos.x, pos.y, true, bmask);
+        this._handleMouseButton(pos.x, pos.y, false, bmask);
+    }
+
+    _handleGesture(ev) {
+        let magnitude;
+
+        let pos = clientToElement(ev.detail.clientX, ev.detail.clientY,
+                                  this._canvas);
+        switch (ev.type) {
+            case 'gesturestart':
+                switch (ev.detail.type) {
+                    case 'onetap':
+                        this._handleTapEvent(ev, 0x1);
+                        break;
+                    case 'twotap':
+                        this._handleTapEvent(ev, 0x4);
+                        break;
+                    case 'threetap':
+                        this._handleTapEvent(ev, 0x2);
+                        break;
+                    case 'drag':
+                        this._fakeMouseMove(ev, pos.x, pos.y);
+                        this._handleMouseButton(pos.x, pos.y, true, 0x1);
+                        break;
+                    case 'longpress':
+                        this._fakeMouseMove(ev, pos.x, pos.y);
+                        this._handleMouseButton(pos.x, pos.y, true, 0x4);
+                        break;
+
+                    case 'twodrag':
+                        this._gestureLastMagnitudeX = ev.detail.magnitudeX;
+                        this._gestureLastMagnitudeY = ev.detail.magnitudeY;
+                        this._fakeMouseMove(ev, pos.x, pos.y);
+                        break;
+                    case 'pinch':
+                        this._gestureLastMagnitudeX = Math.hypot(ev.detail.magnitudeX,
+                                                                 ev.detail.magnitudeY);
+                        this._fakeMouseMove(ev, pos.x, pos.y);
+                        break;
+                }
+                break;
+
+            case 'gesturemove':
+                switch (ev.detail.type) {
+                    case 'onetap':
+                    case 'twotap':
+                    case 'threetap':
+                        break;
+                    case 'drag':
+                    case 'longpress':
+                        this._fakeMouseMove(ev, pos.x, pos.y);
+                        break;
+                    case 'twodrag':
+                        // Always scroll in the same position.
+                        // We don't know if the mouse was moved so we need to move it
+                        // every update.
+                        this._fakeMouseMove(ev, pos.x, pos.y);
+                        while ((ev.detail.magnitudeY - this._gestureLastMagnitudeY) > GESTURE_SCRLSENS) {
+                            this._handleMouseButton(pos.x, pos.y, true, 0x8);
+                            this._handleMouseButton(pos.x, pos.y, false, 0x8);
+                            this._gestureLastMagnitudeY += GESTURE_SCRLSENS;
+                        }
+                        while ((ev.detail.magnitudeY - this._gestureLastMagnitudeY) < -GESTURE_SCRLSENS) {
+                            this._handleMouseButton(pos.x, pos.y, true, 0x10);
+                            this._handleMouseButton(pos.x, pos.y, false, 0x10);
+                            this._gestureLastMagnitudeY -= GESTURE_SCRLSENS;
+                        }
+                        while ((ev.detail.magnitudeX - this._gestureLastMagnitudeX) > GESTURE_SCRLSENS) {
+                            this._handleMouseButton(pos.x, pos.y, true, 0x20);
+                            this._handleMouseButton(pos.x, pos.y, false, 0x20);
+                            this._gestureLastMagnitudeX += GESTURE_SCRLSENS;
+                        }
+                        while ((ev.detail.magnitudeX - this._gestureLastMagnitudeX) < -GESTURE_SCRLSENS) {
+                            this._handleMouseButton(pos.x, pos.y, true, 0x40);
+                            this._handleMouseButton(pos.x, pos.y, false, 0x40);
+                            this._gestureLastMagnitudeX -= GESTURE_SCRLSENS;
+                        }
+                        break;
+                    case 'pinch':
+                        // Always scroll in the same position.
+                        // We don't know if the mouse was moved so we need to move it
+                        // every update.
+                        this._fakeMouseMove(ev, pos.x, pos.y);
+                        magnitude = Math.hypot(ev.detail.magnitudeX, ev.detail.magnitudeY);
+                        if (Math.abs(magnitude - this._gestureLastMagnitudeX) > GESTURE_ZOOMSENS) {
+                            this._handleKeyEvent(KeyTable.XK_Control_L, "ControlLeft", true);
+                            while ((magnitude - this._gestureLastMagnitudeX) > GESTURE_ZOOMSENS) {
+                                this._handleMouseButton(pos.x, pos.y, true, 0x8);
+                                this._handleMouseButton(pos.x, pos.y, false, 0x8);
+                                this._gestureLastMagnitudeX += GESTURE_ZOOMSENS;
+                            }
+                            while ((magnitude -  this._gestureLastMagnitudeX) < -GESTURE_ZOOMSENS) {
+                                this._handleMouseButton(pos.x, pos.y, true, 0x10);
+                                this._handleMouseButton(pos.x, pos.y, false, 0x10);
+                                this._gestureLastMagnitudeX -= GESTURE_ZOOMSENS;
+                            }
+                        }
+                        this._handleKeyEvent(KeyTable.XK_Control_L, "ControlLeft", false);
+                        break;
+                }
+                break;
+
+            case 'gestureend':
+                switch (ev.detail.type) {
+                    case 'onetap':
+                    case 'twotap':
+                    case 'threetap':
+                    case 'pinch':
+                    case 'twodrag':
+                        break;
+                    case 'drag':
+                        this._fakeMouseMove(ev, pos.x, pos.y);
+                        this._handleMouseButton(pos.x, pos.y, false, 0x1);
+                        break;
+                    case 'longpress':
+                        this._fakeMouseMove(ev, pos.x, pos.y);
+                        this._handleMouseButton(pos.x, pos.y, false, 0x4);
+                        break;
+                }
+                break;
+        }
+    }
+
+    // Message Handlers
+
+    _negotiateProtocolVersion() {
+        if (this._sock.rQwait("version", 12)) {
+            return false;
+        }
+
+        const sversion = this._sock.rQshiftStr(12).substr(4, 7);
+        Log.Info("Server ProtocolVersion: " + sversion);
+        let isRepeater = 0;
+        switch (sversion) {
+            case "000.000":  // UltraVNC repeater
+                isRepeater = 1;
+                break;
+            case "003.003":
+            case "003.006":  // UltraVNC
+            case "003.889":  // Apple Remote Desktop
+                this._rfbVersion = 3.3;
+                break;
+            case "003.007":
+                this._rfbVersion = 3.7;
+                break;
+            case "003.008":
+            case "004.000":  // Intel AMT KVM
+            case "004.001":  // RealVNC 4.6
+            case "005.000":  // RealVNC 5.3
+                this._rfbVersion = 3.8;
+                break;
+            default:
+                return this._fail("Invalid server version " + sversion);
+        }
+
+        if (isRepeater) {
+            let repeaterID = "ID:" + this._repeaterID;
+            while (repeaterID.length < 250) {
+                repeaterID += "\0";
+            }
+            this._sock.sendString(repeaterID);
+            return true;
+        }
+
+        if (this._rfbVersion > this._rfbMaxVersion) {
+            this._rfbVersion = this._rfbMaxVersion;
+        }
+
+        const cversion = "00" + parseInt(this._rfbVersion, 10) +
+                       ".00" + ((this._rfbVersion * 10) % 10);
+        this._sock.sendString("RFB " + cversion + "\n");
+        Log.Debug('Sent ProtocolVersion: ' + cversion);
+
+        this._rfbInitState = 'Security';
+    }
+
+    _negotiateSecurity() {
+        if (this._rfbVersion >= 3.7) {
+            // Server sends supported list, client decides
+            const numTypes = this._sock.rQshift8();
+            if (this._sock.rQwait("security type", numTypes, 1)) { return false; }
+
+            if (numTypes === 0) {
+                this._rfbInitState = "SecurityReason";
+                this._securityContext = "no security types";
+                this._securityStatus = 1;
+                return this._initMsg();
+            }
+
+            const types = this._sock.rQshiftBytes(numTypes);
+            Log.Debug("Server security types: " + types);
+
+            // Look for each auth in preferred order
+            if (types.includes(1)) {
+                this._rfbAuthScheme = 1; // None
+            } else if (types.includes(22)) {
+                this._rfbAuthScheme = 22; // XVP
+            } else if (types.includes(16)) {
+                this._rfbAuthScheme = 16; // Tight
+            } else if (types.includes(2)) {
+                this._rfbAuthScheme = 2; // VNC Auth
+            } else if (types.includes(19)) {
+                this._rfbAuthScheme = 19; // VeNCrypt Auth
+            } else {
+                return this._fail("Unsupported security types (types: " + types + ")");
+            }
+
+            this._sock.send([this._rfbAuthScheme]);
+        } else {
+            // Server decides
+            if (this._sock.rQwait("security scheme", 4)) { return false; }
+            this._rfbAuthScheme = this._sock.rQshift32();
+
+            if (this._rfbAuthScheme == 0) {
+                this._rfbInitState = "SecurityReason";
+                this._securityContext = "authentication scheme";
+                this._securityStatus = 1;
+                return this._initMsg();
+            }
+        }
+
+        this._rfbInitState = 'Authentication';
+        Log.Debug('Authenticating using scheme: ' + this._rfbAuthScheme);
+
+        return this._initMsg(); // jump to authentication
+    }
+
+    _handleSecurityReason() {
+        if (this._sock.rQwait("reason length", 4)) {
+            return false;
+        }
+        const strlen = this._sock.rQshift32();
+        let reason = "";
+
+        if (strlen > 0) {
+            if (this._sock.rQwait("reason", strlen, 4)) { return false; }
+            reason = this._sock.rQshiftStr(strlen);
+        }
+
+        if (reason !== "") {
+            this.dispatchEvent(new CustomEvent(
+                "securityfailure",
+                { detail: { status: this._securityStatus,
+                            reason: reason } }));
+
+            return this._fail("Security negotiation failed on " +
+                              this._securityContext +
+                              " (reason: " + reason + ")");
+        } else {
+            this.dispatchEvent(new CustomEvent(
+                "securityfailure",
+                { detail: { status: this._securityStatus } }));
+
+            return this._fail("Security negotiation failed on " +
+                              this._securityContext);
+        }
+    }
+
+    // authentication
+    _negotiateXvpAuth() {
+        if (this._rfbCredentials.username === undefined ||
+            this._rfbCredentials.password === undefined ||
+            this._rfbCredentials.target === undefined) {
+            this.dispatchEvent(new CustomEvent(
+                "credentialsrequired",
+                { detail: { types: ["username", "password", "target"] } }));
+            return false;
+        }
+
+        const xvpAuthStr = String.fromCharCode(this._rfbCredentials.username.length) +
+                           String.fromCharCode(this._rfbCredentials.target.length) +
+                           this._rfbCredentials.username +
+                           this._rfbCredentials.target;
+        this._sock.sendString(xvpAuthStr);
+        this._rfbAuthScheme = 2;
+        return this._negotiateAuthentication();
+    }
+
+    // VeNCrypt authentication, currently only supports version 0.2 and only Plain subtype
+    _negotiateVeNCryptAuth() {
+
+        // waiting for VeNCrypt version
+        if (this._rfbVeNCryptState == 0) {
+            if (this._sock.rQwait("vencrypt version", 2)) { return false; }
+
+            const major = this._sock.rQshift8();
+            const minor = this._sock.rQshift8();
+
+            if (!(major == 0 && minor == 2)) {
+                return this._fail("Unsupported VeNCrypt version " + major + "." + minor);
+            }
+
+            this._sock.send([0, 2]);
+            this._rfbVeNCryptState = 1;
+        }
+
+        // waiting for ACK
+        if (this._rfbVeNCryptState == 1) {
+            if (this._sock.rQwait("vencrypt ack", 1)) { return false; }
+
+            const res = this._sock.rQshift8();
+
+            if (res != 0) {
+                return this._fail("VeNCrypt failure " + res);
+            }
+
+            this._rfbVeNCryptState = 2;
+        }
+        // must fall through here (i.e. no "else if"), beacause we may have already received
+        // the subtypes length and won't be called again
+
+        if (this._rfbVeNCryptState == 2) { // waiting for subtypes length
+            if (this._sock.rQwait("vencrypt subtypes length", 1)) { return false; }
+
+            const subtypesLength = this._sock.rQshift8();
+            if (subtypesLength < 1) {
+                return this._fail("VeNCrypt subtypes empty");
+            }
+
+            this._rfbVeNCryptSubtypesLength = subtypesLength;
+            this._rfbVeNCryptState = 3;
+        }
+
+        // waiting for subtypes list
+        if (this._rfbVeNCryptState == 3) {
+            if (this._sock.rQwait("vencrypt subtypes", 4 * this._rfbVeNCryptSubtypesLength)) { return false; }
+
+            const subtypes = [];
+            for (let i = 0; i < this._rfbVeNCryptSubtypesLength; i++) {
+                subtypes.push(this._sock.rQshift32());
+            }
+
+            // 256 = Plain subtype
+            if (subtypes.indexOf(256) != -1) {
+                // 0x100 = 256
+                this._sock.send([0, 0, 1, 0]);
+                this._rfbVeNCryptState = 4;
+            } else {
+                return this._fail("VeNCrypt Plain subtype not offered by server");
+            }
+        }
+
+        // negotiated Plain subtype, server waits for password
+        if (this._rfbVeNCryptState == 4) {
+            if (this._rfbCredentials.username === undefined ||
+                this._rfbCredentials.password === undefined) {
+                this.dispatchEvent(new CustomEvent(
+                    "credentialsrequired",
+                    { detail: { types: ["username", "password"] } }));
+                return false;
+            }
+
+            const user = encodeUTF8(this._rfbCredentials.username);
+            const pass = encodeUTF8(this._rfbCredentials.password);
+
+            this._sock.send([
+                (user.length >> 24) & 0xFF,
+                (user.length >> 16) & 0xFF,
+                (user.length >> 8) & 0xFF,
+                user.length & 0xFF
+            ]);
+            this._sock.send([
+                (pass.length >> 24) & 0xFF,
+                (pass.length >> 16) & 0xFF,
+                (pass.length >> 8) & 0xFF,
+                pass.length & 0xFF
+            ]);
+            this._sock.sendString(user);
+            this._sock.sendString(pass);
+
+            this._rfbInitState = "SecurityResult";
+            return true;
+        }
+    }
+
+    _negotiateStdVNCAuth() {
+        if (this._sock.rQwait("auth challenge", 16)) { return false; }
+
+        if (this._rfbCredentials.password === undefined) {
+            this.dispatchEvent(new CustomEvent(
+                "credentialsrequired",
+                { detail: { types: ["password"] } }));
+            return false;
+        }
+
+        // TODO(directxman12): make genDES not require an Array
+        const challenge = Array.prototype.slice.call(this._sock.rQshiftBytes(16));
+        const response = RFB.genDES(this._rfbCredentials.password, challenge);
+        this._sock.send(response);
+        this._rfbInitState = "SecurityResult";
+        return true;
+    }
+
+    _negotiateTightUnixAuth() {
+        if (this._rfbCredentials.username === undefined ||
+            this._rfbCredentials.password === undefined) {
+            this.dispatchEvent(new CustomEvent(
+                "credentialsrequired",
+                { detail: { types: ["username", "password"] } }));
+            return false;
+        }
+
+        this._sock.send([0, 0, 0, this._rfbCredentials.username.length]);
+        this._sock.send([0, 0, 0, this._rfbCredentials.password.length]);
+        this._sock.sendString(this._rfbCredentials.username);
+        this._sock.sendString(this._rfbCredentials.password);
+        this._rfbInitState = "SecurityResult";
+        return true;
+    }
+
+    _negotiateTightTunnels(numTunnels) {
+        const clientSupportedTunnelTypes = {
+            0: { vendor: 'TGHT', signature: 'NOTUNNEL' }
+        };
+        const serverSupportedTunnelTypes = {};
+        // receive tunnel capabilities
+        for (let i = 0; i < numTunnels; i++) {
+            const capCode = this._sock.rQshift32();
+            const capVendor = this._sock.rQshiftStr(4);
+            const capSignature = this._sock.rQshiftStr(8);
+            serverSupportedTunnelTypes[capCode] = { vendor: capVendor, signature: capSignature };
+        }
+
+        Log.Debug("Server Tight tunnel types: " + serverSupportedTunnelTypes);
+
+        // Siemens touch panels have a VNC server that supports NOTUNNEL,
+        // but forgets to advertise it. Try to detect such servers by
+        // looking for their custom tunnel type.
+        if (serverSupportedTunnelTypes[1] &&
+            (serverSupportedTunnelTypes[1].vendor === "SICR") &&
+            (serverSupportedTunnelTypes[1].signature === "SCHANNEL")) {
+            Log.Debug("Detected Siemens server. Assuming NOTUNNEL support.");
+            serverSupportedTunnelTypes[0] = { vendor: 'TGHT', signature: 'NOTUNNEL' };
+        }
+
+        // choose the notunnel type
+        if (serverSupportedTunnelTypes[0]) {
+            if (serverSupportedTunnelTypes[0].vendor != clientSupportedTunnelTypes[0].vendor ||
+                serverSupportedTunnelTypes[0].signature != clientSupportedTunnelTypes[0].signature) {
+                return this._fail("Client's tunnel type had the incorrect " +
+                                  "vendor or signature");
+            }
+            Log.Debug("Selected tunnel type: " + clientSupportedTunnelTypes[0]);
+            this._sock.send([0, 0, 0, 0]);  // use NOTUNNEL
+            return false; // wait until we receive the sub auth count to continue
+        } else {
+            return this._fail("Server wanted tunnels, but doesn't support " +
+                              "the notunnel type");
+        }
+    }
+
+    _negotiateTightAuth() {
+        if (!this._rfbTightVNC) {  // first pass, do the tunnel negotiation
+            if (this._sock.rQwait("num tunnels", 4)) { return false; }
+            const numTunnels = this._sock.rQshift32();
+            if (numTunnels > 0 && this._sock.rQwait("tunnel capabilities", 16 * numTunnels, 4)) { return false; }
+
+            this._rfbTightVNC = true;
+
+            if (numTunnels > 0) {
+                this._negotiateTightTunnels(numTunnels);
+                return false;  // wait until we receive the sub auth to continue
+            }
+        }
+
+        // second pass, do the sub-auth negotiation
+        if (this._sock.rQwait("sub auth count", 4)) { return false; }
+        const subAuthCount = this._sock.rQshift32();
+        if (subAuthCount === 0) {  // empty sub-auth list received means 'no auth' subtype selected
+            this._rfbInitState = 'SecurityResult';
+            return true;
+        }
+
+        if (this._sock.rQwait("sub auth capabilities", 16 * subAuthCount, 4)) { return false; }
+
+        const clientSupportedTypes = {
+            'STDVNOAUTH__': 1,
+            'STDVVNCAUTH_': 2,
+            'TGHTULGNAUTH': 129
+        };
+
+        const serverSupportedTypes = [];
+
+        for (let i = 0; i < subAuthCount; i++) {
+            this._sock.rQshift32(); // capNum
+            const capabilities = this._sock.rQshiftStr(12);
+            serverSupportedTypes.push(capabilities);
+        }
+
+        Log.Debug("Server Tight authentication types: " + serverSupportedTypes);
+
+        for (let authType in clientSupportedTypes) {
+            if (serverSupportedTypes.indexOf(authType) != -1) {
+                this._sock.send([0, 0, 0, clientSupportedTypes[authType]]);
+                Log.Debug("Selected authentication type: " + authType);
+
+                switch (authType) {
+                    case 'STDVNOAUTH__':  // no auth
+                        this._rfbInitState = 'SecurityResult';
+                        return true;
+                    case 'STDVVNCAUTH_': // VNC auth
+                        this._rfbAuthScheme = 2;
+                        return this._initMsg();
+                    case 'TGHTULGNAUTH': // UNIX auth
+                        this._rfbAuthScheme = 129;
+                        return this._initMsg();
+                    default:
+                        return this._fail("Unsupported tiny auth scheme " +
+                                          "(scheme: " + authType + ")");
+                }
+            }
+        }
+
+        return this._fail("No supported sub-auth types!");
+    }
+
+    _negotiateAuthentication() {
+        switch (this._rfbAuthScheme) {
+            case 1:  // no auth
+                if (this._rfbVersion >= 3.8) {
+                    this._rfbInitState = 'SecurityResult';
+                    return true;
+                }
+                this._rfbInitState = 'ClientInitialisation';
+                return this._initMsg();
+
+            case 22:  // XVP auth
+                return this._negotiateXvpAuth();
+
+            case 2:  // VNC authentication
+                return this._negotiateStdVNCAuth();
+
+            case 16:  // TightVNC Security Type
+                return this._negotiateTightAuth();
+
+            case 19:  // VeNCrypt Security Type
+                return this._negotiateVeNCryptAuth();
+
+            case 129:  // TightVNC UNIX Security Type
+                return this._negotiateTightUnixAuth();
+
+            default:
+                return this._fail("Unsupported auth scheme (scheme: " +
+                                  this._rfbAuthScheme + ")");
+        }
+    }
+
+    _handleSecurityResult() {
+        if (this._sock.rQwait('VNC auth response ', 4)) { return false; }
+
+        const status = this._sock.rQshift32();
+
+        if (status === 0) { // OK
+            this._rfbInitState = 'ClientInitialisation';
+            Log.Debug('Authentication OK');
+            return this._initMsg();
+        } else {
+            if (this._rfbVersion >= 3.8) {
+                this._rfbInitState = "SecurityReason";
+                this._securityContext = "security result";
+                this._securityStatus = status;
+                return this._initMsg();
+            } else {
+                this.dispatchEvent(new CustomEvent(
+                    "securityfailure",
+                    { detail: { status: status } }));
+
+                return this._fail("Security handshake failed");
+            }
+        }
+    }
+
+    _negotiateServerInit() {
+        if (this._sock.rQwait("server initialization", 24)) { return false; }
+
+        /* Screen size */
+        const width = this._sock.rQshift16();
+        const height = this._sock.rQshift16();
+
+        /* PIXEL_FORMAT */
+        const bpp         = this._sock.rQshift8();
+        const depth       = this._sock.rQshift8();
+        const bigEndian  = this._sock.rQshift8();
+        const trueColor  = this._sock.rQshift8();
+
+        const redMax     = this._sock.rQshift16();
+        const greenMax   = this._sock.rQshift16();
+        const blueMax    = this._sock.rQshift16();
+        const redShift   = this._sock.rQshift8();
+        const greenShift = this._sock.rQshift8();
+        const blueShift  = this._sock.rQshift8();
+        this._sock.rQskipBytes(3);  // padding
+
+        // NB(directxman12): we don't want to call any callbacks or print messages until
+        //                   *after* we're past the point where we could backtrack
+
+        /* Connection name/title */
+        const nameLength = this._sock.rQshift32();
+        if (this._sock.rQwait('server init name', nameLength, 24)) { return false; }
+        let name = this._sock.rQshiftStr(nameLength);
+        name = decodeUTF8(name, true);
+
+        if (this._rfbTightVNC) {
+            if (this._sock.rQwait('TightVNC extended server init header', 8, 24 + nameLength)) { return false; }
+            // In TightVNC mode, ServerInit message is extended
+            const numServerMessages = this._sock.rQshift16();
+            const numClientMessages = this._sock.rQshift16();
+            const numEncodings = this._sock.rQshift16();
+            this._sock.rQskipBytes(2);  // padding
+
+            const totalMessagesLength = (numServerMessages + numClientMessages + numEncodings) * 16;
+            if (this._sock.rQwait('TightVNC extended server init header', totalMessagesLength, 32 + nameLength)) { return false; }
+
+            // we don't actually do anything with the capability information that TIGHT sends,
+            // so we just skip the all of this.
+
+            // TIGHT server message capabilities
+            this._sock.rQskipBytes(16 * numServerMessages);
+
+            // TIGHT client message capabilities
+            this._sock.rQskipBytes(16 * numClientMessages);
+
+            // TIGHT encoding capabilities
+            this._sock.rQskipBytes(16 * numEncodings);
+        }
+
+        // NB(directxman12): these are down here so that we don't run them multiple times
+        //                   if we backtrack
+        Log.Info("Screen: " + width + "x" + height +
+                  ", bpp: " + bpp + ", depth: " + depth +
+                  ", bigEndian: " + bigEndian +
+                  ", trueColor: " + trueColor +
+                  ", redMax: " + redMax +
+                  ", greenMax: " + greenMax +
+                  ", blueMax: " + blueMax +
+                  ", redShift: " + redShift +
+                  ", greenShift: " + greenShift +
+                  ", blueShift: " + blueShift);
+
+        // we're past the point where we could backtrack, so it's safe to call this
+        this._setDesktopName(name);
+        this._resize(width, height);
+
+        if (!this._viewOnly) { this._keyboard.grab(); }
+
+        this._fbDepth = 24;
+
+        if (this._fbName === "Intel(r) AMT KVM") {
+            Log.Warn("Intel AMT KVM only supports 8/16 bit depths. Using low color mode.");
+            this._fbDepth = 8;
+        }
+
+        RFB.messages.pixelFormat(this._sock, this._fbDepth, true);
+        this._sendEncodings();
+        RFB.messages.fbUpdateRequest(this._sock, false, 0, 0, this._fbWidth, this._fbHeight);
+
+        this._updateConnectionState('connected');
+        return true;
+    }
+
+    _sendEncodings() {
+        const encs = [];
+
+        // In preference order
+        encs.push(encodings.encodingCopyRect);
+        // Only supported with full depth support
+        if (this._fbDepth == 24) {
+            encs.push(encodings.encodingTight);
+            encs.push(encodings.encodingTightPNG);
+            encs.push(encodings.encodingHextile);
+            encs.push(encodings.encodingRRE);
+        }
+        encs.push(encodings.encodingRaw);
+
+        // Psuedo-encoding settings
+        encs.push(encodings.pseudoEncodingQualityLevel0 + this._qualityLevel);
+        encs.push(encodings.pseudoEncodingCompressLevel0 + this._compressionLevel);
+
+        encs.push(encodings.pseudoEncodingDesktopSize);
+        encs.push(encodings.pseudoEncodingLastRect);
+        encs.push(encodings.pseudoEncodingQEMUExtendedKeyEvent);
+        encs.push(encodings.pseudoEncodingExtendedDesktopSize);
+        encs.push(encodings.pseudoEncodingXvp);
+        encs.push(encodings.pseudoEncodingFence);
+        encs.push(encodings.pseudoEncodingContinuousUpdates);
+        encs.push(encodings.pseudoEncodingDesktopName);
+        encs.push(encodings.pseudoEncodingExtendedClipboard);
+
+        if (this._fbDepth == 24) {
+            encs.push(encodings.pseudoEncodingVMwareCursor);
+            encs.push(encodings.pseudoEncodingCursor);
+        }
+
+        RFB.messages.clientEncodings(this._sock, encs);
+    }
+
+    /* RFB protocol initialization states:
+     *   ProtocolVersion
+     *   Security
+     *   Authentication
+     *   SecurityResult
+     *   ClientInitialization - not triggered by server message
+     *   ServerInitialization
+     */
+    _initMsg() {
+        switch (this._rfbInitState) {
+            case 'ProtocolVersion':
+                return this._negotiateProtocolVersion();
+
+            case 'Security':
+                return this._negotiateSecurity();
+
+            case 'Authentication':
+                return this._negotiateAuthentication();
+
+            case 'SecurityResult':
+                return this._handleSecurityResult();
+
+            case 'SecurityReason':
+                return this._handleSecurityReason();
+
+            case 'ClientInitialisation':
+                this._sock.send([this._shared ? 1 : 0]); // ClientInitialisation
+                this._rfbInitState = 'ServerInitialisation';
+                return true;
+
+            case 'ServerInitialisation':
+                return this._negotiateServerInit();
+
+            default:
+                return this._fail("Unknown init state (state: " +
+                                  this._rfbInitState + ")");
+        }
+    }
+
+    _handleSetColourMapMsg() {
+        Log.Debug("SetColorMapEntries");
+
+        return this._fail("Unexpected SetColorMapEntries message");
+    }
+
+    _handleServerCutText() {
+        Log.Debug("ServerCutText");
+
+        if (this._sock.rQwait("ServerCutText header", 7, 1)) { return false; }
+
+        this._sock.rQskipBytes(3);  // Padding
+
+        let length = this._sock.rQshift32();
+        length = toSigned32bit(length);
+
+        if (this._sock.rQwait("ServerCutText content", Math.abs(length), 8)) { return false; }
+
+        if (length >= 0) {
+            //Standard msg
+            const text = this._sock.rQshiftStr(length);
+            if (this._viewOnly) {
+                return true;
+            }
+
+            this.dispatchEvent(new CustomEvent(
+                "clipboard",
+                { detail: { text: text } }));
+
+        } else {
+            //Extended msg.
+            length = Math.abs(length);
+            const flags = this._sock.rQshift32();
+            let formats = flags & 0x0000FFFF;
+            let actions = flags & 0xFF000000;
+
+            let isCaps = (!!(actions & extendedClipboardActionCaps));
+            if (isCaps) {
+                this._clipboardServerCapabilitiesFormats = {};
+                this._clipboardServerCapabilitiesActions = {};
+
+                // Update our server capabilities for Formats
+                for (let i = 0; i <= 15; i++) {
+                    let index = 1 << i;
+
+                    // Check if format flag is set.
+                    if ((formats & index)) {
+                        this._clipboardServerCapabilitiesFormats[index] = true;
+                        // We don't send unsolicited clipboard, so we
+                        // ignore the size
+                        this._sock.rQshift32();
+                    }
+                }
+
+                // Update our server capabilities for Actions
+                for (let i = 24; i <= 31; i++) {
+                    let index = 1 << i;
+                    this._clipboardServerCapabilitiesActions[index] = !!(actions & index);
+                }
+
+                /*  Caps handling done, send caps with the clients
+                    capabilities set as a response */
+                let clientActions = [
+                    extendedClipboardActionCaps,
+                    extendedClipboardActionRequest,
+                    extendedClipboardActionPeek,
+                    extendedClipboardActionNotify,
+                    extendedClipboardActionProvide
+                ];
+                RFB.messages.extendedClipboardCaps(this._sock, clientActions, {extendedClipboardFormatText: 0});
+
+            } else if (actions === extendedClipboardActionRequest) {
+                if (this._viewOnly) {
+                    return true;
+                }
+
+                // Check if server has told us it can handle Provide and there is clipboard data to send.
+                if (this._clipboardText != null &&
+                    this._clipboardServerCapabilitiesActions[extendedClipboardActionProvide]) {
+
+                    if (formats & extendedClipboardFormatText) {
+                        RFB.messages.extendedClipboardProvide(this._sock, [extendedClipboardFormatText], [this._clipboardText]);
+                    }
+                }
+
+            } else if (actions === extendedClipboardActionPeek) {
+                if (this._viewOnly) {
+                    return true;
+                }
+
+                if (this._clipboardServerCapabilitiesActions[extendedClipboardActionNotify]) {
+
+                    if (this._clipboardText != null) {
+                        RFB.messages.extendedClipboardNotify(this._sock, [extendedClipboardFormatText]);
+                    } else {
+                        RFB.messages.extendedClipboardNotify(this._sock, []);
+                    }
+                }
+
+            } else if (actions === extendedClipboardActionNotify) {
+                if (this._viewOnly) {
+                    return true;
+                }
+
+                if (this._clipboardServerCapabilitiesActions[extendedClipboardActionRequest]) {
+
+                    if (formats & extendedClipboardFormatText) {
+                        RFB.messages.extendedClipboardRequest(this._sock, [extendedClipboardFormatText]);
+                    }
+                }
+
+            } else if (actions === extendedClipboardActionProvide) {
+                if (this._viewOnly) {
+                    return true;
+                }
+
+                if (!(formats & extendedClipboardFormatText)) {
+                    return true;
+                }
+                // Ignore what we had in our clipboard client side.
+                this._clipboardText = null;
+
+                // FIXME: Should probably verify that this data was actually requested
+                let zlibStream = this._sock.rQshiftBytes(length - 4);
+                let streamInflator = new Inflator();
+                let textData = null;
+
+                streamInflator.setInput(zlibStream);
+                for (let i = 0; i <= 15; i++) {
+                    let format = 1 << i;
+
+                    if (formats & format) {
+
+                        let size = 0x00;
+                        let sizeArray = streamInflator.inflate(4);
+
+                        size |= (sizeArray[0] << 24);
+                        size |= (sizeArray[1] << 16);
+                        size |= (sizeArray[2] << 8);
+                        size |= (sizeArray[3]);
+                        let chunk = streamInflator.inflate(size);
+
+                        if (format === extendedClipboardFormatText) {
+                            textData = chunk;
+                        }
+                    }
+                }
+                streamInflator.setInput(null);
+
+                if (textData !== null) {
+                    let tmpText = "";
+                    for (let i = 0; i < textData.length; i++) {
+                        tmpText += String.fromCharCode(textData[i]);
+                    }
+                    textData = tmpText;
+
+                    textData = decodeUTF8(textData);
+                    if ((textData.length > 0) && "\0" === textData.charAt(textData.length - 1)) {
+                        textData = textData.slice(0, -1);
+                    }
+
+                    textData = textData.replace("\r\n", "\n");
+
+                    this.dispatchEvent(new CustomEvent(
+                        "clipboard",
+                        { detail: { text: textData } }));
+                }
+            } else {
+                return this._fail("Unexpected action in extended clipboard message: " + actions);
+            }
+        }
+        return true;
+    }
+
+    _handleServerFenceMsg() {
+        if (this._sock.rQwait("ServerFence header", 8, 1)) { return false; }
+        this._sock.rQskipBytes(3); // Padding
+        let flags = this._sock.rQshift32();
+        let length = this._sock.rQshift8();
+
+        if (this._sock.rQwait("ServerFence payload", length, 9)) { return false; }
+
+        if (length > 64) {
+            Log.Warn("Bad payload length (" + length + ") in fence response");
+            length = 64;
+        }
+
+        const payload = this._sock.rQshiftStr(length);
+
+        this._supportsFence = true;
+
+        /*
+         * Fence flags
+         *
+         *  (1<<0)  - BlockBefore
+         *  (1<<1)  - BlockAfter
+         *  (1<<2)  - SyncNext
+         *  (1<<31) - Request
+         */
+
+        if (!(flags & (1<<31))) {
+            return this._fail("Unexpected fence response");
+        }
+
+        // Filter out unsupported flags
+        // FIXME: support syncNext
+        flags &= (1<<0) | (1<<1);
+
+        // BlockBefore and BlockAfter are automatically handled by
+        // the fact that we process each incoming message
+        // synchronuosly.
+        RFB.messages.clientFence(this._sock, flags, payload);
+
+        return true;
+    }
+
+    _handleXvpMsg() {
+        if (this._sock.rQwait("XVP version and message", 3, 1)) { return false; }
+        this._sock.rQskipBytes(1);  // Padding
+        const xvpVer = this._sock.rQshift8();
+        const xvpMsg = this._sock.rQshift8();
+
+        switch (xvpMsg) {
+            case 0:  // XVP_FAIL
+                Log.Error("XVP Operation Failed");
+                break;
+            case 1:  // XVP_INIT
+                this._rfbXvpVer = xvpVer;
+                Log.Info("XVP extensions enabled (version " + this._rfbXvpVer + ")");
+                this._setCapability("power", true);
+                break;
+            default:
+                this._fail("Illegal server XVP message (msg: " + xvpMsg + ")");
+                break;
+        }
+
+        return true;
+    }
+
+    _normalMsg() {
+        let msgType;
+        if (this._FBU.rects > 0) {
+            msgType = 0;
+        } else {
+            msgType = this._sock.rQshift8();
+        }
+
+        let first, ret;
+        switch (msgType) {
+            case 0:  // FramebufferUpdate
+                ret = this._framebufferUpdate();
+                if (ret && !this._enabledContinuousUpdates) {
+                    RFB.messages.fbUpdateRequest(this._sock, true, 0, 0,
+                                                 this._fbWidth, this._fbHeight);
+                }
+                return ret;
+
+            case 1:  // SetColorMapEntries
+                return this._handleSetColourMapMsg();
+
+            case 2:  // Bell
+                Log.Debug("Bell");
+                this.dispatchEvent(new CustomEvent(
+                    "bell",
+                    { detail: {} }));
+                return true;
+
+            case 3:  // ServerCutText
+                return this._handleServerCutText();
+
+            case 150: // EndOfContinuousUpdates
+                first = !this._supportsContinuousUpdates;
+                this._supportsContinuousUpdates = true;
+                this._enabledContinuousUpdates = false;
+                if (first) {
+                    this._enabledContinuousUpdates = true;
+                    this._updateContinuousUpdates();
+                    Log.Info("Enabling continuous updates.");
+                } else {
+                    // FIXME: We need to send a framebufferupdaterequest here
+                    // if we add support for turning off continuous updates
+                }
+                return true;
+
+            case 248: // ServerFence
+                return this._handleServerFenceMsg();
+
+            case 250:  // XVP
+                return this._handleXvpMsg();
+
+            default:
+                this._fail("Unexpected server message (type " + msgType + ")");
+                Log.Debug("sock.rQslice(0, 30): " + this._sock.rQslice(0, 30));
+                return true;
+        }
+    }
+
+    _onFlush() {
+        this._flushing = false;
+        // Resume processing
+        if (this._sock.rQlen > 0) {
+            this._handleMessage();
+        }
+    }
+
+    _framebufferUpdate() {
+        if (this._FBU.rects === 0) {
+            if (this._sock.rQwait("FBU header", 3, 1)) { return false; }
+            this._sock.rQskipBytes(1);  // Padding
+            this._FBU.rects = this._sock.rQshift16();
+
+            // Make sure the previous frame is fully rendered first
+            // to avoid building up an excessive queue
+            if (this._display.pending()) {
+                this._flushing = true;
+                this._display.flush();
+                return false;
+            }
+        }
+
+        while (this._FBU.rects > 0) {
+            if (this._FBU.encoding === null) {
+                if (this._sock.rQwait("rect header", 12)) { return false; }
+                /* New FramebufferUpdate */
+
+                const hdr = this._sock.rQshiftBytes(12);
+                this._FBU.x        = (hdr[0] << 8) + hdr[1];
+                this._FBU.y        = (hdr[2] << 8) + hdr[3];
+                this._FBU.width    = (hdr[4] << 8) + hdr[5];
+                this._FBU.height   = (hdr[6] << 8) + hdr[7];
+                this._FBU.encoding = parseInt((hdr[8] << 24) + (hdr[9] << 16) +
+                                              (hdr[10] << 8) + hdr[11], 10);
+            }
+
+            if (!this._handleRect()) {
+                return false;
+            }
+
+            this._FBU.rects--;
+            this._FBU.encoding = null;
+        }
+
+        this._display.flip();
+
+        return true;  // We finished this FBU
+    }
+
+    _handleRect() {
+        switch (this._FBU.encoding) {
+            case encodings.pseudoEncodingLastRect:
+                this._FBU.rects = 1; // Will be decreased when we return
+                return true;
+
+            case encodings.pseudoEncodingVMwareCursor:
+                return this._handleVMwareCursor();
+
+            case encodings.pseudoEncodingCursor:
+                return this._handleCursor();
+
+            case encodings.pseudoEncodingQEMUExtendedKeyEvent:
+                this._qemuExtKeyEventSupported = true;
+                return true;
+
+            case encodings.pseudoEncodingDesktopName:
+                return this._handleDesktopName();
+
+            case encodings.pseudoEncodingDesktopSize:
+                this._resize(this._FBU.width, this._FBU.height);
+                return true;
+
+            case encodings.pseudoEncodingExtendedDesktopSize:
+                return this._handleExtendedDesktopSize();
+
+            default:
+                return this._handleDataRect();
+        }
+    }
+
+    _handleVMwareCursor() {
+        const hotx = this._FBU.x;  // hotspot-x
+        const hoty = this._FBU.y;  // hotspot-y
+        const w = this._FBU.width;
+        const h = this._FBU.height;
+        if (this._sock.rQwait("VMware cursor encoding", 1)) {
+            return false;
+        }
+
+        const cursorType = this._sock.rQshift8();
+
+        this._sock.rQshift8(); //Padding
+
+        let rgba;
+        const bytesPerPixel = 4;
+
+        //Classic cursor
+        if (cursorType == 0) {
+            //Used to filter away unimportant bits.
+            //OR is used for correct conversion in js.
+            const PIXEL_MASK = 0xffffff00 | 0;
+            rgba = new Array(w * h * bytesPerPixel);
+
+            if (this._sock.rQwait("VMware cursor classic encoding",
+                                  (w * h * bytesPerPixel) * 2, 2)) {
+                return false;
+            }
+
+            let andMask = new Array(w * h);
+            for (let pixel = 0; pixel < (w * h); pixel++) {
+                andMask[pixel] = this._sock.rQshift32();
+            }
+
+            let xorMask = new Array(w * h);
+            for (let pixel = 0; pixel < (w * h); pixel++) {
+                xorMask[pixel] = this._sock.rQshift32();
+            }
+
+            for (let pixel = 0; pixel < (w * h); pixel++) {
+                if (andMask[pixel] == 0) {
+                    //Fully opaque pixel
+                    let bgr = xorMask[pixel];
+                    let r   = bgr >> 8  & 0xff;
+                    let g   = bgr >> 16 & 0xff;
+                    let b   = bgr >> 24 & 0xff;
+
+                    rgba[(pixel * bytesPerPixel)     ] = r;    //r
+                    rgba[(pixel * bytesPerPixel) + 1 ] = g;    //g
+                    rgba[(pixel * bytesPerPixel) + 2 ] = b;    //b
+                    rgba[(pixel * bytesPerPixel) + 3 ] = 0xff; //a
+
+                } else if ((andMask[pixel] & PIXEL_MASK) ==
+                           PIXEL_MASK) {
+                    //Only screen value matters, no mouse colouring
+                    if (xorMask[pixel] == 0) {
+                        //Transparent pixel
+                        rgba[(pixel * bytesPerPixel)     ] = 0x00;
+                        rgba[(pixel * bytesPerPixel) + 1 ] = 0x00;
+                        rgba[(pixel * bytesPerPixel) + 2 ] = 0x00;
+                        rgba[(pixel * bytesPerPixel) + 3 ] = 0x00;
+
+                    } else if ((xorMask[pixel] & PIXEL_MASK) ==
+                               PIXEL_MASK) {
+                        //Inverted pixel, not supported in browsers.
+                        //Fully opaque instead.
+                        rgba[(pixel * bytesPerPixel)     ] = 0x00;
+                        rgba[(pixel * bytesPerPixel) + 1 ] = 0x00;
+                        rgba[(pixel * bytesPerPixel) + 2 ] = 0x00;
+                        rgba[(pixel * bytesPerPixel) + 3 ] = 0xff;
+
+                    } else {
+                        //Unhandled xorMask
+                        rgba[(pixel * bytesPerPixel)     ] = 0x00;
+                        rgba[(pixel * bytesPerPixel) + 1 ] = 0x00;
+                        rgba[(pixel * bytesPerPixel) + 2 ] = 0x00;
+                        rgba[(pixel * bytesPerPixel) + 3 ] = 0xff;
+                    }
+
+                } else {
+                    //Unhandled andMask
+                    rgba[(pixel * bytesPerPixel)     ] = 0x00;
+                    rgba[(pixel * bytesPerPixel) + 1 ] = 0x00;
+                    rgba[(pixel * bytesPerPixel) + 2 ] = 0x00;
+                    rgba[(pixel * bytesPerPixel) + 3 ] = 0xff;
+                }
+            }
+
+        //Alpha cursor.
+        } else if (cursorType == 1) {
+            if (this._sock.rQwait("VMware cursor alpha encoding",
+                                  (w * h * 4), 2)) {
+                return false;
+            }
+
+            rgba = new Array(w * h * bytesPerPixel);
+
+            for (let pixel = 0; pixel < (w * h); pixel++) {
+                let data = this._sock.rQshift32();
+
+                rgba[(pixel * 4)     ] = data >> 24 & 0xff; //r
+                rgba[(pixel * 4) + 1 ] = data >> 16 & 0xff; //g
+                rgba[(pixel * 4) + 2 ] = data >> 8 & 0xff;  //b
+                rgba[(pixel * 4) + 3 ] = data & 0xff;       //a
+            }
+
+        } else {
+            Log.Warn("The given cursor type is not supported: "
+                      + cursorType + " given.");
+            return false;
+        }
+
+        this._updateCursor(rgba, hotx, hoty, w, h);
+
+        return true;
+    }
+
+    _handleCursor() {
+        const hotx = this._FBU.x;  // hotspot-x
+        const hoty = this._FBU.y;  // hotspot-y
+        const w = this._FBU.width;
+        const h = this._FBU.height;
+
+        const pixelslength = w * h * 4;
+        const masklength = Math.ceil(w / 8) * h;
+
+        let bytes = pixelslength + masklength;
+        if (this._sock.rQwait("cursor encoding", bytes)) {
+            return false;
+        }
+
+        // Decode from BGRX pixels + bit mask to RGBA
+        const pixels = this._sock.rQshiftBytes(pixelslength);
+        const mask = this._sock.rQshiftBytes(masklength);
+        let rgba = new Uint8Array(w * h * 4);
+
+        let pixIdx = 0;
+        for (let y = 0; y < h; y++) {
+            for (let x = 0; x < w; x++) {
+                let maskIdx = y * Math.ceil(w / 8) + Math.floor(x / 8);
+                let alpha = (mask[maskIdx] << (x % 8)) & 0x80 ? 255 : 0;
+                rgba[pixIdx    ] = pixels[pixIdx + 2];
+                rgba[pixIdx + 1] = pixels[pixIdx + 1];
+                rgba[pixIdx + 2] = pixels[pixIdx];
+                rgba[pixIdx + 3] = alpha;
+                pixIdx += 4;
+            }
+        }
+
+        this._updateCursor(rgba, hotx, hoty, w, h);
+
+        return true;
+    }
+
+    _handleDesktopName() {
+        if (this._sock.rQwait("DesktopName", 4)) {
+            return false;
+        }
+
+        let length = this._sock.rQshift32();
+
+        if (this._sock.rQwait("DesktopName", length, 4)) {
+            return false;
+        }
+
+        let name = this._sock.rQshiftStr(length);
+        name = decodeUTF8(name, true);
+
+        this._setDesktopName(name);
+
+        return true;
+    }
+
+    _handleExtendedDesktopSize() {
+        if (this._sock.rQwait("ExtendedDesktopSize", 4)) {
+            return false;
+        }
+
+        const numberOfScreens = this._sock.rQpeek8();
+
+        let bytes = 4 + (numberOfScreens * 16);
+        if (this._sock.rQwait("ExtendedDesktopSize", bytes)) {
+            return false;
+        }
+
+        const firstUpdate = !this._supportsSetDesktopSize;
+        this._supportsSetDesktopSize = true;
+
+        // Normally we only apply the current resize mode after a
+        // window resize event. However there is no such trigger on the
+        // initial connect. And we don't know if the server supports
+        // resizing until we've gotten here.
+        if (firstUpdate) {
+            this._requestRemoteResize();
+        }
+
+        this._sock.rQskipBytes(1);  // number-of-screens
+        this._sock.rQskipBytes(3);  // padding
+
+        for (let i = 0; i < numberOfScreens; i += 1) {
+            // Save the id and flags of the first screen
+            if (i === 0) {
+                this._screenID = this._sock.rQshiftBytes(4);    // id
+                this._sock.rQskipBytes(2);                       // x-position
+                this._sock.rQskipBytes(2);                       // y-position
+                this._sock.rQskipBytes(2);                       // width
+                this._sock.rQskipBytes(2);                       // height
+                this._screenFlags = this._sock.rQshiftBytes(4); // flags
+            } else {
+                this._sock.rQskipBytes(16);
+            }
+        }
+
+        /*
+         * The x-position indicates the reason for the change:
+         *
+         *  0 - server resized on its own
+         *  1 - this client requested the resize
+         *  2 - another client requested the resize
+         */
+
+        // We need to handle errors when we requested the resize.
+        if (this._FBU.x === 1 && this._FBU.y !== 0) {
+            let msg = "";
+            // The y-position indicates the status code from the server
+            switch (this._FBU.y) {
+                case 1:
+                    msg = "Resize is administratively prohibited";
+                    break;
+                case 2:
+                    msg = "Out of resources";
+                    break;
+                case 3:
+                    msg = "Invalid screen layout";
+                    break;
+                default:
+                    msg = "Unknown reason";
+                    break;
+            }
+            Log.Warn("Server did not accept the resize request: "
+                     + msg);
+        } else {
+            this._resize(this._FBU.width, this._FBU.height);
+        }
+
+        return true;
+    }
+
+    _handleDataRect() {
+        let decoder = this._decoders[this._FBU.encoding];
+        if (!decoder) {
+            this._fail("Unsupported encoding (encoding: " +
+                       this._FBU.encoding + ")");
+            return false;
+        }
+
+        try {
+            return decoder.decodeRect(this._FBU.x, this._FBU.y,
+                                      this._FBU.width, this._FBU.height,
+                                      this._sock, this._display,
+                                      this._fbDepth);
+        } catch (err) {
+            this._fail("Error decoding rect: " + err);
+            return false;
+        }
+    }
+
+    _updateContinuousUpdates() {
+        if (!this._enabledContinuousUpdates) { return; }
+
+        RFB.messages.enableContinuousUpdates(this._sock, true, 0, 0,
+                                             this._fbWidth, this._fbHeight);
+    }
+
+    _resize(width, height) {
+        this._fbWidth = width;
+        this._fbHeight = height;
+
+        this._display.resize(this._fbWidth, this._fbHeight);
+
+        // Adjust the visible viewport based on the new dimensions
+        this._updateClip();
+        this._updateScale();
+
+        this._updateContinuousUpdates();
+    }
+
+    _xvpOp(ver, op) {
+        if (this._rfbXvpVer < ver) { return; }
+        Log.Info("Sending XVP operation " + op + " (version " + ver + ")");
+        RFB.messages.xvpOp(this._sock, ver, op);
+    }
+
+    _updateCursor(rgba, hotx, hoty, w, h) {
+        this._cursorImage = {
+            rgbaPixels: rgba,
+            hotx: hotx, hoty: hoty, w: w, h: h,
+        };
+        this._refreshCursor();
+    }
+
+    _shouldShowDotCursor() {
+        // Called when this._cursorImage is updated
+        if (!this._showDotCursor) {
+            // User does not want to see the dot, so...
+            return false;
+        }
+
+        // The dot should not be shown if the cursor is already visible,
+        // i.e. contains at least one not-fully-transparent pixel.
+        // So iterate through all alpha bytes in rgba and stop at the
+        // first non-zero.
+        for (let i = 3; i < this._cursorImage.rgbaPixels.length; i += 4) {
+            if (this._cursorImage.rgbaPixels[i]) {
+                return false;
+            }
+        }
+
+        // At this point, we know that the cursor is fully transparent, and
+        // the user wants to see the dot instead of this.
+        return true;
+    }
+
+    _refreshCursor() {
+        if (this._rfbConnectionState !== "connecting" &&
+            this._rfbConnectionState !== "connected") {
+            return;
+        }
+        const image = this._shouldShowDotCursor() ? RFB.cursors.dot : this._cursorImage;
+        this._cursor.change(image.rgbaPixels,
+                            image.hotx, image.hoty,
+                            image.w, image.h
+        );
+    }
+
+    static genDES(password, challenge) {
+        const passwordChars = password.split('').map(c => c.charCodeAt(0));
+        return (new DES(passwordChars)).encrypt(challenge);
+    }
+}
+
+// Class Methods
+RFB.messages = {
+    keyEvent(sock, keysym, down) {
+        const buff = sock._sQ;
+        const offset = sock._sQlen;
+
+        buff[offset] = 4;  // msg-type
+        buff[offset + 1] = down;
+
+        buff[offset + 2] = 0;
+        buff[offset + 3] = 0;
+
+        buff[offset + 4] = (keysym >> 24);
+        buff[offset + 5] = (keysym >> 16);
+        buff[offset + 6] = (keysym >> 8);
+        buff[offset + 7] = keysym;
+
+        sock._sQlen += 8;
+        sock.flush();
+    },
+
+    QEMUExtendedKeyEvent(sock, keysym, down, keycode) {
+        function getRFBkeycode(xtScanCode) {
+            const upperByte = (keycode >> 8);
+            const lowerByte = (keycode & 0x00ff);
+            if (upperByte === 0xe0 && lowerByte < 0x7f) {
+                return lowerByte | 0x80;
+            }
+            return xtScanCode;
+        }
+
+        const buff = sock._sQ;
+        const offset = sock._sQlen;
+
+        buff[offset] = 255; // msg-type
+        buff[offset + 1] = 0; // sub msg-type
+
+        buff[offset + 2] = (down >> 8);
+        buff[offset + 3] = down;
+
+        buff[offset + 4] = (keysym >> 24);
+        buff[offset + 5] = (keysym >> 16);
+        buff[offset + 6] = (keysym >> 8);
+        buff[offset + 7] = keysym;
+
+        const RFBkeycode = getRFBkeycode(keycode);
+
+        buff[offset + 8] = (RFBkeycode >> 24);
+        buff[offset + 9] = (RFBkeycode >> 16);
+        buff[offset + 10] = (RFBkeycode >> 8);
+        buff[offset + 11] = RFBkeycode;
+
+        sock._sQlen += 12;
+        sock.flush();
+    },
+
+    pointerEvent(sock, x, y, mask) {
+        const buff = sock._sQ;
+        const offset = sock._sQlen;
+
+        buff[offset] = 5; // msg-type
+
+        buff[offset + 1] = mask;
+
+        buff[offset + 2] = x >> 8;
+        buff[offset + 3] = x;
+
+        buff[offset + 4] = y >> 8;
+        buff[offset + 5] = y;
+
+        sock._sQlen += 6;
+        sock.flush();
+    },
+
+    // Used to build Notify and Request data.
+    _buildExtendedClipboardFlags(actions, formats) {
+        let data = new Uint8Array(4);
+        let formatFlag = 0x00000000;
+        let actionFlag = 0x00000000;
+
+        for (let i = 0; i < actions.length; i++) {
+            actionFlag |= actions[i];
+        }
+
+        for (let i = 0; i < formats.length; i++) {
+            formatFlag |= formats[i];
+        }
+
+        data[0] = actionFlag >> 24; // Actions
+        data[1] = 0x00;             // Reserved
+        data[2] = 0x00;             // Reserved
+        data[3] = formatFlag;       // Formats
+
+        return data;
+    },
+
+    extendedClipboardProvide(sock, formats, inData) {
+        // Deflate incomming data and their sizes
+        let deflator = new Deflator();
+        let dataToDeflate = [];
+
+        for (let i = 0; i < formats.length; i++) {
+            // We only support the format Text at this time
+            if (formats[i] != extendedClipboardFormatText) {
+                throw new Error("Unsupported extended clipboard format for Provide message.");
+            }
+
+            // Change lone \r or \n into \r\n as defined in rfbproto
+            inData[i] = inData[i].replace(/\r\n|\r|\n/gm, "\r\n");
+
+            // Check if it already has \0
+            let text = encodeUTF8(inData[i] + "\0");
+
+            dataToDeflate.push( (text.length >> 24) & 0xFF,
+                                (text.length >> 16) & 0xFF,
+                                (text.length >>  8) & 0xFF,
+                                (text.length & 0xFF));
+
+            for (let j = 0; j < text.length; j++) {
+                dataToDeflate.push(text.charCodeAt(j));
+            }
+        }
+
+        let deflatedData = deflator.deflate(new Uint8Array(dataToDeflate));
+
+        // Build data  to send
+        let data = new Uint8Array(4 + deflatedData.length);
+        data.set(RFB.messages._buildExtendedClipboardFlags([extendedClipboardActionProvide],
+                                                           formats));
+        data.set(deflatedData, 4);
+
+        RFB.messages.clientCutText(sock, data, true);
+    },
+
+    extendedClipboardNotify(sock, formats) {
+        let flags = RFB.messages._buildExtendedClipboardFlags([extendedClipboardActionNotify],
+                                                              formats);
+        RFB.messages.clientCutText(sock, flags, true);
+    },
+
+    extendedClipboardRequest(sock, formats) {
+        let flags = RFB.messages._buildExtendedClipboardFlags([extendedClipboardActionRequest],
+                                                              formats);
+        RFB.messages.clientCutText(sock, flags, true);
+    },
+
+    extendedClipboardCaps(sock, actions, formats) {
+        let formatKeys = Object.keys(formats);
+        let data  = new Uint8Array(4 + (4 * formatKeys.length));
+
+        formatKeys.map(x => parseInt(x));
+        formatKeys.sort((a, b) =>  a - b);
+
+        data.set(RFB.messages._buildExtendedClipboardFlags(actions, []));
+
+        let loopOffset = 4;
+        for (let i = 0; i < formatKeys.length; i++) {
+            data[loopOffset]     = formats[formatKeys[i]] >> 24;
+            data[loopOffset + 1] = formats[formatKeys[i]] >> 16;
+            data[loopOffset + 2] = formats[formatKeys[i]] >> 8;
+            data[loopOffset + 3] = formats[formatKeys[i]] >> 0;
+
+            loopOffset += 4;
+            data[3] |= (1 << formatKeys[i]); // Update our format flags
+        }
+
+        RFB.messages.clientCutText(sock, data, true);
+    },
+
+    clientCutText(sock, data, extended = false) {
+        const buff = sock._sQ;
+        const offset = sock._sQlen;
+
+        buff[offset] = 6; // msg-type
+
+        buff[offset + 1] = 0; // padding
+        buff[offset + 2] = 0; // padding
+        buff[offset + 3] = 0; // padding
+
+        let length;
+        if (extended) {
+            length = toUnsigned32bit(-data.length);
+        } else {
+            length = data.length;
+        }
+
+        buff[offset + 4] = length >> 24;
+        buff[offset + 5] = length >> 16;
+        buff[offset + 6] = length >> 8;
+        buff[offset + 7] = length;
+
+        sock._sQlen += 8;
+
+        // We have to keep track of from where in the data we begin creating the
+        // buffer for the flush in the next iteration.
+        let dataOffset = 0;
+
+        let remaining = data.length;
+        while (remaining > 0) {
+
+            let flushSize = Math.min(remaining, (sock._sQbufferSize - sock._sQlen));
+            for (let i = 0; i < flushSize; i++) {
+                buff[sock._sQlen + i] = data[dataOffset + i];
+            }
+
+            sock._sQlen += flushSize;
+            sock.flush();
+
+            remaining -= flushSize;
+            dataOffset += flushSize;
+        }
+
+    },
+
+    setDesktopSize(sock, width, height, id, flags) {
+        const buff = sock._sQ;
+        const offset = sock._sQlen;
+
+        buff[offset] = 251;              // msg-type
+        buff[offset + 1] = 0;            // padding
+        buff[offset + 2] = width >> 8;   // width
+        buff[offset + 3] = width;
+        buff[offset + 4] = height >> 8;  // height
+        buff[offset + 5] = height;
+
+        buff[offset + 6] = 1;            // number-of-screens
+        buff[offset + 7] = 0;            // padding
+
+        // screen array
+        buff[offset + 8] = id >> 24;     // id
+        buff[offset + 9] = id >> 16;
+        buff[offset + 10] = id >> 8;
+        buff[offset + 11] = id;
+        buff[offset + 12] = 0;           // x-position
+        buff[offset + 13] = 0;
+        buff[offset + 14] = 0;           // y-position
+        buff[offset + 15] = 0;
+        buff[offset + 16] = width >> 8;  // width
+        buff[offset + 17] = width;
+        buff[offset + 18] = height >> 8; // height
+        buff[offset + 19] = height;
+        buff[offset + 20] = flags >> 24; // flags
+        buff[offset + 21] = flags >> 16;
+        buff[offset + 22] = flags >> 8;
+        buff[offset + 23] = flags;
+
+        sock._sQlen += 24;
+        sock.flush();
+    },
+
+    clientFence(sock, flags, payload) {
+        const buff = sock._sQ;
+        const offset = sock._sQlen;
+
+        buff[offset] = 248; // msg-type
+
+        buff[offset + 1] = 0; // padding
+        buff[offset + 2] = 0; // padding
+        buff[offset + 3] = 0; // padding
+
+        buff[offset + 4] = flags >> 24; // flags
+        buff[offset + 5] = flags >> 16;
+        buff[offset + 6] = flags >> 8;
+        buff[offset + 7] = flags;
+
+        const n = payload.length;
+
+        buff[offset + 8] = n; // length
+
+        for (let i = 0; i < n; i++) {
+            buff[offset + 9 + i] = payload.charCodeAt(i);
+        }
+
+        sock._sQlen += 9 + n;
+        sock.flush();
+    },
+
+    enableContinuousUpdates(sock, enable, x, y, width, height) {
+        const buff = sock._sQ;
+        const offset = sock._sQlen;
+
+        buff[offset] = 150;             // msg-type
+        buff[offset + 1] = enable;      // enable-flag
+
+        buff[offset + 2] = x >> 8;      // x
+        buff[offset + 3] = x;
+        buff[offset + 4] = y >> 8;      // y
+        buff[offset + 5] = y;
+        buff[offset + 6] = width >> 8;  // width
+        buff[offset + 7] = width;
+        buff[offset + 8] = height >> 8; // height
+        buff[offset + 9] = height;
+
+        sock._sQlen += 10;
+        sock.flush();
+    },
+
+    pixelFormat(sock, depth, trueColor) {
+        const buff = sock._sQ;
+        const offset = sock._sQlen;
+
+        let bpp;
+
+        if (depth > 16) {
+            bpp = 32;
+        } else if (depth > 8) {
+            bpp = 16;
+        } else {
+            bpp = 8;
+        }
+
+        const bits = Math.floor(depth/3);
+
+        buff[offset] = 0;  // msg-type
+
+        buff[offset + 1] = 0; // padding
+        buff[offset + 2] = 0; // padding
+        buff[offset + 3] = 0; // padding
+
+        buff[offset + 4] = bpp;                 // bits-per-pixel
+        buff[offset + 5] = depth;               // depth
+        buff[offset + 6] = 0;                   // little-endian
+        buff[offset + 7] = trueColor ? 1 : 0;  // true-color
+
+        buff[offset + 8] = 0;    // red-max
+        buff[offset + 9] = (1 << bits) - 1;  // red-max
+
+        buff[offset + 10] = 0;   // green-max
+        buff[offset + 11] = (1 << bits) - 1; // green-max
+
+        buff[offset + 12] = 0;   // blue-max
+        buff[offset + 13] = (1 << bits) - 1; // blue-max
+
+        buff[offset + 14] = bits * 0; // red-shift
+        buff[offset + 15] = bits * 1; // green-shift
+        buff[offset + 16] = bits * 2; // blue-shift
+
+        buff[offset + 17] = 0;   // padding
+        buff[offset + 18] = 0;   // padding
+        buff[offset + 19] = 0;   // padding
+
+        sock._sQlen += 20;
+        sock.flush();
+    },
+
+    clientEncodings(sock, encodings) {
+        const buff = sock._sQ;
+        const offset = sock._sQlen;
+
+        buff[offset] = 2; // msg-type
+        buff[offset + 1] = 0; // padding
+
+        buff[offset + 2] = encodings.length >> 8;
+        buff[offset + 3] = encodings.length;
+
+        let j = offset + 4;
+        for (let i = 0; i < encodings.length; i++) {
+            const enc = encodings[i];
+            buff[j] = enc >> 24;
+            buff[j + 1] = enc >> 16;
+            buff[j + 2] = enc >> 8;
+            buff[j + 3] = enc;
+
+            j += 4;
+        }
+
+        sock._sQlen += j - offset;
+        sock.flush();
+    },
+
+    fbUpdateRequest(sock, incremental, x, y, w, h) {
+        const buff = sock._sQ;
+        const offset = sock._sQlen;
+
+        if (typeof(x) === "undefined") { x = 0; }
+        if (typeof(y) === "undefined") { y = 0; }
+
+        buff[offset] = 3;  // msg-type
+        buff[offset + 1] = incremental ? 1 : 0;
+
+        buff[offset + 2] = (x >> 8) & 0xFF;
+        buff[offset + 3] = x & 0xFF;
+
+        buff[offset + 4] = (y >> 8) & 0xFF;
+        buff[offset + 5] = y & 0xFF;
+
+        buff[offset + 6] = (w >> 8) & 0xFF;
+        buff[offset + 7] = w & 0xFF;
+
+        buff[offset + 8] = (h >> 8) & 0xFF;
+        buff[offset + 9] = h & 0xFF;
+
+        sock._sQlen += 10;
+        sock.flush();
+    },
+
+    xvpOp(sock, ver, op) {
+        const buff = sock._sQ;
+        const offset = sock._sQlen;
+
+        buff[offset] = 250; // msg-type
+        buff[offset + 1] = 0; // padding
+
+        buff[offset + 2] = ver;
+        buff[offset + 3] = op;
+
+        sock._sQlen += 4;
+        sock.flush();
+    }
+};
+
+RFB.cursors = {
+    none: {
+        rgbaPixels: new Uint8Array(),
+        w: 0, h: 0,
+        hotx: 0, hoty: 0,
+    },
+
+    dot: {
+        /* eslint-disable indent */
+        rgbaPixels: new Uint8Array([
+            255, 255, 255, 255,   0,   0,   0, 255, 255, 255, 255, 255,
+              0,   0,   0, 255,   0,   0,   0,   0,   0,   0,  0,  255,
+            255, 255, 255, 255,   0,   0,   0, 255, 255, 255, 255, 255,
+        ]),
+        /* eslint-enable indent */
+        w: 3, h: 3,
+        hotx: 1, hoty: 1,
+    }
+};

static/novnc/core/util/browser.js

@@ -0,0 +1,103 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ *
+ * Browser feature support detection
+ */
+
+import * as Log from './logging.js';
+
+// Touch detection
+export let isTouchDevice = ('ontouchstart' in document.documentElement) ||
+                                 // requried for Chrome debugger
+                                 (document.ontouchstart !== undefined) ||
+                                 // required for MS Surface
+                                 (navigator.maxTouchPoints > 0) ||
+                                 (navigator.msMaxTouchPoints > 0);
+window.addEventListener('touchstart', function onFirstTouch() {
+    isTouchDevice = true;
+    window.removeEventListener('touchstart', onFirstTouch, false);
+}, false);
+
+
+// The goal is to find a certain physical width, the devicePixelRatio
+// brings us a bit closer but is not optimal.
+export let dragThreshold = 10 * (window.devicePixelRatio || 1);
+
+let _supportsCursorURIs = false;
+
+try {
+    const target = document.createElement('canvas');
+    target.style.cursor = 'url("data:image/x-icon;base64,AAACAAEACAgAAAIAAgA4AQAAFgAAACgAAAAIAAAAEAAAAAEAIAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAD/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////AAAAAAAAAAAAAAAAAAAAAA==") 2 2, default';
+
+    if (target.style.cursor.indexOf("url") === 0) {
+        Log.Info("Data URI scheme cursor supported");
+        _supportsCursorURIs = true;
+    } else {
+        Log.Warn("Data URI scheme cursor not supported");
+    }
+} catch (exc) {
+    Log.Error("Data URI scheme cursor test exception: " + exc);
+}
+
+export const supportsCursorURIs = _supportsCursorURIs;
+
+let _hasScrollbarGutter = true;
+try {
+    // Create invisible container
+    const container = document.createElement('div');
+    container.style.visibility = 'hidden';
+    container.style.overflow = 'scroll'; // forcing scrollbars
+    document.body.appendChild(container);
+
+    // Create a div and place it in the container
+    const child = document.createElement('div');
+    container.appendChild(child);
+
+    // Calculate the difference between the container's full width
+    // and the child's width - the difference is the scrollbars
+    const scrollbarWidth = (container.offsetWidth - child.offsetWidth);
+
+    // Clean up
+    container.parentNode.removeChild(container);
+
+    _hasScrollbarGutter = scrollbarWidth != 0;
+} catch (exc) {
+    Log.Error("Scrollbar test exception: " + exc);
+}
+export const hasScrollbarGutter = _hasScrollbarGutter;
+
+/*
+ * The functions for detection of platforms and browsers below are exported
+ * but the use of these should be minimized as much as possible.
+ *
+ * It's better to use feature detection than platform detection.
+ */
+
+export function isMac() {
+    return navigator && !!(/mac/i).exec(navigator.platform);
+}
+
+export function isWindows() {
+    return navigator && !!(/win/i).exec(navigator.platform);
+}
+
+export function isIOS() {
+    return navigator &&
+           (!!(/ipad/i).exec(navigator.platform) ||
+            !!(/iphone/i).exec(navigator.platform) ||
+            !!(/ipod/i).exec(navigator.platform));
+}
+
+export function isSafari() {
+    return navigator && (navigator.userAgent.indexOf('Safari') !== -1 &&
+                         navigator.userAgent.indexOf('Chrome') === -1);
+}
+
+export function isFirefox() {
+    return navigator && !!(/firefox/i).exec(navigator.userAgent);
+}
+

static/novnc/core/util/cursor.js

@@ -0,0 +1,243 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 or any later version (see LICENSE.txt)
+ */
+
+import { supportsCursorURIs, isTouchDevice } from './browser.js';
+
+const useFallback = !supportsCursorURIs || isTouchDevice;
+
+export default class Cursor {
+    constructor() {
+        this._target = null;
+
+        this._canvas = document.createElement('canvas');
+
+        if (useFallback) {
+            this._canvas.style.position = 'fixed';
+            this._canvas.style.zIndex = '65535';
+            this._canvas.style.pointerEvents = 'none';
+            // Can't use "display" because of Firefox bug #1445997
+            this._canvas.style.visibility = 'hidden';
+        }
+
+        this._position = { x: 0, y: 0 };
+        this._hotSpot = { x: 0, y: 0 };
+
+        this._eventHandlers = {
+            'mouseover': this._handleMouseOver.bind(this),
+            'mouseleave': this._handleMouseLeave.bind(this),
+            'mousemove': this._handleMouseMove.bind(this),
+            'mouseup': this._handleMouseUp.bind(this),
+        };
+    }
+
+    attach(target) {
+        if (this._target) {
+            this.detach();
+        }
+
+        this._target = target;
+
+        if (useFallback) {
+            document.body.appendChild(this._canvas);
+
+            const options = { capture: true, passive: true };
+            this._target.addEventListener('mouseover', this._eventHandlers.mouseover, options);
+            this._target.addEventListener('mouseleave', this._eventHandlers.mouseleave, options);
+            this._target.addEventListener('mousemove', this._eventHandlers.mousemove, options);
+            this._target.addEventListener('mouseup', this._eventHandlers.mouseup, options);
+        }
+
+        this.clear();
+    }
+
+    detach() {
+        if (!this._target) {
+            return;
+        }
+
+        if (useFallback) {
+            const options = { capture: true, passive: true };
+            this._target.removeEventListener('mouseover', this._eventHandlers.mouseover, options);
+            this._target.removeEventListener('mouseleave', this._eventHandlers.mouseleave, options);
+            this._target.removeEventListener('mousemove', this._eventHandlers.mousemove, options);
+            this._target.removeEventListener('mouseup', this._eventHandlers.mouseup, options);
+
+            document.body.removeChild(this._canvas);
+        }
+
+        this._target = null;
+    }
+
+    change(rgba, hotx, hoty, w, h) {
+        if ((w === 0) || (h === 0)) {
+            this.clear();
+            return;
+        }
+
+        this._position.x = this._position.x + this._hotSpot.x - hotx;
+        this._position.y = this._position.y + this._hotSpot.y - hoty;
+        this._hotSpot.x = hotx;
+        this._hotSpot.y = hoty;
+
+        let ctx = this._canvas.getContext('2d');
+
+        this._canvas.width = w;
+        this._canvas.height = h;
+
+        let img = new ImageData(new Uint8ClampedArray(rgba), w, h);
+        ctx.clearRect(0, 0, w, h);
+        ctx.putImageData(img, 0, 0);
+
+        if (useFallback) {
+            this._updatePosition();
+        } else {
+            let url = this._canvas.toDataURL();
+            this._target.style.cursor = 'url(' + url + ')' + hotx + ' ' + hoty + ', default';
+        }
+    }
+
+    clear() {
+        this._target.style.cursor = 'none';
+        this._canvas.width = 0;
+        this._canvas.height = 0;
+        this._position.x = this._position.x + this._hotSpot.x;
+        this._position.y = this._position.y + this._hotSpot.y;
+        this._hotSpot.x = 0;
+        this._hotSpot.y = 0;
+    }
+
+    // Mouse events might be emulated, this allows
+    // moving the cursor in such cases
+    move(clientX, clientY) {
+        if (!useFallback) {
+            return;
+        }
+        // clientX/clientY are relative the _visual viewport_,
+        // but our position is relative the _layout viewport_,
+        // so try to compensate when we can
+        if (window.visualViewport) {
+            this._position.x = clientX + window.visualViewport.offsetLeft;
+            this._position.y = clientY + window.visualViewport.offsetTop;
+        } else {
+            this._position.x = clientX;
+            this._position.y = clientY;
+        }
+        this._updatePosition();
+        let target = document.elementFromPoint(clientX, clientY);
+        this._updateVisibility(target);
+    }
+
+    _handleMouseOver(event) {
+        // This event could be because we're entering the target, or
+        // moving around amongst its sub elements. Let the move handler
+        // sort things out.
+        this._handleMouseMove(event);
+    }
+
+    _handleMouseLeave(event) {
+        // Check if we should show the cursor on the element we are leaving to
+        this._updateVisibility(event.relatedTarget);
+    }
+
+    _handleMouseMove(event) {
+        this._updateVisibility(event.target);
+
+        this._position.x = event.clientX - this._hotSpot.x;
+        this._position.y = event.clientY - this._hotSpot.y;
+
+        this._updatePosition();
+    }
+
+    _handleMouseUp(event) {
+        // We might get this event because of a drag operation that
+        // moved outside of the target. Check what's under the cursor
+        // now and adjust visibility based on that.
+        let target = document.elementFromPoint(event.clientX, event.clientY);
+        this._updateVisibility(target);
+
+        // Captures end with a mouseup but we can't know the event order of
+        // mouseup vs releaseCapture.
+        //
+        // In the cases when releaseCapture comes first, the code above is
+        // enough.
+        //
+        // In the cases when the mouseup comes first, we need wait for the
+        // browser to flush all events and then check again if the cursor
+        // should be visible.
+        if (this._captureIsActive()) {
+            window.setTimeout(() => {
+                // We might have detached at this point
+                if (!this._target) {
+                    return;
+                }
+                // Refresh the target from elementFromPoint since queued events
+                // might have altered the DOM
+                target = document.elementFromPoint(event.clientX,
+                                                   event.clientY);
+                this._updateVisibility(target);
+            }, 0);
+        }
+    }
+
+    _showCursor() {
+        if (this._canvas.style.visibility === 'hidden') {
+            this._canvas.style.visibility = '';
+        }
+    }
+
+    _hideCursor() {
+        if (this._canvas.style.visibility !== 'hidden') {
+            this._canvas.style.visibility = 'hidden';
+        }
+    }
+
+    // Should we currently display the cursor?
+    // (i.e. are we over the target, or a child of the target without a
+    // different cursor set)
+    _shouldShowCursor(target) {
+        if (!target) {
+            return false;
+        }
+        // Easy case
+        if (target === this._target) {
+            return true;
+        }
+        // Other part of the DOM?
+        if (!this._target.contains(target)) {
+            return false;
+        }
+        // Has the child its own cursor?
+        // FIXME: How can we tell that a sub element has an
+        //        explicit "cursor: none;"?
+        if (window.getComputedStyle(target).cursor !== 'none') {
+            return false;
+        }
+        return true;
+    }
+
+    _updateVisibility(target) {
+        // When the cursor target has capture we want to show the cursor.
+        // So, if a capture is active - look at the captured element instead.
+        if (this._captureIsActive()) {
+            target = document.captureElement;
+        }
+        if (this._shouldShowCursor(target)) {
+            this._showCursor();
+        } else {
+            this._hideCursor();
+        }
+    }
+
+    _updatePosition() {
+        this._canvas.style.left = this._position.x + "px";
+        this._canvas.style.top = this._position.y + "px";
+    }
+
+    _captureIsActive() {
+        return document.captureElement &&
+            document.documentElement.contains(document.captureElement);
+    }
+}

static/novnc/core/util/element.js

@@ -0,0 +1,32 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2020 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+/*
+ * HTML element utility functions
+ */
+
+export function clientToElement(x, y, elem) {
+    const bounds = elem.getBoundingClientRect();
+    let pos = { x: 0, y: 0 };
+    // Clip to target bounds
+    if (x < bounds.left) {
+        pos.x = 0;
+    } else if (x >= bounds.right) {
+        pos.x = bounds.width - 1;
+    } else {
+        pos.x = x - bounds.left;
+    }
+    if (y < bounds.top) {
+        pos.y = 0;
+    } else if (y >= bounds.bottom) {
+        pos.y = bounds.height - 1;
+    } else {
+        pos.y = y - bounds.top;
+    }
+    return pos;
+}

static/novnc/core/util/events.js

@@ -0,0 +1,138 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2018 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+/*
+ * Cross-browser event and position routines
+ */
+
+export function getPointerEvent(e) {
+    return e.changedTouches ? e.changedTouches[0] : e.touches ? e.touches[0] : e;
+}
+
+export function stopEvent(e) {
+    e.stopPropagation();
+    e.preventDefault();
+}
+
+// Emulate Element.setCapture() when not supported
+let _captureRecursion = false;
+let _elementForUnflushedEvents = null;
+document.captureElement = null;
+function _captureProxy(e) {
+    // Recursion protection as we'll see our own event
+    if (_captureRecursion) return;
+
+    // Clone the event as we cannot dispatch an already dispatched event
+    const newEv = new e.constructor(e.type, e);
+
+    _captureRecursion = true;
+    if (document.captureElement) {
+        document.captureElement.dispatchEvent(newEv);
+    } else {
+        _elementForUnflushedEvents.dispatchEvent(newEv);
+    }
+    _captureRecursion = false;
+
+    // Avoid double events
+    e.stopPropagation();
+
+    // Respect the wishes of the redirected event handlers
+    if (newEv.defaultPrevented) {
+        e.preventDefault();
+    }
+
+    // Implicitly release the capture on button release
+    if (e.type === "mouseup") {
+        releaseCapture();
+    }
+}
+
+// Follow cursor style of target element
+function _capturedElemChanged() {
+    const proxyElem = document.getElementById("noVNC_mouse_capture_elem");
+    proxyElem.style.cursor = window.getComputedStyle(document.captureElement).cursor;
+}
+
+const _captureObserver = new MutationObserver(_capturedElemChanged);
+
+export function setCapture(target) {
+    if (target.setCapture) {
+
+        target.setCapture();
+        document.captureElement = target;
+    } else {
+        // Release any existing capture in case this method is
+        // called multiple times without coordination
+        releaseCapture();
+
+        let proxyElem = document.getElementById("noVNC_mouse_capture_elem");
+
+        if (proxyElem === null) {
+            proxyElem = document.createElement("div");
+            proxyElem.id = "noVNC_mouse_capture_elem";
+            proxyElem.style.position = "fixed";
+            proxyElem.style.top = "0px";
+            proxyElem.style.left = "0px";
+            proxyElem.style.width = "100%";
+            proxyElem.style.height = "100%";
+            proxyElem.style.zIndex = 10000;
+            proxyElem.style.display = "none";
+            document.body.appendChild(proxyElem);
+
+            // This is to make sure callers don't get confused by having
+            // our blocking element as the target
+            proxyElem.addEventListener('contextmenu', _captureProxy);
+
+            proxyElem.addEventListener('mousemove', _captureProxy);
+            proxyElem.addEventListener('mouseup', _captureProxy);
+        }
+
+        document.captureElement = target;
+
+        // Track cursor and get initial cursor
+        _captureObserver.observe(target, {attributes: true});
+        _capturedElemChanged();
+
+        proxyElem.style.display = "";
+
+        // We listen to events on window in order to keep tracking if it
+        // happens to leave the viewport
+        window.addEventListener('mousemove', _captureProxy);
+        window.addEventListener('mouseup', _captureProxy);
+    }
+}
+
+export function releaseCapture() {
+    if (document.releaseCapture) {
+
+        document.releaseCapture();
+        document.captureElement = null;
+
+    } else {
+        if (!document.captureElement) {
+            return;
+        }
+
+        // There might be events already queued. The event proxy needs
+        // access to the captured element for these queued events.
+        // E.g. contextmenu (right-click) in Microsoft Edge
+        //
+        // Before removing the capturedElem pointer we save it to a
+        // temporary variable that the unflushed events can use.
+        _elementForUnflushedEvents = document.captureElement;
+        document.captureElement = null;
+
+        _captureObserver.disconnect();
+
+        const proxyElem = document.getElementById("noVNC_mouse_capture_elem");
+        proxyElem.style.display = "none";
+
+        window.removeEventListener('mousemove', _captureProxy);
+        window.removeEventListener('mouseup', _captureProxy);
+    }
+}

static/novnc/core/util/eventtarget.js

@@ -0,0 +1,35 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+export default class EventTargetMixin {
+    constructor() {
+        this._listeners = new Map();
+    }
+
+    addEventListener(type, callback) {
+        if (!this._listeners.has(type)) {
+            this._listeners.set(type, new Set());
+        }
+        this._listeners.get(type).add(callback);
+    }
+
+    removeEventListener(type, callback) {
+        if (this._listeners.has(type)) {
+            this._listeners.get(type).delete(callback);
+        }
+    }
+
+    dispatchEvent(event) {
+        if (!this._listeners.has(event.type)) {
+            return true;
+        }
+        this._listeners.get(event.type)
+            .forEach(callback => callback.call(this, event));
+        return !event.defaultPrevented;
+    }
+}

static/novnc/core/util/int.js

@@ -0,0 +1,15 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2020 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+export function toUnsigned32bit(toConvert) {
+    return toConvert >>> 0;
+}
+
+export function toSigned32bit(toConvert) {
+    return toConvert | 0;
+}

static/novnc/core/util/logging.js

@@ -0,0 +1,56 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+/*
+ * Logging/debug routines
+ */
+
+let _logLevel = 'warn';
+
+let Debug = () => {};
+let Info = () => {};
+let Warn = () => {};
+let Error = () => {};
+
+export function initLogging(level) {
+    if (typeof level === 'undefined') {
+        level = _logLevel;
+    } else {
+        _logLevel = level;
+    }
+
+    Debug = Info = Warn = Error = () => {};
+
+    if (typeof window.console !== "undefined") {
+        /* eslint-disable no-console, no-fallthrough */
+        switch (level) {
+            case 'debug':
+                Debug = console.debug.bind(window.console);
+            case 'info':
+                Info  = console.info.bind(window.console);
+            case 'warn':
+                Warn  = console.warn.bind(window.console);
+            case 'error':
+                Error = console.error.bind(window.console);
+            case 'none':
+                break;
+            default:
+                throw new window.Error("invalid logging type '" + level + "'");
+        }
+        /* eslint-enable no-console, no-fallthrough */
+    }
+}
+
+export function getLogging() {
+    return _logLevel;
+}
+
+export { Debug, Info, Warn, Error };
+
+// Initialize logging level
+initLogging();

static/novnc/core/util/strings.js

@@ -0,0 +1,28 @@
+/*
+ * noVNC: HTML5 VNC client
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * See README.md for usage and integration instructions.
+ */
+
+// Decode from UTF-8
+export function decodeUTF8(utf8string, allowLatin1=false) {
+    try {
+        return decodeURIComponent(escape(utf8string));
+    } catch (e) {
+        if (e instanceof URIError) {
+            if (allowLatin1) {
+                // If we allow Latin1 we can ignore any decoding fails
+                // and in these cases return the original string
+                return utf8string;
+            }
+        }
+        throw e;
+    }
+}
+
+// Encode to UTF-8
+export function encodeUTF8(DOMString) {
+    return unescape(encodeURIComponent(DOMString));
+}

static/novnc/core/websock.js

@@ -0,0 +1,353 @@
+/*
+ * Websock: high-performance buffering wrapper
+ * Copyright (C) 2019 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * Websock is similar to the standard WebSocket / RTCDataChannel object
+ * but with extra buffer handling.
+ *
+ * Websock has built-in receive queue buffering; the message event
+ * does not contain actual data but is simply a notification that
+ * there is new data available. Several rQ* methods are available to
+ * read binary data off of the receive queue.
+ */
+
+import * as Log from './util/logging.js';
+
+// this has performance issues in some versions Chromium, and
+// doesn't gain a tremendous amount of performance increase in Firefox
+// at the moment.  It may be valuable to turn it on in the future.
+const MAX_RQ_GROW_SIZE = 40 * 1024 * 1024;  // 40 MiB
+
+// Constants pulled from RTCDataChannelState enum
+// https://developer.mozilla.org/en-US/docs/Web/API/RTCDataChannel/readyState#RTCDataChannelState_enum
+const DataChannel = {
+    CONNECTING: "connecting",
+    OPEN: "open",
+    CLOSING: "closing",
+    CLOSED: "closed"
+};
+
+const ReadyStates = {
+    CONNECTING: [WebSocket.CONNECTING, DataChannel.CONNECTING],
+    OPEN: [WebSocket.OPEN, DataChannel.OPEN],
+    CLOSING: [WebSocket.CLOSING, DataChannel.CLOSING],
+    CLOSED: [WebSocket.CLOSED, DataChannel.CLOSED],
+};
+
+// Properties a raw channel must have, WebSocket and RTCDataChannel are two examples
+const rawChannelProps = [
+    "send",
+    "close",
+    "binaryType",
+    "onerror",
+    "onmessage",
+    "onopen",
+    "protocol",
+    "readyState",
+];
+
+export default class Websock {
+    constructor() {
+        this._websocket = null;  // WebSocket or RTCDataChannel object
+
+        this._rQi = 0;           // Receive queue index
+        this._rQlen = 0;         // Next write position in the receive queue
+        this._rQbufferSize = 1024 * 1024 * 4; // Receive queue buffer size (4 MiB)
+        // called in init: this._rQ = new Uint8Array(this._rQbufferSize);
+        this._rQ = null; // Receive queue
+
+        this._sQbufferSize = 1024 * 10;  // 10 KiB
+        // called in init: this._sQ = new Uint8Array(this._sQbufferSize);
+        this._sQlen = 0;
+        this._sQ = null;  // Send queue
+
+        this._eventHandlers = {
+            message: () => {},
+            open: () => {},
+            close: () => {},
+            error: () => {}
+        };
+    }
+
+    // Getters and Setters
+
+    get readyState() {
+        let subState;
+
+        if (this._websocket === null) {
+            return "unused";
+        }
+
+        subState = this._websocket.readyState;
+
+        if (ReadyStates.CONNECTING.includes(subState)) {
+            return "connecting";
+        } else if (ReadyStates.OPEN.includes(subState)) {
+            return "open";
+        } else if (ReadyStates.CLOSING.includes(subState)) {
+            return "closing";
+        } else if (ReadyStates.CLOSED.includes(subState)) {
+            return "closed";
+        }
+
+        return "unknown";
+    }
+
+    get sQ() {
+        return this._sQ;
+    }
+
+    get rQ() {
+        return this._rQ;
+    }
+
+    get rQi() {
+        return this._rQi;
+    }
+
+    set rQi(val) {
+        this._rQi = val;
+    }
+
+    // Receive Queue
+    get rQlen() {
+        return this._rQlen - this._rQi;
+    }
+
+    rQpeek8() {
+        return this._rQ[this._rQi];
+    }
+
+    rQskipBytes(bytes) {
+        this._rQi += bytes;
+    }
+
+    rQshift8() {
+        return this._rQshift(1);
+    }
+
+    rQshift16() {
+        return this._rQshift(2);
+    }
+
+    rQshift32() {
+        return this._rQshift(4);
+    }
+
+    // TODO(directxman12): test performance with these vs a DataView
+    _rQshift(bytes) {
+        let res = 0;
+        for (let byte = bytes - 1; byte >= 0; byte--) {
+            res += this._rQ[this._rQi++] << (byte * 8);
+        }
+        return res;
+    }
+
+    rQshiftStr(len) {
+        if (typeof(len) === 'undefined') { len = this.rQlen; }
+        let str = "";
+        // Handle large arrays in steps to avoid long strings on the stack
+        for (let i = 0; i < len; i += 4096) {
+            let part = this.rQshiftBytes(Math.min(4096, len - i));
+            str += String.fromCharCode.apply(null, part);
+        }
+        return str;
+    }
+
+    rQshiftBytes(len) {
+        if (typeof(len) === 'undefined') { len = this.rQlen; }
+        this._rQi += len;
+        return new Uint8Array(this._rQ.buffer, this._rQi - len, len);
+    }
+
+    rQshiftTo(target, len) {
+        if (len === undefined) { len = this.rQlen; }
+        // TODO: make this just use set with views when using a ArrayBuffer to store the rQ
+        target.set(new Uint8Array(this._rQ.buffer, this._rQi, len));
+        this._rQi += len;
+    }
+
+    rQslice(start, end = this.rQlen) {
+        return new Uint8Array(this._rQ.buffer, this._rQi + start, end - start);
+    }
+
+    // Check to see if we must wait for 'num' bytes (default to FBU.bytes)
+    // to be available in the receive queue. Return true if we need to
+    // wait (and possibly print a debug message), otherwise false.
+    rQwait(msg, num, goback) {
+        if (this.rQlen < num) {
+            if (goback) {
+                if (this._rQi < goback) {
+                    throw new Error("rQwait cannot backup " + goback + " bytes");
+                }
+                this._rQi -= goback;
+            }
+            return true; // true means need more data
+        }
+        return false;
+    }
+
+    // Send Queue
+
+    flush() {
+        if (this._sQlen > 0 && this.readyState === 'open') {
+            this._websocket.send(this._encodeMessage());
+            this._sQlen = 0;
+        }
+    }
+
+    send(arr) {
+        this._sQ.set(arr, this._sQlen);
+        this._sQlen += arr.length;
+        this.flush();
+    }
+
+    sendString(str) {
+        this.send(str.split('').map(chr => chr.charCodeAt(0)));
+    }
+
+    // Event Handlers
+    off(evt) {
+        this._eventHandlers[evt] = () => {};
+    }
+
+    on(evt, handler) {
+        this._eventHandlers[evt] = handler;
+    }
+
+    _allocateBuffers() {
+        this._rQ = new Uint8Array(this._rQbufferSize);
+        this._sQ = new Uint8Array(this._sQbufferSize);
+    }
+
+    init() {
+        this._allocateBuffers();
+        this._rQi = 0;
+        this._websocket = null;
+    }
+
+    open(uri, protocols) {
+        this.attach(new WebSocket(uri, protocols));
+    }
+
+    attach(rawChannel) {
+        this.init();
+
+        // Must get object and class methods to be compatible with the tests.
+        const channelProps = [...Object.keys(rawChannel), ...Object.getOwnPropertyNames(Object.getPrototypeOf(rawChannel))];
+        for (let i = 0; i < rawChannelProps.length; i++) {
+            const prop = rawChannelProps[i];
+            if (channelProps.indexOf(prop) < 0) {
+                throw new Error('Raw channel missing property: ' + prop);
+            }
+        }
+
+        this._websocket = rawChannel;
+        this._websocket.binaryType = "arraybuffer";
+        this._websocket.onmessage = this._recvMessage.bind(this);
+
+        this._websocket.onopen = () => {
+            Log.Debug('>> WebSock.onopen');
+            if (this._websocket.protocol) {
+                Log.Info("Server choose sub-protocol: " + this._websocket.protocol);
+            }
+
+            this._eventHandlers.open();
+            Log.Debug("<< WebSock.onopen");
+        };
+
+        this._websocket.onclose = (e) => {
+            Log.Debug(">> WebSock.onclose");
+            this._eventHandlers.close(e);
+            Log.Debug("<< WebSock.onclose");
+        };
+
+        this._websocket.onerror = (e) => {
+            Log.Debug(">> WebSock.onerror: " + e);
+            this._eventHandlers.error(e);
+            Log.Debug("<< WebSock.onerror: " + e);
+        };
+    }
+
+    close() {
+        if (this._websocket) {
+            if (this.readyState === 'connecting' ||
+                this.readyState === 'open') {
+                Log.Info("Closing WebSocket connection");
+                this._websocket.close();
+            }
+
+            this._websocket.onmessage = () => {};
+        }
+    }
+
+    // private methods
+    _encodeMessage() {
+        // Put in a binary arraybuffer
+        // according to the spec, you can send ArrayBufferViews with the send method
+        return new Uint8Array(this._sQ.buffer, 0, this._sQlen);
+    }
+
+    // We want to move all the unread data to the start of the queue,
+    // e.g. compacting.
+    // The function also expands the receive que if needed, and for
+    // performance reasons we combine these two actions to avoid
+    // unneccessary copying.
+    _expandCompactRQ(minFit) {
+        // if we're using less than 1/8th of the buffer even with the incoming bytes, compact in place
+        // instead of resizing
+        const requiredBufferSize =  (this._rQlen - this._rQi + minFit) * 8;
+        const resizeNeeded = this._rQbufferSize < requiredBufferSize;
+
+        if (resizeNeeded) {
+            // Make sure we always *at least* double the buffer size, and have at least space for 8x
+            // the current amount of data
+            this._rQbufferSize = Math.max(this._rQbufferSize * 2, requiredBufferSize);
+        }
+
+        // we don't want to grow unboundedly
+        if (this._rQbufferSize > MAX_RQ_GROW_SIZE) {
+            this._rQbufferSize = MAX_RQ_GROW_SIZE;
+            if (this._rQbufferSize - this.rQlen < minFit) {
+                throw new Error("Receive Queue buffer exceeded " + MAX_RQ_GROW_SIZE + " bytes, and the new message could not fit");
+            }
+        }
+
+        if (resizeNeeded) {
+            const oldRQbuffer = this._rQ.buffer;
+            this._rQ = new Uint8Array(this._rQbufferSize);
+            this._rQ.set(new Uint8Array(oldRQbuffer, this._rQi, this._rQlen - this._rQi));
+        } else {
+            this._rQ.copyWithin(0, this._rQi, this._rQlen);
+        }
+
+        this._rQlen = this._rQlen - this._rQi;
+        this._rQi = 0;
+    }
+
+    // push arraybuffer values onto the end of the receive que
+    _DecodeMessage(data) {
+        const u8 = new Uint8Array(data);
+        if (u8.length > this._rQbufferSize - this._rQlen) {
+            this._expandCompactRQ(u8.length);
+        }
+        this._rQ.set(u8, this._rQlen);
+        this._rQlen += u8.length;
+    }
+
+    _recvMessage(e) {
+        this._DecodeMessage(e.data);
+        if (this.rQlen > 0) {
+            this._eventHandlers.message();
+            if (this._rQlen == this._rQi) {
+                // All data has now been processed, this means we
+                // can reset the receive queue.
+                this._rQlen = 0;
+                this._rQi = 0;
+            }
+        } else {
+            Log.Debug("Ignoring empty message");
+        }
+    }
+}

static/novnc/utils/b64-to-binary.pl

@@ -0,0 +1,17 @@
+#!/usr/bin/perl
+use MIME::Base64;
+
+for (<>) {
+    unless (/^'([{}])(\d+)\1(.+?)',$/) {
+        print;
+        next;
+    }
+
+    my ($dir, $amt, $b64) = ($1, $2, $3);
+
+    my $decoded = MIME::Base64::decode($b64) or die "Could not base64-decode line `$_`";
+
+    my $decoded_escaped = join "", map { "\\x$_" } unpack("(H2)*", $decoded);
+
+    print "'${dir}${amt}${dir}${decoded_escaped}',\n";
+}

static/novnc/utils/genkeysymdef.js

@@ -0,0 +1,127 @@
+#!/usr/bin/env node
+/*
+ * genkeysymdef: X11 keysymdef.h to JavaScript converter
+ * Copyright (C) 2018 The noVNC Authors
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ */
+
+"use strict";
+
+const fs = require('fs');
+
+let showHelp = process.argv.length === 2;
+let filename;
+
+for (let i = 2; i < process.argv.length; ++i) {
+    switch (process.argv[i]) {
+        case "--help":
+        case "-h":
+            showHelp = true;
+            break;
+        case "--file":
+        case "-f":
+        default:
+            filename = process.argv[i];
+    }
+}
+
+if (!filename) {
+    showHelp = true;
+    console.log("Error: No filename specified\n");
+}
+
+if (showHelp) {
+    console.log("Parses a *nix keysymdef.h to generate Unicode code point mappings");
+    console.log("Usage: node parse.js [options] filename:");
+    console.log("  -h [ --help ]                 Produce this help message");
+    console.log("  filename                      The keysymdef.h file to parse");
+    process.exit(0);
+}
+
+const buf = fs.readFileSync(filename);
+const str = buf.toString('utf8');
+
+const re = /^#define XK_([a-zA-Z_0-9]+)\s+0x([0-9a-fA-F]+)\s*(\/\*\s*(.*)\s*\*\/)?\s*$/m;
+
+const arr = str.split('\n');
+
+const codepoints = {};
+
+for (let i = 0; i < arr.length; ++i) {
+    const result = re.exec(arr[i]);
+    if (result) {
+        const keyname = result[1];
+        const keysym = parseInt(result[2], 16);
+        const remainder = result[3];
+
+        const unicodeRes = /U\+([0-9a-fA-F]+)/.exec(remainder);
+        if (unicodeRes) {
+            const unicode = parseInt(unicodeRes[1], 16);
+            // The first entry is the preferred one
+            if (!codepoints[unicode]) {
+                codepoints[unicode] = { keysym: keysym, name: keyname };
+            }
+        }
+    }
+}
+
+let out =
+"/*\n" +
+" * Mapping from Unicode codepoints to X11/RFB keysyms\n" +
+" *\n" +
+" * This file was automatically generated from keysymdef.h\n" +
+" * DO NOT EDIT!\n" +
+" */\n" +
+"\n" +
+"/* Functions at the bottom */\n" +
+"\n" +
+"const codepoints = {\n";
+
+function toHex(num) {
+    let s = num.toString(16);
+    if (s.length < 4) {
+        s = ("0000" + s).slice(-4);
+    }
+    return "0x" + s;
+}
+
+for (let codepoint in codepoints) {
+    codepoint = parseInt(codepoint);
+
+    // Latin-1?
+    if ((codepoint >= 0x20) && (codepoint <= 0xff)) {
+        continue;
+    }
+
+    // Handled by the general Unicode mapping?
+    if ((codepoint | 0x01000000) === codepoints[codepoint].keysym) {
+        continue;
+    }
+
+    out += "    " + toHex(codepoint) + ": " +
+           toHex(codepoints[codepoint].keysym) +
+           ", // XK_" + codepoints[codepoint].name + "\n";
+}
+
+out +=
+"};\n" +
+"\n" +
+"export default {\n" +
+"    lookup(u) {\n" +
+"        // Latin-1 is one-to-one mapping\n" +
+"        if ((u >= 0x20) && (u <= 0xff)) {\n" +
+"            return u;\n" +
+"        }\n" +
+"\n" +
+"        // Lookup table (fairly random)\n" +
+"        const keysym = codepoints[u];\n" +
+"        if (keysym !== undefined) {\n" +
+"            return keysym;\n" +
+"        }\n" +
+"\n" +
+"        // General mapping as final fallback\n" +
+"        return 0x01000000 | u;\n" +
+"    },\n" +
+"};";
+
+console.log(out);

static/novnc/utils/novnc_proxy

@@ -0,0 +1,198 @@
+#!/usr/bin/env bash
+
+# Copyright (C) 2018 The noVNC Authors
+# Licensed under MPL 2.0 or any later version (see LICENSE.txt)
+
+usage() {
+    if [ "$*" ]; then
+        echo "$*"
+        echo
+    fi
+    echo "Usage: ${NAME} [--listen PORT] [--vnc VNC_HOST:PORT] [--cert CERT] [--ssl-only]"
+    echo
+    echo "Starts the WebSockets proxy and a mini-webserver and "
+    echo "provides a cut-and-paste URL to go to."
+    echo
+    echo "    --listen PORT         Port for proxy/webserver to listen on"
+    echo "                          Default: 6080"
+    echo "    --vnc VNC_HOST:PORT   VNC server host:port proxy target"
+    echo "                          Default: localhost:5900"
+    echo "    --cert CERT           Path to combined cert/key file, or just"
+    echo "                          the cert file if used with --key"
+    echo "                          Default: self.pem"
+    echo "    --key KEY             Path to key file, when not combined with cert"
+    echo "    --web WEB             Path to web files (e.g. vnc.html)"
+    echo "                          Default: ./"
+    echo "    --ssl-only            Disable non-https connections."
+    echo "                                    "
+    echo "    --record FILE         Record traffic to FILE.session.js"
+    echo "                                    "
+    echo "    --syslog SERVER       Can be local socket such as /dev/log, or a UDP host:port pair."
+    echo "                                    "
+    echo "    --heartbeat SEC       send a ping to the client every SEC seconds"
+    echo "    --timeout SEC         after SEC seconds exit when not connected"
+    echo "    --idle-timeout SEC    server exits after SEC seconds if there are no"
+    echo "                          active connections"
+    echo "                                    "
+    exit 2
+}
+
+NAME="$(basename $0)"
+REAL_NAME="$(readlink -f $0)"
+HERE="$(cd "$(dirname "$REAL_NAME")" && pwd)"
+PORT="6080"
+VNC_DEST="localhost:5900"
+CERT=""
+KEY=""
+WEB=""
+proxy_pid=""
+SSLONLY=""
+RECORD_ARG=""
+SYSLOG_ARG=""
+HEARTBEAT_ARG=""
+IDLETIMEOUT_ARG=""
+TIMEOUT_ARG=""
+
+die() {
+    echo "$*"
+    exit 1
+}
+
+cleanup() {
+    trap - TERM QUIT INT EXIT
+    trap "true" CHLD   # Ignore cleanup messages
+    echo
+    if [ -n "${proxy_pid}" ]; then
+        echo "Terminating WebSockets proxy (${proxy_pid})"
+        kill ${proxy_pid}
+    fi
+}
+
+# Process Arguments
+
+# Arguments that only apply to chrooter itself
+while [ "$*" ]; do
+    param=$1; shift; OPTARG=$1
+    case $param in
+    --listen)  PORT="${OPTARG}"; shift            ;;
+    --vnc)     VNC_DEST="${OPTARG}"; shift        ;;
+    --cert)    CERT="${OPTARG}"; shift            ;;
+    --key)     KEY="${OPTARG}"; shift             ;;
+    --web)     WEB="${OPTARG}"; shift            ;;
+    --ssl-only) SSLONLY="--ssl-only"             ;;
+    --record) RECORD_ARG="--record ${OPTARG}"; shift ;;
+    --syslog) SYSLOG_ARG="--syslog ${OPTARG}"; shift ;;
+    --heartbeat) HEARTBEAT_ARG="--heartbeat ${OPTARG}"; shift ;;
+    --idle-timeout) IDLETIMEOUT_ARG="--idle-timeout ${OPTARG}"; shift ;;
+    --timeout) TIMEOUT_ARG="--timeout ${OPTARG}"; shift ;;
+    -h|--help) usage                              ;;
+    -*) usage "Unknown chrooter option: ${param}" ;;
+    *) break                                      ;;
+    esac
+done
+
+# Sanity checks
+if bash -c "exec 7<>/dev/tcp/localhost/${PORT}" &> /dev/null; then
+    exec 7<&-
+    exec 7>&-
+    die "Port ${PORT} in use. Try --listen PORT"
+else
+    exec 7<&-
+    exec 7>&-
+fi
+
+trap "cleanup" TERM QUIT INT EXIT
+
+# Find vnc.html
+if [ -n "${WEB}" ]; then
+    if [ ! -e "${WEB}/vnc.html" ]; then
+        die "Could not find ${WEB}/vnc.html"
+    fi
+elif [ -e "$(pwd)/vnc.html" ]; then
+    WEB=$(pwd)
+elif [ -e "${HERE}/../vnc.html" ]; then
+    WEB=${HERE}/../
+elif [ -e "${HERE}/vnc.html" ]; then
+    WEB=${HERE}
+elif [ -e "${HERE}/../share/novnc/vnc.html" ]; then
+    WEB=${HERE}/../share/novnc/
+else
+    die "Could not find vnc.html"
+fi
+
+# Find self.pem
+if [ -n "${CERT}" ]; then
+    if [ ! -e "${CERT}" ]; then
+        die "Could not find ${CERT}"
+    fi
+elif [ -e "$(pwd)/self.pem" ]; then
+    CERT="$(pwd)/self.pem"
+elif [ -e "${HERE}/../self.pem" ]; then
+    CERT="${HERE}/../self.pem"
+elif [ -e "${HERE}/self.pem" ]; then
+    CERT="${HERE}/self.pem"
+else
+    echo "Warning: could not find self.pem"
+fi
+
+# Check key file
+if [ -n "${KEY}" ]; then
+    if [ ! -e "${KEY}" ]; then
+        die "Could not find ${KEY}"
+    fi
+fi
+
+# try to find websockify (prefer local, try global, then download local)
+if [[ -d ${HERE}/websockify ]]; then
+    WEBSOCKIFY=${HERE}/websockify/run
+
+    if [[ ! -x $WEBSOCKIFY ]]; then
+        echo "The path ${HERE}/websockify exists, but $WEBSOCKIFY either does not exist or is not executable."
+        echo "If you intended to use an installed websockify package, please remove ${HERE}/websockify."
+        exit 1
+    fi
+
+    echo "Using local websockify at $WEBSOCKIFY"
+else
+    WEBSOCKIFY_FROMSYSTEM=$(which websockify 2>/dev/null)
+    WEBSOCKIFY_FROMSNAP=${HERE}/../usr/bin/python2-websockify
+    [ -f $WEBSOCKIFY_FROMSYSTEM ] && WEBSOCKIFY=$WEBSOCKIFY_FROMSYSTEM
+    [ -f $WEBSOCKIFY_FROMSNAP ] && WEBSOCKIFY=$WEBSOCKIFY_FROMSNAP
+
+    if [ ! -f "$WEBSOCKIFY" ]; then
+        echo "No installed websockify, attempting to clone websockify..."
+        WEBSOCKIFY=${HERE}/websockify/run
+        git clone https://github.com/novnc/websockify ${HERE}/websockify
+
+        if [[ ! -e $WEBSOCKIFY ]]; then
+            echo "Unable to locate ${HERE}/websockify/run after downloading"
+            exit 1
+        fi
+
+        echo "Using local websockify at $WEBSOCKIFY"
+    else
+        echo "Using installed websockify at $WEBSOCKIFY"
+    fi
+fi
+
+echo "Starting webserver and WebSockets proxy on port ${PORT}"
+#${HERE}/websockify --web ${WEB} ${CERT:+--cert ${CERT}} ${PORT} ${VNC_DEST} &
+${WEBSOCKIFY} ${SYSLOG_ARG} ${SSLONLY} --web ${WEB} ${CERT:+--cert ${CERT}} ${KEY:+--key ${KEY}} ${PORT} ${VNC_DEST} ${HEARTBEAT_ARG} ${IDLETIMEOUT_ARG} ${RECORD_ARG} ${TIMEOUT_ARG} &
+proxy_pid="$!"
+sleep 1
+if ! ps -p ${proxy_pid} >/dev/null; then
+    proxy_pid=
+    echo "Failed to start WebSockets proxy"
+    exit 1
+fi
+
+echo -e "\n\nNavigate to this URL:\n"
+if [ "x$SSLONLY" == "x" ]; then
+    echo -e "    http://$(hostname):${PORT}/vnc.html?host=$(hostname)&port=${PORT}\n"
+else
+    echo -e "    https://$(hostname):${PORT}/vnc.html?host=$(hostname)&port=${PORT}\n"
+fi
+
+echo -e "Press Ctrl-C to exit\n\n"
+
+wait ${proxy_pid}