app/ui.js

   1 /*
   2  * noVNC: HTML5 VNC client
   3  * Copyright (C) 2012 Joel Martin
   4  * Copyright (C) 2016 Samuel Mannehed for Cendio AB
   5  * Licensed under MPL 2.0 (see LICENSE.txt)
   6  *
   7  * See README.md for usage and integration instructions.
   8  */
   9
  10 /* jslint white: false, browser: true */
  11 /* global window, document.getElementById, Util, WebUtil, RFB, Display */
  12
  13 /* [module]
  14  * import Util from "../core/util";
  15  * import KeyTable from "../core/keysym";
  16  * import RFB from "../core/rfb";
  17  * import Display from "../core/display";
  18  * import WebUtil from "./webutil";
  19  */
  20
  21 var UI;
  22
  23 (function () {
  24     "use strict";
  25
  26     /* [begin skip-as-module] */
  27     // Load supporting scripts
  28     WebUtil.load_scripts(
  29         {'core': ["base64.js", "websock.js", "des.js", "keysymdef.js",
  30                   "xtscancodes.js", "keyboard.js", "input.js", "display.js",
  31                   "inflator.js", "rfb.js", "keysym.js"]});
  32
  33     window.onscriptsload = function () { UI.load(); };
  34     /* [end skip-as-module] */
  35
  36     UI = {
  37
  38         rfb_state: 'loaded',
  39
  40         resizeTimeout: null,
  41         popupStatusTimeout: null,
  42         hideKeyboardTimeout: null,
  43
  44         settingsOpen: false,
  45         connSettingsOpen: false,
  46         clipboardOpen: false,
  47         keyboardVisible: false,
  48         extraKeysVisible: false,
  49
  50         isTouchDevice: false,
  51         isSafari: false,
  52         rememberedClipSetting: null,
  53         lastKeyboardinput: null,
  54         defaultKeyboardinputLen: 100,
  55
  56         ctrlOn: false,
  57         altOn: false,
  58
  59         // Setup rfb object, load settings from browser storage, then call
  60         // UI.init to setup the UI/menus
  61         load: function(callback) {
  62             WebUtil.initSettings(UI.start, callback);
  63         },
  64
  65         // Render default UI and initialize settings menu
  66         start: function(callback) {
  67             UI.isTouchDevice = 'ontouchstart' in document.documentElement;
  68
  69             // Stylesheet selection dropdown
  70             var sheet = WebUtil.selectStylesheet();
  71             var sheets = WebUtil.getStylesheets();
  72             var i;
  73             for (i = 0; i < sheets.length; i += 1) {
  74                 UI.addOption(document.getElementById('noVNC_setting_stylesheet'),sheets[i].title, sheets[i].title);
  75             }
  76
  77             // Logging selection dropdown
  78             var llevels = ['error', 'warn', 'info', 'debug'];
  79             for (i = 0; i < llevels.length; i += 1) {
  80                 UI.addOption(document.getElementById('noVNC_setting_logging'),llevels[i], llevels[i]);
  81             }
  82
  83             // Settings with immediate effects
  84             UI.initSetting('logging', 'warn');
  85             WebUtil.init_logging(UI.getSetting('logging'));
  86
  87             UI.initSetting('stylesheet', 'default');
  88             WebUtil.selectStylesheet(null);
  89             // call twice to get around webkit bug
  90             WebUtil.selectStylesheet(UI.getSetting('stylesheet'));
  91
  92             // if port == 80 (or 443) then it won't be present and should be
  93             // set manually
  94             var port = window.location.port;
  95             if (!port) {
  96                 if (window.location.protocol.substring(0,5) == 'https') {
  97                     port = 443;
  98                 }
  99                 else if (window.location.protocol.substring(0,4) == 'http') {
 100                     port = 80;
 101                 }
 102             }
 103
 104             /* Populate the controls if defaults are provided in the URL */
 105             UI.initSetting('host', window.location.hostname);
 106             UI.initSetting('port', port);
 107             UI.initSetting('password', '');
 108             UI.initSetting('encrypt', (window.location.protocol === "https:"));
 109             UI.initSetting('true_color', true);
 110             UI.initSetting('cursor', !UI.isTouchDevice);
 111             UI.initSetting('resize', 'off');
 112             UI.initSetting('shared', true);
 113             UI.initSetting('view_only', false);
 114             UI.initSetting('path', 'websockify');
 115             UI.initSetting('repeaterID', '');
 116             UI.initSetting('token', '');
 117
 118             var autoconnect = WebUtil.getConfigVar('autoconnect', false);
 119             if (autoconnect === 'true' || autoconnect == '1') {
 120                 autoconnect = true;
 121                 UI.connect();
 122             } else {
 123                 autoconnect = false;
 124             }
 125
 126             UI.updateVisualState();
 127
 128             document.getElementById('noVNC_setting_host').focus();
 129
 130             // Show mouse selector buttons on touch screen devices
 131             if (UI.isTouchDevice) {
 132                 // Show mobile buttons
 133                 document.getElementById('noVNC_mobile_buttons').style.display = "inline";
 134                 UI.setMouseButton();
 135                 // Remove the address bar
 136                 setTimeout(function() { window.scrollTo(0, 1); }, 100);
 137                 UI.forceSetting('clip', true);
 138             } else {
 139                 UI.initSetting('clip', false);
 140             }
 141
 142             UI.setViewClip();
 143             UI.setBarPosition();
 144
 145             Util.addEvent(window, 'resize', function () {
 146                 UI.applyResizeMode();
 147                 UI.setViewClip();
 148                 UI.updateViewDrag();
 149                 UI.setBarPosition();
 150             } );
 151
 152             UI.isSafari = (navigator.userAgent.indexOf('Safari') != -1 &&
 153                            navigator.userAgent.indexOf('Chrome') == -1);
 154
 155             // Only show the button if fullscreen is properly supported
 156             // * Safari doesn't support alphanumerical input while in fullscreen
 157             if (!UI.isSafari &&
 158                 (document.documentElement.requestFullscreen ||
 159                  document.documentElement.mozRequestFullScreen ||
 160                  document.documentElement.webkitRequestFullscreen ||
 161                  document.body.msRequestFullscreen)) {
 162                 document.getElementById('noVNC_fullscreen_button').style.display = "inline";
 163                 Util.addEvent(window, 'fullscreenchange', UI.updateFullscreenButton);
 164                 Util.addEvent(window, 'mozfullscreenchange', UI.updateFullscreenButton);
 165                 Util.addEvent(window, 'webkitfullscreenchange', UI.updateFullscreenButton);
 166                 Util.addEvent(window, 'msfullscreenchange', UI.updateFullscreenButton);
 167             }
 168
 169             Util.addEvent(window, 'load', UI.keyboardinputReset);
 170
 171             // While connected we want to display a confirmation dialogue
 172             // if the user tries to leave the page
 173             Util.addEvent(window, 'beforeunload', function (e) {
 174                 if (UI.rfb && UI.rfb_state === 'normal') {
 175                     var msg = "You are currently connected.";
 176                     e.returnValue = msg;
 177                     return msg;
 178                 } else {
 179                     return void 0; // To prevent the dialogue when disconnected
 180                 }
 181             });
 182
 183             // Show description by default when hosted at for kanaka.github.com
 184             if (location.host === "kanaka.github.io") {
 185                 // Open the description dialog
 186                 document.getElementById('noVNC_description').style.display = "block";
 187             } else {
 188                 // Show the connect panel on first load unless autoconnecting
 189                 if (autoconnect === UI.connSettingsOpen) {
 190                     UI.toggleConnectPanel();
 191                 }
 192             }
 193
 194             // Add mouse event click/focus/blur event handlers to the UI
 195             UI.addMouseHandlers();
 196
 197             if (typeof callback === "function") {
 198                 callback(UI.rfb);
 199             }
 200         },
 201
 202         initRFB: function() {
 203             try {
 204                 UI.rfb = new RFB({'target': document.getElementById('noVNC_canvas'),
 205                                   'onUpdateState': UI.updateState,
 206                                   'onXvpInit': UI.updateXvpButton,
 207                                   'onClipboard': UI.clipboardReceive,
 208                                   'onFBUComplete': UI.initialResize,
 209                                   'onFBResize': UI.updateViewDrag,
 210                                   'onDesktopName': UI.updateDocumentTitle});
 211                 return true;
 212             } catch (exc) {
 213                 UI.updateState(null, 'fatal', null, 'Unable to create RFB client -- ' + exc);
 214                 return false;
 215             }
 216         },
 217
 218         addMouseHandlers: function() {
 219             // Setup interface handlers that can't be inline
 220             document.getElementById("noVNC_view_drag_button").onclick = UI.toggleViewDrag;
 221             document.getElementById("noVNC_mouse_button0").onclick = function () { UI.setMouseButton(1); };
 222             document.getElementById("noVNC_mouse_button1").onclick = function () { UI.setMouseButton(2); };
 223             document.getElementById("noVNC_mouse_button2").onclick = function () { UI.setMouseButton(4); };
 224             document.getElementById("noVNC_mouse_button4").onclick = function () { UI.setMouseButton(0); };
 225             document.getElementById("noVNC_keyboard_button").onclick = UI.showKeyboard;
 226
 227             document.getElementById("noVNC_keyboardinput").oninput = UI.keyInput;
 228             document.getElementById("noVNC_keyboardinput").onblur = UI.hideKeyboard;
 229             document.getElementById("noVNC_keyboardinput").onsubmit = function () { return false; };
 230
 231             document.getElementById("noVNC_toggleExtraKeys_button").onclick = UI.toggleExtraKeys;
 232             document.getElementById("noVNC_toggleCtrl_button").onclick = UI.toggleCtrl;
 233             document.getElementById("noVNC_toggleAlt_button").onclick = UI.toggleAlt;
 234             document.getElementById("noVNC_sendTab_button").onclick = UI.sendTab;
 235             document.getElementById("noVNC_sendEsc_button").onclick = UI.sendEsc;
 236
 237             document.getElementById("noVNC_sendCtrlAltDel_button").onclick = UI.sendCtrlAltDel;
 238             document.getElementById("noVNC_xvpShutdown_button").onclick = function() { UI.rfb.xvpShutdown(); },
 239             document.getElementById("noVNC_xvpReboot_button").onclick = function() { UI.rfb.xvpReboot(); },
 240             document.getElementById("noVNC_xvpReset_button").onclick = function() { UI.rfb.xvpReset(); },
 241             document.getElementById("noVNC_status").onclick = UI.popupStatus;
 242             document.getElementById("noVNC_popup_status").onclick = UI.closePopup;
 243             document.getElementById("noVNC_toggleXvp_button").onclick = UI.toggleXvpPanel;
 244             document.getElementById("noVNC_clipboard_button").onclick = UI.toggleClipboardPanel;
 245             document.getElementById("noVNC_fullscreen_button").onclick = UI.toggleFullscreen;
 246             document.getElementById("noVNC_settings_button").onclick = UI.toggleSettingsPanel;
 247             document.getElementById("noVNC_connectPanel_button").onclick = UI.toggleConnectPanel;
 248             document.getElementById("noVNC_disconnect_button").onclick = UI.disconnect;
 249             document.getElementById("noVNC_description_button").onclick = UI.toggleConnectPanel;
 250
 251             document.getElementById("noVNC_clipboard_text").onfocus = UI.displayBlur;
 252             document.getElementById("noVNC_clipboard_text").onblur = UI.displayFocus;
 253             document.getElementById("noVNC_clipboard_text").onchange = UI.clipboardSend;
 254             document.getElementById("noVNC_clipboard_clear_button").onclick = UI.clipboardClear;
 255
 256             document.getElementById("noVNC_settings_menu").onmouseover = UI.displayBlur;
 257             document.getElementById("noVNC_settings_menu").onmouseover = UI.displayFocus;
 258             document.getElementById("noVNC_settings_apply").onclick = UI.settingsApply;
 259
 260             document.getElementById("noVNC_connect_button").onclick = UI.connect;
 261
 262             document.getElementById("noVNC_setting_resize").onchange = UI.enableDisableViewClip;
 263         },
 264
 265 /* ------^-------
 266  *     /INIT
 267  * ==============
 268  *     VISUAL
 269  * ------v------*/
 270
 271         updateState: function(rfb, state, oldstate, msg) {
 272             UI.rfb_state = state;
 273             var klass;
 274             switch (state) {
 275                 case 'failed':
 276                 case 'fatal':
 277                     klass = "noVNC_status_error";
 278                     break;
 279                 case 'normal':
 280                     klass = "noVNC_status_normal";
 281                     break;
 282                 case 'disconnected':
 283                     document.getElementById('noVNC_logo').style.display = "block";
 284                     document.getElementById('noVNC_screen').style.display = "none";
 285                     /* falls through */
 286                 case 'loaded':
 287                     klass = "noVNC_status_normal";
 288                     break;
 289                 case 'password':
 290                     UI.toggleConnectPanel();
 291
 292                     document.getElementById('noVNC_connect_button').value = "Send Password";
 293                     document.getElementById('noVNC_connect_button').onclick = UI.setPassword;
 294                     document.getElementById('noVNC_setting_password').focus();
 295
 296                     klass = "noVNC_status_warn";
 297                     break;
 298                 default:
 299                     klass = "noVNC_status_warn";
 300                     break;
 301             }
 302
 303             if (typeof(msg) !== 'undefined') {
 304                 document.getElementById('noVNC_control_bar').setAttribute("class", klass);
 305                 document.getElementById('noVNC_status').innerHTML = msg;
 306             }
 307
 308             UI.updateVisualState();
 309         },
 310
 311         // Disable/enable controls depending on connection state
 312         updateVisualState: function() {
 313             var connected = UI.rfb && UI.rfb_state === 'normal';
 314
 315             //Util.Debug(">> updateVisualState");
 316             document.getElementById('noVNC_setting_encrypt').disabled = connected;
 317             document.getElementById('noVNC_setting_true_color').disabled = connected;
 318             if (Util.browserSupportsCursorURIs()) {
 319                 document.getElementById('noVNC_setting_cursor').disabled = connected;
 320             } else {
 321                 UI.updateSetting('cursor', !UI.isTouchDevice);
 322                 document.getElementById('noVNC_setting_cursor').disabled = true;
 323             }
 324
 325             UI.enableDisableViewClip();
 326             document.getElementById('noVNC_setting_resize').disabled = connected;
 327             document.getElementById('noVNC_setting_shared').disabled = connected;
 328             document.getElementById('noVNC_setting_view_only').disabled = connected;
 329             document.getElementById('noVNC_setting_path').disabled = connected;
 330             document.getElementById('noVNC_setting_repeaterID').disabled = connected;
 331
 332             if (connected) {
 333                 UI.setViewClip();
 334                 UI.setMouseButton(1);
 335                 document.getElementById('noVNC_clipboard_button').style.display = "inline";
 336                 document.getElementById('noVNC_keyboard_button').style.display = "inline";
 337                 document.getElementById('noVNC_extra_keys').style.display = "";
 338                 document.getElementById('noVNC_sendCtrlAltDel_button').style.display = "inline";
 339             } else {
 340                 UI.setMouseButton();
 341                 document.getElementById('noVNC_clipboard_button').style.display = "none";
 342                 document.getElementById('noVNC_keyboard_button').style.display = "none";
 343                 document.getElementById('noVNC_extra_keys').style.display = "none";
 344                 document.getElementById('noVNC_sendCtrlAltDel_button').style.display = "none";
 345                 UI.updateXvpButton(0);
 346             }
 347
 348             // State change disables viewport dragging.
 349             // It is enabled (toggled) by direct click on the button
 350             UI.updateViewDrag(false);
 351
 352             switch (UI.rfb_state) {
 353                 case 'fatal':
 354                 case 'failed':
 355                 case 'disconnected':
 356                     document.getElementById('noVNC_connectPanel_button').style.display = "";
 357                     document.getElementById('noVNC_disconnect_button').style.display = "none";
 358                     UI.connSettingsOpen = false;
 359                     UI.toggleConnectPanel();
 360                     break;
 361                 case 'loaded':
 362                     document.getElementById('noVNC_connectPanel_button').style.display = "";
 363                     document.getElementById('noVNC_disconnect_button').style.display = "none";
 364                     break;
 365                 default:
 366                     document.getElementById('noVNC_connectPanel_button').style.display = "none";
 367                     document.getElementById('noVNC_disconnect_button').style.display = "";
 368                     break;
 369             }
 370
 371             //Util.Debug("<< updateVisualState");
 372         },
 373
 374         popupStatus: function(text) {
 375             var psp = document.getElementById('noVNC_popup_status');
 376
 377             clearTimeout(UI.popupStatusTimeout);
 378
 379             if (typeof text === 'string') {
 380                 psp.innerHTML = text;
 381             } else {
 382                 psp.innerHTML = document.getElementById('noVNC_status').innerHTML;
 383             }
 384             psp.style.display = "block";
 385             psp.style.left = window.innerWidth/2 -
 386                 parseInt(window.getComputedStyle(psp).width)/2 -30 + "px";
 387
 388             // Show the popup for a maximum of 1.5 seconds
 389             UI.popupStatusTimeout = setTimeout(UI.closePopup, 1500);
 390         },
 391
 392         closePopup: function() {
 393             clearTimeout(UI.popupStatusTimeout);
 394             document.getElementById('noVNC_popup_status').style.display = "none";
 395         },
 396
 397 /* ------^-------
 398  *    /VISUAL
 399  * ==============
 400  *    SETTINGS
 401  * ------v------*/
 402
 403         // Initial page load read/initialization of settings
 404         initSetting: function(name, defVal) {
 405             // Check Query string followed by cookie
 406             var val = WebUtil.getConfigVar(name);
 407             if (val === null) {
 408                 val = WebUtil.readSetting(name, defVal);
 409             }
 410             UI.updateSetting(name, val);
 411             return val;
 412         },
 413
 414         // Update cookie and form control setting. If value is not set, then
 415         // updates from control to current cookie setting.
 416         updateSetting: function(name, value) {
 417
 418             // Save the cookie for this session
 419             if (typeof value !== 'undefined') {
 420                 WebUtil.writeSetting(name, value);
 421             }
 422
 423             // Update the settings control
 424             value = UI.getSetting(name);
 425
 426             var ctrl = document.getElementById('noVNC_setting_' + name);
 427             if (ctrl.type === 'checkbox') {
 428                 ctrl.checked = value;
 429
 430             } else if (typeof ctrl.options !== 'undefined') {
 431                 for (var i = 0; i < ctrl.options.length; i += 1) {
 432                     if (ctrl.options[i].value === value) {
 433                         ctrl.selectedIndex = i;
 434                         break;
 435                     }
 436                 }
 437             } else {
 438                 /*Weird IE9 error leads to 'null' appearring
 439                 in textboxes instead of ''.*/
 440                 if (value === null) {
 441                     value = "";
 442                 }
 443                 ctrl.value = value;
 444             }
 445         },
 446
 447         // Save control setting to cookie
 448         saveSetting: function(name) {
 449             var val, ctrl = document.getElementById('noVNC_setting_' + name);
 450             if (ctrl.type === 'checkbox') {
 451                 val = ctrl.checked;
 452             } else if (typeof ctrl.options !== 'undefined') {
 453                 val = ctrl.options[ctrl.selectedIndex].value;
 454             } else {
 455                 val = ctrl.value;
 456             }
 457             WebUtil.writeSetting(name, val);
 458             //Util.Debug("Setting saved '" + name + "=" + val + "'");
 459             return val;
 460         },
 461
 462         // Force a setting to be a certain value
 463         forceSetting: function(name, val) {
 464             UI.updateSetting(name, val);
 465             return val;
 466         },
 467
 468         // Read form control compatible setting from cookie
 469         getSetting: function(name) {
 470             var ctrl = document.getElementById('noVNC_setting_' + name);
 471             var val = WebUtil.readSetting(name);
 472             if (typeof val !== 'undefined' && val !== null && ctrl.type === 'checkbox') {
 473                 if (val.toString().toLowerCase() in {'0':1, 'no':1, 'false':1}) {
 474                     val = false;
 475                 } else {
 476                     val = true;
 477                 }
 478             }
 479             return val;
 480         },
 481
 482         // Save/apply settings when 'Apply' button is pressed
 483         settingsApply: function() {
 484             //Util.Debug(">> settingsApply");
 485             UI.saveSetting('encrypt');
 486             UI.saveSetting('true_color');
 487             if (Util.browserSupportsCursorURIs()) {
 488                 UI.saveSetting('cursor');
 489             }
 490
 491             UI.saveSetting('resize');
 492
 493             if (UI.getSetting('resize') === 'downscale' || UI.getSetting('resize') === 'scale') {
 494                 UI.forceSetting('clip', false);
 495             }
 496
 497             UI.saveSetting('clip');
 498             UI.saveSetting('shared');
 499             UI.saveSetting('view_only');
 500             UI.saveSetting('path');
 501             UI.saveSetting('repeaterID');
 502             UI.saveSetting('stylesheet');
 503             UI.saveSetting('logging');
 504
 505             // Settings with immediate (non-connected related) effect
 506             WebUtil.selectStylesheet(UI.getSetting('stylesheet'));
 507             WebUtil.init_logging(UI.getSetting('logging'));
 508             UI.setViewClip();
 509             UI.updateViewDrag();
 510             //Util.Debug("<< settingsApply");
 511         },
 512
 513         // Open menu
 514         openSettingsMenu: function() {
 515             // Close the description panel
 516             document.getElementById('noVNC_description').style.display = "none";
 517             // Close clipboard panel if open
 518             if (UI.clipboardOpen === true) {
 519                 UI.toggleClipboardPanel();
 520             }
 521             // Close connection settings if open
 522             if (UI.connSettingsOpen === true) {
 523                 UI.toggleConnectPanel();
 524             }
 525             // Close XVP panel if open
 526             if (UI.xvpOpen === true) {
 527                 UI.toggleXvpPanel();
 528             }
 529             document.getElementById('noVNC_settings').style.display = "block";
 530             document.getElementById('noVNC_settings_button').className = "noVNC_status_button_selected";
 531             UI.settingsOpen = true;
 532         },
 533
 534         // Close menu (without applying settings)
 535         closeSettingsMenu: function() {
 536             document.getElementById('noVNC_settings').style.display = "none";
 537             document.getElementById('noVNC_settings_button').className = "noVNC_status_button";
 538             UI.settingsOpen = false;
 539         },
 540
 541         // Toggle the settings menu:
 542         //   On open, settings are refreshed from saved cookies.
 543         //   On close, settings are applied
 544         toggleSettingsPanel: function() {
 545             // Close the description panel
 546             document.getElementById('noVNC_description').style.display = "none";
 547             if (UI.settingsOpen) {
 548                 UI.settingsApply();
 549                 UI.closeSettingsMenu();
 550             } else {
 551                 UI.updateSetting('encrypt');
 552                 UI.updateSetting('true_color');
 553                 if (Util.browserSupportsCursorURIs()) {
 554                     UI.updateSetting('cursor');
 555                 } else {
 556                     UI.updateSetting('cursor', !UI.isTouchDevice);
 557                     document.getElementById('noVNC_setting_cursor').disabled = true;
 558                 }
 559                 UI.updateSetting('clip');
 560                 UI.updateSetting('resize');
 561                 UI.updateSetting('shared');
 562                 UI.updateSetting('view_only');
 563                 UI.updateSetting('path');
 564                 UI.updateSetting('repeaterID');
 565                 UI.updateSetting('stylesheet');
 566                 UI.updateSetting('logging');
 567
 568                 UI.openSettingsMenu();
 569             }
 570         },
 571
 572 /* ------^-------
 573  *   /SETTINGS
 574  * ==============
 575  *      XVP
 576  * ------v------*/
 577
 578         // Show the XVP panel
 579         toggleXvpPanel: function() {
 580             // Close the description panel
 581             document.getElementById('noVNC_description').style.display = "none";
 582             // Close settings if open
 583             if (UI.settingsOpen === true) {
 584                 UI.settingsApply();
 585                 UI.closeSettingsMenu();
 586             }
 587             // Close connection settings if open
 588             if (UI.connSettingsOpen === true) {
 589                 UI.toggleConnectPanel();
 590             }
 591             // Close clipboard panel if open
 592             if (UI.clipboardOpen === true) {
 593                 UI.toggleClipboardPanel();
 594             }
 595             // Toggle XVP panel
 596             if (UI.xvpOpen === true) {
 597                 document.getElementById('noVNC_xvp').style.display = "none";
 598                 document.getElementById('noVNC_toggleXvp_button').className = "noVNC_status_button";
 599                 UI.xvpOpen = false;
 600             } else {
 601                 document.getElementById('noVNC_xvp').style.display = "block";
 602                 document.getElementById('noVNC_toggleXvp_button').className = "noVNC_status_button_selected";
 603                 UI.xvpOpen = true;
 604             }
 605         },
 606
 607         // Disable/enable XVP button
 608         updateXvpButton: function(ver) {
 609             if (ver >= 1) {
 610                 document.getElementById('noVNC_toggleXvp_button').style.display = 'inline';
 611             } else {
 612                 document.getElementById('noVNC_toggleXvp_button').style.display = 'none';
 613                 // Close XVP panel if open
 614                 if (UI.xvpOpen === true) {
 615                     UI.toggleXvpPanel();
 616                 }
 617             }
 618         },
 619
 620 /* ------^-------
 621  *     /XVP
 622  * ==============
 623  *   CLIPBOARD
 624  * ------v------*/
 625
 626         // Show the clipboard panel
 627         toggleClipboardPanel: function() {
 628             // Close the description panel
 629             document.getElementById('noVNC_description').style.display = "none";
 630             // Close settings if open
 631             if (UI.settingsOpen === true) {
 632                 UI.settingsApply();
 633                 UI.closeSettingsMenu();
 634             }
 635             // Close connection settings if open
 636             if (UI.connSettingsOpen === true) {
 637                 UI.toggleConnectPanel();
 638             }
 639             // Close XVP panel if open
 640             if (UI.xvpOpen === true) {
 641                 UI.toggleXvpPanel();
 642             }
 643             // Toggle Clipboard Panel
 644             if (UI.clipboardOpen === true) {
 645                 document.getElementById('noVNC_clipboard').style.display = "none";
 646                 document.getElementById('noVNC_clipboard_button').className = "noVNC_status_button";
 647                 UI.clipboardOpen = false;
 648             } else {
 649                 document.getElementById('noVNC_clipboard').style.display = "block";
 650                 document.getElementById('noVNC_clipboard_button').className = "noVNC_status_button_selected";
 651                 UI.clipboardOpen = true;
 652             }
 653         },
 654
 655         clipboardReceive: function(rfb, text) {
 656             Util.Debug(">> UI.clipboardReceive: " + text.substr(0,40) + "...");
 657             document.getElementById('noVNC_clipboard_text').value = text;
 658             Util.Debug("<< UI.clipboardReceive");
 659         },
 660
 661         clipboardClear: function() {
 662             document.getElementById('noVNC_clipboard_text').value = "";
 663             UI.rfb.clipboardPasteFrom("");
 664         },
 665
 666         clipboardSend: function() {
 667             var text = document.getElementById('noVNC_clipboard_text').value;
 668             Util.Debug(">> UI.clipboardSend: " + text.substr(0,40) + "...");
 669             UI.rfb.clipboardPasteFrom(text);
 670             Util.Debug("<< UI.clipboardSend");
 671         },
 672
 673 /* ------^-------
 674  *  /CLIPBOARD
 675  * ==============
 676  *  CONNECTION
 677  * ------v------*/
 678
 679         // Show the connection settings panel/menu
 680         toggleConnectPanel: function() {
 681             // Close the description panel
 682             document.getElementById('noVNC_description').style.display = "none";
 683             // Close connection settings if open
 684             if (UI.settingsOpen === true) {
 685                 UI.settingsApply();
 686                 UI.closeSettingsMenu();
 687                 document.getElementById('noVNC_connectPanel_button').className = "noVNC_status_button";
 688             }
 689             // Close clipboard panel if open
 690             if (UI.clipboardOpen === true) {
 691                 UI.toggleClipboardPanel();
 692             }
 693             // Close XVP panel if open
 694             if (UI.xvpOpen === true) {
 695                 UI.toggleXvpPanel();
 696             }
 697
 698             // Toggle Connection Panel
 699             if (UI.connSettingsOpen === true) {
 700                 document.getElementById('noVNC_controls').style.display = "none";
 701                 document.getElementById('noVNC_connectPanel_button').className = "noVNC_status_button";
 702                 UI.connSettingsOpen = false;
 703                 UI.saveSetting('host');
 704                 UI.saveSetting('port');
 705                 UI.saveSetting('token');
 706                 //UI.saveSetting('password');
 707             } else {
 708                 document.getElementById('noVNC_controls').style.display = "block";
 709                 document.getElementById('noVNC_connectPanel_button').className = "noVNC_status_button_selected";
 710                 UI.connSettingsOpen = true;
 711                 document.getElementById('noVNC_setting_host').focus();
 712             }
 713         },
 714
 715         connect: function() {
 716             UI.closeSettingsMenu();
 717             UI.toggleConnectPanel();
 718
 719             var host = document.getElementById('noVNC_setting_host').value;
 720             var port = document.getElementById('noVNC_setting_port').value;
 721             var password = document.getElementById('noVNC_setting_password').value;
 722             var token = document.getElementById('noVNC_setting_token').value;
 723             var path = document.getElementById('noVNC_setting_path').value;
 724
 725             //if token is in path then ignore the new token variable
 726             if (token) {
 727                 path = WebUtil.injectParamIfMissing(path, "token", token);
 728             }
 729
 730             if ((!host) || (!port)) {
 731                 throw new Error("Must set host and port");
 732             }
 733
 734             if (!UI.initRFB()) return;
 735
 736             UI.rfb.set_encrypt(UI.getSetting('encrypt'));
 737             UI.rfb.set_true_color(UI.getSetting('true_color'));
 738             UI.rfb.set_local_cursor(UI.getSetting('cursor'));
 739             UI.rfb.set_shared(UI.getSetting('shared'));
 740             UI.rfb.set_view_only(UI.getSetting('view_only'));
 741             UI.rfb.set_repeaterID(UI.getSetting('repeaterID'));
 742
 743             UI.rfb.connect(host, port, password, path);
 744
 745             //Close dialog.
 746             setTimeout(UI.setBarPosition, 100);
 747             document.getElementById('noVNC_logo').style.display = "none";
 748             document.getElementById('noVNC_screen').style.display = "inline";
 749         },
 750
 751         disconnect: function() {
 752             UI.closeSettingsMenu();
 753             UI.rfb.disconnect();
 754
 755             // Restore the callback used for initial resize
 756             UI.rfb.set_onFBUComplete(UI.initialResize);
 757
 758             document.getElementById('noVNC_logo').style.display = "block";
 759             document.getElementById('noVNC_screen').style.display = "none";
 760
 761             // Don't display the connection settings until we're actually disconnected
 762         },
 763
 764         setPassword: function() {
 765             UI.rfb.sendPassword(document.getElementById('noVNC_setting_password').value);
 766             //Reset connect button.
 767             document.getElementById('noVNC_connect_button').value = "Connect";
 768             document.getElementById('noVNC_connect_button').onclick = UI.connect;
 769             //Hide connection panel.
 770             UI.toggleConnectPanel();
 771             return false;
 772         },
 773
 774 /* ------^-------
 775  *  /CONNECTION
 776  * ==============
 777  *   FULLSCREEN
 778  * ------v------*/
 779
 780         toggleFullscreen: function() {
 781             if (document.fullscreenElement || // alternative standard method
 782                 document.mozFullScreenElement || // currently working methods
 783                 document.webkitFullscreenElement ||
 784                 document.msFullscreenElement) {
 785                 if (document.exitFullscreen) {
 786                     document.exitFullscreen();
 787                 } else if (document.mozCancelFullScreen) {
 788                     document.mozCancelFullScreen();
 789                 } else if (document.webkitExitFullscreen) {
 790                     document.webkitExitFullscreen();
 791                 } else if (document.msExitFullscreen) {
 792                     document.msExitFullscreen();
 793                 }
 794             } else {
 795                 if (document.documentElement.requestFullscreen) {
 796                     document.documentElement.requestFullscreen();
 797                 } else if (document.documentElement.mozRequestFullScreen) {
 798                     document.documentElement.mozRequestFullScreen();
 799                 } else if (document.documentElement.webkitRequestFullscreen) {
 800                     document.documentElement.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
 801                 } else if (document.body.msRequestFullscreen) {
 802                     document.body.msRequestFullscreen();
 803                 }
 804             }
 805             UI.enableDisableViewClip();
 806             UI.updateFullscreenButton();
 807         },
 808
 809         updateFullscreenButton: function() {
 810             if (document.fullscreenElement || // alternative standard method
 811                 document.mozFullScreenElement || // currently working methods
 812                 document.webkitFullscreenElement ||
 813                 document.msFullscreenElement ) {
 814                 document.getElementById('noVNC_fullscreen_button').className = "noVNC_status_button_selected";
 815             } else {
 816                 document.getElementById('noVNC_fullscreen_button').className = "noVNC_status_button";
 817             }
 818         },
 819
 820 /* ------^-------
 821  *  /FULLSCREEN
 822  * ==============
 823  *     RESIZE
 824  * ------v------*/
 825
 826         // Apply remote resizing or local scaling
 827         applyResizeMode: function() {
 828             if (!UI.rfb) return;
 829
 830             var screen = UI.screenSize();
 831
 832             if (screen && UI.rfb_state === 'normal' && UI.rfb.get_display()) {
 833
 834                 var display = UI.rfb.get_display();
 835                 var resizeMode = UI.getSetting('resize');
 836
 837                 if (resizeMode === 'remote') {
 838
 839                     // Request changing the resolution of the remote display to
 840                     // the size of the local browser viewport.
 841
 842                     // In order to not send multiple requests before the browser-resize
 843                     // is finished we wait 0.5 seconds before sending the request.
 844                     clearTimeout(UI.resizeTimeout);
 845                     UI.resizeTimeout = setTimeout(function(){
 846
 847                         // Limit the viewport to the size of the browser window
 848                         display.set_maxWidth(screen.w);
 849                         display.set_maxHeight(screen.h);
 850
 851                         Util.Debug('Attempting requestDesktopSize(' +
 852                                    screen.w + ', ' + screen.h + ')');
 853
 854                         // Request a remote size covering the viewport
 855                         UI.rfb.requestDesktopSize(screen.w, screen.h);
 856                     }, 500);
 857
 858                 } else if (resizeMode === 'scale' || resizeMode === 'downscale') {
 859                     var downscaleOnly = resizeMode === 'downscale';
 860                     var scaleRatio = display.autoscale(screen.w, screen.h, downscaleOnly);
 861                     UI.rfb.get_mouse().set_scale(scaleRatio);
 862                     Util.Debug('Scaling by ' + UI.rfb.get_mouse().get_scale());
 863                 }
 864             }
 865         },
 866
 867         // The screen is always the same size as the available viewport
 868         // in the browser window minus the height of the control bar
 869         screenSize: function() {
 870             var screen = document.getElementById('noVNC_screen');
 871
 872             // Hide the scrollbars until the size is calculated
 873             screen.style.overflow = "hidden";
 874
 875             var pos = Util.getPosition(screen);
 876             var w = pos.width;
 877             var h = pos.height;
 878
 879             screen.style.overflow = "visible";
 880
 881             if (isNaN(w) || isNaN(h)) {
 882                 return false;
 883             } else {
 884                 return {w: w, h: h};
 885             }
 886         },
 887
 888         // Normally we only apply the current resize mode after a window resize
 889         // event. This means that when a new connection is opened, there is no
 890         // resize mode active.
 891         // We have to wait until the first FBU because this is where the client
 892         // will find the supported encodings of the server. Some calls later in
 893         // the chain is dependant on knowing the server-capabilities.
 894         initialResize: function(rfb, fbu) {
 895             UI.applyResizeMode();
 896             // After doing this once, we remove the callback.
 897             UI.rfb.set_onFBUComplete(function() { });
 898         },
 899
 900 /* ------^-------
 901  *    /RESIZE
 902  * ==============
 903  *    CLIPPING
 904  * ------v------*/
 905
 906         // Set and configure viewport clipping
 907         setViewClip: function(clip) {
 908             var display;
 909             if (UI.rfb) {
 910                 display = UI.rfb.get_display();
 911             } else {
 912                 UI.forceSetting('clip', clip);
 913                 return;
 914             }
 915
 916             var cur_clip = display.get_viewport();
 917
 918             if (typeof(clip) !== 'boolean') {
 919                 // Use current setting
 920                 clip = UI.getSetting('clip');
 921             }
 922
 923             if (clip && !cur_clip) {
 924                 // Turn clipping on
 925                 UI.updateSetting('clip', true);
 926             } else if (!clip && cur_clip) {
 927                 // Turn clipping off
 928                 UI.updateSetting('clip', false);
 929                 display.set_viewport(false);
 930                 // Disable max dimensions
 931                 display.set_maxWidth(0);
 932                 display.set_maxHeight(0);
 933                 display.viewportChangeSize();
 934             }
 935             if (UI.getSetting('clip')) {
 936                 // If clipping, update clipping settings
 937                 display.set_viewport(true);
 938
 939                 var size = UI.screenSize();
 940                 if (size) {
 941                     display.set_maxWidth(size.w);
 942                     display.set_maxHeight(size.h);
 943
 944                     // Hide potential scrollbars that can skew the position
 945                     document.getElementById('noVNC_screen').style.overflow = "hidden";
 946
 947                     // The x position marks the left margin of the canvas,
 948                     // remove the margin from both sides to keep it centered
 949                     var new_w = size.w - (2 * Util.getPosition(document.getElementById('noVNC_canvas')).x);
 950
 951                     document.getElementById('noVNC_screen').style.overflow = "visible";
 952
 953                     display.viewportChangeSize(new_w, size.h);
 954                 }
 955             }
 956         },
 957
 958         // Handle special cases where clipping is forced on/off or locked
 959         enableDisableViewClip: function() {
 960             var resizeSetting = document.getElementById('noVNC_setting_resize');
 961             var connected = UI.rfb && UI.rfb_state === 'normal';
 962
 963             if (UI.isSafari) {
 964                 // Safari auto-hides the scrollbars which makes them
 965                 // impossible to use in most cases
 966                 UI.setViewClip(true);
 967                 document.getElementById('noVNC_setting_clip').disabled = true;
 968             } else if (resizeSetting.value === 'downscale' || resizeSetting.value === 'scale') {
 969                 // Disable clipping if we are scaling
 970                 UI.setViewClip(false);
 971                 document.getElementById('noVNC_setting_clip').disabled = true;
 972             } else if (document.msFullscreenElement) {
 973                 // The browser is IE and we are in fullscreen mode.
 974                 // - We need to force clipping while in fullscreen since
 975                 //   scrollbars doesn't work.
 976                 UI.popupStatus("Forcing clipping mode since scrollbars aren't supported by IE in fullscreen");
 977                 UI.rememberedClipSetting = UI.getSetting('clip');
 978                 UI.setViewClip(true);
 979                 document.getElementById('noVNC_setting_clip').disabled = true;
 980             } else if (document.body.msRequestFullscreen && UI.rememberedClip !== null) {
 981                 // Restore view clip to what it was before fullscreen on IE
 982                 UI.setViewClip(UI.rememberedClipSetting);
 983                 document.getElementById('noVNC_setting_clip').disabled = connected || UI.isTouchDevice;
 984             } else {
 985                 document.getElementById('noVNC_setting_clip').disabled = connected || UI.isTouchDevice;
 986                 if (UI.isTouchDevice) {
 987                     UI.setViewClip(true);
 988                 }
 989             }
 990         },
 991
 992 /* ------^-------
 993  *   /CLIPPING
 994  * ==============
 995  *    VIEWDRAG
 996  * ------v------*/
 997
 998         // Update the viewport drag state
 999         updateViewDrag: function(drag) {
1000             if (!UI.rfb) return;
1001
1002             var viewDragButton = document.getElementById('noVNC_view_drag_button');
1003
1004             // Check if viewport drag is possible. It is only possible
1005             // if the remote display is clipping the client display.
1006             if (UI.rfb_state === 'normal' &&
1007                 UI.rfb.get_display().get_viewport() &&
1008                 UI.rfb.get_display().clippingDisplay()) {
1009
1010                 viewDragButton.style.display = "inline";
1011                 viewDragButton.disabled = false;
1012
1013             } else {
1014                 // The size of the remote display is the same or smaller
1015                 // than the client display. Make sure viewport drag isn't
1016                 // active when it can't be used.
1017                 if (UI.rfb.get_viewportDrag) {
1018                     viewDragButton.className = "noVNC_status_button";
1019                     UI.rfb.set_viewportDrag(false);
1020                 }
1021
1022                 // The button is disabled instead of hidden on touch devices
1023                 if (UI.rfb_state === 'normal' && UI.isTouchDevice) {
1024                     viewDragButton.style.display = "inline";
1025                     viewDragButton.disabled = true;
1026                 } else {
1027                     viewDragButton.style.display = "none";
1028                 }
1029                 return;
1030             }
1031
1032             if (typeof(drag) !== "undefined" &&
1033                 typeof(drag) !== "object") {
1034                 if (drag) {
1035                     viewDragButton.className = "noVNC_status_button_selected";
1036                     UI.rfb.set_viewportDrag(true);
1037                 } else {
1038                     viewDragButton.className = "noVNC_status_button";
1039                     UI.rfb.set_viewportDrag(false);
1040                 }
1041             }
1042         },
1043
1044         toggleViewDrag: function() {
1045             if (!UI.rfb) return;
1046
1047             var viewDragButton = document.getElementById('noVNC_view_drag_button');
1048             if (UI.rfb.get_viewportDrag()) {
1049                 viewDragButton.className = "noVNC_status_button";
1050                 UI.rfb.set_viewportDrag(false);
1051             } else {
1052                 viewDragButton.className = "noVNC_status_button_selected";
1053                 UI.rfb.set_viewportDrag(true);
1054             }
1055         },
1056
1057 /* ------^-------
1058  *   /VIEWDRAG
1059  * ==============
1060  *    KEYBOARD
1061  * ------v------*/
1062
1063         // On touch devices, show the OS keyboard
1064         showKeyboard: function() {
1065             var kbi = document.getElementById('noVNC_keyboardinput');
1066             var skb = document.getElementById('noVNC_keyboard_button');
1067             var l = kbi.value.length;
1068             if(UI.keyboardVisible === false) {
1069                 kbi.focus();
1070                 try { kbi.setSelectionRange(l, l); } // Move the caret to the end
1071                 catch (err) {} // setSelectionRange is undefined in Google Chrome
1072                 UI.keyboardVisible = true;
1073                 skb.className = "noVNC_status_button_selected";
1074             } else if(UI.keyboardVisible === true) {
1075                 kbi.blur();
1076                 skb.className = "noVNC_status_button";
1077                 UI.keyboardVisible = false;
1078             }
1079         },
1080
1081         hideKeyboard: function() {
1082             document.getElementById('noVNC_keyboard_button').className = "noVNC_status_button";
1083             //Weird bug in iOS if you change keyboardVisible
1084             //here it does not actually occur so next time
1085             //you click keyboard icon it doesnt work.
1086             UI.hideKeyboardTimeout = setTimeout(function() {
1087                 UI.keyboardVisible = false;
1088             },100);
1089         },
1090
1091         keepKeyboard: function() {
1092             clearTimeout(UI.hideKeyboardTimeout);
1093             if(UI.keyboardVisible === true) {
1094                 document.getElementById('noVNC_keyboardinput').focus();
1095                 document.getElementById('noVNC_keyboard_button').className = "noVNC_status_button_selected";
1096             } else if(UI.keyboardVisible === false) {
1097                 document.getElementById('noVNC_keyboardinput').blur();
1098                 document.getElementById('noVNC_keyboard_button').className = "noVNC_status_button";
1099             }
1100         },
1101
1102         keyboardinputReset: function() {
1103             var kbi = document.getElementById('noVNC_keyboardinput');
1104             kbi.value = new Array(UI.defaultKeyboardinputLen).join("_");
1105             UI.lastKeyboardinput = kbi.value;
1106         },
1107
1108         // When normal keyboard events are left uncought, use the input events from
1109         // the keyboardinput element instead and generate the corresponding key events.
1110         // This code is required since some browsers on Android are inconsistent in
1111         // sending keyCodes in the normal keyboard events when using on screen keyboards.
1112         keyInput: function(event) {
1113
1114             if (!UI.rfb) return;
1115
1116             var newValue = event.target.value;
1117
1118             if (!UI.lastKeyboardinput) {
1119                 UI.keyboardinputReset();
1120             }
1121             var oldValue = UI.lastKeyboardinput;
1122
1123             var newLen;
1124             try {
1125                 // Try to check caret position since whitespace at the end
1126                 // will not be considered by value.length in some browsers
1127                 newLen = Math.max(event.target.selectionStart, newValue.length);
1128             } catch (err) {
1129                 // selectionStart is undefined in Google Chrome
1130                 newLen = newValue.length;
1131             }
1132             var oldLen = oldValue.length;
1133
1134             var backspaces;
1135             var inputs = newLen - oldLen;
1136             if (inputs < 0) {
1137                 backspaces = -inputs;
1138             } else {
1139                 backspaces = 0;
1140             }
1141
1142             // Compare the old string with the new to account for
1143             // text-corrections or other input that modify existing text
1144             var i;
1145             for (i = 0; i < Math.min(oldLen, newLen); i++) {
1146                 if (newValue.charAt(i) != oldValue.charAt(i)) {
1147                     inputs = newLen - i;
1148                     backspaces = oldLen - i;
1149                     break;
1150                 }
1151             }
1152
1153             // Send the key events
1154             for (i = 0; i < backspaces; i++) {
1155                 UI.rfb.sendKey(KeyTable.XK_BackSpace);
1156             }
1157             for (i = newLen - inputs; i < newLen; i++) {
1158                 UI.rfb.sendKey(newValue.charCodeAt(i));
1159             }
1160
1161             // Control the text content length in the keyboardinput element
1162             if (newLen > 2 * UI.defaultKeyboardinputLen) {
1163                 UI.keyboardinputReset();
1164             } else if (newLen < 1) {
1165                 // There always have to be some text in the keyboardinput
1166                 // element with which backspace can interact.
1167                 UI.keyboardinputReset();
1168                 // This sometimes causes the keyboard to disappear for a second
1169                 // but it is required for the android keyboard to recognize that
1170                 // text has been added to the field
1171                 event.target.blur();
1172                 // This has to be ran outside of the input handler in order to work
1173                 setTimeout(UI.keepKeyboard, 0);
1174             } else {
1175                 UI.lastKeyboardinput = newValue;
1176             }
1177         },
1178
1179         toggleExtraKeys: function() {
1180             UI.keepKeyboard();
1181             if(UI.extraKeysVisible === false) {
1182                 document.getElementById('noVNC_toggleCtrl_button').style.display = "inline";
1183                 document.getElementById('noVNC_toggleAlt_button').style.display = "inline";
1184                 document.getElementById('noVNC_sendTab_button').style.display = "inline";
1185                 document.getElementById('noVNC_sendEsc_button').style.display = "inline";
1186                 document.getElementById('noVNC_toggleExtraKeys_button').className = "noVNC_status_button_selected";
1187                 UI.extraKeysVisible = true;
1188             } else if(UI.extraKeysVisible === true) {
1189                 document.getElementById('noVNC_toggleCtrl_button').style.display = "";
1190                 document.getElementById('noVNC_toggleAlt_button').style.display = "";
1191                 document.getElementById('noVNC_sendTab_button').style.display = "";
1192                 document.getElementById('noVNC_sendEsc_button').style.display = "";
1193                 document.getElementById('noVNC_toggleExtraKeys_button').className = "noVNC_status_button";
1194                 UI.extraKeysVisible = false;
1195             }
1196         },
1197
1198         sendEsc: function() {
1199             UI.keepKeyboard();
1200             UI.rfb.sendKey(KeyTable.XK_Escape);
1201         },
1202
1203         sendTab: function() {
1204             UI.keepKeyboard();
1205             UI.rfb.sendKey(KeyTable.XK_Tab);
1206         },
1207
1208         toggleCtrl: function() {
1209             UI.keepKeyboard();
1210             if(UI.ctrlOn === false) {
1211                 UI.rfb.sendKey(KeyTable.XK_Control_L, true);
1212                 document.getElementById('noVNC_toggleCtrl_button').className = "noVNC_status_button_selected";
1213                 UI.ctrlOn = true;
1214             } else if(UI.ctrlOn === true) {
1215                 UI.rfb.sendKey(KeyTable.XK_Control_L, false);
1216                 document.getElementById('noVNC_toggleCtrl_button').className = "noVNC_status_button";
1217                 UI.ctrlOn = false;
1218             }
1219         },
1220
1221         toggleAlt: function() {
1222             UI.keepKeyboard();
1223             if(UI.altOn === false) {
1224                 UI.rfb.sendKey(KeyTable.XK_Alt_L, true);
1225                 document.getElementById('noVNC_toggleAlt_button').className = "noVNC_status_button_selected";
1226                 UI.altOn = true;
1227             } else if(UI.altOn === true) {
1228                 UI.rfb.sendKey(KeyTable.XK_Alt_L, false);
1229                 document.getElementById('noVNC_toggleAlt_button').className = "noVNC_status_button";
1230                 UI.altOn = false;
1231             }
1232         },
1233
1234         sendCtrlAltDel: function() {
1235             UI.rfb.sendCtrlAltDel();
1236         },
1237
1238 /* ------^-------
1239  *   /KEYBOARD
1240  * ==============
1241  *     MISC
1242  * ------v------*/
1243
1244         setMouseButton: function(num) {
1245             if (typeof num === 'undefined') {
1246                 // Disable mouse buttons
1247                 num = -1;
1248             }
1249             if (UI.rfb) {
1250                 UI.rfb.get_mouse().set_touchButton(num);
1251             }
1252
1253             var blist = [0, 1,2,4];
1254             for (var b = 0; b < blist.length; b++) {
1255                 var button = document.getElementById('noVNC_mouse_button' + blist[b]);
1256                 if (blist[b] === num) {
1257                     button.style.display = "";
1258                 } else {
1259                     button.style.display = "none";
1260                 }
1261             }
1262         },
1263
1264         displayBlur: function() {
1265             if (!UI.rfb) return;
1266
1267             UI.rfb.get_keyboard().set_focused(false);
1268             UI.rfb.get_mouse().set_focused(false);
1269         },
1270
1271         displayFocus: function() {
1272             if (!UI.rfb) return;
1273
1274             UI.rfb.get_keyboard().set_focused(true);
1275             UI.rfb.get_mouse().set_focused(true);
1276         },
1277
1278         // Display the desktop name in the document title
1279         updateDocumentTitle: function(rfb, name) {
1280             document.title = name + " - noVNC";
1281         },
1282
1283         //Helper to add options to dropdown.
1284         addOption: function(selectbox, text, value) {
1285             var optn = document.createElement("OPTION");
1286             optn.text = text;
1287             optn.value = value;
1288             selectbox.options.add(optn);
1289         },
1290
1291         setBarPosition: function() {
1292             document.getElementById('noVNC_control_bar').style.top = (window.pageYOffset) + 'px';
1293             document.getElementById('noVNC_mobile_buttons').style.left = (window.pageXOffset) + 'px';
1294
1295             var vncwidth = document.getElementById('noVNC_container').style.offsetWidth;
1296             document.getElementById('noVNC_control_bar').style.width = vncwidth + 'px';
1297         }
1298
1299 /* ------^-------
1300  *    /MISC
1301  * ==============
1302  */
1303     };
1304
1305     /* [module] UI.load(); */
1306 })();
1307
1308 /* [module] export default UI; */