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.onclick =
 280         function(e) {
 281
 282             // Center event target in case browser automatically centers
 283             // input fields on focus.
 284             GuacamoleUI.eventTarget.style.left =
 285                 (window.pageXOffset + GuacamoleUI.viewport.offsetWidth / 2) + "px";
 286
 287             GuacamoleUI.eventTarget.style.top =
 288                 (window.pageYOffset + GuacamoleUI.viewport.offsetHeight / 2) + "px";
 289
 290             GuacamoleUI.eventTarget.focus();
 291             GuacamoleUI.hideTouchMenu();
 292
 293         };
 294
 295     // Logout
 296     GuacamoleUI.buttons.logout.onclick =
 297     GuacamoleUI.buttons.touchLogout.onclick =
 298         function() {
 299             window.location.href = "logout";
 300         };
 301
 302     // Timeouts for detecting if users wants menu to open or close
 303     var detectMenuOpenTimeout = null;
 304     var detectMenuCloseTimeout = null;
 305
 306     // Clear detection timeouts
 307     GuacamoleUI.resetMenuDetect = function() {
 308
 309         if (detectMenuOpenTimeout != null) {
 310             window.clearTimeout(detectMenuOpenTimeout);
 311             detectMenuOpenTimeout = null;
 312         }
 313
 314         if (detectMenuCloseTimeout != null) {
 315             window.clearTimeout(detectMenuCloseTimeout);
 316             detectMenuCloseTimeout = null;
 317         }
 318
 319     };
 320
 321     // Initiate detection of menu open action. If not canceled through some
 322     // user event, menu will open.
 323     GuacamoleUI.startMenuOpenDetect = function() {
 324
 325         if (!detectMenuOpenTimeout) {
 326
 327             // Clear detection state
 328             GuacamoleUI.resetMenuDetect();
 329
 330             // Wait and then show menu
 331             detectMenuOpenTimeout = window.setTimeout(function() {
 332
 333                 // If menu opened via mouse, do not show native OSK
 334                 GuacamoleUI.oskMode = GuacamoleUI.OSK_MODE_GUAC;
 335
 336                 GuacamoleUI.showMenu();
 337                 detectMenuOpenTimeout = null;
 338             }, GuacamoleUI.MENU_OPEN_DETECT_TIMEOUT);
 339
 340         }
 341
 342     };
 343
 344     // Initiate detection of menu close action. If not canceled through some
 345     // user mouse event, menu will close.
 346     GuacamoleUI.startMenuCloseDetect = function() {
 347
 348         if (!detectMenuCloseTimeout) {
 349
 350             // Clear detection state
 351             GuacamoleUI.resetMenuDetect();
 352
 353             // Wait and then shade menu
 354             detectMenuCloseTimeout = window.setTimeout(function() {
 355                 GuacamoleUI.shadeMenu();
 356                 detectMenuCloseTimeout = null;
 357             }, GuacamoleUI.MENU_CLOSE_DETECT_TIMEOUT);
 358
 359         }
 360
 361     };
 362
 363     // Show menu if mouseover any part of menu
 364     GuacamoleUI.menu.addEventListener('mouseover', GuacamoleUI.showMenu, true);
 365
 366     // Stop detecting menu state change intents if mouse is over menu
 367     GuacamoleUI.menu.addEventListener('mouseover', GuacamoleUI.resetMenuDetect, true);
 368
 369     // When mouse hovers over top of screen, start detection of intent to open menu
 370     GuacamoleUI.menuControl.addEventListener('mousemove', GuacamoleUI.startMenuOpenDetect, true);
 371
 372     var long_press_start_x = 0;
 373     var long_press_start_y = 0;
 374     var menuShowLongPressTimeout = null;
 375
 376     GuacamoleUI.startLongPressDetect = function() {
 377
 378         if (!menuShowLongPressTimeout) {
 379
 380             menuShowLongPressTimeout = window.setTimeout(function() {
 381
 382                 menuShowLongPressTimeout = null;
 383
 384                 // Assume native OSK if menu shown via long-press
 385                 GuacamoleUI.oskMode = GuacamoleUI.OSK_MODE_NATIVE;
 386                 GuacamoleUI.showTouchMenu();
 387
 388             }, GuacamoleUI.LONG_PRESS_DETECT_TIMEOUT);
 389
 390         }
 391     };
 392
 393     GuacamoleUI.stopLongPressDetect = function() {
 394         window.clearTimeout(menuShowLongPressTimeout);
 395         menuShowLongPressTimeout = null;
 396     };
 397
 398     // Detect long-press at bottom of screen
 399     GuacamoleUI.display.addEventListener('touchstart', function(e) {
 400
 401         // Close menu if shown
 402         GuacamoleUI.shadeMenu();
 403         GuacamoleUI.hideTouchMenu();
 404
 405         // Record touch location
 406         if (e.touches.length == 1) {
 407             var touch = e.touches[0];
 408             long_press_start_x = touch.screenX;
 409             long_press_start_y = touch.screenY;
 410         }
 411
 412         // Start detection
 413         GuacamoleUI.startLongPressDetect();
 414
 415     }, true);
 416
 417     // Stop detection if touch moves significantly
 418     GuacamoleUI.display.addEventListener('touchmove', function(e) {
 419
 420         // If touch distance from start exceeds threshold, cancel long press
 421         var touch = e.touches[0];
 422         if (Math.abs(touch.screenX - long_press_start_x) >= GuacamoleUI.LONG_PRESS_MOVEMENT_THRESHOLD
 423             || Math.abs(touch.screenY - long_press_start_y) >= GuacamoleUI.LONG_PRESS_MOVEMENT_THRESHOLD)
 424             GuacamoleUI.stopLongPressDetect();
 425
 426     }, true);
 427
 428     // Stop detection if press stops
 429     GuacamoleUI.display.addEventListener('touchend', GuacamoleUI.stopLongPressDetect, true);
 430
 431     // Close menu on mouse movement
 432     GuacamoleUI.display.addEventListener('mousemove', GuacamoleUI.startMenuCloseDetect, true);
 433     GuacamoleUI.display.addEventListener('mousedown', GuacamoleUI.startMenuCloseDetect, true);
 434
 435     // Reconnect button
 436     GuacamoleUI.buttons.reconnect.onclick = function() {
 437         window.location.reload();
 438     };
 439
 440     // On-screen keyboard
 441     GuacamoleUI.keyboard = new Guacamole.OnScreenKeyboard("layouts/en-us-qwerty-mobile.xml");
 442     GuacamoleUI.containers.keyboard.appendChild(GuacamoleUI.keyboard.getElement());
 443
 444     // Function for automatically updating keyboard size
 445     var lastKeyboardWidth;
 446     function updateKeyboardSize() {
 447         var currentSize = GuacamoleUI.keyboard.getElement().offsetWidth;
 448         if (lastKeyboardWidth != currentSize) {
 449             GuacamoleUI.keyboard.resize(currentSize);
 450             lastKeyboardWidth = currentSize;
 451         }
 452     };
 453
 454     // Turn off autocorrect and autocapitalization on eventTarget
 455     GuacamoleUI.eventTarget.setAttribute("autocorrect", "off");
 456     GuacamoleUI.eventTarget.setAttribute("autocapitalize", "off");
 457
 458     // Automatically reposition event target on scroll
 459     window.addEventListener("scroll", function() {
 460         GuacamoleUI.eventTarget.style.left = window.pageXOffset + "px";
 461         GuacamoleUI.eventTarget.style.top = window.pageYOffset + "px";
 462     });
 463
 464 })();
 465
 466 // Tie UI events / behavior to a specific Guacamole client
 467 GuacamoleUI.attach = function(guac) {
 468
 469     var title_prefix = null;
 470     var connection_name = "Guacamole";
 471
 472     var guac_display = guac.getDisplay();
 473
 474     // Set document title appropriately, based on prefix and connection name
 475     function updateTitle() {
 476
 477         // Use title prefix if present
 478         if (title_prefix) {
 479
 480             document.title = title_prefix;
 481
 482             // Include connection name, if present
 483             if (connection_name)
 484                 document.title += " " + connection_name;
 485
 486         }
 487
 488         // Otherwise, just set to connection name
 489         else if (connection_name)
 490             document.title = connection_name;
 491
 492     }
 493
 494     // When mouse enters display, start detection of intent to close menu
 495     guac_display.addEventListener('mouseover', GuacamoleUI.startMenuCloseDetect, true);
 496
 497     guac_display.onclick = function(e) {
 498         e.preventDefault();
 499         return false;
 500     };
 501
 502     // Mouse
 503     var mouse = new Guacamole.Mouse(guac_display);
 504     mouse.onmousedown = mouse.onmouseup = mouse.onmousemove =
 505         function(mouseState) {
 506
 507             // Determine mouse position within view
 508             var mouse_view_x = mouseState.x + guac_display.offsetLeft - window.pageXOffset;
 509             var mouse_view_y = mouseState.y + guac_display.offsetTop  - window.pageYOffset;
 510
 511             // Determine viewport dimensioins
 512             var view_width  = GuacamoleUI.viewport.offsetWidth;
 513             var view_height = GuacamoleUI.viewport.offsetHeight;
 514
 515             // Determine scroll amounts based on mouse position relative to document
 516
 517             var scroll_amount_x;
 518             if (mouse_view_x > view_width)
 519                 scroll_amount_x = mouse_view_x - view_width;
 520             else if (mouse_view_x < 0)
 521                 scroll_amount_x = mouse_view_x;
 522             else
 523                 scroll_amount_x = 0;
 524
 525             var scroll_amount_y;
 526             if (mouse_view_y > view_height)
 527                 scroll_amount_y = mouse_view_y - view_height;
 528             else if (mouse_view_y < 0)
 529                 scroll_amount_y = mouse_view_y;
 530             else
 531                 scroll_amount_y = 0;
 532
 533             // Scroll (if necessary) to keep mouse on screen.
 534             window.scrollBy(scroll_amount_x, scroll_amount_y);
 535
 536             // Send mouse event
 537             guac.sendMouseState(mouseState);
 538
 539         };
 540
 541     // Keyboard
 542     var keyboard = new Guacamole.Keyboard(document);
 543
 544     // Monitor whether the event target is focused
 545     var eventTargetFocused = false;
 546
 547     // Save length for calculation of changed value
 548     var currentLength = GuacamoleUI.eventTarget.value.length;
 549
 550     GuacamoleUI.eventTarget.onfocus = function() {
 551         eventTargetFocused = true;
 552         GuacamoleUI.eventTarget.value = "";
 553         currentLength = 0;
 554     };
 555
 556     GuacamoleUI.eventTarget.onblur = function() {
 557         eventTargetFocused = false;
 558     };
 559
 560     // If text is input directly into event target without typing (as with
 561     // voice input, for example), type automatically.
 562     GuacamoleUI.eventTarget.oninput = function(e) {
 563
 564         // Calculate current length and change in length
 565         var oldLength = currentLength;
 566         currentLength = GuacamoleUI.eventTarget.value.length;
 567
 568         // If deleted or replaced text, ignore
 569         if (currentLength <= oldLength)
 570             return;
 571
 572         // Get changed text
 573         var text = GuacamoleUI.eventTarget.value.substring(oldLength);
 574
 575         // Send each character
 576         for (var i=0; i<text.length; i++) {
 577
 578             // Get char code
 579             var charCode = text.charCodeAt(i);
 580
 581             // Convert to keysym
 582             var keysym = 0x003F; // Default to a question mark
 583             if (charCode >= 0x0000 && charCode <= 0x00FF)
 584                 keysym = charCode;
 585             else if (charCode >= 0x0100 && charCode <= 0x10FFFF)
 586                 keysym = 0x01000000 | charCode;
 587
 588             // Send keysym only if not already pressed
 589             if (!keyboard.pressed[keysym]) {
 590
 591                 // Press and release key
 592                 guac.sendKeyEvent(1, keysym);
 593                 guac.sendKeyEvent(0, keysym);
 594
 595             }
 596
 597         }
 598
 599     }
 600
 601     function isTypableCharacter(keysym) {
 602         return (keysym & 0xFFFF00) != 0xFF00;
 603     }
 604
 605     function disableKeyboard() {
 606         keyboard.onkeydown = null;
 607         keyboard.onkeyup = null;
 608     }
 609
 610     function enableKeyboard() {
 611
 612         keyboard.onkeydown = function (keysym) {
 613             guac.sendKeyEvent(1, keysym);
 614             return eventTargetFocused && isTypableCharacter(keysym);
 615         };
 616
 617         keyboard.onkeyup = function (keysym) {
 618             guac.sendKeyEvent(0, keysym);
 619             return eventTargetFocused && isTypableCharacter(keysym);
 620         };
 621
 622     }
 623
 624     // Enable keyboard by default
 625     enableKeyboard();
 626
 627     // Handle client state change
 628     guac.onstatechange = function(clientState) {
 629
 630         switch (clientState) {
 631
 632             // Idle
 633             case 0:
 634                 GuacamoleUI.showStatus("Idle.");
 635                 title_prefix = "[Idle]";
 636                 break;
 637
 638             // Connecting
 639             case 1:
 640                 GuacamoleUI.shadeMenu();
 641                 GuacamoleUI.showStatus("Connecting...");
 642                 title_prefix = "[Connecting...]";
 643                 break;
 644
 645             // Connected + waiting
 646             case 2:
 647                 GuacamoleUI.showStatus("Connected, waiting for first update...");
 648                 title_prefix = "[Waiting...]";
 649                 break;
 650
 651             // Connected
 652             case 3:
 653                 GuacamoleUI.hideStatus();
 654                 title_prefix = null;
 655                 break;
 656
 657             // Disconnecting
 658             case 4:
 659                 GuacamoleUI.showStatus("Disconnecting...");
 660                 title_prefix = "[Disconnecting...]";
 661                 break;
 662
 663             // Disconnected
 664             case 5:
 665                 GuacamoleUI.showStatus("Disconnected.");
 666                 title_prefix = "[Disconnected]";
 667                 break;
 668
 669             // Unknown status code
 670             default:
 671                 GuacamoleUI.showStatus("[UNKNOWN STATUS]");
 672
 673         }
 674
 675         updateTitle();
 676     };
 677
 678     // Name instruction handler
 679     guac.onname = function(name) {
 680         connection_name = name;
 681         updateTitle();
 682     };
 683
 684     // Error handler
 685     guac.onerror = function(error) {
 686
 687         // Disconnect, if connected
 688         guac.disconnect();
 689
 690         // Display error message
 691         GuacamoleUI.showError(error);
 692
 693     };
 694
 695     // Disconnect on close
 696     window.onunload = function() {
 697         guac.disconnect();
 698     };
 699
 700     // Handle clipboard events
 701     GuacamoleUI.clipboard.onchange = function() {
 702
 703         var text = GuacamoleUI.clipboard.value;
 704         guac.setClipboard(text);
 705
 706     };
 707
 708     // Ignore keypresses when clipboard is focused
 709     GuacamoleUI.clipboard.onfocus = function() {
 710         disableKeyboard();
 711     };
 712
 713     // Capture keypresses when clipboard is not focused
 714     GuacamoleUI.clipboard.onblur = function() {
 715         enableKeyboard();
 716     };
 717
 718     // Server copy handler
 719     guac.onclipboard = function(data) {
 720         GuacamoleUI.clipboard.value = data;
 721     };
 722
 723     GuacamoleUI.keyboard.onkeydown = function(keysym) {
 724         guac.sendKeyEvent(1, keysym);
 725     };
 726
 727     GuacamoleUI.keyboard.onkeyup = function(keysym) {
 728         guac.sendKeyEvent(0, keysym);
 729     };
 730
 731     // Send Ctrl-Alt-Delete
 732     GuacamoleUI.buttons.ctrlAltDelete.onclick = function() {
 733
 734         var KEYSYM_CTRL   = 0xFFE3;
 735         var KEYSYM_ALT    = 0xFFE9;
 736         var KEYSYM_DELETE = 0xFFFF;
 737
 738         guac.sendKeyEvent(1, KEYSYM_CTRL);
 739         guac.sendKeyEvent(1, KEYSYM_ALT);
 740         guac.sendKeyEvent(1, KEYSYM_DELETE);
 741         guac.sendKeyEvent(0, KEYSYM_DELETE);
 742         guac.sendKeyEvent(0, KEYSYM_ALT);
 743         guac.sendKeyEvent(0, KEYSYM_CTRL);
 744     };
 745
 746 };