Merge branch 'unstable' into touch-support

Conflicts:
	src/main/resources/mouse.js

guacamole-common-js/src/main/resources/guacamole.js

@@ -16,7 +16,22 @@
  *  You should have received a copy of the GNU Affero General Public License
  */
 
-function GuacamoleClient(display, tunnel) {
+// Guacamole namespace
+var Guacamole = Guacamole || {};
+
+/**
+ * Guacamole protocol client. Given a display element and {@link Guacamole.Tunnel},
+ * automatically handles incoming and outgoing Guacamole instructions via the
+ * provided tunnel, updating the display using one or more canvas elements.
+ * 
+ * @constructor
+ * @param {Element} display The display element to add canvas elements to.
+ * @param {Guacamole.Tunnel} tunnel The tunnel to use to send and receive
+ *                                  Guacamole instructions.
+ */
+Guacamole.Client = function(display, tunnel) {
+
+    var guac_client = this;
 
     var STATE_IDLE          = 0;
     var STATE_CONNECTING    = 1;
@@ -26,9 +41,13 @@ function GuacamoleClient(display, tunnel) {
     var STATE_DISCONNECTED  = 5;
 
     var currentState = STATE_IDLE;
-    var stateChangeHandler = null;
 
-    tunnel.setInstructionHandler(doInstruction);
+    tunnel.oninstruction = doInstruction;
+
+    tunnel.onerror = function(message) {
+        if (guac_client.onerror)
+            guac_client.onerror(message);
+    };
 
     // Display must be relatively positioned for mouse to be handled properly
     display.style.position = "relative";
@@ -36,15 +55,11 @@ function GuacamoleClient(display, tunnel) {
     function setState(state) {
         if (state != currentState) {
             currentState = state;
-            if (stateChangeHandler)
+            if (guac_client.onstatechange)
-                stateChangeHandler(currentState);
+                guac_client.onstatechange(currentState);
         }
     }
 
-    this.setOnStateChangeHandler = function(handler) {
-        stateChangeHandler = handler;
-    };
-
     function isConnected() {
         return currentState == STATE_CONNECTED
             || currentState == STATE_WAITING;
@@ -54,7 +69,6 @@ function GuacamoleClient(display, tunnel) {
     var cursorHotspotX = 0;
     var cursorHotspotY = 0;
 
-    // FIXME: Make object. Clean up.
     var cursorRectX = 0;
     var cursorRectY = 0;
     var cursorRectW = 0;
@@ -83,7 +97,7 @@ function GuacamoleClient(display, tunnel) {
         cursor.drawImage(cursorRectX, cursorRectY, cursorImage);
     }
 
-    this.sendKeyEvent = function(pressed, keysym) {
+    guac_client.sendKeyEvent = function(pressed, keysym) {
         // Do not send requests if not connected
         if (!isConnected())
             return;
@@ -91,7 +105,7 @@ function GuacamoleClient(display, tunnel) {
         tunnel.sendMessage("key:" +  keysym + "," + pressed + ";");
     };
 
-    this.sendMouseState = function(mouseState) {
+    guac_client.sendMouseState = function(mouseState) {
 
         // Do not send requests if not connected
         if (!isConnected())
@@ -100,24 +114,24 @@ function GuacamoleClient(display, tunnel) {
         // Draw client-side cursor
         if (cursorImage != null) {
             redrawCursor(
-                mouseState.getX(),
+                mouseState.x,
-                mouseState.getY()
+                mouseState.y
             );
         }
 
         // Build mask
         var buttonMask = 0;
-        if (mouseState.getLeft())   buttonMask |= 1;
+        if (mouseState.left)   buttonMask |= 1;
-        if (mouseState.getMiddle()) buttonMask |= 2;
+        if (mouseState.middle) buttonMask |= 2;
-        if (mouseState.getRight())  buttonMask |= 4;
+        if (mouseState.right)  buttonMask |= 4;
-        if (mouseState.getUp())     buttonMask |= 8;
+        if (mouseState.up)     buttonMask |= 8;
-        if (mouseState.getDown())   buttonMask |= 16;
+        if (mouseState.down)   buttonMask |= 16;
 
         // Send message
-        tunnel.sendMessage("mouse:" + mouseState.getX() + "," + mouseState.getY() + "," + buttonMask + ";");
+        tunnel.sendMessage("mouse:" + mouseState.x + "," + mouseState.y + "," + buttonMask + ";");
     };
 
-    this.setClipboard = function(data) {
+    guac_client.setClipboard = function(data) {
 
         // Do not send requests if not connected
         if (!isConnected())
@@ -127,21 +141,10 @@ function GuacamoleClient(display, tunnel) {
     };
 
     // Handlers
-
+    guac_client.onstatechange = null;
-    var nameHandler = null;
+    guac_client.onname = null;
-    this.setNameHandler = function(handler) {
+    guac_client.onerror = null;
-        nameHandler = handler;
+    guac_client.onclipboard = null;
-    }
-
-    var errorHandler = null;
-    this.setErrorHandler = function(handler) {
-        errorHandler = handler;
-    };
-
-    var clipboardHandler = null;
-    this.setClipboardHandler = function(handler) {
-        clipboardHandler = handler;
-    };
 
     // Layers
     var displayWidth = 0;
@@ -151,7 +154,7 @@ function GuacamoleClient(display, tunnel) {
     var buffers = new Array();
     var cursor = null;
 
-    this.getLayers = function() {
+    guac_client.getLayers = function() {
         return layers;
     };
 
@@ -165,8 +168,8 @@ function GuacamoleClient(display, tunnel) {
 
             // Create buffer if necessary
             if (buffer == null) {
-                buffer = new Layer(0, 0);
+                buffer = new Guacamole.Layer(0, 0);
-                buffer.setAutosize(1);
+                buffer.autosize = 1;
                 buffers[index] = buffer;
             }
 
@@ -180,7 +183,14 @@ function GuacamoleClient(display, tunnel) {
             if (layer == null) {
 
                 // Add new layer
-                layer = new Layer(displayWidth, displayHeight);
+                layer = new Guacamole.Layer(displayWidth, displayHeight);
+                
+                // Set layer position
+                var canvas = layer.getCanvas();
+                canvas.style.position = "absolute";
+                canvas.style.left = "0px";
+                canvas.style.top = "0px";
+
                 layers[index] = layer;
 
                 // (Re)-add existing layers in order
@@ -189,18 +199,18 @@ function GuacamoleClient(display, tunnel) {
 
                         // If already present, remove
                         if (layers[i].parentNode === display)
-                            display.removeChild(layers[i]);
+                            display.removeChild(layers[i].getCanvas());
 
                         // Add to end
-                        display.appendChild(layers[i]);
+                        display.appendChild(layers[i].getCanvas());
                     }
                 }
 
                 // Add cursor layer last
                 if (cursor != null) {
                     if (cursor.parentNode === display)
-                        display.removeChild(cursor);
+                        display.removeChild(cursor.getCanvas());
-                    display.appendChild(cursor);
+                    display.appendChild(cursor.getCanvas());
                 }
 
             }
@@ -217,16 +227,16 @@ function GuacamoleClient(display, tunnel) {
     var instructionHandlers = {
 
         "error": function(parameters) {
-            if (errorHandler) errorHandler(unescapeGuacamoleString(parameters[0]));
+            if (guac_client.onerror) guac_client.onerror(unescapeGuacamoleString(parameters[0]));
             disconnect();
         },
 
         "name": function(parameters) {
-            if (nameHandler) nameHandler(unescapeGuacamoleString(parameters[0]));
+            if (guac_client.onname) guac_client.onname(unescapeGuacamoleString(parameters[0]));
         },
 
         "clipboard": function(parameters) {
-            if (clipboardHandler) clipboardHandler(unescapeGuacamoleString(parameters[0]));
+            if (guac_client.onclipboard) guac_client.onclipboard(unescapeGuacamoleString(parameters[0]));
         },
 
         "size": function(parameters) {
@@ -292,6 +302,40 @@ function GuacamoleClient(display, tunnel) {
 
         },
 
+        "rect": function(parameters) {
+
+            var channelMask = parseInt(parameters[0]);
+            var layer = getLayer(parseInt(parameters[1]));
+            var x = parseInt(parameters[2]);
+            var y = parseInt(parameters[3]);
+            var w = parseInt(parameters[4]);
+            var h = parseInt(parameters[5]);
+            var r = parseInt(parameters[6]);
+            var g = parseInt(parameters[7]);
+            var b = parseInt(parameters[8]);
+            var a = parseInt(parameters[9]);
+
+            layer.setChannelMask(channelMask);
+
+            layer.drawRect(
+                x, y, w, h,
+                r, g, b, a
+            );
+
+        },
+
+        "clip": function(parameters) {
+
+            var layer = getLayer(parseInt(parameters[0]));
+            var x = parseInt(parameters[1]);
+            var y = parseInt(parameters[2]);
+            var w = parseInt(parameters[3]);
+            var h = parseInt(parameters[4]);
+
+            layer.clipRect(x, y, w, h);
+
+        },
+
         "cursor": function(parameters) {
 
             var x = parseInt(parameters[0]);
@@ -299,8 +343,14 @@ function GuacamoleClient(display, tunnel) {
             var data = parameters[2];
 
             if (cursor == null) {
-                cursor = new Layer(displayWidth, displayHeight);
+                cursor = new Guacamole.Layer(displayWidth, displayHeight);
-                display.appendChild(cursor);
+                
+                var canvas = cursor.getCanvas();
+                canvas.style.position = "absolute";
+                canvas.style.left = "0px";
+                canvas.style.top = "0px";
+
+                display.appendChild(canvas);
             }
 
             // Start cursor image load
@@ -354,7 +404,7 @@ function GuacamoleClient(display, tunnel) {
             if (layersToSync == 0)
                 tunnel.sendMessage("sync:" + timestamp + ";");
 
-        },
+        }
       
     };
 
@@ -433,8 +483,8 @@ function GuacamoleClient(display, tunnel) {
 
     }
 
-    this.disconnect = disconnect;
+    guac_client.disconnect = disconnect;
-    this.connect = function(data) {
+    guac_client.connect = function(data) {
 
         setState(STATE_CONNECTING);
 
@@ -449,7 +499,7 @@ function GuacamoleClient(display, tunnel) {
         setState(STATE_WAITING);
     };
 
-    this.escapeGuacamoleString   = escapeGuacamoleString;
+    guac_client.escapeGuacamoleString   = escapeGuacamoleString;
-    this.unescapeGuacamoleString = unescapeGuacamoleString;
+    guac_client.unescapeGuacamoleString = unescapeGuacamoleString;
 
 }

guacamole-common-js/src/main/resources/keyboard.js

@@ -17,20 +17,105 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-function GuacamoleKeyboard(element) {
+// Guacamole namespace
+var Guacamole = Guacamole || {};
 
-	/*****************************************/
+/**
-	/*** Keyboard Handler                  ***/
+ * Provides cross-browser and cross-keyboard keyboard for a specific element.
-	/*****************************************/
+ * Browser and keyboard layout variation is abstracted away, providing events
+ * which represent keys as their corresponding X11 keysym.
+ * 
+ * @constructor
+ * @param {Element} element The Element to use to provide keyboard events.
+ */
+Guacamole.Keyboard = function(element) {
+
+    /**
+     * Reference to this Guacamole.Keyboard.
+     * @private
+     */
+    var guac_keyboard = this;
+
+    /**
+     * Fired whenever the user presses a key with the element associated
+     * with this Guacamole.Keyboard in focus.
+     * 
+     * @event
+     * @param {Number} keysym The keysym of the key being pressed.
+     */
+	this.onkeydown = null;
+
+    /**
+     * Fired whenever the user releases a key with the element associated
+     * with this Guacamole.Keyboard in focus.
+     * 
+     * @event
+     * @param {Number} keysym The keysym of the key being released.
+     */
+	this.onkeyup = null;
+
+    /**
+     * Map of known JavaScript keycodes which do not map to typable characters
+     * to their unshifted X11 keysym equivalents.
+     * @private
+     */
+    var unshiftedKeySym = {
+        8:   0xFF08, // backspace
+        9:   0xFF09, // tab
+        13:  0xFF0D, // enter
+        16:  0xFFE1, // shift
+        17:  0xFFE3, // ctrl
+        18:  0xFFE9, // alt
+        19:  0xFF13, // pause/break
+        20:  0xFFE5, // caps lock
+        27:  0xFF1B, // escape
+        33:  0xFF55, // page up
+        34:  0xFF56, // page down
+        35:  0xFF57, // end
+        36:  0xFF50, // home
+        37:  0xFF51, // left arrow
+        38:  0xFF52, // up arrow
+        39:  0xFF53, // right arrow
+        40:  0xFF54, // down arrow
+        45:  0xFF63, // insert
+        46:  0xFFFF, // delete
+        91:  0xFFEB, // left window key (super_l)
+        92:  0xFF67, // right window key (menu key?)
+        93:  null,   // select key
+        112: 0xFFBE, // f1
+        113: 0xFFBF, // f2
+        114: 0xFFC0, // f3
+        115: 0xFFC1, // f4
+        116: 0xFFC2, // f5
+        117: 0xFFC3, // f6
+        118: 0xFFC4, // f7
+        119: 0xFFC5, // f8
+        120: 0xFFC6, // f9
+        121: 0xFFC7, // f10
+        122: 0xFFC8, // f11
+        123: 0xFFC9, // f12
+        144: 0xFF7F, // num lock
+        145: 0xFF14  // scroll lock
+    };
+
+    /**
+     * Map of known JavaScript keycodes which do not map to typable characters
+     * to their shifted X11 keysym equivalents. Keycodes must only be listed
+     * here if their shifted X11 keysym equivalents differ from their unshifted
+     * equivalents.
+     * @private
+     */
+    var shiftedKeySym = {
+        18:  0xFFE7  // alt
+    };
 
 	// Single key state/modifier buffer
-	var modShift = 0;
+	var modShift = false;
-	var modCtrl = 0;
+	var modCtrl = false;
-	var modAlt = 0;
+	var modAlt = false;
 
     var keydownChar = new Array();
 
-
     // ID of routine repeating keystrokes. -1 = not repeating.
     var repeatKeyTimeoutId = -1;
     var repeatKeyIntervalId = -1;
@@ -91,7 +176,7 @@ function GuacamoleKeyboard(element) {
     function getKeySymFromKeyCode(keyCode) {
 
         var keysym = null;
-		if (modShift == 0) keysym = unshiftedKeySym[keyCode];
+		if (!modShift) keysym = unshiftedKeySym[keyCode];
 		else {
             keysym = shiftedKeySym[keyCode];
             if (keysym == null) keysym = unshiftedKeySym[keyCode];
@@ -104,14 +189,14 @@ function GuacamoleKeyboard(element) {
 
 	// Sends a single keystroke over the network
 	function sendKeyPressed(keysym) {
-		if (keysym != null && keyPressedHandler)
+		if (keysym != null && guac_keyboard.onkeydown)
-			keyPressedHandler(keysym);
+			guac_keyboard.onkeydown(keysym);
 	}
 
 	// Sends a single keystroke over the network
 	function sendKeyReleased(keysym) {
-		if (keysym != null)
+		if (keysym != null && guac_keyboard.onkeyup)
-			keyReleasedHandler(keysym);
+			guac_keyboard.onkeyup(keysym);
 	}
 
 
@@ -125,7 +210,7 @@ function GuacamoleKeyboard(element) {
 	element.onkeydown = function(e) {
 
         // Only intercept if handler set
-        if (!keyPressedHandler) return true;
+        if (!guac_keyboard.onkeydown) return true;
 
 		var keynum;
 		if (window.event) keynum = window.event.keyCode;
@@ -133,11 +218,11 @@ function GuacamoleKeyboard(element) {
 
 		// Ctrl/Alt/Shift
 		if (keynum == 16)
-			modShift = 1;
+			modShift = true;
 		else if (keynum == 17)
-			modCtrl = 1;
+			modCtrl = true;
 		else if (keynum == 18)
-			modAlt = 1;
+			modAlt = true;
 
         var keysym = getKeySymFromKeyCode(keynum);
         if (keysym) {
@@ -146,7 +231,7 @@ function GuacamoleKeyboard(element) {
         }
 
         // If modifier keys are held down, and we have keyIdentifier
-        else if ((modCtrl == 1 || modAlt == 1) && e.keyIdentifier) {
+        else if ((modCtrl || modAlt) && e.keyIdentifier) {
 
             // Get keysym from keyIdentifier
             keysym = getKeySymFromKeyIdentifier(modShift, e.keyIdentifier);
@@ -183,13 +268,15 @@ function GuacamoleKeyboard(element) {
             return false;
         }
 
+        return true;
+
 	};
 
 	// When key pressed
     element.onkeypress = function(e) {
 
         // Only intercept if handler set
-        if (!keyPressedHandler) return true;
+        if (!guac_keyboard.onkeydown) return true;
 
         if (keySymSource != KEYPRESS) return false;
 
@@ -224,7 +311,7 @@ function GuacamoleKeyboard(element) {
 	element.onkeyup = function(e) {
 
         // Only intercept if handler set
-        if (!keyReleasedHandler) return true;
+        if (!guac_keyboard.onkeyup) return true;
 
 		var keynum;
 		if (window.event) keynum = window.event.keyCode;
@@ -232,11 +319,11 @@ function GuacamoleKeyboard(element) {
 		
 		// Ctrl/Alt/Shift
 		if (keynum == 16)
-			modShift = 0;
+			modShift = false;
 		else if (keynum == 17)
-			modCtrl = 0;
+			modCtrl = false;
 		else if (keynum == 18)
-			modAlt = 0;
+			modAlt = false;
         else
             stopRepeat();
 
@@ -253,18 +340,10 @@ function GuacamoleKeyboard(element) {
 	};
 
 	// When focus is lost, clear modifiers.
-	var docOnblur = element.onblur;
 	element.onblur = function() {
-		modAlt = 0;
+		modAlt = false;
-		modCtrl = 0;
+		modCtrl = false;
-		modShift = 0;
+		modShift = false;
-		if (docOnblur != null) docOnblur();
 	};
 
-	var keyPressedHandler = null;
+};
-	var keyReleasedHandler = null;
-
-	this.setKeyPressedHandler = function(kh) { keyPressedHandler = kh; };
-	this.setKeyReleasedHandler = function(kh) { keyReleasedHandler = kh; };
-
-}

guacamole-common-js/src/main/resources/keymap.js

@@ -1,72 +0,0 @@
-
-/*
- *  Guacamole - Clientless Remote Desktop
- *  Copyright (C) 2010  Michael Jumper
- *
- *  This program is free software: you can redistribute it and/or modify
- *  it under the terms of the GNU Affero General Public License as published by
- *  the Free Software Foundation, either version 3 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU Affero General Public License for more details.
- *
- *  You should have received a copy of the GNU Affero General Public License
- *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-
-// Keymap
-
-var unshiftedKeySym = new Array();
-unshiftedKeySym[8]   = 0xFF08; // backspace
-unshiftedKeySym[9]   = 0xFF09; // tab
-unshiftedKeySym[13]  = 0xFF0D; // enter
-unshiftedKeySym[16]  = 0xFFE1; // shift
-unshiftedKeySym[17]  = 0xFFE3; // ctrl
-unshiftedKeySym[18]  = 0xFFE9; // alt
-unshiftedKeySym[19]  = 0xFF13; // pause/break
-unshiftedKeySym[20]  = 0xFFE5; // caps lock
-unshiftedKeySym[27]  = 0xFF1B; // escape
-unshiftedKeySym[33]  = 0xFF55; // page up
-unshiftedKeySym[34]  = 0xFF56; // page down
-unshiftedKeySym[35]  = 0xFF57; // end
-unshiftedKeySym[36]  = 0xFF50; // home
-unshiftedKeySym[37]  = 0xFF51; // left arrow
-unshiftedKeySym[38]  = 0xFF52; // up arrow
-unshiftedKeySym[39]  = 0xFF53; // right arrow
-unshiftedKeySym[40]  = 0xFF54; // down arrow
-unshiftedKeySym[45]  = 0xFF63; // insert
-unshiftedKeySym[46]  = 0xFFFF; // delete
-unshiftedKeySym[91]  = 0xFFEB; // left window key (super_l)
-unshiftedKeySym[92]  = 0xFF67; // right window key (menu key?)
-unshiftedKeySym[93]  = null; // select key
-unshiftedKeySym[112] = 0xFFBE; // f1
-unshiftedKeySym[113] = 0xFFBF; // f2
-unshiftedKeySym[114] = 0xFFC0; // f3
-unshiftedKeySym[115] = 0xFFC1; // f4
-unshiftedKeySym[116] = 0xFFC2; // f5
-unshiftedKeySym[117] = 0xFFC3; // f6
-unshiftedKeySym[118] = 0xFFC4; // f7
-unshiftedKeySym[119] = 0xFFC5; // f8
-unshiftedKeySym[120] = 0xFFC6; // f9
-unshiftedKeySym[121] = 0xFFC7; // f10
-unshiftedKeySym[122] = 0xFFC8; // f11
-unshiftedKeySym[123] = 0xFFC9; // f12
-unshiftedKeySym[144] = 0xFF7F; // num lock
-unshiftedKeySym[145] = 0xFF14; // scroll lock
-
-// Shifted versions, IF DIFFERENT FROM UNSHIFTED!
-// If any of these are null, the unshifted one will be used.
-var shiftedKeySym  = new Array();
-shiftedKeySym[18]  = 0xFFE7; // alt
-
-// Constants for keysyms for special keys
-var KEYSYM_CTRL = 65507;
-var KEYSYM_ALT = 65513;
-var KEYSYM_DELETE = 65535;
-var KEYSYM_SHIFT = 65505;
-
-

guacamole-common-js/src/main/resources/layer.js

@@ -17,29 +17,136 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-function Layer(width, height) {
+// Guacamole namespace
+var Guacamole = Guacamole || {};
 
-    // Off-screen buffer
+/**
+ * Abstract ordered drawing surface. Each Layer contains a canvas element and
+ * provides simple drawing instructions for drawing to that canvas element,
+ * however unlike the canvas element itself, drawing operations on a Layer are
+ * guaranteed to run in order, even if such an operation must wait for an image
+ * to load before completing.
+ * 
+ * @constructor
+ * 
+ * @param {Number} width The width of the Layer, in pixels. The canvas element
+ *                       backing this Layer will be given this width.
+ *                       
+ * @param {Number} height The height of the Layer, in pixels. The canvas element
+ *                        backing this Layer will be given this height.
+ */
+Guacamole.Layer = function(width, height) {
+
+    /**
+     * Reference to this Layer.
+     * @private
+     */
+    var layer = this;
+
+    /**
+     * The canvas element backing this Layer.
+     * @private
+     */
     var display = document.createElement("canvas");
+
+    /**
+     * The 2D display context of the canvas element backing this Layer.
+     * @private
+     */
     var displayContext = display.getContext("2d");
+    displayContext.save();
 
+    /**
+     * The queue of all pending Tasks. Tasks will be run in order, with new
+     * tasks added at the end of the queue and old tasks removed from the
+     * front of the queue (FIFO).
+     * @private
+     */
+    var tasks = new Array();
+
+    /**
+     * Map of all Guacamole channel masks to HTML5 canvas composite operation
+     * names. Not all channel mask combinations are currently implemented.
+     * @private
+     */
+    var compositeOperation = {
+     /* 0x0 NOT IMPLEMENTED */
+        0x1: "destination-in",
+        0x2: "destination-out",
+     /* 0x3 NOT IMPLEMENTED */
+        0x4: "source-in",
+     /* 0x5 NOT IMPLEMENTED */
+        0x6: "source-atop",
+     /* 0x7 NOT IMPLEMENTED */
+        0x8: "source-out",
+        0x9: "destination-atop",
+        0xA: "xor",
+        0xB: "destination-over",
+        0xC: "copy",
+     /* 0xD NOT IMPLEMENTED */
+        0xE: "source-over",
+        0xF: "lighter"
+    };
+
+    /**
+     * Resizes the canvas element backing this Layer without testing the
+     * new size. This function should only be used internally.
+     * 
+     * @private
+     * @param {Number} newWidth The new width to assign to this Layer.
+     * @param {Number} newHeight The new height to assign to this Layer.
+     */
     function resize(newWidth, newHeight) {
-        display.style.position = "absolute";
-        display.style.left = "0px";
-        display.style.top = "0px";
 
+
+        // Only preserve old data if width/height are both non-zero
+        var oldData = null;
+        if (width != 0 && height != 0) {
+
+            // Create canvas and context for holding old data
+            oldData = document.createElement("canvas");
+            oldData.width = width;
+            oldData.height = height;
+
+            var oldDataContext = oldData.getContext("2d");
+
+            // Copy image data from current
+            oldDataContext.drawImage(display,
+                    0, 0, width, height,
+                    0, 0, width, height);
+
+        }
+
+        // Resize canvas
         display.width = newWidth;
         display.height = newHeight;
 
+        // Redraw old data, if any
+        if (oldData)
+            displayContext.drawImage(oldData, 
+                    0, 0, width, height,
+                    0, 0, width, height);
+
         width = newWidth;
         height = newHeight;
     }
 
-    display.resize = function(newWidth, newHeight) {
+    /**
-        if (newWidth != width || newHeight != height)
+     * Given the X and Y coordinates of the upper-left corner of a rectangle
-            resize(newWidth, newHeight);
+     * and the rectangle's width and height, resize the backing canvas element
-    };
+     * as necessary to ensure that the rectangle fits within the canvas
-
+     * element's coordinate space. This function will only make the canvas
+     * larger. If the rectangle already fits within the canvas element's
+     * coordinate space, the canvas is left unchanged.
+     * 
+     * @private
+     * @param {Number} x The X coordinate of the upper-left corner of the
+     *                   rectangle to fit.
+     * @param {Number} y The Y coordinate of the upper-left corner of the
+     *                   rectangle to fit.
+     * @param {Number} w The width of the the rectangle to fit.
+     * @param {Number} h The height of the the rectangle to fit.
+     */
     function fitRect(x, y, w, h) {
         
         // Calculate bounds
@@ -66,176 +173,345 @@ function Layer(width, height) {
 
     }
 
-    resize(width, height);
+    /**
+     * A container for an task handler. Each operation which must be ordered
+     * is associated with a Task that goes into a task queue. Tasks in this
+     * queue are executed in order once their handlers are set, while Tasks 
+     * without handlers block themselves and any following Tasks from running.
+     *
+     * @constructor
+     * @private
+     * @param {function} taskHandler The function to call when this task 
+     *                               runs, if any.
+     */
+    function Task(taskHandler) {
         
-    var readyHandler = null;
+        /**
-    var updates = new Array();
+         * The handler this Task is associated with, if any.
-    var autosize = 0;
+         * 
-
+         * @type function
-    function Update(updateHandler) {
+         */
-
+        this.handler = taskHandler;
-        this.setHandler = function(handler) {
-            updateHandler = handler;
-        };
-
-        this.hasHandler = function() {
-            return updateHandler != null;
-        };
-
-        this.handle = function() {
-            updateHandler();
-        }
         
     }
 
-    display.setAutosize = function(flag) {
+    /**
-        autosize = flag;
+     * If no tasks are pending or running, run the provided handler immediately,
-    };
+     * if any. Otherwise, schedule a task to run immediately after all currently
+     * running or pending tasks are complete.
+     * 
+     * @private
+     * @param {function} handler The function to call when possible, if any.
+     * @returns {Task} The Task created and added to the queue for future
+     *                 running, if any, or null if the handler was run
+     *                 immediately and no Task needed to be created.
+     */
+    function scheduleTask(handler) {
         
-    function reserveJob(handler) {
+        // If no pending tasks, just call (if available) and exit
-        
+        if (layer.isReady() && handler != null) {
-        // If no pending updates, just call (if available) and exit
-        if (display.isReady() && handler != null) {
             handler();
             return null;
         }
 
-        // If updates are pending/executing, schedule a pending update
+        // If tasks are pending/executing, schedule a pending task
         // and return a reference to it.
-        var update = new Update(handler);
+        var task = new Task(handler);
-        updates.push(update);
+        tasks.push(task);
-        return update;
+        return task;
         
     }
 
-    function handlePendingUpdates() {
+    var tasksInProgress = false;
 
-        // Draw all pending updates.
+    /**
-        var update;
+     * Run any Tasks which were pending but are now ready to run and are not
-        while ((update = updates[0]) != null && update.hasHandler()) {
+     * blocked by other Tasks.
-            update.handle();
+     * @private
-            updates.shift();
+     */
+    function handlePendingTasks() {
+
+        if (tasksInProgress)
+            return;
+
+        tasksInProgress = true;
+
+        // Draw all pending tasks.
+        var task;
+        while ((task = tasks[0]) != null && task.handler) {
+            tasks.shift();
+            task.handler();
         }
 
-        // If done with updates, call ready handler
+        tasksInProgress = false;
-        if (display.isReady() && readyHandler != null)
-            readyHandler();
 
     }
 
-    display.isReady = function() {
+    /**
-        return updates.length == 0;
+     * Set to true if this Layer should resize itself to accomodate the
+     * dimensions of any drawing operation, and false (the default) otherwise.
+     * 
+     * Note that setting this property takes effect immediately, and thus may
+     * take effect on operations that were started in the past but have not
+     * yet completed. If you wish the setting of this flag to only modify
+     * future operations, you will need to make the setting of this flag an
+     * operation with sync().
+     * 
+     * @example
+     * // Set autosize to true for all future operations
+     * layer.sync(function() {
+     *     layer.autosize = true;
+     * });
+     * 
+     * @type Boolean
+     * @default false
+     */
+    this.autosize = false;
+
+    /**
+     * Returns the canvas element backing this Layer.
+     * @returns {Element} The canvas element backing this Layer.
+     */
+    this.getCanvas = function() {
+        return display;
     };
 
-    display.setReadyHandler = function(handler) {
+    /**
-        readyHandler = handler;
+     * Returns whether this Layer is ready. A Layer is ready if it has no
+     * pending operations and no operations in-progress.
+     * 
+     * @returns {Boolean} true if this Layer is ready, false otherwise.
+     */
+    this.isReady = function() {
+        return tasks.length == 0;
     };
 
+    /**
+     * Changes the size of this Layer to the given width and height. Resizing
+     * is only attempted if the new size provided is actually different from
+     * the current size.
+     * 
+     * @param {Number} newWidth The new width to assign to this Layer.
+     * @param {Number} newHeight The new height to assign to this Layer.
+     */
+    this.resize = function(newWidth, newHeight) {
+        scheduleTask(function() {
+            if (newWidth != width || newHeight != height)
+                resize(newWidth, newHeight);
+        });
+    };
 
-    display.drawImage = function(x, y, image) {
+    /**
-        reserveJob(function() {
+     * Draws the specified image at the given coordinates. The image specified
-            if (autosize != 0) fitRect(x, y, image.width, image.height);
+     * must already be loaded.
+     * 
+     * @param {Number} x The destination X coordinate.
+     * @param {Number} y The destination Y coordinate.
+     * @param {Image} image The image to draw. Note that this is an Image
+     *                      object - not a URL.
+     */
+    this.drawImage = function(x, y, image) {
+        scheduleTask(function() {
+            if (layer.autosize != 0) fitRect(x, y, image.width, image.height);
             displayContext.drawImage(image, x, y);
         });
     };
 
-
+    /**
-    display.draw = function(x, y, url) {
+     * Draws the image at the specified URL at the given coordinates. The image
-        var update = reserveJob(null);
+     * will be loaded automatically, and this and any future operations will
+     * wait for the image to finish loading.
+     * 
+     * @param {Number} x The destination X coordinate.
+     * @param {Number} y The destination Y coordinate.
+     * @param {String} url The URL of the image to draw.
+     */
+    this.draw = function(x, y, url) {
+        var task = scheduleTask(null);
 
         var image = new Image();
         image.onload = function() {
 
-            update.setHandler(function() {
+            task.handler = function() {
-                if (autosize != 0) fitRect(x, y, image.width, image.height);
+                if (layer.autosize != 0) fitRect(x, y, image.width, image.height);
                 displayContext.drawImage(image, x, y);
-            });
+            };
 
-            // As this update originally had no handler and may have blocked
+            // As this task originally had no handler and may have blocked
-            // other updates, handle any blocked updates.
+            // other tasks, handle any blocked tasks.
-            handlePendingUpdates();
+            handlePendingTasks();
 
         };
         image.src = url;
 
     };
 
-    // Run arbitrary function as soon as currently pending operations complete.
+    /**
-    // Future operations will not block this function from being called (unlike
+     * Run an arbitrary function as soon as currently pending operations
-    // the ready handler, which requires no pending updates)
+     * are complete.
-    display.sync = function(handler) {
+     * 
-        reserveJob(handler);
+     * @param {function} handler The function to call once all currently
-    }
+     *                           pending operations are complete.
+     */
+    this.sync = function(handler) {
+        scheduleTask(handler);
+    };
 
-    display.copyRect = function(srcLayer, srcx, srcy, w, h, x, y) {
+    /**
+     * Copy a rectangle of image data from one Layer to this Layer. This
+     * operation will copy exactly the image data that will be drawn once all
+     * operations of the source Layer that were pending at the time this
+     * function was called are complete. This operation will not alter the
+     * size of the source Layer even if its autosize property is set to true.
+     * 
+     * @param {Guacamole.Layer} srcLayer The Layer to copy image data from.
+     * @param {Number} srcx The X coordinate of the upper-left corner of the
+     *                      rectangle within the source Layer's coordinate
+     *                      space to copy data from.
+     * @param {Number} srcy The Y coordinate of the upper-left corner of the
+     *                      rectangle within the source Layer's coordinate
+     *                      space to copy data from.
+     * @param {Number} srcw The width of the rectangle within the source Layer's
+     *                      coordinate space to copy data from.
+     * @param {Number} srch The height of the rectangle within the source
+     *                      Layer's coordinate space to copy data from.
+     * @param {Number} x The destination X coordinate.
+     * @param {Number} y The destination Y coordinate.
+     */
+    this.copyRect = function(srcLayer, srcx, srcy, srcw, srch, x, y) {
 
         function doCopyRect() {
-            if (autosize != 0) fitRect(x, y, w, h);
+            if (layer.autosize != 0) fitRect(x, y, srcw, srch);
-            displayContext.drawImage(srcLayer, srcx, srcy, w, h, x, y, w, h);
+            displayContext.drawImage(srcLayer.getCanvas(), srcx, srcy, srcw, srch, x, y, srcw, srch);
         }
 
         // If we ARE the source layer, no need to sync.
         // Syncing would result in deadlock.
-        if (display === srcLayer)
+        if (layer === srcLayer)
-            reserveJob(doCopyRect);
+            scheduleTask(doCopyRect);
 
         // Otherwise synchronize copy operation with source layer
         else {
-            var update = reserveJob(null);
+            var task = scheduleTask(null);
             srcLayer.sync(function() {
                 
-                update.setHandler(doCopyRect);
+                task.handler = doCopyRect;
 
-                // As this update originally had no handler and may have blocked
+                // As this task originally had no handler and may have blocked
-                // other updates, handle any blocked updates.
+                // other tasks, handle any blocked tasks.
-                handlePendingUpdates();
+                handlePendingTasks();
 
             });
         }
 
     };
 
-    display.clearRect = function(x, y, w, h) {
+    /**
-        reserveJob(function() {
+     * Clear the specified rectangle of image data.
-            if (autosize != 0) fitRect(x, y, w, h);
+     * 
+     * @param {Number} x The X coordinate of the upper-left corner of the
+     *                   rectangle to clear.
+     * @param {Number} y The Y coordinate of the upper-left corner of the
+     *                   rectangle to clear.
+     * @param {Number} w The width of the rectangle to clear.
+     * @param {Number} h The height of the rectangle to clear.
+     */
+    this.clearRect = function(x, y, w, h) {
+        scheduleTask(function() {
+            if (layer.autosize != 0) fitRect(x, y, w, h);
             displayContext.clearRect(x, y, w, h);
         });
     };
 
-    display.filter = function(filter) {
+    /**
-        reserveJob(function() {
+     * Fill the specified rectangle of image data with the specified color.
+     * 
+     * @param {Number} x The X coordinate of the upper-left corner of the
+     *                   rectangle to draw.
+     * @param {Number} y The Y coordinate of the upper-left corner of the
+     *                   rectangle to draw.
+     * @param {Number} w The width of the rectangle to draw.
+     * @param {Number} h The height of the rectangle to draw.
+     * @param {Number} r The red component of the color of the rectangle.
+     * @param {Number} g The green component of the color of the rectangle.
+     * @param {Number} b The blue component of the color of the rectangle.
+     * @param {Number} a The alpha component of the color of the rectangle.
+     */
+    this.drawRect = function(x, y, w, h, r, g, b, a) {
+        scheduleTask(function() {
+            if (layer.autosize != 0) fitRect(x, y, w, h);
+            displayContext.fillStyle = "rgba("
+                        + r + "," + g + "," + b + "," + a / 255 + ")";
+            displayContext.fillRect(x, y, w, h);
+        });
+    };
+
+    /**
+     * Clip all future drawing operations by the specified rectangle.
+     * 
+     * @param {Number} x The X coordinate of the upper-left corner of the
+     *                   rectangle to use for the clipping region.
+     * @param {Number} y The Y coordinate of the upper-left corner of the
+     *                   rectangle to use for the clipping region.
+     * @param {Number} w The width of the rectangle to use for the clipping region.
+     * @param {Number} h The height of the rectangle to use for the clipping region.
+     */
+    this.clipRect = function(x, y, w, h) {
+        scheduleTask(function() {
+
+            // Clear any current clipping region
+            displayContext.restore();
+            displayContext.save();
+
+            if (layer.autosize != 0) fitRect(x, y, w, h);
+
+            // Set new clipping region
+            displayContext.beginPath();
+            displayContext.rect(x, y, w, h);
+            displayContext.clip();
+
+        });
+    };
+
+    /**
+     * Provides the given filtering function with a writable snapshot of
+     * image data and the current width and height of the Layer.
+     * 
+     * @param {function} filter A function which accepts an array of image
+     *                          data (as returned by the canvas element's
+     *                          display context's getImageData() function),
+     *                          the width of the Layer, and the height of the
+     *                          Layer as parameters, in that order. This
+     *                          function must accomplish its filtering by
+     *                          modifying the given image data array directly.
+     */
+    this.filter = function(filter) {
+        scheduleTask(function() {
             var imageData = displayContext.getImageData(0, 0, width, height);
             filter(imageData.data, width, height);
             displayContext.putImageData(imageData, 0, 0);
         });
     };
 
-    var compositeOperation = {
+    /**
-     /* 0x0 NOT IMPLEMENTED */
+     * Sets the channel mask for future operations on this Layer. The channel
-        0x1: "destination-in",
+     * mask is a Guacamole-specific compositing operation identifier with a
-        0x2: "destination-out",
+     * single bit representing each of four channels (in order): source image
-     /* 0x3 NOT IMPLEMENTED */
+     * where destination transparent, source where destination opaque,
-        0x4: "source-in",
+     * destination where source transparent, and destination where source
-     /* 0x5 NOT IMPLEMENTED */
+     * opaque.
-        0x6: "source-atop",
+     * 
-     /* 0x7 NOT IMPLEMENTED */
+     * @param {Number} mask The channel mask for future operations on this
-        0x8: "source-out",
+     *                      Layer.
-        0x9: "destination-atop",
+     */
-        0xA: "xor",
+    this.setChannelMask = function(mask) {
-        0xB: "destination-over",
+        scheduleTask(function() {
-        0xC: "copy",
-     /* 0xD NOT IMPLEMENTED */
-        0xE: "source-over",
-        0xF: "lighter",
-    };
-
-    display.setChannelMask = function(mask) {
-        reserveJob(function() {
             displayContext.globalCompositeOperation = compositeOperation[mask];
         });
     };
 
-    return display;
+    // Initialize canvas dimensions
-
+    display.width = width;
-}
+    display.height = height;
 
+};

guacamole-common-js/src/main/resources/mouse.js

@@ -17,60 +17,93 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+// Guacamole namespace
+var Guacamole = Guacamole || {};
 
-function GuacamoleMouse(element) {
+/**
+ * Provides cross-browser mouse events for a given element. The events of
+ * the given element are automatically populated with handlers that translate
+ * mouse events into a non-browser-specific event provided by the
+ * Guacamole.Mouse instance.
+ * 
+ * Touch event support is planned, but currently only in testing (translate
+ * touch events into mouse events).
+ * 
+ * @constructor
+ * @param {Element} element The Element to use to provide mouse events.
+ */
+Guacamole.Mouse = function(element) {
 
-	/*****************************************/
+    /**
-	/*** Mouse Handler                     ***/
+     * Reference to this Guacamole.Mouse.
-	/*****************************************/
+     * @private
+     */
+    var guac_mouse = this;
 
+    /**
+     * The current mouse state. The properties of this state are updated when
+     * mouse events fire. This state object is also passed in as a parameter to
+     * the handler of any mouse events.
+     * 
+     * @type Guacamole.Mouse.State
+     */
+    this.currentState = new Guacamole.Mouse.State(
+        0, 0, 
+        false, false, false, false, false
+    );
 
-    var mouseIndex = 0;
+    /**
+     * Fired whenever the user presses a mouse button down over the element
+     * associated with this Guacamole.Mouse.
+     * 
+     * @event
+     * @param {Guacamole.Mouse.State} state The current mouse state.
+     */
+	this.onmousedown = null;
 
-    var mouseLeftButton   = 0;
+    /**
-    var mouseMiddleButton = 0;
+     * Fired whenever the user releases a mouse button down over the element
-    var mouseRightButton  = 0;
+     * associated with this Guacamole.Mouse.
-
+     * 
-    var mouseX = 0;
+     * @event
-    var mouseY = 0;
+     * @param {Guacamole.Mouse.State} state The current mouse state.
-
+     */
-    var absoluteMouseX = 0;
+	this.onmouseup = null;
-    var absoluteMouseY = 0;
-
-
-    function getMouseState(up, down) {
-        var mouseState = new MouseEvent(mouseX, mouseY,
-                mouseLeftButton, mouseMiddleButton, mouseRightButton, up, down);
-
-        return mouseState;
-    }
 
+    /**
+     * Fired whenever the user moves the mouse over the element associated with
+     * this Guacamole.Mouse.
+     * 
+     * @event
+     * @param {Guacamole.Mouse.State} state The current mouse state.
+     */
+	this.onmousemove = null;
 
     function moveMouse(pageX, pageY) {
 
-        absoluteMouseX = pageX;
+        guac_mouse.currentState.x = pageX - element.offsetLeft;
-        absoluteMouseY = pageY;
+        guac_mouse.currentState.y = pageY - element.offsetTop;
-
-        mouseX = absoluteMouseX - element.offsetLeft;
-        mouseY = absoluteMouseY - element.offsetTop;
 
         // This is all JUST so we can get the mouse position within the element
         var parent = element.offsetParent;
         while (parent) {
             if (parent.offsetLeft && parent.offsetTop) {
-                mouseX -= parent.offsetLeft;
+                guac_mouse.currentState.x -= parent.offsetLeft;
-                mouseY -= parent.offsetTop;
+                guac_mouse.currentState.y -= parent.offsetTop;
             }
             parent = parent.offsetParent;
         }
 
-        movementHandler(getMouseState(0, 0));
+        if (guac_mouse.onmousemove)
+            guac_mouse.onmousemove(guac_mouse.currentState);
 
     }
 
 
     // Block context menu so right-click gets sent properly
-    element.oncontextmenu = function(e) {return false;};
+    element.oncontextmenu = function(e) {
+        return false;
+    };
 
     element.onmousemove = function(e) {
 
@@ -136,17 +169,19 @@ function GuacamoleMouse(element) {
 
         switch (e.button) {
             case 0:
-                mouseLeftButton = 1;
+                guac_mouse.currentState.left = true;
                 break;
             case 1:
-                mouseMiddleButton = 1;
+                guac_mouse.currentState.middle = true;
                 break;
             case 2:
-                mouseRightButton = 1;
+                guac_mouse.currentState.right = true;
                 break;
         }
 
-        buttonPressedHandler(getMouseState(0, 0));
+        if (guac_mouse.onmousedown)
+            guac_mouse.onmousedown(guac_mouse.currentState);
+
     };
 
 
@@ -156,17 +191,19 @@ function GuacamoleMouse(element) {
 
         switch (e.button) {
             case 0:
-                mouseLeftButton = 0;
+                guac_mouse.currentState.left = false;
                 break;
             case 1:
-                mouseMiddleButton = 0;
+                guac_mouse.currentState.middle = false;
                 break;
             case 2:
-                mouseRightButton = 0;
+                guac_mouse.currentState.right = false;
                 break;
         }
 
-        buttonReleasedHandler(getMouseState(0, 0));
+        if (guac_mouse.onmouseup)
+            guac_mouse.onmouseup(guac_mouse.currentState);
+
     };
 
     element.onmouseout = function(e) {
@@ -174,12 +211,16 @@ function GuacamoleMouse(element) {
         e.stopPropagation();
 
         // Release all buttons
-        if (mouseLeftButton || mouseMiddleButton || mouseRightButton) {
+        if (guac_mouse.currentState.left
-            mouseLeftButton = 0;
+            || guac_mouse.currentState.middle
-            mouseMiddleButton = 0;
+            || guac_mouse.currentState.right) {
-            mouseRightButton = 0;
 
-            buttonReleasedHandler(getMouseState(0, 0));
+            guac_mouse.currentState.left = false;
+            guac_mouse.currentState.middle = false;
+            guac_mouse.currentState.right = false;
+
+            if (guac_mouse.onmouseup)
+                guac_mouse.onmouseup(guac_mouse.currentState);
         }
 
     };
@@ -200,14 +241,28 @@ function GuacamoleMouse(element) {
 
         // Up
         if (delta < 0) {
-            buttonPressedHandler(getMouseState(1, 0));
+            if (guac_mouse.onmousedown) {
-            buttonReleasedHandler(getMouseState(0, 0));
+                guac_mouse.currentState.up = true;
+                guac_mouse.onmousedown(guac_mouse.currentState);
+            }
+
+            if (guac_mouse.onmouseup) {
+                guac_mouse.currentState.up = false;
+                guac_mouse.onmouseup(guac_mouse.currentState);
+            }
         }
 
         // Down
         if (delta > 0) {
-            buttonPressedHandler(getMouseState(0, 1));
+            if (guac_mouse.onmousedown) {
-            buttonReleasedHandler(getMouseState(0, 0));
+                guac_mouse.currentState.down = true;
+                guac_mouse.onmousedown(guac_mouse.currentState);
+            }
+
+            if (guac_mouse.onmouseup) {
+                guac_mouse.currentState.down = false;
+                guac_mouse.onmouseup(guac_mouse.currentState);
+            }
         }
 
         if (e.preventDefault)
@@ -220,53 +275,71 @@ function GuacamoleMouse(element) {
 
     element.onmousewheel = function(e) {
         handleScroll(e);
-    }
-
-	var buttonPressedHandler = null;
-	var buttonReleasedHandler = null;
-	var movementHandler = null;
-
-	this.setButtonPressedHandler  = function(mh) {buttonPressedHandler = mh;};
-	this.setButtonReleasedHandler = function(mh) {buttonReleasedHandler = mh;};
-	this.setMovementHandler = function(mh) {movementHandler = mh;};
-
-
-    this.getX = function() {return mouseX;};
-    this.getY = function() {return mouseY;};
-    this.getLeftButton = function() {return mouseLeftButton;};
-    this.getMiddleButton = function() {return mouseMiddleButton;};
-    this.getRightButton = function() {return mouseRightButton;};
-
-}
-
-function MouseEvent(x, y, left, middle, right, up, down) {
-
-    this.getX = function() {
-        return x;
     };
 
-    this.getY = function() {
+};
-        return y;
-    };
 
-    this.getLeft = function() {
+/**
-        return left;
+ * Simple container for properties describing the state of a mouse.
-    };
+ * 
+ * @constructor
+ * @param {Number} x The X position of the mouse pointer in pixels.
+ * @param {Number} y The Y position of the mouse pointer in pixels.
+ * @param {Boolean} left Whether the left mouse button is pressed. 
+ * @param {Boolean} middle Whether the middle mouse button is pressed. 
+ * @param {Boolean} right Whether the right mouse button is pressed. 
+ * @param {Boolean} up Whether the up mouse button is pressed (the fourth
+ *                     button, usually part of a scroll wheel). 
+ * @param {Boolean} down Whether the down mouse button is pressed (the fifth
+ *                       button, usually part of a scroll wheel). 
+ */
+Guacamole.Mouse.State = function(x, y, left, middle, right, up, down) {
 
-    this.getMiddle = function() {
+    /**
-        return middle;
+     * The current X position of the mouse pointer.
-    };
+     * @type Number
+     */
+    this.x = x;
 
-    this.getRight = function() {
+    /**
-        return right;
+     * The current Y position of the mouse pointer.
-    };
+     * @type Number
+     */
+    this.y = y;
 
-    this.getUp = function() {
+    /**
-        return up;
+     * Whether the left mouse button is currently pressed.
-    };
+     * @type Boolean
+     */
+    this.left = left;
 
-    this.getDown = function() {
+    /**
-        return down;
+     * Whether the middle mouse button is currently pressed.
-    };
+     * @type Boolean
+     */
+    this.middle = middle
+
+    /**
+     * Whether the right mouse button is currently pressed.
+     * @type Boolean
+     */
+    this.right = right;
+
+    /**
+     * Whether the up mouse button is currently pressed. This is the fourth
+     * mouse button, associated with upward scrolling of the mouse scroll
+     * wheel.
+     * @type Boolean
+     */
+    this.up = up;
+
+    /**
+     * Whether the down mouse button is currently pressed. This is the fifth 
+     * mouse button, associated with downward scrolling of the mouse scroll
+     * wheel.
+     * @type Boolean
+     */
+    this.down = down;
+    
+};
 
-}

guacamole-common-js/src/main/resources/oskeyboard.js

@@ -17,10 +17,19 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+// Guacamole namespace
+var Guacamole = Guacamole || {};
 
-function GuacamoleOnScreenKeyboard(url) {
+/**
+ * Dynamic on-screen keyboard. Given the URL to an XML keyboard layout file,
+ * this object will download and use the XML to construct a clickable on-screen
+ * keyboard with its own key events.
+ * 
+ * @constructor
+ * @param {String} url The URL of an XML keyboard layout file.
+ */
+Guacamole.OnScreenKeyboard = function(url) {
 
-    var tabIndex = 1;
     var allKeys = new Array();
     var modifierState = new function() {};
 

guacamole-common-js/src/main/resources/tunnel.js

@@ -16,7 +16,77 @@
  *  You should have received a copy of the GNU Affero General Public License
  */
 
-function GuacamoleHTTPTunnel(tunnelURL) {
+// Guacamole namespace
+var Guacamole = Guacamole || {};
+
+/**
+ * Core object providing abstract communication for Guacamole. This object
+ * is a null implementation whose functions do nothing. Guacamole applications
+ * should use {@link Guacamole.HTTPTunnel} instead, or implement their own tunnel based
+ * on this one.
+ * 
+ * @constructor
+ * @see Guacamole.HTTPTunnel
+ */
+Guacamole.Tunnel = function() {
+
+    /**
+     * Connect to the tunnel with the given optional data. This data is
+     * typically used for authentication. The format of data accepted is
+     * up to the tunnel implementation.
+     * 
+     * @param {String} data The data to send to the tunnel when connecting.
+     */
+    this.connect = function(data) {};
+    
+    /**
+     * Disconnect from the tunnel.
+     */
+    this.disconnect = function() {};
+    
+    /**
+     * Send the given message through the tunnel to the service on the other
+     * side. All messages are guaranteed to be received in the order sent.
+     * 
+     * @param {String} message The message to send to the service on the other
+     *                         side of the tunnel.
+     */
+    this.sendMessage = function(message) {};
+    
+    /**
+     * Fired whenever an error is encountered by the tunnel.
+     * 
+     * @event
+     * @param {String} message A human-readable description of the error that
+     *                         occurred.
+     */
+    this.onerror = null;
+
+    /**
+     * Fired once for every complete Guacamole instruction received, in order.
+     * 
+     * @event
+     * @param {String} opcode The Guacamole instruction opcode.
+     * @param {Array} parameters The parameters provided for the instruction,
+     *                           if any.
+     */
+    this.oninstruction = null;
+
+};
+
+/**
+ * Guacamole Tunnel implemented over HTTP via XMLHttpRequest.
+ * 
+ * @constructor
+ * @augments Guacamole.Tunnel
+ * @param {String} tunnelURL The URL of the HTTP tunneling service.
+ */
+Guacamole.HTTPTunnel = function(tunnelURL) {
+
+    /**
+     * Reference to this HTTP tunnel.
+     */
+    var tunnel = this;
 
     var tunnel_uuid;
 
@@ -36,12 +106,10 @@ function GuacamoleHTTPTunnel(tunnelURL) {
     // Default to polling - will be turned off automatically if not needed
     var pollingMode = POLLING_ENABLED;
 
-    var instructionHandler = null;
+    var sendingMessages = false;
-
-    var sendingMessages = 0;
     var outputMessageBuffer = "";
 
-    function sendMessage(message) {
+    this.sendMessage = function(message) {
 
         // Do not attempt to send messages if not connected
         if (currentState != STATE_CONNECTED)
@@ -49,16 +117,16 @@ function GuacamoleHTTPTunnel(tunnelURL) {
 
         // Add event to queue, restart send loop if finished.
         outputMessageBuffer += message;
-        if (sendingMessages == 0)
+        if (!sendingMessages)
             sendPendingMessages();
 
-    }
+    };
 
     function sendPendingMessages() {
 
         if (outputMessageBuffer.length > 0) {
 
-            sendingMessages = 1;
+            sendingMessages = true;
 
             var message_xmlhttprequest = new XMLHttpRequest();
             message_xmlhttprequest.open("POST", TUNNEL_WRITE + tunnel_uuid);
@@ -75,7 +143,7 @@ function GuacamoleHTTPTunnel(tunnelURL) {
 
         }
         else
-            sendingMessages = 0;
+            sendingMessages = false;
 
     }
 
@@ -101,8 +169,8 @@ function GuacamoleHTTPTunnel(tunnelURL) {
                 return;
             }
 
-            // Start next request as soon as possible
+            // Start next request as soon as possible IF request was successful
-            if (xmlhttprequest.readyState >= 2 && nextRequest == null)
+            if (xmlhttprequest.readyState >= 2 && nextRequest == null && xmlhttprequest.status == 200)
                 nextRequest = makeRequest();
 
             // Parse stream when data is received and when complete.
@@ -117,9 +185,25 @@ function GuacamoleHTTPTunnel(tunnelURL) {
                         clearInterval(interval);
                 }
 
+                // If canceled, stop transfer
+                if (xmlhttprequest.status == 0) {
+                    tunnel.disconnect();
+                    return;
+                }
+
                 // Halt on error during request
-                if (xmlhttprequest.status == 0 || xmlhttprequest.status != 200) {
+                else if (xmlhttprequest.status != 200) {
-                    disconnect();
+
+                    // Get error message (if any)
+                    var message = xmlhttprequest.getResponseHeader("X-Guacamole-Error-Message");
+                    if (!message)
+                        message = "Internal server error";
+
+                    // Call error handler
+                    if (tunnel.onerror) tunnel.onerror(message);
+
+                    // Finish
+                    tunnel.disconnect();
                     return;
                 }
 
@@ -160,8 +244,8 @@ function GuacamoleHTTPTunnel(tunnelURL) {
                     }
 
                     // Call instruction handler.
-                    if (instructionHandler != null)
+                    if (tunnel.oninstruction != null)
-                        instructionHandler(opcode, parameters);
+                        tunnel.oninstruction(opcode, parameters);
                 }
 
                 // Start search at end of string.
@@ -213,7 +297,7 @@ function GuacamoleHTTPTunnel(tunnelURL) {
 
     }
 
-    function connect(data) {
+    this.connect = function(data) {
 
         // Start tunnel and connect synchronously
         var connect_xmlhttprequest = new XMLHttpRequest();
@@ -239,18 +323,12 @@ function GuacamoleHTTPTunnel(tunnelURL) {
         currentState = STATE_CONNECTED;
         handleResponse(makeRequest());
 
-    }
-
-    function disconnect() {
-        currentState = STATE_DISCONNECTED;
-    }
-
-    // External API
-    this.connect = connect;
-    this.disconnect = disconnect;
-    this.sendMessage = sendMessage;
-    this.setInstructionHandler = function(handler) {
-        instructionHandler = handler;
     };
 
-}
+    this.disconnect = function() {
+        currentState = STATE_DISCONNECTED;
+    };
+
+};
+
+Guacamole.HTTPTunnel.prototype = new Guacamole.Tunnel();