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noVNC/app/ui.js
Solly Ross adfc9d3f54 Move error handler into separate file 
This commit moves the global error handler into a separate file,
so that it can catch module loading errors.

This also adds support for properly displaying error messages with
newlines in them (since the module loader may throw those)
2017-03-21 17:39:07 -04:00

1721 lines
57 KiB
JavaScript
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/*
* noVNC: HTML5 VNC client
* Copyright (C) 2012 Joel Martin
* Copyright (C) 2016 Samuel Mannehed for Cendio AB
* Copyright (C) 2016 Pierre Ossman for Cendio AB
* Licensed under MPL 2.0 (see LICENSE.txt)
*
* See README.md for usage and integration instructions.
*/
/* jslint white: false, browser: true */
/* global window, document.getElementById, Util, WebUtil, RFB, Display */
import * as Log from '../core/util/logging.js';
import _, { l10n } from '../core/util/localization.js'
import { isTouchDevice, browserSupportsCursorURIs as cursorURIsSupported } from '../core/util/browsers.js';
import { setCapture, getPointerEvent } from '../core/util/events.js';
import KeyTable from "../core/input/keysym.js";
import keysyms from "../core/input/keysymdef.js";
import RFB from "../core/rfb.js";
import Display from "../core/display.js";
import * as WebUtil from "./webutil.js";
const UI = {
connected: false,
desktopName: "",
resizeTimeout: null,
statusTimeout: null,
hideKeyboardTimeout: null,
idleControlbarTimeout: null,
closeControlbarTimeout: null,
controlbarGrabbed: false,
controlbarDrag: false,
controlbarMouseDownClientY: 0,
controlbarMouseDownOffsetY: 0,
isSafari: false,
rememberedClipSetting: null,
lastKeyboardinput: null,
defaultKeyboardinputLen: 100,
inhibit_reconnect: true,
reconnect_callback: null,
reconnect_password: null,
prime: function(callback) {
if (document.readyState === "interactive" || document.readyState === "complete") {
UI.load(callback);
} else {
document.addEventListener('DOMContentLoaded', UI.load.bind(UI, callback));
}
},
// Setup rfb object, load settings from browser storage, then call
// UI.init to setup the UI/menus
load: function(callback) {
WebUtil.initSettings(UI.start, callback);
},
// Render default UI and initialize settings menu
start: function(callback) {
// Setup global variables first
UI.isSafari = (navigator.userAgent.indexOf('Safari') !== -1 &&
navigator.userAgent.indexOf('Chrome') === -1);
UI.initSettings();
// Translate the DOM
l10n.translateDOM();
// Adapt the interface for touch screen devices
if (isTouchDevice) {
document.documentElement.classList.add("noVNC_touch");
// Remove the address bar
setTimeout(function() { window.scrollTo(0, 1); }, 100);
}
// Restore control bar position
if (WebUtil.readSetting('controlbar_pos') === 'right') {
UI.toggleControlbarSide();
}
UI.initFullscreen();
// Setup event handlers
UI.addResizeHandlers();
UI.addControlbarHandlers();
UI.addTouchSpecificHandlers();
UI.addExtraKeysHandlers();
UI.addXvpHandlers();
UI.addConnectionControlHandlers();
UI.addClipboardHandlers();
UI.addSettingsHandlers();
document.getElementById("noVNC_status")
.addEventListener('click', UI.hideStatus);
UI.openControlbar();
// Show the connect panel on first load unless autoconnecting
if (!autoconnect) {
UI.openConnectPanel();
}
UI.updateViewClip();
UI.updateVisualState();
document.getElementById('noVNC_setting_host').focus();
document.documentElement.classList.remove("noVNC_loading");
var autoconnect = WebUtil.getConfigVar('autoconnect', false);
if (autoconnect === 'true' || autoconnect == '1') {
autoconnect = true;
UI.connect();
} else {
autoconnect = false;
}
if (typeof callback === "function") {
callback(UI.rfb);
}
},
initFullscreen: function() {
// Only show the button if fullscreen is properly supported
// * Safari doesn't support alphanumerical input while in fullscreen
if (!UI.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: function() {
var i;
// Logging selection dropdown
var llevels = ['error', 'warn', 'info', 'debug'];
for (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
var 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('true_color', true);
UI.initSetting('cursor', !isTouchDevice);
UI.initSetting('clip', false);
UI.initSetting('resize', 'off');
UI.initSetting('shared', true);
UI.initSetting('view_only', 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: function() {
var labels = document.getElementsByTagName('LABEL');
for (var i = 0; i < labels.length; i++) {
var htmlFor = labels[i].htmlFor;
if (htmlFor != '') {
var elem = document.getElementById(htmlFor);
if (elem) elem.label = labels[i];
} else {
// If 'for' isn't set, use the first input element child
var children = labels[i].children;
for (var j = 0; j < children.length; j++) {
if (children[j].form !== undefined) {
children[j].label = labels[i];
break;
}
}
}
}
},
initRFB: function() {
try {
UI.rfb = new RFB({'target': document.getElementById('noVNC_canvas'),
'onNotification': UI.notification,
'onUpdateState': UI.updateState,
'onDisconnected': UI.disconnectFinished,
'onPasswordRequired': UI.passwordRequired,
'onXvpInit': UI.updateXvpButton,
'onClipboard': UI.clipboardReceive,
'onBell': UI.bell,
'onFBUComplete': UI.initialResize,
'onFBResize': UI.updateSessionSize,
'onDesktopName': UI.updateDesktopName});
return true;
} catch (exc) {
var msg = "Unable to create RFB client -- " + exc;
Log.Error(msg);
UI.showStatus(msg, 'error');
return false;
}
},
/* ------^-------
* /INIT
* ==============
* EVENT HANDLERS
* ------v------*/
addResizeHandlers: function() {
window.addEventListener('resize', UI.applyResizeMode);
window.addEventListener('resize', UI.updateViewClip);
},
addControlbarHandlers: function() {
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('keypress', UI.activateControlbar);
document.getElementById("noVNC_control_bar")
.addEventListener('mousedown', UI.keepControlbar);
document.getElementById("noVNC_control_bar")
.addEventListener('keypress', 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);
var exps = document.getElementsByClassName("noVNC_expander");
for (var i = 0;i < exps.length;i++) {
exps[i].addEventListener('click', UI.toggleExpander);
}
},
addTouchSpecificHandlers: function() {
document.getElementById("noVNC_mouse_button0")
.addEventListener('click', function () { UI.setMouseButton(1); });
document.getElementById("noVNC_mouse_button1")
.addEventListener('click', function () { UI.setMouseButton(2); });
document.getElementById("noVNC_mouse_button2")
.addEventListener('click', function () { UI.setMouseButton(4); });
document.getElementById("noVNC_mouse_button4")
.addEventListener('click', function () { UI.setMouseButton(0); });
document.getElementById("noVNC_keyboard_button")
.addEventListener('click', UI.toggleVirtualKeyboard);
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', function () { return 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);
window.addEventListener('load', UI.keyboardinputReset);
},
addExtraKeysHandlers: function() {
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_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);
},
addXvpHandlers: function() {
document.getElementById("noVNC_xvp_shutdown_button")
.addEventListener('click', function() { UI.rfb.xvpShutdown(); });
document.getElementById("noVNC_xvp_reboot_button")
.addEventListener('click', function() { UI.rfb.xvpReboot(); });
document.getElementById("noVNC_xvp_reset_button")
.addEventListener('click', function() { UI.rfb.xvpReset(); });
document.getElementById("noVNC_xvp_button")
.addEventListener('click', UI.toggleXvpPanel);
},
addConnectionControlHandlers: function() {
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_password_button")
.addEventListener('click', UI.setPassword);
},
addClipboardHandlers: function() {
document.getElementById("noVNC_clipboard_button")
.addEventListener('click', UI.toggleClipboardPanel);
document.getElementById("noVNC_clipboard_text")
.addEventListener('focus', UI.displayBlur);
document.getElementById("noVNC_clipboard_text")
.addEventListener('blur', UI.displayFocus);
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: function(name, changeFunc) {
var settingElem = document.getElementById("noVNC_setting_" + name);
if (changeFunc === undefined) {
changeFunc = function () { UI.saveSetting(name); };
}
settingElem.addEventListener('change', changeFunc);
},
addSettingsHandlers: function() {
document.getElementById("noVNC_settings_button")
.addEventListener('click', UI.toggleSettingsPanel);
UI.addSettingChangeHandler('encrypt');
UI.addSettingChangeHandler('true_color');
UI.addSettingChangeHandler('cursor');
UI.addSettingChangeHandler('cursor', UI.updateLocalCursor);
UI.addSettingChangeHandler('resize');
UI.addSettingChangeHandler('resize', UI.enableDisableViewClip);
UI.addSettingChangeHandler('resize', UI.applyResizeMode);
UI.addSettingChangeHandler('clip');
UI.addSettingChangeHandler('clip', UI.updateViewClip);
UI.addSettingChangeHandler('shared');
UI.addSettingChangeHandler('view_only');
UI.addSettingChangeHandler('view_only', UI.updateViewOnly);
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: function() {
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------*/
updateState: function(rfb, state, oldstate) {
var msg;
document.documentElement.classList.remove("noVNC_connecting");
document.documentElement.classList.remove("noVNC_connected");
document.documentElement.classList.remove("noVNC_disconnecting");
document.documentElement.classList.remove("noVNC_reconnecting");
switch (state) {
case 'connecting':
document.getElementById("noVNC_transition_text").textContent = _("Connecting...");
document.documentElement.classList.add("noVNC_connecting");
break;
case 'connected':
UI.connected = true;
UI.inhibit_reconnect = false;
document.documentElement.classList.add("noVNC_connected");
if (rfb && rfb.get_encrypt()) {
msg = _("Connected (encrypted) to ") + UI.desktopName;
} else {
msg = _("Connected (unencrypted) to ") + UI.desktopName;
}
UI.showStatus(msg);
break;
case 'disconnecting':
UI.connected = false;
document.getElementById("noVNC_transition_text").textContent = _("Disconnecting...");
document.documentElement.classList.add("noVNC_disconnecting");
break;
case 'disconnected':
UI.showStatus(_("Disconnected"));
break;
default:
msg = "Invalid UI state";
Log.Error(msg);
UI.showStatus(msg, 'error');
break;
}
UI.updateVisualState();
},
// Disable/enable controls depending on connection state
updateVisualState: function() {
//Log.Debug(">> updateVisualState");
UI.enableDisableViewClip();
if (cursorURIsSupported() && !isTouchDevice) {
UI.enableSetting('cursor');
} else {
UI.disableSetting('cursor');
}
if (UI.connected) {
UI.disableSetting('encrypt');
UI.disableSetting('true_color');
UI.disableSetting('shared');
UI.disableSetting('host');
UI.disableSetting('port');
UI.disableSetting('path');
UI.disableSetting('repeaterID');
UI.updateViewClip();
UI.setMouseButton(1);
// Hide the controlbar after 2 seconds
UI.closeControlbarTimeout = setTimeout(UI.closeControlbar, 2000);
} else {
UI.enableSetting('encrypt');
UI.enableSetting('true_color');
UI.enableSetting('shared');
UI.enableSetting('host');
UI.enableSetting('port');
UI.enableSetting('path');
UI.enableSetting('repeaterID');
UI.updateXvpButton(0);
UI.keepControlbar();
}
// Hide input related buttons in view only mode
if (UI.rfb && UI.rfb.get_view_only()) {
document.getElementById('noVNC_keyboard_button')
.classList.add('noVNC_hidden');
document.getElementById('noVNC_toggle_extra_keys_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');
}
// State change disables viewport dragging.
// It is enabled (toggled) by direct click on the button
UI.setViewDrag(false);
// State change also closes the password dialog
document.getElementById('noVNC_password_dlg')
.classList.remove('noVNC_open');
//Log.Debug("<< updateVisualState");
},
showStatus: function(text, status_type, time) {
var statusElem = document.getElementById('noVNC_status');
clearTimeout(UI.statusTimeout);
if (typeof status_type === 'undefined') {
status_type = 'normal';
}
statusElem.classList.remove("noVNC_status_normal");
statusElem.classList.remove("noVNC_status_warn");
statusElem.classList.remove("noVNC_status_error");
switch (status_type) {
case 'warning':
case 'warn':
statusElem.classList.add("noVNC_status_warn");
break;
case 'error':
statusElem.classList.add("noVNC_status_error");
break;
case 'normal':
case 'info':
default:
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 (status_type !== 'error') {
UI.statusTimeout = window.setTimeout(UI.hideStatus, time);
}
},
hideStatus: function() {
clearTimeout(UI.statusTimeout);
document.getElementById('noVNC_status').classList.remove("noVNC_open");
},
notification: function (rfb, msg, level, options) {
UI.showStatus(msg, level);
},
activateControlbar: function(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: function() {
document.getElementById('noVNC_control_bar_anchor')
.classList.add("noVNC_idle");
},
keepControlbar: function() {
clearTimeout(UI.closeControlbarTimeout);
},
openControlbar: function() {
document.getElementById('noVNC_control_bar')
.classList.add("noVNC_open");
},
closeControlbar: function() {
UI.closeAllPanels();
document.getElementById('noVNC_control_bar')
.classList.remove("noVNC_open");
},
toggleControlbar: function() {
if (document.getElementById('noVNC_control_bar')
.classList.contains("noVNC_open")) {
UI.closeControlbar();
} else {
UI.openControlbar();
}
},
toggleControlbarSide: function () {
// Temporarily disable animation to avoid weird movement
var bar = document.getElementById('noVNC_control_bar');
bar.style.transitionDuration = '0s';
bar.addEventListener('transitionend', function () { this.style.transitionDuration = ""; });
var 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;
},
dragControlbarHandle: function (e) {
if (!UI.controlbarGrabbed) return;
var ptr = getPointerEvent(e);
var 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) {
// The goal is to trigger on a certain physical width, the
// devicePixelRatio brings us a bit closer but is not optimal.
var dragThreshold = 10 * (window.devicePixelRatio || 1);
var dragDistance = Math.abs(ptr.clientY - UI.controlbarMouseDownClientY);
if (dragDistance < dragThreshold) return;
UI.controlbarDrag = true;
}
var 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: function (viewportRelativeY) {
var handle = document.getElementById("noVNC_control_bar_handle");
var handleHeight = handle.getBoundingClientRect().height;
var controlbarBounds = document.getElementById("noVNC_control_bar")
.getBoundingClientRect();
var margin = 10;
// These heights need to be non-zero for the below logic to work
if (handleHeight === 0 || controlbarBounds.height === 0) {
return;
}
var 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
var parentRelativeY = newY - controlbarBounds.top;
handle.style.transform = "translateY(" + parentRelativeY + "px)";
},
updateControlbarHandle: function () {
// Since the control bar is fixed on the viewport and not the page,
// the move function expects coordinates relative the the viewport.
var handle = document.getElementById("noVNC_control_bar_handle");
var handleBounds = handle.getBoundingClientRect();
UI.moveControlbarHandle(handleBounds.top);
},
controlbarHandleMouseUp: function(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;
},
controlbarHandleMouseDown: function(e) {
if ((e.type == "mousedown") && (e.button != 0)) return;
var ptr = getPointerEvent(e);
var handle = document.getElementById("noVNC_control_bar_handle");
var bounds = handle.getBoundingClientRect();
setCapture(handle);
UI.controlbarGrabbed = true;
UI.controlbarDrag = false;
UI.controlbarMouseDownClientY = ptr.clientY;
UI.controlbarMouseDownOffsetY = ptr.clientY - bounds.top;
e.preventDefault();
e.stopPropagation();
UI.keepControlbar();
UI.activateControlbar();
},
toggleExpander: function(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: function(name, defVal) {
// Check Query string followed by cookie
var val = WebUtil.getConfigVar(name);
if (val === null) {
val = WebUtil.readSetting(name, defVal);
}
UI.updateSetting(name, val);
return val;
},
// Update cookie and form control setting. If value is not set, then
// updates from control to current cookie setting.
updateSetting: function(name, value) {
// Save the cookie for this session
if (typeof value !== 'undefined') {
WebUtil.writeSetting(name, value);
}
// Update the settings control
value = UI.getSetting(name);
var ctrl = document.getElementById('noVNC_setting_' + name);
if (ctrl.type === 'checkbox') {
ctrl.checked = value;
} else if (typeof ctrl.options !== 'undefined') {
for (var i = 0; i < ctrl.options.length; i += 1) {
if (ctrl.options[i].value === value) {
ctrl.selectedIndex = i;
break;
}
}
} else {
/*Weird IE9 error leads to 'null' appearring
in textboxes instead of ''.*/
if (value === null) {
value = "";
}
ctrl.value = value;
}
},
// Save control setting to cookie
saveSetting: function(name) {
var val, ctrl = document.getElementById('noVNC_setting_' + name);
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: function(name) {
var ctrl = document.getElementById('noVNC_setting_' + name);
var 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: function(name) {
var ctrl = document.getElementById('noVNC_setting_' + name);
ctrl.disabled = true;
ctrl.label.classList.add('noVNC_disabled');
},
enableSetting: function(name) {
var ctrl = document.getElementById('noVNC_setting_' + name);
ctrl.disabled = false;
ctrl.label.classList.remove('noVNC_disabled');
},
/* ------^-------
* /SETTINGS
* ==============
* PANELS
* ------v------*/
closeAllPanels: function() {
UI.closeSettingsPanel();
UI.closeXvpPanel();
UI.closeClipboardPanel();
UI.closeExtraKeys();
},
/* ------^-------
* /PANELS
* ==============
* SETTINGS (panel)
* ------v------*/
openSettingsPanel: function() {
UI.closeAllPanels();
UI.openControlbar();
// Refresh UI elements from saved cookies
UI.updateSetting('encrypt');
UI.updateSetting('true_color');
if (cursorURIsSupported()) {
UI.updateSetting('cursor');
} else {
UI.updateSetting('cursor', !isTouchDevice);
UI.disableSetting('cursor');
}
UI.updateSetting('clip');
UI.updateSetting('resize');
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: function() {
document.getElementById('noVNC_settings')
.classList.remove("noVNC_open");
document.getElementById('noVNC_settings_button')
.classList.remove("noVNC_selected");
},
toggleSettingsPanel: function() {
if (document.getElementById('noVNC_settings')
.classList.contains("noVNC_open")) {
UI.closeSettingsPanel();
} else {
UI.openSettingsPanel();
}
},
/* ------^-------
* /SETTINGS
* ==============
* XVP
* ------v------*/
openXvpPanel: function() {
UI.closeAllPanels();
UI.openControlbar();
document.getElementById('noVNC_xvp')
.classList.add("noVNC_open");
document.getElementById('noVNC_xvp_button')
.classList.add("noVNC_selected");
},
closeXvpPanel: function() {
document.getElementById('noVNC_xvp')
.classList.remove("noVNC_open");
document.getElementById('noVNC_xvp_button')
.classList.remove("noVNC_selected");
},
toggleXvpPanel: function() {
if (document.getElementById('noVNC_xvp')
.classList.contains("noVNC_open")) {
UI.closeXvpPanel();
} else {
UI.openXvpPanel();
}
},
// Disable/enable XVP button
updateXvpButton: function(ver) {
if (ver >= 1 && !UI.rfb.get_view_only()) {
document.getElementById('noVNC_xvp_button')
.classList.remove("noVNC_hidden");
} else {
document.getElementById('noVNC_xvp_button')
.classList.add("noVNC_hidden");
// Close XVP panel if open
UI.closeXvpPanel();
}
},
/* ------^-------
* /XVP
* ==============
* CLIPBOARD
* ------v------*/
openClipboardPanel: function() {
UI.closeAllPanels();
UI.openControlbar();
document.getElementById('noVNC_clipboard')
.classList.add("noVNC_open");
document.getElementById('noVNC_clipboard_button')
.classList.add("noVNC_selected");
},
closeClipboardPanel: function() {
document.getElementById('noVNC_clipboard')
.classList.remove("noVNC_open");
document.getElementById('noVNC_clipboard_button')
.classList.remove("noVNC_selected");
},
toggleClipboardPanel: function() {
if (document.getElementById('noVNC_clipboard')
.classList.contains("noVNC_open")) {
UI.closeClipboardPanel();
} else {
UI.openClipboardPanel();
}
},
clipboardReceive: function(rfb, text) {
Log.Debug(">> UI.clipboardReceive: " + text.substr(0,40) + "...");
document.getElementById('noVNC_clipboard_text').value = text;
Log.Debug("<< UI.clipboardReceive");
},
clipboardClear: function() {
document.getElementById('noVNC_clipboard_text').value = "";
UI.rfb.clipboardPasteFrom("");
},
clipboardSend: function() {
var 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: function() {
document.getElementById('noVNC_connect_dlg')
.classList.add("noVNC_open");
},
closeConnectPanel: function() {
document.getElementById('noVNC_connect_dlg')
.classList.remove("noVNC_open");
},
connect: function(event, password) {
var host = UI.getSetting('host');
var port = UI.getSetting('port');
var path = UI.getSetting('path');
if (typeof password === 'undefined') {
password = WebUtil.getConfigVar('password');
}
if (password === null) {
password = undefined;
}
if ((!host) || (!port)) {
var msg = _("Must set host and port");
Log.Error(msg);
UI.showStatus(msg, 'error');
return;
}
if (!UI.initRFB()) return;
UI.closeAllPanels();
UI.closeConnectPanel();
UI.rfb.set_encrypt(UI.getSetting('encrypt'));
UI.rfb.set_true_color(UI.getSetting('true_color'));
UI.rfb.set_shared(UI.getSetting('shared'));
UI.rfb.set_repeaterID(UI.getSetting('repeaterID'));
UI.updateLocalCursor();
UI.updateViewOnly();
UI.rfb.connect(host, port, password, path);
},
disconnect: function() {
UI.closeAllPanels();
UI.rfb.disconnect();
// Disable automatic reconnecting
UI.inhibit_reconnect = true;
// Restore the callback used for initial resize
UI.rfb.set_onFBUComplete(UI.initialResize);
// Don't display the connection settings until we're actually disconnected
},
reconnect: function() {
UI.reconnect_callback = null;
// if reconnect has been disabled in the meantime, do nothing.
if (UI.inhibit_reconnect) {
return;
}
UI.connect(null, UI.reconnect_password);
},
disconnectFinished: function (rfb, reason) {
if (typeof reason !== 'undefined') {
UI.showStatus(reason, 'error');
} else if (UI.getSetting('reconnect', false) === true && !UI.inhibit_reconnect) {
document.getElementById("noVNC_transition_text").textContent = _("Reconnecting...");
document.documentElement.classList.add("noVNC_reconnecting");
var delay = parseInt(UI.getSetting('reconnect_delay'));
UI.reconnect_callback = setTimeout(UI.reconnect, delay);
return;
}
UI.openControlbar();
UI.openConnectPanel();
},
cancelReconnect: function() {
if (UI.reconnect_callback !== null) {
clearTimeout(UI.reconnect_callback);
UI.reconnect_callback = null;
}
document.documentElement.classList.remove("noVNC_reconnecting");
UI.openControlbar();
UI.openConnectPanel();
},
/* ------^-------
* /CONNECTION
* ==============
* PASSWORD
* ------v------*/
passwordRequired: function(rfb, msg) {
document.getElementById('noVNC_password_dlg')
.classList.add('noVNC_open');
setTimeout(function () {
document.getElementById('noVNC_password_input').focus();
}, 100);
if (typeof msg === 'undefined') {
msg = _("Password is required");
}
Log.Warn(msg);
UI.showStatus(msg, "warning");
},
setPassword: function(e) {
var password = document.getElementById('noVNC_password_input').value;
UI.rfb.sendPassword(password);
UI.reconnect_password = password;
document.getElementById('noVNC_password_dlg')
.classList.remove('noVNC_open');
// Prevent actually submitting the form
e.preventDefault();
},
/* ------^-------
* /PASSWORD
* ==============
* FULLSCREEN
* ------v------*/
toggleFullscreen: function() {
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.enableDisableViewClip();
UI.updateFullscreenButton();
},
updateFullscreenButton: function() {
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: function() {
if (!UI.rfb) return;
var screen = UI.screenSize();
if (screen && UI.connected && UI.rfb.get_display()) {
var display = UI.rfb.get_display();
var resizeMode = UI.getSetting('resize');
display.set_scale(1);
// Make sure the viewport is adjusted first
UI.updateViewClip();
if (resizeMode === 'remote') {
// 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(UI.resizeTimeout);
UI.resizeTimeout = setTimeout(function(){
// Request a remote size covering the viewport
if (UI.rfb.requestDesktopSize(screen.w, screen.h)) {
Log.Debug('Requested new desktop size: ' +
screen.w + 'x' + screen.h);
}
}, 500);
} else if (resizeMode === 'scale' || resizeMode === 'downscale') {
var downscaleOnly = resizeMode === 'downscale';
display.autoscale(screen.w, screen.h, downscaleOnly);
UI.fixScrollbars();
}
}
},
// Gets the the size of the available viewport in the browser window
screenSize: function() {
var screen = document.getElementById('noVNC_screen');
return {w: screen.offsetWidth, h: screen.offsetHeight};
},
// Normally we only apply the current resize mode after a window resize
// event. This means that when a new connection is opened, there is no
// resize mode active.
// We have to wait until the first FBU because this is where the client
// will find the supported encodings of the server. Some calls later in
// the chain is dependant on knowing the server-capabilities.
initialResize: function(rfb, fbu) {
UI.applyResizeMode();
// After doing this once, we remove the callback.
UI.rfb.set_onFBUComplete(function() { });
},
/* ------^-------
* /RESIZE
* ==============
* CLIPPING
* ------v------*/
// Set and configure viewport clipping
setViewClip: function(clip) {
UI.updateSetting('clip', clip);
UI.updateViewClip();
},
// Update parameters that depend on the clip setting
updateViewClip: function() {
if (!UI.rfb) return;
var display = UI.rfb.get_display();
var cur_clip = display.get_viewport();
var new_clip = UI.getSetting('clip');
var resizeSetting = UI.getSetting('resize');
if (resizeSetting === 'downscale' || resizeSetting === 'scale') {
// Disable clipping if we are scaling
new_clip = false;
} else if (isTouchDevice) {
// Touch devices usually have shit scrollbars
new_clip = true;
}
if (cur_clip !== new_clip) {
display.set_viewport(new_clip);
}
var size = UI.screenSize();
if (new_clip && size) {
// When clipping is enabled, the screen is limited to
// the size of the browser window.
display.viewportChangeSize(size.w, size.h);
UI.fixScrollbars();
}
// Changing the viewport may change the state of
// the dragging button
UI.updateViewDrag();
},
// Handle special cases where clipping is forced on/off or locked
enableDisableViewClip: function() {
var resizeSetting = UI.getSetting('resize');
// Disable clipping if we are scaling, connected or on touch
if (resizeSetting === 'downscale' || resizeSetting === 'scale' ||
isTouchDevice) {
UI.disableSetting('clip');
} else {
UI.enableSetting('clip');
}
},
/* ------^-------
* /CLIPPING
* ==============
* VIEWDRAG
* ------v------*/
toggleViewDrag: function() {
if (!UI.rfb) return;
var drag = UI.rfb.get_viewportDrag();
UI.setViewDrag(!drag);
},
// Set the view drag mode which moves the viewport on mouse drags
setViewDrag: function(drag) {
if (!UI.rfb) return;
UI.rfb.set_viewportDrag(drag);
UI.updateViewDrag();
},
updateViewDrag: function() {
var clipping = false;
if (!UI.connected) return;
// Check if viewport drag is possible. It is only possible
// if the remote display is clipping the client display.
if (UI.rfb.get_display().get_viewport() &&
UI.rfb.get_display().clippingDisplay()) {
clipping = true;
}
var viewDragButton = document.getElementById('noVNC_view_drag_button');
if (!clipping &&
UI.rfb.get_viewportDrag()) {
// The size of the remote display is the same or smaller
// than the client display. Make sure viewport drag isn't
// active when it can't be used.
UI.rfb.set_viewportDrag(false);
}
if (UI.rfb.get_viewportDrag()) {
viewDragButton.classList.add("noVNC_selected");
} else {
viewDragButton.classList.remove("noVNC_selected");
}
// Different behaviour for touch vs non-touch
// The button is disabled instead of hidden on touch devices
if (isTouchDevice) {
viewDragButton.classList.remove("noVNC_hidden");
if (clipping) {
viewDragButton.disabled = false;
} else {
viewDragButton.disabled = true;
}
} else {
viewDragButton.disabled = false;
if (clipping) {
viewDragButton.classList.remove("noVNC_hidden");
} else {
viewDragButton.classList.add("noVNC_hidden");
}
}
},
/* ------^-------
* /VIEWDRAG
* ==============
* KEYBOARD
* ------v------*/
showVirtualKeyboard: function() {
if (!isTouchDevice) return;
var input = document.getElementById('noVNC_keyboardinput');
if (document.activeElement == input) return;
input.focus();
try {
var l = input.value.length;
// Move the caret to the end
input.setSelectionRange(l, l);
} catch (err) {} // setSelectionRange is undefined in Google Chrome
},
hideVirtualKeyboard: function() {
if (!isTouchDevice) return;
var input = document.getElementById('noVNC_keyboardinput');
if (document.activeElement != input) return;
input.blur();
},
toggleVirtualKeyboard: function () {
if (document.getElementById('noVNC_keyboard_button')
.classList.contains("noVNC_selected")) {
UI.hideVirtualKeyboard();
} else {
UI.showVirtualKeyboard();
}
},
onfocusVirtualKeyboard: function(event) {
document.getElementById('noVNC_keyboard_button')
.classList.add("noVNC_selected");
},
onblurVirtualKeyboard: function(event) {
document.getElementById('noVNC_keyboard_button')
.classList.remove("noVNC_selected");
},
keepVirtualKeyboard: function(event) {
var 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: function() {
var kbi = document.getElementById('noVNC_keyboardinput');
kbi.value = new Array(UI.defaultKeyboardinputLen).join("_");
UI.lastKeyboardinput = kbi.value;
},
// 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: function(event) {
if (!UI.rfb) return;
var newValue = event.target.value;
if (!UI.lastKeyboardinput) {
UI.keyboardinputReset();
}
var oldValue = UI.lastKeyboardinput;
var 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;
}
var oldLen = oldValue.length;
var backspaces;
var inputs = newLen - oldLen;
if (inputs < 0) {
backspaces = -inputs;
} else {
backspaces = 0;
}
// Compare the old string with the new to account for
// text-corrections or other input that modify existing text
var i;
for (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 (i = 0; i < backspaces; i++) {
UI.rfb.sendKey(KeyTable.XK_BackSpace);
}
for (i = newLen - inputs; i < newLen; i++) {
UI.rfb.sendKey(keysyms.fromUnicode(newValue.charCodeAt(i)).keysym);
}
// 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: function() {
UI.closeAllPanels();
UI.openControlbar();
document.getElementById('noVNC_modifiers')
.classList.add("noVNC_open");
document.getElementById('noVNC_toggle_extra_keys_button')
.classList.add("noVNC_selected");
},
closeExtraKeys: function() {
document.getElementById('noVNC_modifiers')
.classList.remove("noVNC_open");
document.getElementById('noVNC_toggle_extra_keys_button')
.classList.remove("noVNC_selected");
},
toggleExtraKeys: function() {
if(document.getElementById('noVNC_modifiers')
.classList.contains("noVNC_open")) {
UI.closeExtraKeys();
} else {
UI.openExtraKeys();
}
},
sendEsc: function() {
UI.rfb.sendKey(KeyTable.XK_Escape);
},
sendTab: function() {
UI.rfb.sendKey(KeyTable.XK_Tab);
},
toggleCtrl: function() {
var btn = document.getElementById('noVNC_toggle_ctrl_button');
if (btn.classList.contains("noVNC_selected")) {
UI.rfb.sendKey(KeyTable.XK_Control_L, false);
btn.classList.remove("noVNC_selected");
} else {
UI.rfb.sendKey(KeyTable.XK_Control_L, true);
btn.classList.add("noVNC_selected");
}
},
toggleAlt: function() {
var btn = document.getElementById('noVNC_toggle_alt_button');
if (btn.classList.contains("noVNC_selected")) {
UI.rfb.sendKey(KeyTable.XK_Alt_L, false);
btn.classList.remove("noVNC_selected");
} else {
UI.rfb.sendKey(KeyTable.XK_Alt_L, true);
btn.classList.add("noVNC_selected");
}
},
sendCtrlAltDel: function() {
UI.rfb.sendCtrlAltDel();
},
/* ------^-------
* /EXTRA KEYS
* ==============
* MISC
* ------v------*/
setMouseButton: function(num) {
var view_only = UI.rfb.get_view_only();
if (UI.rfb && !view_only) {
UI.rfb.get_mouse().set_touchButton(num);
}
var blist = [0, 1,2,4];
for (var b = 0; b < blist.length; b++) {
var button = document.getElementById('noVNC_mouse_button' +
blist[b]);
if (blist[b] === num && !view_only) {
button.classList.remove("noVNC_hidden");
} else {
button.classList.add("noVNC_hidden");
}
}
},
displayBlur: function() {
if (UI.rfb && !UI.rfb.get_view_only()) {
UI.rfb.get_keyboard().set_focused(false);
UI.rfb.get_mouse().set_focused(false);
}
},
displayFocus: function() {
if (UI.rfb && !UI.rfb.get_view_only()) {
UI.rfb.get_keyboard().set_focused(true);
UI.rfb.get_mouse().set_focused(true);
}
},
updateLocalCursor: function() {
if (!UI.rfb) return;
UI.rfb.set_local_cursor(UI.getSetting('cursor'));
},
updateViewOnly: function() {
if (!UI.rfb) return;
UI.rfb.set_view_only(UI.getSetting('view_only'));
},
updateLogging: function() {
WebUtil.init_logging(UI.getSetting('logging'));
},
updateSessionSize: function(rfb, width, height) {
UI.updateViewClip();
UI.fixScrollbars();
},
fixScrollbars: function() {
// 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.
var screen = document.getElementById('noVNC_screen');
screen.style.overflow = 'hidden';
// Force Chrome to recalculate the layout by asking for
// an element's dimensions
screen.getBoundingClientRect();
screen.style.overflow = null;
},
updateDesktopName: function(rfb, name) {
UI.desktopName = name;
// Display the desktop name in the document title
document.title = name + " - noVNC";
},
bell: function(rfb) {
if (WebUtil.getConfigVar('bell', 'on') === 'on') {
document.getElementById('noVNC_bell').play();
}
},
//Helper to add options to dropdown.
addOption: function(selectbox, text, value) {
var optn = document.createElement("OPTION");
optn.text = text;
optn.value = value;
selectbox.options.add(optn);
},
/* ------^-------
* /MISC
* ==============
*/
};
// Set up translations
var LINGUAS = ["de", "el", "nl", "sv"];
l10n.setup(LINGUAS);
if (l10n.language !== "en" && l10n.dictionary === undefined) {
WebUtil.fetchJSON('app/locale/' + l10n.language + '.json', function (translations) {
l10n.dictionary = translations;
// wait for translations to load before loading the UI
UI.prime();
}, function (err) {
throw err;
});
} else {
UI.prime();
}
export default UI;
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