src/main/webapp/scripts/interface.js

   1
   2 // UI Definition
   3 var GuacamoleUI = {
   4
   5     /* Detection Constants */
   6
   7     "LONG_PRESS_DETECT_TIMEOUT"     : 800, /* milliseconds */
   8     "LONG_PRESS_MOVEMENT_THRESHOLD" : 10,  /* pixels */
   9     "MENU_CLOSE_DETECT_TIMEOUT"     : 500, /* milliseconds */
  10     "MENU_OPEN_DETECT_TIMEOUT"      : 325, /* milliseconds */
  11     "KEYBOARD_AUTO_RESIZE_INTERVAL" : 30,  /* milliseconds */
  12
  13     /* Animation Constants */
  14
  15     "MENU_SHADE_STEPS"    : 10, /* frames */
  16     "MENU_SHADE_INTERVAL" : 30, /* milliseconds */
  17     "MENU_SHOW_STEPS"     : 5,  /* frames */
  18     "MENU_SHOW_INTERVAL"  : 30, /* milliseconds */
  19
  20     /* OSK Mode Constants */
  21     "OSK_MODE_NATIVE" : 1, /* "Show Keyboard" will show the platform's native OSK */
  22     "OSK_MODE_GUAC"   : 2, /* "Show Keyboard" will show Guac's built-in OSK */
  23
  24     /* UI Elements */
  25
  26     "viewport"    : document.getElementById("viewportClone"),
  27     "display"     : document.getElementById("display"),
  28     "menu"        : document.getElementById("menu"),
  29     "menuControl" : document.getElementById("menuControl"),
  30     "touchMenu"   : document.getElementById("touchMenu"),
  31     "logo"        : document.getElementById("status-logo"),
  32     "eventTarget" : document.getElementById("eventTarget"),
  33
  34     "buttons": {
  35
  36         "showClipboard": document.getElementById("showClipboard"),
  37         "showKeyboard" : document.getElementById("showKeyboard"),
  38         "ctrlAltDelete": document.getElementById("ctrlAltDelete"),
  39         "reconnect"    : document.getElementById("reconnect"),
  40         "logout"       : document.getElementById("logout"),
  41
  42         "touchShowClipboard" : document.getElementById("touchShowClipboard"),
  43         "touchShowKeyboard"  : document.getElementById("touchShowKeyboard"),
  44         "touchLogout"        : document.getElementById("touchLogout")
  45
  46     },
  47
  48     "containers": {
  49         "state"    : document.getElementById("statusDialog"),
  50         "clipboard": document.getElementById("clipboardDiv"),
  51         "keyboard" : document.getElementById("keyboardContainer")
  52     },
  53
  54     "state"     : document.getElementById("statusText"),
  55     "clipboard" : document.getElementById("clipboard")
  56
  57 };
  58
  59 // Constant UI initialization and behavior
  60 (function() {
  61
  62     var menu_shaded = false;
  63
  64     var shade_interval = null;
  65     var show_interval = null;
  66
  67     // Cache error image (might not be available when error occurs)
  68     var guacErrorImage = new Image();
  69     guacErrorImage.src = "images/noguacamole-logo-24.png";
  70
  71     // Function for adding a class to an element
  72     var addClass;
  73
  74     // Function for removing a class from an element
  75     var removeClass;
  76
  77     // If Node.classList is supported, implement addClass/removeClass using that
  78     if (Node.classList) {
  79
  80         addClass = function(element, classname) {
  81             element.classList.add(classname);
  82         };
  83
  84         removeClass = function(element, classname) {
  85             element.classList.remove(classname);
  86         };
  87
  88     }
  89
  90     // Otherwise, implement own
  91     else {
  92
  93         addClass = function(element, classname) {
  94
  95             // Simply add new class
  96             element.className += " " + classname;
  97
  98         };
  99
 100         removeClass = function(element, classname) {
 101
 102             // Filter out classes with given name
 103             element.className = element.className.replace(/([^ ]+)[ ]*/g,
 104                 function(match, testClassname, spaces, offset, string) {
 105
 106                     // If same class, remove
 107                     if (testClassname == classname)
 108                         return "";
 109
 110                     // Otherwise, allow
 111                     return match;
 112
 113                 }
 114             );
 115
 116         };
 117
 118     }
 119
 120
 121     GuacamoleUI.hideStatus = function() {
 122         removeClass(document.body, "guac-error");
 123         GuacamoleUI.containers.state.style.visibility = "hidden";
 124         GuacamoleUI.display.style.opacity = "1";
 125     };
 126
 127     GuacamoleUI.showStatus = function(text) {
 128         removeClass(document.body, "guac-error");
 129         GuacamoleUI.containers.state.style.visibility = "visible";
 130         GuacamoleUI.state.textContent = text;
 131         GuacamoleUI.display.style.opacity = "1";
 132     };
 133
 134     GuacamoleUI.showError = function(error) {
 135         addClass(document.body, "guac-error");
 136         GuacamoleUI.state.textContent = error;
 137         GuacamoleUI.display.style.opacity = "0.1";
 138     };
 139
 140     GuacamoleUI.hideTouchMenu = function() {
 141         GuacamoleUI.touchMenu.style.visibility = "hidden";
 142     };
 143
 144     GuacamoleUI.showTouchMenu = function() {
 145
 146         GuacamoleUI.touchMenu.style.left =
 147             ((GuacamoleUI.viewport.offsetWidth - GuacamoleUI.touchMenu.offsetWidth) / 2
 148             + window.pageXOffset)
 149             + "px";
 150
 151         GuacamoleUI.touchMenu.style.top =
 152             ((GuacamoleUI.viewport.offsetHeight - GuacamoleUI.touchMenu.offsetHeight) / 2
 153             + window.pageYOffset)
 154             + "px";
 155
 156         GuacamoleUI.touchMenu.style.visibility = "visible";
 157
 158     };
 159
 160     GuacamoleUI.shadeMenu = function() {
 161
 162         if (!menu_shaded) {
 163
 164             var step = Math.floor(GuacamoleUI.menu.offsetHeight / GuacamoleUI.MENU_SHADE_STEPS) + 1;
 165             var offset = 0;
 166             menu_shaded = true;
 167
 168             window.clearInterval(show_interval);
 169             shade_interval = window.setInterval(function() {
 170
 171                 offset -= step;
 172
 173                 GuacamoleUI.menu.style.transform =
 174                 GuacamoleUI.menu.style.WebkitTransform =
 175                 GuacamoleUI.menu.style.MozTransform =
 176                 GuacamoleUI.menu.style.OTransform =
 177                 GuacamoleUI.menu.style.msTransform =
 178
 179                     "translateY(" + offset + "px)";
 180
 181                 if (offset <= -GuacamoleUI.menu.offsetHeight) {
 182                     window.clearInterval(shade_interval);
 183                     GuacamoleUI.menu.style.visiblity = "hidden";
 184                 }
 185
 186             }, GuacamoleUI.MENU_SHADE_INTERVAL);
 187         }
 188
 189     };
 190
 191     GuacamoleUI.showMenu = function() {
 192
 193         if (menu_shaded) {
 194
 195             var step = Math.floor(GuacamoleUI.menu.offsetHeight / GuacamoleUI.MENU_SHOW_STEPS) + 1;
 196             var offset = -GuacamoleUI.menu.offsetHeight;
 197             menu_shaded = false;
 198             GuacamoleUI.menu.style.visiblity = "";
 199
 200             window.clearInterval(shade_interval);
 201             show_interval = window.setInterval(function() {
 202
 203                 offset += step;
 204
 205                 if (offset >= 0) {
 206                     offset = 0;
 207                     window.clearInterval(show_interval);
 208                 }
 209
 210                 GuacamoleUI.menu.style.transform =
 211                 GuacamoleUI.menu.style.WebkitTransform =
 212                 GuacamoleUI.menu.style.MozTransform =
 213                 GuacamoleUI.menu.style.OTransform =
 214                 GuacamoleUI.menu.style.msTransform =
 215
 216                     "translateY(" + offset + "px)";
 217
 218             }, GuacamoleUI.MENU_SHOW_INTERVAL);
 219         }
 220
 221     };
 222
 223     // Show/Hide clipboard
 224     GuacamoleUI.buttons.showClipboard.onclick = function() {
 225
 226         var displayed = GuacamoleUI.containers.clipboard.style.display;
 227         if (displayed != "block") {
 228             GuacamoleUI.containers.clipboard.style.display = "block";
 229             GuacamoleUI.buttons.showClipboard.innerHTML = "Hide Clipboard";
 230         }
 231         else {
 232             GuacamoleUI.containers.clipboard.style.display = "none";
 233             GuacamoleUI.buttons.showClipboard.innerHTML = "Show Clipboard";
 234             GuacamoleUI.clipboard.onchange();
 235         }
 236
 237     };
 238
 239     GuacamoleUI.buttons.touchShowClipboard.onclick = function() {
 240         // FIXME: Implement
 241         alert("Not yet implemented... Sorry.");
 242     };
 243
 244     // Show/Hide keyboard
 245     var keyboardResizeInterval = null;
 246     GuacamoleUI.buttons.showKeyboard.onclick = function() {
 247
 248         // If Guac OSK shown, hide it.
 249         var displayed = GuacamoleUI.containers.keyboard.style.display;
 250         if (displayed == "block") {
 251             GuacamoleUI.containers.keyboard.style.display = "none";
 252             GuacamoleUI.buttons.showKeyboard.textContent = "Show Keyboard";
 253
 254             window.onresize = null;
 255             window.clearInterval(keyboardResizeInterval);
 256         }
 257
 258         // Otherwise, show it
 259         else {
 260
 261             // Ensure event target is NOT focused if we are using the Guac OSK.
 262             GuacamoleUI.eventTarget.blur();
 263
 264             GuacamoleUI.containers.keyboard.style.display = "block";
 265             GuacamoleUI.buttons.showKeyboard.textContent = "Hide Keyboard";
 266
 267             // Automatically update size
 268             window.onresize = updateKeyboardSize;
 269             keyboardResizeInterval = window.setInterval(updateKeyboardSize,
 270                 GuacamoleUI.KEYBOARD_AUTO_RESIZE_INTERVAL);
 271
 272             updateKeyboardSize();
 273
 274         }
 275
 276     };
 277
 278     // Touch-specific keyboard show
 279     GuacamoleUI.buttons.touchShowKeyboard.ontouchstart =
 280     GuacamoleUI.buttons.touchShowKeyboard.onclick =
 281         function(e) {
 282             GuacamoleUI.eventTarget.focus();
 283             GuacamoleUI.hideTouchMenu();
 284             e.preventDefault();
 285         };
 286
 287     // Logout
 288     GuacamoleUI.buttons.logout.onclick =
 289     GuacamoleUI.buttons.touchLogout.onclick =
 290         function() {
 291             window.location.href = "logout";
 292         };
 293
 294     // Timeouts for detecting if users wants menu to open or close
 295     var detectMenuOpenTimeout = null;
 296     var detectMenuCloseTimeout = null;
 297
 298     // Clear detection timeouts
 299     GuacamoleUI.resetMenuDetect = function() {
 300
 301         if (detectMenuOpenTimeout != null) {
 302             window.clearTimeout(detectMenuOpenTimeout);
 303             detectMenuOpenTimeout = null;
 304         }
 305
 306         if (detectMenuCloseTimeout != null) {
 307             window.clearTimeout(detectMenuCloseTimeout);
 308             detectMenuCloseTimeout = null;
 309         }
 310
 311     };
 312
 313     // Initiate detection of menu open action. If not canceled through some
 314     // user event, menu will open.
 315     GuacamoleUI.startMenuOpenDetect = function() {
 316
 317         if (!detectMenuOpenTimeout) {
 318
 319             // Clear detection state
 320             GuacamoleUI.resetMenuDetect();
 321
 322             // Wait and then show menu
 323             detectMenuOpenTimeout = window.setTimeout(function() {
 324
 325                 // If menu opened via mouse, do not show native OSK
 326                 GuacamoleUI.oskMode = GuacamoleUI.OSK_MODE_GUAC;
 327
 328                 GuacamoleUI.showMenu();
 329                 detectMenuOpenTimeout = null;
 330             }, GuacamoleUI.MENU_OPEN_DETECT_TIMEOUT);
 331
 332         }
 333
 334     };
 335
 336     // Initiate detection of menu close action. If not canceled through some
 337     // user mouse event, menu will close.
 338     GuacamoleUI.startMenuCloseDetect = function() {
 339
 340         if (!detectMenuCloseTimeout) {
 341
 342             // Clear detection state
 343             GuacamoleUI.resetMenuDetect();
 344
 345             // Wait and then shade menu
 346             detectMenuCloseTimeout = window.setTimeout(function() {
 347                 GuacamoleUI.shadeMenu();
 348                 detectMenuCloseTimeout = null;
 349             }, GuacamoleUI.MENU_CLOSE_DETECT_TIMEOUT);
 350
 351         }
 352
 353     };
 354
 355     // Show menu if mouseover any part of menu
 356     GuacamoleUI.menu.addEventListener('mouseover', GuacamoleUI.showMenu, true);
 357
 358     // Stop detecting menu state change intents if mouse is over menu
 359     GuacamoleUI.menu.addEventListener('mouseover', GuacamoleUI.resetMenuDetect, true);
 360
 361     // When mouse hovers over top of screen, start detection of intent to open menu
 362     GuacamoleUI.menuControl.addEventListener('mousemove', GuacamoleUI.startMenuOpenDetect, true);
 363
 364     var long_press_start_x = 0;
 365     var long_press_start_y = 0;
 366     var menuShowLongPressTimeout = null;
 367
 368     GuacamoleUI.startLongPressDetect = function() {
 369
 370         if (!menuShowLongPressTimeout) {
 371
 372             menuShowLongPressTimeout = window.setTimeout(function() {
 373
 374                 menuShowLongPressTimeout = null;
 375
 376                 // Assume native OSK if menu shown via long-press
 377                 GuacamoleUI.oskMode = GuacamoleUI.OSK_MODE_NATIVE;
 378                 GuacamoleUI.showTouchMenu();
 379
 380             }, GuacamoleUI.LONG_PRESS_DETECT_TIMEOUT);
 381
 382         }
 383     };
 384
 385     GuacamoleUI.stopLongPressDetect = function() {
 386         window.clearTimeout(menuShowLongPressTimeout);
 387         menuShowLongPressTimeout = null;
 388     };
 389
 390     // Detect long-press at bottom of screen
 391     GuacamoleUI.display.addEventListener('touchstart', function(e) {
 392
 393         // Close menu if shown
 394         GuacamoleUI.shadeMenu();
 395         GuacamoleUI.hideTouchMenu();
 396
 397         // Record touch location
 398         if (e.touches.length == 1) {
 399             var touch = e.touches[0];
 400             long_press_start_x = touch.screenX;
 401             long_press_start_y = touch.screenY;
 402         }
 403
 404         // Start detection
 405         GuacamoleUI.startLongPressDetect();
 406
 407     }, true);
 408
 409     // Stop detection if touch moves significantly
 410     GuacamoleUI.display.addEventListener('touchmove', function(e) {
 411
 412         // If touch distance from start exceeds threshold, cancel long press
 413         var touch = e.touches[0];
 414         if (Math.abs(touch.screenX - long_press_start_x) >= GuacamoleUI.LONG_PRESS_MOVEMENT_THRESHOLD
 415             || Math.abs(touch.screenY - long_press_start_y) >= GuacamoleUI.LONG_PRESS_MOVEMENT_THRESHOLD)
 416             GuacamoleUI.stopLongPressDetect();
 417
 418     }, true);
 419
 420     // Stop detection if press stops
 421     GuacamoleUI.display.addEventListener('touchend', GuacamoleUI.stopLongPressDetect, true);
 422
 423     // Close menu on mouse movement
 424     GuacamoleUI.display.addEventListener('mousemove', GuacamoleUI.startMenuCloseDetect, true);
 425     GuacamoleUI.display.addEventListener('mousedown', GuacamoleUI.startMenuCloseDetect, true);
 426
 427     // Reconnect button
 428     GuacamoleUI.buttons.reconnect.onclick = function() {
 429         window.location.reload();
 430     };
 431
 432     // On-screen keyboard
 433     GuacamoleUI.keyboard = new Guacamole.OnScreenKeyboard("layouts/en-us-qwerty-mobile.xml");
 434     GuacamoleUI.containers.keyboard.appendChild(GuacamoleUI.keyboard.getElement());
 435
 436     // Function for automatically updating keyboard size
 437     var lastKeyboardWidth;
 438     function updateKeyboardSize() {
 439         var currentSize = GuacamoleUI.keyboard.getElement().offsetWidth;
 440         if (lastKeyboardWidth != currentSize) {
 441             GuacamoleUI.keyboard.resize(currentSize);
 442             lastKeyboardWidth = currentSize;
 443         }
 444     };
 445
 446     // Turn off autocorrect and autocapitalization on eventTarget
 447     GuacamoleUI.eventTarget.setAttribute("autocorrect", "off");
 448     GuacamoleUI.eventTarget.setAttribute("autocapitalize", "off");
 449
 450 })();
 451
 452 // Tie UI events / behavior to a specific Guacamole client
 453 GuacamoleUI.attach = function(guac) {
 454
 455     var title_prefix = null;
 456     var connection_name = "Guacamole";
 457
 458     var guac_display = guac.getDisplay();
 459
 460     // Set document title appropriately, based on prefix and connection name
 461     function updateTitle() {
 462
 463         // Use title prefix if present
 464         if (title_prefix) {
 465
 466             document.title = title_prefix;
 467
 468             // Include connection name, if present
 469             if (connection_name)
 470                 document.title += " " + connection_name;
 471
 472         }
 473
 474         // Otherwise, just set to connection name
 475         else if (connection_name)
 476             document.title = connection_name;
 477
 478     }
 479
 480     // When mouse enters display, start detection of intent to close menu
 481     guac_display.addEventListener('mouseover', GuacamoleUI.startMenuCloseDetect, true);
 482
 483     guac_display.onclick = function(e) {
 484         e.preventDefault();
 485         return false;
 486     };
 487
 488     // Mouse
 489     var mouse = new Guacamole.Mouse(guac_display);
 490     mouse.onmousedown = mouse.onmouseup = mouse.onmousemove =
 491         function(mouseState) {
 492
 493             // Determine mouse position within view
 494             var mouse_view_x = mouseState.x + guac_display.offsetLeft - window.pageXOffset;
 495             var mouse_view_y = mouseState.y + guac_display.offsetTop  - window.pageYOffset;
 496
 497             // Determine viewport dimensioins
 498             var view_width  = GuacamoleUI.viewport.offsetWidth;
 499             var view_height = GuacamoleUI.viewport.offsetHeight;
 500
 501             // Determine scroll amounts based on mouse position relative to document
 502
 503             var scroll_amount_x;
 504             if (mouse_view_x > view_width)
 505                 scroll_amount_x = mouse_view_x - view_width;
 506             else if (mouse_view_x < 0)
 507                 scroll_amount_x = mouse_view_x;
 508             else
 509                 scroll_amount_x = 0;
 510
 511             var scroll_amount_y;
 512             if (mouse_view_y > view_height)
 513                 scroll_amount_y = mouse_view_y - view_height;
 514             else if (mouse_view_y < 0)
 515                 scroll_amount_y = mouse_view_y;
 516             else
 517                 scroll_amount_y = 0;
 518
 519             // Scroll (if necessary) to keep mouse on screen.
 520             window.scrollBy(scroll_amount_x, scroll_amount_y);
 521
 522             // Send mouse event
 523             guac.sendMouseState(mouseState);
 524
 525         };
 526
 527     // Keyboard
 528     var keyboard = new Guacamole.Keyboard(document);
 529
 530     // Monitor whether the event target is focused
 531     var eventTargetFocused = false;
 532
 533     // Save length for calculation of changed value
 534     var currentLength = GuacamoleUI.eventTarget.value.length;
 535
 536     GuacamoleUI.eventTarget.onfocus = function() {
 537         eventTargetFocused = true;
 538         GuacamoleUI.eventTarget.value = "";
 539         currentLength = 0;
 540     };
 541
 542     GuacamoleUI.eventTarget.onblur = function() {
 543         eventTargetFocused = false;
 544     };
 545
 546     // If text is input directly into event target without typing (as with
 547     // voice input, for example), type automatically.
 548     GuacamoleUI.eventTarget.oninput = function(e) {
 549
 550         // Calculate current length and change in length
 551         var oldLength = currentLength;
 552         currentLength = GuacamoleUI.eventTarget.value.length;
 553
 554         // If deleted or replaced text, ignore
 555         if (currentLength <= oldLength)
 556             return;
 557
 558         // Get changed text
 559         var text = GuacamoleUI.eventTarget.value.substring(oldLength);
 560
 561         // Send each character
 562         for (var i=0; i<text.length; i++) {
 563
 564             // Get char code
 565             var charCode = text.charCodeAt(i);
 566
 567             // Convert to keysym
 568             var keysym = 0x003F; // Default to a question mark
 569             if (charCode >= 0x0000 && charCode <= 0x00FF)
 570                 keysym = charCode;
 571             else if (charCode >= 0x0100 && charCode <= 0x10FFFF)
 572                 keysym = 0x01000000 | charCode;
 573
 574             // Send keysym only if not already pressed
 575             if (!keyboard.pressed[keysym]) {
 576
 577                 // Press and release key
 578                 guac.sendKeyEvent(1, keysym);
 579                 guac.sendKeyEvent(0, keysym);
 580
 581             }
 582
 583         }
 584
 585     }
 586
 587     function isTypableCharacter(keysym) {
 588         return (keysym & 0xFFFF00) != 0xFF00;
 589     }
 590
 591     function disableKeyboard() {
 592         keyboard.onkeydown = null;
 593         keyboard.onkeyup = null;
 594     }
 595
 596     function enableKeyboard() {
 597
 598         keyboard.onkeydown = function (keysym) {
 599             guac.sendKeyEvent(1, keysym);
 600             return eventTargetFocused && isTypableCharacter(keysym);
 601         };
 602
 603         keyboard.onkeyup = function (keysym) {
 604             guac.sendKeyEvent(0, keysym);
 605             return eventTargetFocused && isTypableCharacter(keysym);
 606         };
 607
 608     }
 609
 610     // Enable keyboard by default
 611     enableKeyboard();
 612
 613     // Handle client state change
 614     guac.onstatechange = function(clientState) {
 615
 616         switch (clientState) {
 617
 618             // Idle
 619             case 0:
 620                 GuacamoleUI.showStatus("Idle.");
 621                 title_prefix = "[Idle]";
 622                 break;
 623
 624             // Connecting
 625             case 1:
 626                 GuacamoleUI.shadeMenu();
 627                 GuacamoleUI.showStatus("Connecting...");
 628                 title_prefix = "[Connecting...]";
 629                 break;
 630
 631             // Connected + waiting
 632             case 2:
 633                 GuacamoleUI.showStatus("Connected, waiting for first update...");
 634                 title_prefix = "[Waiting...]";
 635                 break;
 636
 637             // Connected
 638             case 3:
 639                 GuacamoleUI.hideStatus();
 640                 title_prefix = null;
 641                 break;
 642
 643             // Disconnecting
 644             case 4:
 645                 GuacamoleUI.showStatus("Disconnecting...");
 646                 title_prefix = "[Disconnecting...]";
 647                 break;
 648
 649             // Disconnected
 650             case 5:
 651                 GuacamoleUI.showStatus("Disconnected.");
 652                 title_prefix = "[Disconnected]";
 653                 break;
 654
 655             // Unknown status code
 656             default:
 657                 GuacamoleUI.showStatus("[UNKNOWN STATUS]");
 658
 659         }
 660
 661         updateTitle();
 662     };
 663
 664     // Name instruction handler
 665     guac.onname = function(name) {
 666         connection_name = name;
 667         updateTitle();
 668     };
 669
 670     // Error handler
 671     guac.onerror = function(error) {
 672
 673         // Disconnect, if connected
 674         guac.disconnect();
 675
 676         // Display error message
 677         GuacamoleUI.showError(error);
 678
 679     };
 680
 681     // Disconnect on close
 682     window.onunload = function() {
 683         guac.disconnect();
 684     };
 685
 686     // Handle clipboard events
 687     GuacamoleUI.clipboard.onchange = function() {
 688
 689         var text = GuacamoleUI.clipboard.value;
 690         guac.setClipboard(text);
 691
 692     };
 693
 694     // Ignore keypresses when clipboard is focused
 695     GuacamoleUI.clipboard.onfocus = function() {
 696         disableKeyboard();
 697     };
 698
 699     // Capture keypresses when clipboard is not focused
 700     GuacamoleUI.clipboard.onblur = function() {
 701         enableKeyboard();
 702     };
 703
 704     // Server copy handler
 705     guac.onclipboard = function(data) {
 706         GuacamoleUI.clipboard.value = data;
 707     };
 708
 709     GuacamoleUI.keyboard.onkeydown = function(keysym) {
 710         guac.sendKeyEvent(1, keysym);
 711     };
 712
 713     GuacamoleUI.keyboard.onkeyup = function(keysym) {
 714         guac.sendKeyEvent(0, keysym);
 715     };
 716
 717     // Send Ctrl-Alt-Delete
 718     GuacamoleUI.buttons.ctrlAltDelete.onclick = function() {
 719
 720         var KEYSYM_CTRL   = 0xFFE3;
 721         var KEYSYM_ALT    = 0xFFE9;
 722         var KEYSYM_DELETE = 0xFFFF;
 723
 724         guac.sendKeyEvent(1, KEYSYM_CTRL);
 725         guac.sendKeyEvent(1, KEYSYM_ALT);
 726         guac.sendKeyEvent(1, KEYSYM_DELETE);
 727         guac.sendKeyEvent(0, KEYSYM_DELETE);
 728         guac.sendKeyEvent(0, KEYSYM_ALT);
 729         guac.sendKeyEvent(0, KEYSYM_CTRL);
 730     };
 731
 732 };