2 /* ***** BEGIN LICENSE BLOCK *****
3 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
5 * The contents of this file are subject to the Mozilla Public License Version
6 * 1.1 (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 * http://www.mozilla.org/MPL/
10 * Software distributed under the License is distributed on an "AS IS" basis,
11 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 * for the specific language governing rights and limitations under the
15 * The Original Code is guacamole-common-js.
17 * The Initial Developer of the Original Code is
19 * Portions created by the Initial Developer are Copyright (C) 2010
20 * the Initial Developer. All Rights Reserved.
25 * Alternatively, the contents of this file may be used under the terms of
26 * either the GNU General Public License Version 2 or later (the "GPL"), or
27 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 * in which case the provisions of the GPL or the LGPL are applicable instead
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34 * the provisions above, a recipient may use your version of this file under
35 * the terms of any one of the MPL, the GPL or the LGPL.
37 * ***** END LICENSE BLOCK ***** */
39 // Guacamole namespace
40 var Guacamole = Guacamole || {};
44 * Guacamole protocol client. Given a display element and {@link Guacamole.Tunnel},
45 * automatically handles incoming and outgoing Guacamole instructions via the
46 * provided tunnel, updating the display using one or more canvas elements.
49 * @param {Guacamole.Tunnel} tunnel The tunnel to use to send and receive
50 * Guacamole instructions.
52 Guacamole.Client = function(tunnel) {
54 var guac_client = this;
57 var STATE_CONNECTING = 1;
58 var STATE_WAITING = 2;
59 var STATE_CONNECTED = 3;
60 var STATE_DISCONNECTING = 4;
61 var STATE_DISCONNECTED = 5;
63 var currentState = STATE_IDLE;
65 var currentTimestamp = 0;
66 var pingInterval = null;
69 var displayHeight = 0;
72 var display = document.createElement("div");
73 display.style.position = "relative";
74 display.style.width = displayWidth + "px";
75 display.style.height = displayHeight + "px";
77 // Create default layer
78 var default_layer_container = new Guacamole.Client.LayerContainer(displayWidth, displayHeight);
80 // Position default layer
81 var default_layer_container_element = default_layer_container.getElement();
82 default_layer_container_element.style.position = "absolute";
83 default_layer_container_element.style.left = "0px";
84 default_layer_container_element.style.top = "0px";
86 // Create cursor layer
87 var cursor = new Guacamole.Client.LayerContainer(0, 0);
88 cursor.getLayer().setChannelMask(Guacamole.Layer.SRC);
90 // Position cursor layer
91 var cursor_element = cursor.getElement();
92 cursor_element.style.position = "absolute";
93 cursor_element.style.left = "0px";
94 cursor_element.style.top = "0px";
96 // Add default layer and cursor to display
97 display.appendChild(default_layer_container.getElement());
98 display.appendChild(cursor.getElement());
100 // Initially, only default layer exists
101 var layers = [default_layer_container];
103 // No initial buffers
106 tunnel.onerror = function(message) {
107 if (guac_client.onerror)
108 guac_client.onerror(message);
111 function setState(state) {
112 if (state != currentState) {
113 currentState = state;
114 if (guac_client.onstatechange)
115 guac_client.onstatechange(currentState);
119 function isConnected() {
120 return currentState == STATE_CONNECTED
121 || currentState == STATE_WAITING;
124 var cursorHotspotX = 0;
125 var cursorHotspotY = 0;
130 function moveCursor(x, y) {
132 var element = cursor.getElement();
135 element.style.left = (x - cursorHotspotX) + "px";
136 element.style.top = (y - cursorHotspotY) + "px";
138 // Update stored position
144 guac_client.getDisplay = function() {
148 guac_client.sendKeyEvent = function(pressed, keysym) {
149 // Do not send requests if not connected
153 tunnel.sendMessage("key", keysym, pressed);
156 guac_client.sendMouseState = function(mouseState) {
158 // Do not send requests if not connected
162 // Update client-side cursor
170 if (mouseState.left) buttonMask |= 1;
171 if (mouseState.middle) buttonMask |= 2;
172 if (mouseState.right) buttonMask |= 4;
173 if (mouseState.up) buttonMask |= 8;
174 if (mouseState.down) buttonMask |= 16;
177 tunnel.sendMessage("mouse", mouseState.x, mouseState.y, buttonMask);
180 guac_client.setClipboard = function(data) {
182 // Do not send requests if not connected
186 tunnel.sendMessage("clipboard", data);
190 guac_client.onstatechange = null;
191 guac_client.onname = null;
192 guac_client.onerror = null;
193 guac_client.onclipboard = null;
196 function getBufferLayer(index) {
199 var buffer = buffers[index];
201 // Create buffer if necessary
202 if (buffer == null) {
203 buffer = new Guacamole.Layer(0, 0);
205 buffers[index] = buffer;
212 function getLayerContainer(index) {
214 var layer = layers[index];
218 layer = new Guacamole.Client.LayerContainer(displayWidth, displayHeight);
219 layers[index] = layer;
221 // Get and position layer
222 var layer_element = layer.getElement();
223 layer_element.style.position = "absolute";
224 layer_element.style.left = "0px";
225 layer_element.style.top = "0px";
227 // Add to default layer container
228 default_layer_container.getElement().appendChild(layer_element);
236 function getLayer(index) {
238 // If buffer, just get layer
240 return getBufferLayer(index);
242 // Otherwise, retrieve layer from layer container
243 return getLayerContainer(index).getLayer();
247 var instructionHandlers = {
249 "cfill": function(parameters) {
251 var channelMask = parseInt(parameters[0]);
252 var layer = getLayer(parseInt(parameters[1]));
253 var r = parseInt(parameters[2]);
254 var g = parseInt(parameters[3]);
255 var b = parseInt(parameters[4]);
256 var a = parseInt(parameters[5]);
258 layer.setChannelMask(channelMask);
260 layer.fillColor(r, g, b, a);
264 "clip": function(parameters) {
266 var layer = getLayer(parseInt(parameters[0]));
272 "clipboard": function(parameters) {
273 if (guac_client.onclipboard) guac_client.onclipboard(parameters[0]);
276 "copy": function(parameters) {
278 var srcL = getLayer(parseInt(parameters[0]));
279 var srcX = parseInt(parameters[1]);
280 var srcY = parseInt(parameters[2]);
281 var srcWidth = parseInt(parameters[3]);
282 var srcHeight = parseInt(parameters[4]);
283 var channelMask = parseInt(parameters[5]);
284 var dstL = getLayer(parseInt(parameters[6]));
285 var dstX = parseInt(parameters[7]);
286 var dstY = parseInt(parameters[8]);
288 dstL.setChannelMask(channelMask);
302 "cursor": function(parameters) {
304 cursorHotspotX = parseInt(parameters[0]);
305 cursorHotspotY = parseInt(parameters[1]);
306 var srcL = getLayer(parseInt(parameters[2]));
307 var srcX = parseInt(parameters[3]);
308 var srcY = parseInt(parameters[4]);
309 var srcWidth = parseInt(parameters[5]);
310 var srcHeight = parseInt(parameters[6]);
313 cursor.resize(srcWidth, srcHeight);
315 // Draw cursor to cursor layer
316 cursor.getLayer().copy(
326 // Update cursor position (hotspot may have changed)
327 moveCursor(cursorX, cursorY);
331 "dispose": function(parameters) {
333 var layer_index = parseInt(parameters[0]);
335 // If visible layer, remove from parent
336 if (layer_index > 0) {
338 // Get container element
339 var layer_container = getLayerContainer(layer_index).getElement();
341 // Remove from parent
342 layer_container.parentNode.removeChild(layer_container);
345 delete layers[layer_index];
349 // If buffer, just delete reference
350 else if (layer_index < 0)
351 delete buffers[-1 - layer_index];
353 // Attempting to dispose the root layer currently has no effect.
357 "error": function(parameters) {
358 if (guac_client.onerror) guac_client.onerror(parameters[0]);
359 guac_client.disconnect();
362 "move": function(parameters) {
364 var layer_index = parseInt(parameters[0]);
365 var parent_index = parseInt(parameters[1]);
366 var x = parseInt(parameters[2]);
367 var y = parseInt(parameters[3]);
368 var z = parseInt(parameters[4]);
370 // Only valid for non-default layers
371 if (layer_index > 0 && parent_index >= 0) {
373 // Get container element
374 var layer_container = getLayerContainer(layer_index).getElement();
375 var parent = getLayerContainer(parent_index).getElement();
377 // Set parent if necessary
378 if (!(layer_container.parentNode === parent))
379 parent.appendChild(layer_container);
382 layer_container.style.left = x + "px";
383 layer_container.style.top = y + "px";
384 layer_container.style.zIndex = z;
390 "name": function(parameters) {
391 if (guac_client.onname) guac_client.onname(parameters[0]);
394 "png": function(parameters) {
396 var channelMask = parseInt(parameters[0]);
397 var layer = getLayer(parseInt(parameters[1]));
398 var x = parseInt(parameters[2]);
399 var y = parseInt(parameters[3]);
400 var data = parameters[4];
402 layer.setChannelMask(channelMask);
407 "data:image/png;base64," + data
410 // If received first update, no longer waiting.
411 if (currentState == STATE_WAITING)
412 setState(STATE_CONNECTED);
416 "rect": function(parameters) {
418 var layer = getLayer(parseInt(parameters[0]));
419 var x = parseInt(parameters[1]);
420 var y = parseInt(parameters[2]);
421 var w = parseInt(parameters[3]);
422 var h = parseInt(parameters[4]);
424 layer.rect(x, y, w, h);
428 "reset": function(parameters) {
430 var layer = getLayer(parseInt(parameters[0]));
436 "size": function(parameters) {
438 var layer_index = parseInt(parameters[0]);
439 var width = parseInt(parameters[1]);
440 var height = parseInt(parameters[2]);
443 var layer_container = getLayerContainer(layer_index);
444 layer_container.resize(width, height);
446 // If layer is default, resize display
447 if (layer_index == 0) {
449 displayWidth = width;
450 displayHeight = height;
452 // Update (set) display size
453 display.style.width = displayWidth + "px";
454 display.style.height = displayHeight + "px";
460 "sync": function(parameters) {
462 var timestamp = parameters[0];
464 // When all layers have finished rendering all instructions
465 // UP TO THIS POINT IN TIME, send sync response.
467 var layersToSync = 0;
468 function syncLayer() {
472 // Send sync response when layers are finished
473 if (layersToSync == 0) {
474 if (timestamp != currentTimestamp) {
475 tunnel.sendMessage("sync", timestamp);
476 currentTimestamp = timestamp;
482 // Count active, not-ready layers and install sync tracking hooks
483 for (var i=0; i<layers.length; i++) {
485 var layer = layers[i].getLayer();
486 if (layer && !layer.isReady()) {
488 layer.sync(syncLayer);
493 // If all layers are ready, then we didn't install any hooks.
494 // Send sync message now,
495 if (layersToSync == 0) {
496 if (timestamp != currentTimestamp) {
497 tunnel.sendMessage("sync", timestamp);
498 currentTimestamp = timestamp;
504 "transfer": function(parameters) {
506 var srcL = getLayer(parseInt(parameters[0]));
507 var srcX = parseInt(parameters[1]);
508 var srcY = parseInt(parameters[2]);
509 var srcWidth = parseInt(parameters[3]);
510 var srcHeight = parseInt(parameters[4]);
511 var transferFunction = Guacamole.Client.DefaultTransferFunction[parameters[5]];
512 var dstL = getLayer(parseInt(parameters[6]));
513 var dstX = parseInt(parameters[7]);
514 var dstY = parseInt(parameters[8]);
532 tunnel.oninstruction = function(opcode, parameters) {
534 var handler = instructionHandlers[opcode];
541 guac_client.disconnect = function() {
543 // Only attempt disconnection not disconnected.
544 if (currentState != STATE_DISCONNECTED
545 && currentState != STATE_DISCONNECTING) {
547 setState(STATE_DISCONNECTING);
551 window.clearInterval(pingInterval);
553 // Send disconnect message and disconnect
554 tunnel.sendMessage("disconnect");
556 setState(STATE_DISCONNECTED);
562 guac_client.connect = function(data) {
564 setState(STATE_CONNECTING);
567 tunnel.connect(data);
570 setState(STATE_IDLE);
574 // Ping every 5 seconds (ensure connection alive)
575 pingInterval = window.setInterval(function() {
576 tunnel.sendMessage("sync", currentTimestamp);
579 setState(STATE_WAITING);
586 * Simple container for Guacamole.Layer, allowing layers to be easily
587 * repositioned and nested. This allows certain operations to be accelerated
588 * through DOM manipulation, rather than raster operations.
592 * @param {Number} width The width of the Layer, in pixels. The canvas element
593 * backing this Layer will be given this width.
595 * @param {Number} height The height of the Layer, in pixels. The canvas element
596 * backing this Layer will be given this height.
598 Guacamole.Client.LayerContainer = function(width, height) {
601 * Reference to this LayerContainer.
604 var layer_container = this;
606 // Create layer with given size
607 var layer = new Guacamole.Layer(width, height);
609 // Set layer position
610 var canvas = layer.getCanvas();
611 canvas.style.position = "absolute";
612 canvas.style.left = "0px";
613 canvas.style.top = "0px";
615 // Create div with given size
616 var div = document.createElement("div");
617 div.appendChild(canvas);
618 div.style.width = width + "px";
619 div.style.height = height + "px";
622 * Changes the size of this LayerContainer and the contained Layer to the
623 * given width and height.
625 * @param {Number} width The new width to assign to this Layer.
626 * @param {Number} height The new height to assign to this Layer.
628 layer_container.resize = function(width, height) {
631 layer.resize(width, height);
633 // Resize containing div
634 div.style.width = width + "px";
635 div.style.height = height + "px";
640 * Returns the Layer contained within this LayerContainer.
641 * @returns {Guacamole.Layer} The Layer contained within this LayerContainer.
643 layer_container.getLayer = function() {
648 * Returns the element containing the Layer within this LayerContainer.
649 * @returns {Element} The element containing the Layer within this LayerContainer.
651 layer_container.getElement = function() {
658 * Map of all Guacamole binary raster operations to transfer functions.
661 Guacamole.Client.DefaultTransferFunction = {
664 0x0: function (src, dst) {
665 dst.red = dst.green = dst.blue = 0x00;
669 0xF: function (src, dst) {
670 dst.red = dst.green = dst.blue = 0xFF;
674 0x3: function (src, dst) {
676 dst.green = src.green;
678 dst.alpha = src.alpha;
682 0x5: function (src, dst) {
687 0xC: function (src, dst) {
688 dst.red = 0xFF & ~src.red;
689 dst.green = 0xFF & ~src.green;
690 dst.blue = 0xFF & ~src.blue;
691 dst.alpha = src.alpha;
695 0xA: function (src, dst) {
696 dst.red = 0xFF & ~dst.red;
697 dst.green = 0xFF & ~dst.green;
698 dst.blue = 0xFF & ~dst.blue;
702 0x1: function (src, dst) {
703 dst.red = ( src.red & dst.red);
704 dst.green = ( src.green & dst.green);
705 dst.blue = ( src.blue & dst.blue);
709 0xE: function (src, dst) {
710 dst.red = 0xFF & ~( src.red & dst.red);
711 dst.green = 0xFF & ~( src.green & dst.green);
712 dst.blue = 0xFF & ~( src.blue & dst.blue);
716 0x7: function (src, dst) {
717 dst.red = ( src.red | dst.red);
718 dst.green = ( src.green | dst.green);
719 dst.blue = ( src.blue | dst.blue);
723 0x8: function (src, dst) {
724 dst.red = 0xFF & ~( src.red | dst.red);
725 dst.green = 0xFF & ~( src.green | dst.green);
726 dst.blue = 0xFF & ~( src.blue | dst.blue);
730 0x6: function (src, dst) {
731 dst.red = ( src.red ^ dst.red);
732 dst.green = ( src.green ^ dst.green);
733 dst.blue = ( src.blue ^ dst.blue);
737 0x9: function (src, dst) {
738 dst.red = 0xFF & ~( src.red ^ dst.red);
739 dst.green = 0xFF & ~( src.green ^ dst.green);
740 dst.blue = 0xFF & ~( src.blue ^ dst.blue);
743 /* AND inverted source */
744 0x4: function (src, dst) {
745 dst.red = 0xFF & (~src.red & dst.red);
746 dst.green = 0xFF & (~src.green & dst.green);
747 dst.blue = 0xFF & (~src.blue & dst.blue);
750 /* OR inverted source */
751 0xD: function (src, dst) {
752 dst.red = 0xFF & (~src.red | dst.red);
753 dst.green = 0xFF & (~src.green | dst.green);
754 dst.blue = 0xFF & (~src.blue | dst.blue);
757 /* AND inverted destination */
758 0x2: function (src, dst) {
759 dst.red = 0xFF & ( src.red & ~dst.red);
760 dst.green = 0xFF & ( src.green & ~dst.green);
761 dst.blue = 0xFF & ( src.blue & ~dst.blue);
764 /* OR inverted destination */
765 0xB: function (src, dst) {
766 dst.red = 0xFF & ( src.red | ~dst.red);
767 dst.green = 0xFF & ( src.green | ~dst.green);
768 dst.blue = 0xFF & ( src.blue | ~dst.blue);