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  * Copyright (C) 2016 Pierre Ossman for Cendio AB
   6  * Licensed under MPL 2.0 (see LICENSE.txt)
   7  *
   8  * See README.md for usage and integration instructions.
   9  */
  10
  11 /* jslint white: false, browser: true */
  12 /* global window, document.getElementById, Util, WebUtil, RFB, Display */
  13
  14 /* [module]
  15  * import Util from "../core/util";
  16  * import KeyTable from "../core/input/keysym";
  17  * import keysyms from "./keysymdef";
  18  * import RFB from "../core/rfb";
  19  * import Display from "../core/display";
  20  * import WebUtil from "./webutil";
  21  */
  22
  23 var UI;
  24
  25 (function () {
  26     "use strict";
  27
  28     // Fallback for all uncought errors
  29     window.addEventListener('error', function(event) {
  30         try {
  31             var msg = "";
  32
  33             msg += "<div>";
  34             msg += event.message;
  35             msg += "</div>";
  36
  37             msg += " <div class=\"noVNC_location\">";
  38             msg += event.filename;
  39             msg += ":" + event.lineno + ":" + event.colno;
  40             msg += "</div>";
  41
  42             if ((event.error !== undefined) &&
  43                 (event.error.stack !== undefined)) {
  44                 msg += "<div class=\"noVNC_stack\">";
  45                 msg += event.error.stack;
  46                 msg += "</div>";
  47             }
  48
  49             document.getElementById('noVNC_fallback_error')
  50                 .classList.add("noVNC_open");
  51             document.getElementById('noVNC_fallback_errormsg').innerHTML = msg;
  52         } catch (exc) {
  53             document.write("noVNC encountered an error.");
  54         }
  55         // Don't return true since this would prevent the error
  56         // from being printed to the browser console.
  57         return false;
  58     });
  59
  60     // Set up translations
  61     var LINGUAS = ["de", "el", "nl", "sv"];
  62     Util.Localisation.setup(LINGUAS);
  63     if (Util.Localisation.language !== "en") {
  64         WebUtil.load_scripts(
  65             {'app': ["locale/" + Util.Localisation.language + ".js"]});
  66     }
  67
  68     /* [begin skip-as-module] */
  69     // Load supporting scripts
  70     WebUtil.load_scripts(
  71         {'core': ["base64.js", "websock.js", "des.js", "input/keysymdef.js",
  72                   "input/xtscancodes.js", "input/util.js", "input/devices.js",
  73                   "display.js", "inflator.js", "rfb.js", "input/keysym.js"]});
  74
  75     window.onscriptsload = function () { UI.load(); };
  76     /* [end skip-as-module] */
  77
  78     var _ = Util.Localisation.get;
  79
  80     UI = {
  81
  82         connected: false,
  83         desktopName: "",
  84
  85         resizeTimeout: null,
  86         statusTimeout: null,
  87         hideKeyboardTimeout: null,
  88         idleControlbarTimeout: null,
  89         closeControlbarTimeout: null,
  90
  91         controlbarGrabbed: false,
  92         controlbarDrag: false,
  93         controlbarMouseDownClientY: 0,
  94         controlbarMouseDownOffsetY: 0,
  95
  96         isSafari: false,
  97         rememberedClipSetting: null,
  98         lastKeyboardinput: null,
  99         defaultKeyboardinputLen: 100,
 100
 101         // Setup rfb object, load settings from browser storage, then call
 102         // UI.init to setup the UI/menus
 103         load: function(callback) {
 104             WebUtil.initSettings(UI.start, callback);
 105         },
 106
 107         // Render default UI and initialize settings menu
 108         start: function(callback) {
 109
 110             // Setup global variables first
 111             UI.isSafari = (navigator.userAgent.indexOf('Safari') !== -1 &&
 112                            navigator.userAgent.indexOf('Chrome') === -1);
 113
 114             UI.initSettings();
 115
 116             // Translate the DOM
 117             Util.Localisation.translateDOM();
 118
 119             // Adapt the interface for touch screen devices
 120             if (Util.isTouchDevice) {
 121                 document.documentElement.classList.add("noVNC_touch");
 122                 // Remove the address bar
 123                 setTimeout(function() { window.scrollTo(0, 1); }, 100);
 124                 UI.forceSetting('clip', true);
 125             } else {
 126                 UI.initSetting('clip', false);
 127             }
 128
 129             // Restore control bar position
 130             if (WebUtil.readSetting('controlbar_pos') === 'right') {
 131                 UI.toggleControlbarSide();
 132             }
 133
 134             // Setup and initialize event handlers
 135             UI.setupWindowEvents();
 136             UI.setupFullscreen();
 137             UI.addControlbarHandlers();
 138             UI.addTouchSpecificHandlers();
 139             UI.addExtraKeysHandlers();
 140             UI.addXvpHandlers();
 141             UI.addConnectionControlHandlers();
 142             UI.addClipboardHandlers();
 143             UI.addSettingsHandlers();
 144
 145             // Show the connect panel on first load unless autoconnecting
 146             if (!autoconnect) {
 147                 UI.openConnectPanel();
 148             }
 149
 150             UI.updateViewClip();
 151
 152             UI.updateVisualState();
 153
 154             document.getElementById('noVNC_setting_host').focus();
 155
 156             var autoconnect = WebUtil.getConfigVar('autoconnect', false);
 157             if (autoconnect === 'true' || autoconnect == '1') {
 158                 autoconnect = true;
 159                 UI.connect();
 160             } else {
 161                 autoconnect = false;
 162             }
 163
 164             if (typeof callback === "function") {
 165                 callback(UI.rfb);
 166             }
 167         },
 168
 169         initSettings: function() {
 170             // Stylesheet selection dropdown
 171             var sheet = WebUtil.selectStylesheet();
 172             var sheets = WebUtil.getStylesheets();
 173             var i;
 174             for (i = 0; i < sheets.length; i += 1) {
 175                 UI.addOption(document.getElementById('noVNC_setting_stylesheet'),sheets[i].title, sheets[i].title);
 176             }
 177
 178             // Logging selection dropdown
 179             var llevels = ['error', 'warn', 'info', 'debug'];
 180             for (i = 0; i < llevels.length; i += 1) {
 181                 UI.addOption(document.getElementById('noVNC_setting_logging'),llevels[i], llevels[i]);
 182             }
 183
 184             // Settings with immediate effects
 185             UI.initSetting('logging', 'warn');
 186             WebUtil.init_logging(UI.getSetting('logging'));
 187
 188             UI.initSetting('stylesheet', 'default');
 189             WebUtil.selectStylesheet(null);
 190             // call twice to get around webkit bug
 191             WebUtil.selectStylesheet(UI.getSetting('stylesheet'));
 192
 193             // if port == 80 (or 443) then it won't be present and should be
 194             // set manually
 195             var port = window.location.port;
 196             if (!port) {
 197                 if (window.location.protocol.substring(0,5) == 'https') {
 198                     port = 443;
 199                 }
 200                 else if (window.location.protocol.substring(0,4) == 'http') {
 201                     port = 80;
 202                 }
 203             }
 204
 205             /* Populate the controls if defaults are provided in the URL */
 206             UI.initSetting('host', window.location.hostname);
 207             UI.initSetting('port', port);
 208             UI.initSetting('password', '');
 209             UI.initSetting('encrypt', (window.location.protocol === "https:"));
 210             UI.initSetting('true_color', true);
 211             UI.initSetting('cursor', !Util.isTouchDevice);
 212             UI.initSetting('resize', 'off');
 213             UI.initSetting('shared', true);
 214             UI.initSetting('view_only', false);
 215             UI.initSetting('path', 'websockify');
 216             UI.initSetting('repeaterID', '');
 217             UI.initSetting('token', '');
 218         },
 219
 220         setupWindowEvents: function() {
 221             window.addEventListener('resize', UI.applyResizeMode);
 222             window.addEventListener('resize', UI.updateViewClip);
 223             window.addEventListener('resize', UI.updateViewDrag);
 224
 225             document.getElementById("noVNC_status")
 226                 .addEventListener('click', UI.hideStatus);
 227         },
 228
 229         setupFullscreen: function() {
 230             // Only show the button if fullscreen is properly supported
 231             // * Safari doesn't support alphanumerical input while in fullscreen
 232             if (!UI.isSafari &&
 233                 (document.documentElement.requestFullscreen ||
 234                  document.documentElement.mozRequestFullScreen ||
 235                  document.documentElement.webkitRequestFullscreen ||
 236                  document.body.msRequestFullscreen)) {
 237                 document.getElementById('noVNC_fullscreen_button')
 238                     .classList.remove("noVNC_hidden");
 239                 UI.addFullscreenHandlers();
 240             }
 241         },
 242
 243         addControlbarHandlers: function() {
 244             document.getElementById("noVNC_control_bar")
 245                 .addEventListener('mousemove', UI.activateControlbar);
 246             document.getElementById("noVNC_control_bar")
 247                 .addEventListener('mouseup', UI.activateControlbar);
 248             document.getElementById("noVNC_control_bar")
 249                 .addEventListener('mousedown', UI.activateControlbar);
 250             document.getElementById("noVNC_control_bar")
 251                 .addEventListener('keypress', UI.activateControlbar);
 252
 253             document.getElementById("noVNC_control_bar")
 254                 .addEventListener('mousedown', UI.keepControlbar);
 255             document.getElementById("noVNC_control_bar")
 256                 .addEventListener('keypress', UI.keepControlbar);
 257
 258             document.getElementById("noVNC_view_drag_button")
 259                 .addEventListener('click', UI.toggleViewDrag);
 260
 261             document.getElementById("noVNC_control_bar_handle")
 262                 .addEventListener('mousedown', UI.controlbarHandleMouseDown);
 263             document.getElementById("noVNC_control_bar_handle")
 264                 .addEventListener('mouseup', UI.controlbarHandleMouseUp);
 265             document.getElementById("noVNC_control_bar_handle")
 266                 .addEventListener('mousemove', UI.dragControlbarHandle);
 267             // resize events aren't available for elements
 268             window.addEventListener('resize', UI.updateControlbarHandle);
 269         },
 270
 271         addTouchSpecificHandlers: function() {
 272             document.getElementById("noVNC_mouse_button0")
 273                 .addEventListener('click', function () { UI.setMouseButton(1); });
 274             document.getElementById("noVNC_mouse_button1")
 275                 .addEventListener('click', function () { UI.setMouseButton(2); });
 276             document.getElementById("noVNC_mouse_button2")
 277                 .addEventListener('click', function () { UI.setMouseButton(4); });
 278             document.getElementById("noVNC_mouse_button4")
 279                 .addEventListener('click', function () { UI.setMouseButton(0); });
 280             document.getElementById("noVNC_keyboard_button")
 281                 .addEventListener('click', UI.toggleVirtualKeyboard);
 282
 283             document.getElementById("noVNC_keyboardinput")
 284                 .addEventListener('input', UI.keyInput);
 285             document.getElementById("noVNC_keyboardinput")
 286                 .addEventListener('focus', UI.onfocusVirtualKeyboard);
 287             document.getElementById("noVNC_keyboardinput")
 288                 .addEventListener('blur', UI.onblurVirtualKeyboard);
 289             document.getElementById("noVNC_keyboardinput")
 290                 .addEventListener('submit', function () { return false; });
 291
 292             document.documentElement
 293                 .addEventListener('mousedown', UI.keepVirtualKeyboard, true);
 294
 295             document.getElementById("noVNC_control_bar")
 296                 .addEventListener('touchstart', UI.activateControlbar);
 297             document.getElementById("noVNC_control_bar")
 298                 .addEventListener('touchmove', UI.activateControlbar);
 299             document.getElementById("noVNC_control_bar")
 300                 .addEventListener('touchend', UI.activateControlbar);
 301             document.getElementById("noVNC_control_bar")
 302                 .addEventListener('input', UI.activateControlbar);
 303
 304             document.getElementById("noVNC_control_bar")
 305                 .addEventListener('touchstart', UI.keepControlbar);
 306             document.getElementById("noVNC_control_bar")
 307                 .addEventListener('input', UI.keepControlbar);
 308
 309             document.getElementById("noVNC_control_bar_handle")
 310                 .addEventListener('touchstart', UI.controlbarHandleMouseDown);
 311             document.getElementById("noVNC_control_bar_handle")
 312                 .addEventListener('touchend', UI.controlbarHandleMouseUp);
 313             document.getElementById("noVNC_control_bar_handle")
 314                 .addEventListener('touchmove', UI.dragControlbarHandle);
 315
 316             window.addEventListener('load', UI.keyboardinputReset);
 317         },
 318
 319         addExtraKeysHandlers: function() {
 320             document.getElementById("noVNC_toggle_extra_keys_button")
 321                 .addEventListener('click', UI.toggleExtraKeys);
 322             document.getElementById("noVNC_toggle_ctrl_button")
 323                 .addEventListener('click', UI.toggleCtrl);
 324             document.getElementById("noVNC_toggle_alt_button")
 325                 .addEventListener('click', UI.toggleAlt);
 326             document.getElementById("noVNC_send_tab_button")
 327                 .addEventListener('click', UI.sendTab);
 328             document.getElementById("noVNC_send_esc_button")
 329                 .addEventListener('click', UI.sendEsc);
 330             document.getElementById("noVNC_send_ctrl_alt_del_button")
 331                 .addEventListener('click', UI.sendCtrlAltDel);
 332         },
 333
 334         addXvpHandlers: function() {
 335             document.getElementById("noVNC_xvp_shutdown_button")
 336                 .addEventListener('click', function() { UI.rfb.xvpShutdown(); });
 337             document.getElementById("noVNC_xvp_reboot_button")
 338                 .addEventListener('click', function() { UI.rfb.xvpReboot(); });
 339             document.getElementById("noVNC_xvp_reset_button")
 340                 .addEventListener('click', function() { UI.rfb.xvpReset(); });
 341             document.getElementById("noVNC_xvp_button")
 342                 .addEventListener('click', UI.toggleXvpPanel);
 343         },
 344
 345         addConnectionControlHandlers: function() {
 346             document.getElementById("noVNC_connect_controls_button")
 347                 .addEventListener('click', UI.toggleConnectPanel);
 348             document.getElementById("noVNC_disconnect_button")
 349                 .addEventListener('click', UI.disconnect);
 350             document.getElementById("noVNC_connect_button")
 351                 .addEventListener('click', UI.connect);
 352
 353             document.getElementById("noVNC_password_button")
 354                 .addEventListener('click', UI.setPassword);
 355         },
 356
 357         addClipboardHandlers: function() {
 358             document.getElementById("noVNC_clipboard_button")
 359                 .addEventListener('click', UI.toggleClipboardPanel);
 360             document.getElementById("noVNC_clipboard_text")
 361                 .addEventListener('focus', UI.displayBlur);
 362             document.getElementById("noVNC_clipboard_text")
 363                 .addEventListener('blur', UI.displayFocus);
 364             document.getElementById("noVNC_clipboard_text")
 365                 .addEventListener('change', UI.clipboardSend);
 366             document.getElementById("noVNC_clipboard_clear_button")
 367                 .addEventListener('click', UI.clipboardClear);
 368         },
 369
 370         addSettingsHandlers: function() {
 371             document.getElementById("noVNC_settings_button")
 372                 .addEventListener('click', UI.toggleSettingsPanel);
 373             document.getElementById("noVNC_settings_apply")
 374                 .addEventListener('click', UI.settingsApply);
 375
 376             document.getElementById("noVNC_setting_resize")
 377                 .addEventListener('change', UI.enableDisableViewClip);
 378         },
 379
 380         addFullscreenHandlers: function() {
 381             document.getElementById("noVNC_fullscreen_button")
 382                 .addEventListener('click', UI.toggleFullscreen);
 383
 384             window.addEventListener('fullscreenchange', UI.updateFullscreenButton);
 385             window.addEventListener('mozfullscreenchange', UI.updateFullscreenButton);
 386             window.addEventListener('webkitfullscreenchange', UI.updateFullscreenButton);
 387             window.addEventListener('msfullscreenchange', UI.updateFullscreenButton);
 388         },
 389
 390         initRFB: function() {
 391             try {
 392                 UI.rfb = new RFB({'target': document.getElementById('noVNC_canvas'),
 393                                   'onNotification': UI.notification,
 394                                   'onUpdateState': UI.updateState,
 395                                   'onDisconnected': UI.disconnectFinished,
 396                                   'onPasswordRequired': UI.passwordRequired,
 397                                   'onXvpInit': UI.updateXvpButton,
 398                                   'onClipboard': UI.clipboardReceive,
 399                                   'onBell': UI.bell,
 400                                   'onFBUComplete': UI.initialResize,
 401                                   'onFBResize': UI.updateViewDrag,
 402                                   'onDesktopName': UI.updateDesktopName});
 403                 return true;
 404             } catch (exc) {
 405                 var msg = "Unable to create RFB client -- " + exc;
 406                 Util.Error(msg);
 407                 UI.showStatus(msg, 'error');
 408                 return false;
 409             }
 410         },
 411
 412 /* ------^-------
 413  *     /INIT
 414  * ==============
 415  *     VISUAL
 416  * ------v------*/
 417
 418         updateState: function(rfb, state, oldstate) {
 419             var msg;
 420
 421             document.documentElement.classList.remove("noVNC_connecting");
 422             document.documentElement.classList.remove("noVNC_connected");
 423             document.documentElement.classList.remove("noVNC_disconnecting");
 424
 425             switch (state) {
 426                 case 'connecting':
 427                     document.getElementById("noVNC_transition_text").innerHTML = _("Connecting...");
 428                     document.documentElement.classList.add("noVNC_connecting");
 429                     break;
 430                 case 'connected':
 431                     UI.connected = true;
 432                     document.documentElement.classList.add("noVNC_connected");
 433                     if (rfb && rfb.get_encrypt()) {
 434                         msg = _("Connected (encrypted) to ") + UI.desktopName;
 435                     } else {
 436                         msg = _("Connected (unencrypted) to ") + UI.desktopName;
 437                     }
 438                     UI.showStatus(msg);
 439                     break;
 440                 case 'disconnecting':
 441                     UI.connected = false;
 442                     document.getElementById("noVNC_transition_text").innerHTML = _("Disconnecting...");
 443                     document.documentElement.classList.add("noVNC_disconnecting");
 444                     break;
 445                 case 'disconnected':
 446                     UI.showStatus(_("Disconnected"));
 447                     break;
 448                 default:
 449                     msg = "Invalid UI state";
 450                     Util.Error(msg);
 451                     UI.showStatus(msg, 'error');
 452                     break;
 453             }
 454
 455             UI.updateVisualState();
 456         },
 457
 458         // Disable/enable controls depending on connection state
 459         updateVisualState: function() {
 460             //Util.Debug(">> updateVisualState");
 461             document.getElementById('noVNC_setting_encrypt').disabled = UI.connected;
 462             document.getElementById('noVNC_setting_true_color').disabled = UI.connected;
 463             if (Util.browserSupportsCursorURIs()) {
 464                 document.getElementById('noVNC_setting_cursor').disabled = UI.connected;
 465             } else {
 466                 UI.updateSetting('cursor', !Util.isTouchDevice);
 467                 document.getElementById('noVNC_setting_cursor').disabled = true;
 468             }
 469
 470             UI.enableDisableViewClip();
 471             document.getElementById('noVNC_setting_resize').disabled = UI.connected;
 472             document.getElementById('noVNC_setting_shared').disabled = UI.connected;
 473             document.getElementById('noVNC_setting_view_only').disabled = UI.connected;
 474             document.getElementById('noVNC_setting_path').disabled = UI.connected;
 475             document.getElementById('noVNC_setting_repeaterID').disabled = UI.connected;
 476
 477             if (UI.connected) {
 478                 UI.updateViewClip();
 479                 UI.setMouseButton(1);
 480
 481                 // Hide the controlbar after 2 seconds
 482                 UI.closeControlbarTimeout = setTimeout(UI.closeControlbar, 2000);
 483             } else {
 484                 UI.updateXvpButton(0);
 485                 UI.keepControlbar();
 486             }
 487
 488             // Hide input related buttons in view only mode
 489             if (UI.rfb && UI.rfb.get_view_only()) {
 490                 document.getElementById('noVNC_keyboard_button')
 491                     .classList.add('noVNC_hidden');
 492                 document.getElementById('noVNC_toggle_extra_keys_button')
 493                     .classList.add('noVNC_hidden');
 494             } else {
 495                 document.getElementById('noVNC_keyboard_button')
 496                     .classList.remove('noVNC_hidden');
 497                 document.getElementById('noVNC_toggle_extra_keys_button')
 498                     .classList.remove('noVNC_hidden');
 499             }
 500
 501             // State change disables viewport dragging.
 502             // It is enabled (toggled) by direct click on the button
 503             UI.setViewDrag(false);
 504
 505             // State change also closes the password dialog
 506             document.getElementById('noVNC_password_dlg')
 507                 .classList.remove('noVNC_open');
 508
 509             //Util.Debug("<< updateVisualState");
 510         },
 511
 512         showStatus: function(text, status_type, time) {
 513             var statusElem = document.getElementById('noVNC_status');
 514
 515             clearTimeout(UI.statusTimeout);
 516
 517             if (typeof status_type === 'undefined') {
 518                 status_type = 'normal';
 519             }
 520
 521             statusElem.classList.remove("noVNC_status_normal",
 522                                         "noVNC_status_warn",
 523                                         "noVNC_status_error");
 524
 525             switch (status_type) {
 526                 case 'warning':
 527                 case 'warn':
 528                     statusElem.classList.add("noVNC_status_warn");
 529                     break;
 530                 case 'error':
 531                     statusElem.classList.add("noVNC_status_error");
 532                     break;
 533                 case 'normal':
 534                 case 'info':
 535                 default:
 536                     statusElem.classList.add("noVNC_status_normal");
 537                     break;
 538             }
 539
 540             statusElem.innerHTML = text;
 541             statusElem.classList.add("noVNC_open");
 542
 543             // If no time was specified, show the status for 1.5 seconds
 544             if (typeof time === 'undefined') {
 545                 time = 1500;
 546             }
 547
 548             // Error messages do not timeout
 549             if (status_type !== 'error') {
 550                 UI.statusTimeout = window.setTimeout(UI.hideStatus, time);
 551             }
 552         },
 553
 554         hideStatus: function() {
 555             clearTimeout(UI.statusTimeout);
 556             document.getElementById('noVNC_status').classList.remove("noVNC_open");
 557         },
 558
 559         notification: function (rfb, msg, level, options) {
 560             UI.showStatus(msg, level);
 561         },
 562
 563         activateControlbar: function(event) {
 564             clearTimeout(UI.idleControlbarTimeout);
 565             // We manipulate the anchor instead of the actual control
 566             // bar in order to avoid creating new a stacking group
 567             document.getElementById('noVNC_control_bar_anchor')
 568                 .classList.remove("noVNC_idle");
 569             UI.idleControlbarTimeout = window.setTimeout(UI.idleControlbar, 2000);
 570         },
 571
 572         idleControlbar: function() {
 573             document.getElementById('noVNC_control_bar_anchor')
 574                 .classList.add("noVNC_idle");
 575         },
 576
 577         keepControlbar: function() {
 578             clearTimeout(UI.closeControlbarTimeout);
 579         },
 580
 581         openControlbar: function() {
 582             document.getElementById('noVNC_control_bar')
 583                 .classList.add("noVNC_open");
 584         },
 585
 586         closeControlbar: function() {
 587             UI.closeAllPanels();
 588             document.getElementById('noVNC_control_bar')
 589                 .classList.remove("noVNC_open");
 590         },
 591
 592         toggleControlbar: function() {
 593             if (document.getElementById('noVNC_control_bar')
 594                 .classList.contains("noVNC_open")) {
 595                 UI.closeControlbar();
 596             } else {
 597                 UI.openControlbar();
 598             }
 599         },
 600
 601         toggleControlbarSide: function () {
 602             // Temporarily disable animation to avoid weird movement
 603             var bar = document.getElementById('noVNC_control_bar');
 604             bar.style.transitionDuration = '0s';
 605             bar.addEventListener('transitionend', function () { this.style.transitionDuration = ""; });
 606
 607             var anchor = document.getElementById('noVNC_control_bar_anchor');
 608             if (anchor.classList.contains("noVNC_right")) {
 609                 WebUtil.writeSetting('controlbar_pos', 'left');
 610                 anchor.classList.remove("noVNC_right");
 611             } else {
 612                 WebUtil.writeSetting('controlbar_pos', 'right');
 613                 anchor.classList.add("noVNC_right");
 614             }
 615
 616             // Consider this a movement of the handle
 617             UI.controlbarDrag = true;
 618         },
 619
 620         dragControlbarHandle: function (e) {
 621             if (!UI.controlbarGrabbed) return;
 622
 623             var ptr = Util.getPointerEvent(e);
 624
 625             var anchor = document.getElementById('noVNC_control_bar_anchor');
 626             if (ptr.clientX < (window.innerWidth * 0.1)) {
 627                 if (anchor.classList.contains("noVNC_right")) {
 628                     UI.toggleControlbarSide();
 629                 }
 630             } else if (ptr.clientX > (window.innerWidth * 0.9)) {
 631                 if (!anchor.classList.contains("noVNC_right")) {
 632                     UI.toggleControlbarSide();
 633                 }
 634             }
 635
 636             if (!UI.controlbarDrag) {
 637                 // The goal is to trigger on a certain physical width, the
 638                 // devicePixelRatio brings us a bit closer but is not optimal.
 639                 var dragThreshold = 10 * (window.devicePixelRatio || 1);
 640                 var dragDistance = Math.abs(ptr.clientY - UI.controlbarMouseDownClientY);
 641
 642                 if (dragDistance < dragThreshold) return;
 643
 644                 UI.controlbarDrag = true;
 645             }
 646
 647             var eventY = ptr.clientY - UI.controlbarMouseDownOffsetY;
 648
 649             UI.moveControlbarHandle(eventY);
 650
 651             e.preventDefault();
 652             e.stopPropagation();
 653             UI.keepControlbar();
 654             UI.activateControlbar();
 655         },
 656
 657         // Move the handle but don't allow any position outside the bounds
 658         moveControlbarHandle: function (viewportRelativeY) {
 659             var handle = document.getElementById("noVNC_control_bar_handle");
 660             var handleHeight = handle.getBoundingClientRect().height;
 661             var controlbarBounds = document.getElementById("noVNC_control_bar")
 662                 .getBoundingClientRect();
 663             var margin = 10;
 664
 665             // These heights need to be non-zero for the below logic to work
 666             if (handleHeight === 0 || controlbarBounds.height === 0) {
 667                 return;
 668             }
 669
 670             var newY = viewportRelativeY;
 671
 672             // Check if the coordinates are outside the control bar
 673             if (newY < controlbarBounds.top + margin) {
 674                 // Force coordinates to be below the top of the control bar
 675                 newY = controlbarBounds.top + margin;
 676
 677             } else if (newY > controlbarBounds.top +
 678                        controlbarBounds.height - handleHeight - margin) {
 679                 // Force coordinates to be above the bottom of the control bar
 680                 newY = controlbarBounds.top +
 681                     controlbarBounds.height - handleHeight - margin;
 682             }
 683
 684             // Corner case: control bar too small for stable position
 685             if (controlbarBounds.height < (handleHeight + margin * 2)) {
 686                 newY = controlbarBounds.top +
 687                     (controlbarBounds.height - handleHeight) / 2;
 688             }
 689
 690             // The transform needs coordinates that are relative to the parent
 691             var parentRelativeY = newY - controlbarBounds.top;
 692             handle.style.transform = "translateY(" + parentRelativeY + "px)";
 693         },
 694
 695         updateControlbarHandle: function () {
 696             // Since the control bar is fixed on the viewport and not the page,
 697             // the move function expects coordinates relative the the viewport.
 698             var handle = document.getElementById("noVNC_control_bar_handle");
 699             var handleBounds = handle.getBoundingClientRect();
 700             UI.moveControlbarHandle(handleBounds.top);
 701         },
 702
 703         controlbarHandleMouseUp: function(e) {
 704             if ((e.type == "mouseup") && (e.button != 0)) return;
 705
 706             // mouseup and mousedown on the same place toggles the controlbar
 707             if (UI.controlbarGrabbed && !UI.controlbarDrag) {
 708                 UI.toggleControlbar();
 709                 e.preventDefault();
 710                 e.stopPropagation();
 711                 UI.keepControlbar();
 712                 UI.activateControlbar();
 713             }
 714             UI.controlbarGrabbed = false;
 715         },
 716
 717         controlbarHandleMouseDown: function(e) {
 718             if ((e.type == "mousedown") && (e.button != 0)) return;
 719
 720             var ptr = Util.getPointerEvent(e);
 721
 722             var handle = document.getElementById("noVNC_control_bar_handle");
 723             var bounds = handle.getBoundingClientRect();
 724
 725             WebUtil.setCapture(handle);
 726             UI.controlbarGrabbed = true;
 727             UI.controlbarDrag = false;
 728
 729             UI.controlbarMouseDownClientY = ptr.clientY;
 730             UI.controlbarMouseDownOffsetY = ptr.clientY - bounds.top;
 731             e.preventDefault();
 732             e.stopPropagation();
 733             UI.keepControlbar();
 734             UI.activateControlbar();
 735         },
 736
 737 /* ------^-------
 738  *    /VISUAL
 739  * ==============
 740  *    SETTINGS
 741  * ------v------*/
 742
 743         // Initial page load read/initialization of settings
 744         initSetting: function(name, defVal) {
 745             // Check Query string followed by cookie
 746             var val = WebUtil.getConfigVar(name);
 747             if (val === null) {
 748                 val = WebUtil.readSetting(name, defVal);
 749             }
 750             UI.updateSetting(name, val);
 751             return val;
 752         },
 753
 754         // Update cookie and form control setting. If value is not set, then
 755         // updates from control to current cookie setting.
 756         updateSetting: function(name, value) {
 757
 758             // Save the cookie for this session
 759             if (typeof value !== 'undefined') {
 760                 WebUtil.writeSetting(name, value);
 761             }
 762
 763             // Update the settings control
 764             value = UI.getSetting(name);
 765
 766             var ctrl = document.getElementById('noVNC_setting_' + name);
 767             if (ctrl.type === 'checkbox') {
 768                 ctrl.checked = value;
 769
 770             } else if (typeof ctrl.options !== 'undefined') {
 771                 for (var i = 0; i < ctrl.options.length; i += 1) {
 772                     if (ctrl.options[i].value === value) {
 773                         ctrl.selectedIndex = i;
 774                         break;
 775                     }
 776                 }
 777             } else {
 778                 /*Weird IE9 error leads to 'null' appearring
 779                 in textboxes instead of ''.*/
 780                 if (value === null) {
 781                     value = "";
 782                 }
 783                 ctrl.value = value;
 784             }
 785         },
 786
 787         // Save control setting to cookie
 788         saveSetting: function(name) {
 789             var val, ctrl = document.getElementById('noVNC_setting_' + name);
 790             if (ctrl.type === 'checkbox') {
 791                 val = ctrl.checked;
 792             } else if (typeof ctrl.options !== 'undefined') {
 793                 val = ctrl.options[ctrl.selectedIndex].value;
 794             } else {
 795                 val = ctrl.value;
 796             }
 797             WebUtil.writeSetting(name, val);
 798             //Util.Debug("Setting saved '" + name + "=" + val + "'");
 799             return val;
 800         },
 801
 802         // Force a setting to be a certain value
 803         forceSetting: function(name, val) {
 804             UI.updateSetting(name, val);
 805             return val;
 806         },
 807
 808         // Read form control compatible setting from cookie
 809         getSetting: function(name) {
 810             var ctrl = document.getElementById('noVNC_setting_' + name);
 811             var val = WebUtil.readSetting(name);
 812             if (typeof val !== 'undefined' && val !== null && ctrl.type === 'checkbox') {
 813                 if (val.toString().toLowerCase() in {'0':1, 'no':1, 'false':1}) {
 814                     val = false;
 815                 } else {
 816                     val = true;
 817                 }
 818             }
 819             return val;
 820         },
 821
 822         // Save/apply settings when 'Apply' button is pressed
 823         settingsApply: function() {
 824             //Util.Debug(">> settingsApply");
 825             UI.saveSetting('encrypt');
 826             UI.saveSetting('true_color');
 827             if (Util.browserSupportsCursorURIs()) {
 828                 UI.saveSetting('cursor');
 829             }
 830
 831             UI.saveSetting('resize');
 832
 833             if (UI.getSetting('resize') === 'downscale' || UI.getSetting('resize') === 'scale') {
 834                 UI.forceSetting('clip', false);
 835             }
 836
 837             UI.saveSetting('clip');
 838             UI.saveSetting('shared');
 839             UI.saveSetting('view_only');
 840             UI.saveSetting('path');
 841             UI.saveSetting('repeaterID');
 842             UI.saveSetting('stylesheet');
 843             UI.saveSetting('logging');
 844
 845             // Settings with immediate (non-connected related) effect
 846             WebUtil.selectStylesheet(UI.getSetting('stylesheet'));
 847             WebUtil.init_logging(UI.getSetting('logging'));
 848             UI.updateViewClip();
 849             UI.updateViewDrag();
 850             //Util.Debug("<< settingsApply");
 851         },
 852
 853 /* ------^-------
 854  *   /SETTINGS
 855  * ==============
 856  *    PANELS
 857  * ------v------*/
 858
 859         closeAllPanels: function() {
 860             UI.closeSettingsPanel();
 861             UI.closeXvpPanel();
 862             UI.closeClipboardPanel();
 863             UI.closeConnectPanel();
 864             UI.closeExtraKeys();
 865         },
 866
 867 /* ------^-------
 868  *   /PANELS
 869  * ==============
 870  * SETTINGS (panel)
 871  * ------v------*/
 872
 873         openSettingsPanel: function() {
 874             UI.closeAllPanels();
 875             UI.openControlbar();
 876
 877             UI.updateSetting('encrypt');
 878             UI.updateSetting('true_color');
 879             if (Util.browserSupportsCursorURIs()) {
 880                 UI.updateSetting('cursor');
 881             } else {
 882                 UI.updateSetting('cursor', !Util.isTouchDevice);
 883                 document.getElementById('noVNC_setting_cursor').disabled = true;
 884             }
 885             UI.updateSetting('clip');
 886             UI.updateSetting('resize');
 887             UI.updateSetting('shared');
 888             UI.updateSetting('view_only');
 889             UI.updateSetting('path');
 890             UI.updateSetting('repeaterID');
 891             UI.updateSetting('stylesheet');
 892             UI.updateSetting('logging');
 893
 894             document.getElementById('noVNC_settings')
 895                 .classList.add("noVNC_open");
 896             document.getElementById('noVNC_settings_button')
 897                 .classList.add("noVNC_selected");
 898         },
 899
 900         closeSettingsPanel: function() {
 901             document.getElementById('noVNC_settings')
 902                 .classList.remove("noVNC_open");
 903             document.getElementById('noVNC_settings_button')
 904                 .classList.remove("noVNC_selected");
 905         },
 906
 907         // Toggle the settings menu:
 908         //   On open, settings are refreshed from saved cookies.
 909         //   On close, settings are applied
 910         toggleSettingsPanel: function() {
 911             if (document.getElementById('noVNC_settings')
 912                 .classList.contains("noVNC_open")) {
 913                 UI.settingsApply();
 914                 UI.closeSettingsPanel();
 915             } else {
 916                 UI.openSettingsPanel();
 917             }
 918         },
 919
 920 /* ------^-------
 921  *   /SETTINGS
 922  * ==============
 923  *      XVP
 924  * ------v------*/
 925
 926         openXvpPanel: function() {
 927             UI.closeAllPanels();
 928             UI.openControlbar();
 929
 930             document.getElementById('noVNC_xvp')
 931                 .classList.add("noVNC_open");
 932             document.getElementById('noVNC_xvp_button')
 933                 .classList.add("noVNC_selected");
 934         },
 935
 936         closeXvpPanel: function() {
 937             document.getElementById('noVNC_xvp')
 938                 .classList.remove("noVNC_open");
 939             document.getElementById('noVNC_xvp_button')
 940                 .classList.remove("noVNC_selected");
 941         },
 942
 943         toggleXvpPanel: function() {
 944             if (document.getElementById('noVNC_xvp')
 945                 .classList.contains("noVNC_open")) {
 946                 UI.closeXvpPanel();
 947             } else {
 948                 UI.openXvpPanel();
 949             }
 950         },
 951
 952         // Disable/enable XVP button
 953         updateXvpButton: function(ver) {
 954             if (ver >= 1 && !UI.rfb.get_view_only()) {
 955                 document.getElementById('noVNC_xvp_button')
 956                     .classList.remove("noVNC_hidden");
 957             } else {
 958                 document.getElementById('noVNC_xvp_button')
 959                     .classList.add("noVNC_hidden");
 960                 // Close XVP panel if open
 961                 UI.closeXvpPanel();
 962             }
 963         },
 964
 965 /* ------^-------
 966  *     /XVP
 967  * ==============
 968  *   CLIPBOARD
 969  * ------v------*/
 970
 971         openClipboardPanel: function() {
 972             UI.closeAllPanels();
 973             UI.openControlbar();
 974
 975             document.getElementById('noVNC_clipboard')
 976                 .classList.add("noVNC_open");
 977             document.getElementById('noVNC_clipboard_button')
 978                 .classList.add("noVNC_selected");
 979         },
 980
 981         closeClipboardPanel: function() {
 982             document.getElementById('noVNC_clipboard')
 983                 .classList.remove("noVNC_open");
 984             document.getElementById('noVNC_clipboard_button')
 985                 .classList.remove("noVNC_selected");
 986         },
 987
 988         toggleClipboardPanel: function() {
 989             if (document.getElementById('noVNC_clipboard')
 990                 .classList.contains("noVNC_open")) {
 991                 UI.closeClipboardPanel();
 992             } else {
 993                 UI.openClipboardPanel();
 994             }
 995         },
 996
 997         clipboardReceive: function(rfb, text) {
 998             Util.Debug(">> UI.clipboardReceive: " + text.substr(0,40) + "...");
 999             document.getElementById('noVNC_clipboard_text').value = text;
1000             Util.Debug("<< UI.clipboardReceive");
1001         },
1002
1003         clipboardClear: function() {
1004             document.getElementById('noVNC_clipboard_text').value = "";
1005             UI.rfb.clipboardPasteFrom("");
1006         },
1007
1008         clipboardSend: function() {
1009             var text = document.getElementById('noVNC_clipboard_text').value;
1010             Util.Debug(">> UI.clipboardSend: " + text.substr(0,40) + "...");
1011             UI.rfb.clipboardPasteFrom(text);
1012             Util.Debug("<< UI.clipboardSend");
1013         },
1014
1015 /* ------^-------
1016  *  /CLIPBOARD
1017  * ==============
1018  *  CONNECTION
1019  * ------v------*/
1020
1021         openConnectPanel: function() {
1022             UI.closeAllPanels();
1023             UI.openControlbar();
1024
1025             document.getElementById('noVNC_connect_controls')
1026                 .classList.add("noVNC_open");
1027             document.getElementById('noVNC_connect_controls_button')
1028                 .classList.add("noVNC_selected");
1029
1030             document.getElementById('noVNC_setting_host').focus();
1031         },
1032
1033         closeConnectPanel: function() {
1034             document.getElementById('noVNC_connect_controls')
1035                 .classList.remove("noVNC_open");
1036             document.getElementById('noVNC_connect_controls_button')
1037                 .classList.remove("noVNC_selected");
1038
1039             UI.saveSetting('host');
1040             UI.saveSetting('port');
1041             UI.saveSetting('token');
1042             //UI.saveSetting('password');
1043         },
1044
1045         toggleConnectPanel: function() {
1046             if (document.getElementById('noVNC_connect_controls')
1047                 .classList.contains("noVNC_open")) {
1048                 UI.closeConnectPanel();
1049             } else {
1050                 UI.openConnectPanel();
1051             }
1052         },
1053
1054         connect: function() {
1055             var host = document.getElementById('noVNC_setting_host').value;
1056             var port = document.getElementById('noVNC_setting_port').value;
1057             var password = document.getElementById('noVNC_setting_password').value;
1058             var token = document.getElementById('noVNC_setting_token').value;
1059             var path = document.getElementById('noVNC_setting_path').value;
1060
1061             //if token is in path then ignore the new token variable
1062             if (token) {
1063                 path = WebUtil.injectParamIfMissing(path, "token", token);
1064             }
1065
1066             if ((!host) || (!port)) {
1067                 var msg = _("Must set host and port");
1068                 Util.Error(msg);
1069                 UI.showStatus(msg, 'error');
1070                 return;
1071             }
1072
1073             if (!UI.initRFB()) return;
1074
1075             UI.closeAllPanels();
1076
1077             UI.rfb.set_encrypt(UI.getSetting('encrypt'));
1078             UI.rfb.set_true_color(UI.getSetting('true_color'));
1079             UI.rfb.set_local_cursor(UI.getSetting('cursor'));
1080             UI.rfb.set_shared(UI.getSetting('shared'));
1081             UI.rfb.set_view_only(UI.getSetting('view_only'));
1082             UI.rfb.set_repeaterID(UI.getSetting('repeaterID'));
1083
1084             UI.rfb.connect(host, port, password, path);
1085         },
1086
1087         disconnect: function() {
1088             UI.closeAllPanels();
1089             UI.rfb.disconnect();
1090
1091             // Restore the callback used for initial resize
1092             UI.rfb.set_onFBUComplete(UI.initialResize);
1093
1094             // Don't display the connection settings until we're actually disconnected
1095         },
1096
1097         disconnectFinished: function (rfb, reason) {
1098             if (typeof reason !== 'undefined') {
1099                 UI.showStatus(reason, 'error');
1100             }
1101             UI.openConnectPanel();
1102         },
1103
1104 /* ------^-------
1105  *  /CONNECTION
1106  * ==============
1107  *   PASSWORD
1108  * ------v------*/
1109
1110         passwordRequired: function(rfb, msg) {
1111
1112             document.getElementById('noVNC_password_dlg')
1113                 .classList.add('noVNC_open');
1114
1115             setTimeout(function () {
1116                     document.getElementById('noVNC_password_input').focus();
1117                 }, 100);
1118
1119             if (typeof msg === 'undefined') {
1120                 msg = _("Password is required");
1121             }
1122             Util.Warn(msg);
1123             UI.showStatus(msg, "warning");
1124         },
1125
1126         setPassword: function() {
1127             UI.rfb.sendPassword(document.getElementById('noVNC_password_input').value);
1128             document.getElementById('noVNC_password_dlg')
1129                 .classList.remove('noVNC_open');
1130             return false;
1131         },
1132
1133 /* ------^-------
1134  *  /PASSWORD
1135  * ==============
1136  *   FULLSCREEN
1137  * ------v------*/
1138
1139         toggleFullscreen: function() {
1140             if (document.fullscreenElement || // alternative standard method
1141                 document.mozFullScreenElement || // currently working methods
1142                 document.webkitFullscreenElement ||
1143                 document.msFullscreenElement) {
1144                 if (document.exitFullscreen) {
1145                     document.exitFullscreen();
1146                 } else if (document.mozCancelFullScreen) {
1147                     document.mozCancelFullScreen();
1148                 } else if (document.webkitExitFullscreen) {
1149                     document.webkitExitFullscreen();
1150                 } else if (document.msExitFullscreen) {
1151                     document.msExitFullscreen();
1152                 }
1153             } else {
1154                 if (document.documentElement.requestFullscreen) {
1155                     document.documentElement.requestFullscreen();
1156                 } else if (document.documentElement.mozRequestFullScreen) {
1157                     document.documentElement.mozRequestFullScreen();
1158                 } else if (document.documentElement.webkitRequestFullscreen) {
1159                     document.documentElement.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
1160                 } else if (document.body.msRequestFullscreen) {
1161                     document.body.msRequestFullscreen();
1162                 }
1163             }
1164             UI.enableDisableViewClip();
1165             UI.updateFullscreenButton();
1166         },
1167
1168         updateFullscreenButton: function() {
1169             if (document.fullscreenElement || // alternative standard method
1170                 document.mozFullScreenElement || // currently working methods
1171                 document.webkitFullscreenElement ||
1172                 document.msFullscreenElement ) {
1173                 document.getElementById('noVNC_fullscreen_button')
1174                     .classList.add("noVNC_selected");
1175             } else {
1176                 document.getElementById('noVNC_fullscreen_button')
1177                     .classList.remove("noVNC_selected");
1178             }
1179         },
1180
1181 /* ------^-------
1182  *  /FULLSCREEN
1183  * ==============
1184  *     RESIZE
1185  * ------v------*/
1186
1187         // Apply remote resizing or local scaling
1188         applyResizeMode: function() {
1189             if (!UI.rfb) return;
1190
1191             var screen = UI.screenSize();
1192
1193             if (screen && UI.connected && UI.rfb.get_display()) {
1194
1195                 var display = UI.rfb.get_display();
1196                 var resizeMode = UI.getSetting('resize');
1197
1198                 if (resizeMode === 'remote') {
1199
1200                     // Request changing the resolution of the remote display to
1201                     // the size of the local browser viewport.
1202
1203                     // In order to not send multiple requests before the browser-resize
1204                     // is finished we wait 0.5 seconds before sending the request.
1205                     clearTimeout(UI.resizeTimeout);
1206                     UI.resizeTimeout = setTimeout(function(){
1207
1208                         // Limit the viewport to the size of the browser window
1209                         display.set_maxWidth(screen.w);
1210                         display.set_maxHeight(screen.h);
1211
1212                         // Request a remote size covering the viewport
1213                         if (UI.rfb.requestDesktopSize(screen.w, screen.h)) {
1214                             Util.Debug('Requested new desktop size: ' +
1215                                        screen.w + 'x' + screen.h);
1216                         }
1217                     }, 500);
1218
1219                 } else if (resizeMode === 'scale' || resizeMode === 'downscale') {
1220                     var downscaleOnly = resizeMode === 'downscale';
1221                     var scaleRatio = display.autoscale(screen.w, screen.h, downscaleOnly);
1222
1223                     if (!UI.rfb.get_view_only()) {
1224                         UI.rfb.get_mouse().set_scale(scaleRatio);
1225                         Util.Debug('Scaling by ' + UI.rfb.get_mouse().get_scale());
1226                     }
1227                 }
1228             }
1229         },
1230
1231         // Gets the the size of the available viewport in the browser window
1232         screenSize: function() {
1233             var screen = document.getElementById('noVNC_screen');
1234
1235             // Hide the scrollbars until the size is calculated
1236             screen.style.overflow = "hidden";
1237
1238             var pos = Util.getPosition(screen);
1239             var w = pos.width;
1240             var h = pos.height;
1241
1242             screen.style.overflow = "visible";
1243
1244             if (isNaN(w) || isNaN(h)) {
1245                 return false;
1246             } else {
1247                 return {w: w, h: h};
1248             }
1249         },
1250
1251         // Normally we only apply the current resize mode after a window resize
1252         // event. This means that when a new connection is opened, there is no
1253         // resize mode active.
1254         // We have to wait until the first FBU because this is where the client
1255         // will find the supported encodings of the server. Some calls later in
1256         // the chain is dependant on knowing the server-capabilities.
1257         initialResize: function(rfb, fbu) {
1258             UI.applyResizeMode();
1259             // After doing this once, we remove the callback.
1260             UI.rfb.set_onFBUComplete(function() { });
1261         },
1262
1263 /* ------^-------
1264  *    /RESIZE
1265  * ==============
1266  *    CLIPPING
1267  * ------v------*/
1268
1269         // Set and configure viewport clipping
1270         setViewClip: function(clip) {
1271             UI.updateSetting('clip', clip);
1272             UI.updateViewClip();
1273         },
1274
1275         // Update parameters that depend on the clip setting
1276         updateViewClip: function() {
1277             if (!UI.rfb) return;
1278
1279             var display = UI.rfb.get_display();
1280             var cur_clip = display.get_viewport();
1281             var new_clip = UI.getSetting('clip');
1282
1283             if (cur_clip !== new_clip) {
1284                 display.set_viewport(new_clip);
1285             }
1286
1287             var size = UI.screenSize();
1288
1289             if (new_clip && size) {
1290                 // When clipping is enabled, the screen is limited to
1291                 // the size of the browser window.
1292                 display.set_maxWidth(size.w);
1293                 display.set_maxHeight(size.h);
1294
1295                 var screen = document.getElementById('noVNC_screen');
1296                 var canvas = document.getElementById('noVNC_canvas');
1297
1298                 // Hide potential scrollbars that can skew the position
1299                 screen.style.overflow = "hidden";
1300
1301                 // The x position marks the left margin of the canvas,
1302                 // remove the margin from both sides to keep it centered.
1303                 var new_w = size.w - (2 * Util.getPosition(canvas).x);
1304
1305                 screen.style.overflow = "visible";
1306
1307                 display.viewportChangeSize(new_w, size.h);
1308             } else {
1309                 // Disable max dimensions
1310                 display.set_maxWidth(0);
1311                 display.set_maxHeight(0);
1312                 display.viewportChangeSize();
1313             }
1314         },
1315
1316         // Handle special cases where clipping is forced on/off or locked
1317         enableDisableViewClip: function() {
1318             var resizeSetting = document.getElementById('noVNC_setting_resize');
1319
1320             if (UI.isSafari) {
1321                 // Safari auto-hides the scrollbars which makes them
1322                 // impossible to use in most cases
1323                 UI.setViewClip(true);
1324                 document.getElementById('noVNC_setting_clip').disabled = true;
1325             } else if (resizeSetting.value === 'downscale' || resizeSetting.value === 'scale') {
1326                 // Disable clipping if we are scaling
1327                 UI.setViewClip(false);
1328                 document.getElementById('noVNC_setting_clip').disabled = true;
1329             } else if (document.msFullscreenElement) {
1330                 // The browser is IE and we are in fullscreen mode.
1331                 // - We need to force clipping while in fullscreen since
1332                 //   scrollbars doesn't work.
1333                 var msg = _("Forcing clipping mode since " +
1334                             "scrollbars aren't supported " +
1335                             "by IE in fullscreen");
1336                 Util.Debug(msg);
1337                 UI.showStatus(msg);
1338                 UI.rememberedClipSetting = UI.getSetting('clip');
1339                 UI.setViewClip(true);
1340                 document.getElementById('noVNC_setting_clip').disabled = true;
1341             } else if (document.body.msRequestFullscreen &&
1342                        UI.rememberedClipSetting !== null) {
1343                 // Restore view clip to what it was before fullscreen on IE
1344                 UI.setViewClip(UI.rememberedClipSetting);
1345                 document.getElementById('noVNC_setting_clip').disabled =
1346                     UI.connected || Util.isTouchDevice;
1347             } else {
1348                 document.getElementById('noVNC_setting_clip').disabled =
1349                     UI.connected || Util.isTouchDevice;
1350                 if (Util.isTouchDevice) {
1351                     UI.setViewClip(true);
1352                 }
1353             }
1354         },
1355
1356 /* ------^-------
1357  *   /CLIPPING
1358  * ==============
1359  *    VIEWDRAG
1360  * ------v------*/
1361
1362         toggleViewDrag: function() {
1363             if (!UI.rfb) return;
1364
1365             var drag = UI.rfb.get_viewportDrag();
1366             UI.setViewDrag(!drag);
1367          },
1368
1369         // Set the view drag mode which moves the viewport on mouse drags
1370         setViewDrag: function(drag) {
1371             if (!UI.rfb) return;
1372
1373             UI.rfb.set_viewportDrag(drag);
1374
1375             UI.updateViewDrag();
1376         },
1377
1378         updateViewDrag: function() {
1379             var clipping = false;
1380
1381             if (!UI.connected) return;
1382
1383             // Check if viewport drag is possible. It is only possible
1384             // if the remote display is clipping the client display.
1385             if (UI.rfb.get_display().get_viewport() &&
1386                 UI.rfb.get_display().clippingDisplay()) {
1387                 clipping = true;
1388             }
1389
1390             var viewDragButton = document.getElementById('noVNC_view_drag_button');
1391
1392             if (!clipping &&
1393                 UI.rfb.get_viewportDrag()) {
1394                 // The size of the remote display is the same or smaller
1395                 // than the client display. Make sure viewport drag isn't
1396                 // active when it can't be used.
1397                 UI.rfb.set_viewportDrag(false);
1398             }
1399
1400             if (UI.rfb.get_viewportDrag()) {
1401                 viewDragButton.classList.add("noVNC_selected");
1402             } else {
1403                 viewDragButton.classList.remove("noVNC_selected");
1404             }
1405
1406             // Different behaviour for touch vs non-touch
1407             // The button is disabled instead of hidden on touch devices
1408             if (Util.isTouchDevice) {
1409                 viewDragButton.classList.remove("noVNC_hidden");
1410
1411                 if (clipping) {
1412                     viewDragButton.disabled = false;
1413                 } else {
1414                     viewDragButton.disabled = true;
1415                 }
1416             } else {
1417                 viewDragButton.disabled = false;
1418
1419                 if (clipping) {
1420                     viewDragButton.classList.remove("noVNC_hidden");
1421                 } else {
1422                     viewDragButton.classList.add("noVNC_hidden");
1423                 }
1424             }
1425         },
1426
1427 /* ------^-------
1428  *   /VIEWDRAG
1429  * ==============
1430  *    KEYBOARD
1431  * ------v------*/
1432
1433         showVirtualKeyboard: function() {
1434             if (!Util.isTouchDevice) return;
1435
1436             var input = document.getElementById('noVNC_keyboardinput');
1437
1438             if (document.activeElement == input) return;
1439
1440             input.focus();
1441
1442             try {
1443                 var l = input.value.length;
1444                 // Move the caret to the end
1445                 input.setSelectionRange(l, l);
1446             } catch (err) {} // setSelectionRange is undefined in Google Chrome
1447         },
1448
1449         hideVirtualKeyboard: function() {
1450             if (!Util.isTouchDevice) return;
1451
1452             var input = document.getElementById('noVNC_keyboardinput');
1453
1454             if (document.activeElement != input) return;
1455
1456             input.blur();
1457         },
1458
1459         toggleVirtualKeyboard: function () {
1460             if (document.getElementById('noVNC_keyboard_button')
1461                 .classList.contains("noVNC_selected")) {
1462                 UI.hideVirtualKeyboard();
1463             } else {
1464                 UI.showVirtualKeyboard();
1465             }
1466         },
1467
1468         onfocusVirtualKeyboard: function(event) {
1469             document.getElementById('noVNC_keyboard_button')
1470                 .classList.add("noVNC_selected");
1471         },
1472
1473         onblurVirtualKeyboard: function(event) {
1474             document.getElementById('noVNC_keyboard_button')
1475                 .classList.remove("noVNC_selected");
1476         },
1477
1478         keepVirtualKeyboard: function(event) {
1479             var input = document.getElementById('noVNC_keyboardinput');
1480
1481             // Only prevent focus change if the virtual keyboard is active
1482             if (document.activeElement != input) {
1483                 return;
1484             }
1485
1486             // Allow clicking on links
1487             if (event.target.tagName === "A") {
1488                 return;
1489             }
1490
1491             // And form elements, except standard noVNC buttons
1492             if ((event.target.form !== undefined) &&
1493                 !event.target.classList.contains("noVNC_button")) {
1494                 return;
1495             }
1496
1497             event.preventDefault();
1498         },
1499
1500         keyboardinputReset: function() {
1501             var kbi = document.getElementById('noVNC_keyboardinput');
1502             kbi.value = new Array(UI.defaultKeyboardinputLen).join("_");
1503             UI.lastKeyboardinput = kbi.value;
1504         },
1505
1506         // When normal keyboard events are left uncought, use the input events from
1507         // the keyboardinput element instead and generate the corresponding key events.
1508         // This code is required since some browsers on Android are inconsistent in
1509         // sending keyCodes in the normal keyboard events when using on screen keyboards.
1510         keyInput: function(event) {
1511
1512             if (!UI.rfb) return;
1513
1514             var newValue = event.target.value;
1515
1516             if (!UI.lastKeyboardinput) {
1517                 UI.keyboardinputReset();
1518             }
1519             var oldValue = UI.lastKeyboardinput;
1520
1521             var newLen;
1522             try {
1523                 // Try to check caret position since whitespace at the end
1524                 // will not be considered by value.length in some browsers
1525                 newLen = Math.max(event.target.selectionStart, newValue.length);
1526             } catch (err) {
1527                 // selectionStart is undefined in Google Chrome
1528                 newLen = newValue.length;
1529             }
1530             var oldLen = oldValue.length;
1531
1532             var backspaces;
1533             var inputs = newLen - oldLen;
1534             if (inputs < 0) {
1535                 backspaces = -inputs;
1536             } else {
1537                 backspaces = 0;
1538             }
1539
1540             // Compare the old string with the new to account for
1541             // text-corrections or other input that modify existing text
1542             var i;
1543             for (i = 0; i < Math.min(oldLen, newLen); i++) {
1544                 if (newValue.charAt(i) != oldValue.charAt(i)) {
1545                     inputs = newLen - i;
1546                     backspaces = oldLen - i;
1547                     break;
1548                 }
1549             }
1550
1551             // Send the key events
1552             for (i = 0; i < backspaces; i++) {
1553                 UI.rfb.sendKey(KeyTable.XK_BackSpace);
1554             }
1555             for (i = newLen - inputs; i < newLen; i++) {
1556                 UI.rfb.sendKey(keysyms.fromUnicode(newValue.charCodeAt(i)).keysym);
1557             }
1558
1559             // Control the text content length in the keyboardinput element
1560             if (newLen > 2 * UI.defaultKeyboardinputLen) {
1561                 UI.keyboardinputReset();
1562             } else if (newLen < 1) {
1563                 // There always have to be some text in the keyboardinput
1564                 // element with which backspace can interact.
1565                 UI.keyboardinputReset();
1566                 // This sometimes causes the keyboard to disappear for a second
1567                 // but it is required for the android keyboard to recognize that
1568                 // text has been added to the field
1569                 event.target.blur();
1570                 // This has to be ran outside of the input handler in order to work
1571                 setTimeout(event.target.focus.bind(event.target), 0);
1572             } else {
1573                 UI.lastKeyboardinput = newValue;
1574             }
1575         },
1576
1577 /* ------^-------
1578  *   /KEYBOARD
1579  * ==============
1580  *   EXTRA KEYS
1581  * ------v------*/
1582
1583         openExtraKeys: function() {
1584             UI.closeAllPanels();
1585             UI.openControlbar();
1586
1587             document.getElementById('noVNC_modifiers')
1588                 .classList.add("noVNC_open");
1589             document.getElementById('noVNC_toggle_extra_keys_button')
1590                 .classList.add("noVNC_selected");
1591         },
1592
1593         closeExtraKeys: function() {
1594             document.getElementById('noVNC_modifiers')
1595                 .classList.remove("noVNC_open");
1596             document.getElementById('noVNC_toggle_extra_keys_button')
1597                 .classList.remove("noVNC_selected");
1598         },
1599
1600         toggleExtraKeys: function() {
1601             if(document.getElementById('noVNC_modifiers')
1602                 .classList.contains("noVNC_open")) {
1603                 UI.closeExtraKeys();
1604             } else  {
1605                 UI.openExtraKeys();
1606             }
1607         },
1608
1609         sendEsc: function() {
1610             UI.rfb.sendKey(KeyTable.XK_Escape);
1611         },
1612
1613         sendTab: function() {
1614             UI.rfb.sendKey(KeyTable.XK_Tab);
1615         },
1616
1617         toggleCtrl: function() {
1618             var btn = document.getElementById('noVNC_toggle_ctrl_button');
1619             if (btn.classList.contains("noVNC_selected")) {
1620                 UI.rfb.sendKey(KeyTable.XK_Control_L, false);
1621                 btn.classList.remove("noVNC_selected");
1622             } else {
1623                 UI.rfb.sendKey(KeyTable.XK_Control_L, true);
1624                 btn.classList.add("noVNC_selected");
1625             }
1626         },
1627
1628         toggleAlt: function() {
1629             var btn = document.getElementById('noVNC_toggle_alt_button');
1630             if (btn.classList.contains("noVNC_selected")) {
1631                 UI.rfb.sendKey(KeyTable.XK_Alt_L, false);
1632                 btn.classList.remove("noVNC_selected");
1633             } else {
1634                 UI.rfb.sendKey(KeyTable.XK_Alt_L, true);
1635                 btn.classList.add("noVNC_selected");
1636             }
1637         },
1638
1639         sendCtrlAltDel: function() {
1640             UI.rfb.sendCtrlAltDel();
1641         },
1642
1643 /* ------^-------
1644  *   /EXTRA KEYS
1645  * ==============
1646  *     MISC
1647  * ------v------*/
1648
1649         setMouseButton: function(num) {
1650             var view_only = UI.rfb.get_view_only();
1651             if (UI.rfb && !view_only) {
1652                 UI.rfb.get_mouse().set_touchButton(num);
1653             }
1654
1655             var blist = [0, 1,2,4];
1656             for (var b = 0; b < blist.length; b++) {
1657                 var button = document.getElementById('noVNC_mouse_button' +
1658                                                      blist[b]);
1659                 if (blist[b] === num && !view_only) {
1660                     button.classList.remove("noVNC_hidden");
1661                 } else {
1662                     button.classList.add("noVNC_hidden");
1663                 }
1664             }
1665         },
1666
1667         displayBlur: function() {
1668             if (UI.rfb && !UI.rfb.get_view_only()) {
1669                 UI.rfb.get_keyboard().set_focused(false);
1670                 UI.rfb.get_mouse().set_focused(false);
1671             }
1672         },
1673
1674         displayFocus: function() {
1675             if (UI.rfb && !UI.rfb.get_view_only()) {
1676                 UI.rfb.get_keyboard().set_focused(true);
1677                 UI.rfb.get_mouse().set_focused(true);
1678             }
1679         },
1680
1681         updateDesktopName: function(rfb, name) {
1682             UI.desktopName = name;
1683             // Display the desktop name in the document title
1684             document.title = name + " - noVNC";
1685         },
1686
1687         bell: function(rfb) {
1688             if (WebUtil.getConfigVar('bell', 'on') === 'on') {
1689                 document.getElementById('noVNC_bell').play();
1690             }
1691         },
1692
1693         //Helper to add options to dropdown.
1694         addOption: function(selectbox, text, value) {
1695             var optn = document.createElement("OPTION");
1696             optn.text = text;
1697             optn.value = value;
1698             selectbox.options.add(optn);
1699         },
1700
1701 /* ------^-------
1702  *    /MISC
1703  * ==============
1704  */
1705     };
1706
1707     /* [module] UI.load(); */
1708 })();
1709
1710 /* [module] export default UI; */