* Change name of ext_desktop_size to the proper ExtendedDesktopSize

* Added better error handling in ExtendedDesktopSize
* Added helper function to share code with DesktopSize
* Update test.rfb.js to only check for error handling if we were the
  ones requesting the resize

include/rfb.js

@@ -54,7 +54,7 @@ var RFB;
             ['compress_hi',         -247 ],
             ['last_rect',           -224 ],
             ['xvp',                 -309 ],
-            ['ext_desktop_size',   -308 ]
+            ['ExtendedDesktopSize', -308 ]
         ];
 
         this._encHandlers = {};
@@ -1871,15 +1871,27 @@ var RFB;
             return true;
         },
 
-        ext_desktop_size: function () {
+        handle_FB_resize: function () {
+            this._fb_width = this._FBU.width;
+            this._fb_height = this._FBU.height;
+            this._display.resize(this._fb_width, this._fb_height);
+            this._onFBResize(this, this._fb_width, this._fb_height);
+            this._timing.fbu_rt_start = (new Date()).getTime();
+
+            this._FBU.bytes = 0;
+            this._FBU.rects -= 1;
+            return true;
+        },
+
+        ExtendedDesktopSize: function () {
             this._FBU.bytes = 1;
-            if (this._sock.rQwait("ext_desktop_size", this._FBU.bytes)) { return false; }
+            if (this._sock.rQwait("ExtendedDesktopSize", this._FBU.bytes)) { return false; }
 
             this._supportsSetDesktopSize = true;
             var number_of_screens = this._sock.rQpeek8();
 
             this._FBU.bytes = 4 + (number_of_screens * 16);
-            if (this._sock.rQwait("ext_desktop_size", this._FBU.bytes)) { return false; }
+            if (this._sock.rQwait("ExtendedDesktopSize", this._FBU.bytes)) { return false; }
 
             this._sock.rQskipBytes(1);  // number-of-screens
             this._sock.rQskipBytes(3);  // padding
@@ -1898,31 +1910,42 @@ var RFB;
                 }
             }
 
-            if (this._FBU.x == 0 && this._FBU.y != 0) { return true; }
-
-            this._fb_width = this._FBU.width;
-            this._fb_height = this._FBU.height;
-            this._display.resize(this._fb_width, this._fb_height);
-            this._onFBResize(this, this._fb_width, this._fb_height);
+            /*
+             * The x-position indicates the reason for the change:
+             *
+             *  0 - server resized on its own
+             *  1 - this client requested the resize
+             *  2 - another client requested the resize
+             */
 
-            this._FBU.bytes = 0;
-            this._FBU.rects -= 1;
+            // We need to handle errors when we requested the resize.
+            if (this._FBU.x == 1 && this._FBU.y != 0) {
+                var msg = "";
+                // The y-position indicates the status code from the server
+                switch (this._FBU.y) {
+                case 1:
+                    msg = "Resize is administratively prohibited";
+                    break;
+                case 2:
+                    msg = "Out of resources";
+                    break;
+                case 3:
+                    msg = "Invalid screen layout";
+                    break;
+                default:
+                    msg = "Unknown reason";
+                    break;
+                }
+                Util.Info("Server did not accept the resize request: " + msg);
+                return true;
+            }
 
+            this._encHandlers.handle_FB_resize();
             return true;
         },
 
         DesktopSize: function () {
-            Util.Debug(">> set_desktopsize");
-            this._fb_width = this._FBU.width;
-            this._fb_height = this._FBU.height;
-            this._display.resize(this._fb_width, this._fb_height);
-            this._onFBResize(this, this._fb_width, this._fb_height);
-            this._timing.fbu_rt_start = (new Date()).getTime();
-
-            this._FBU.bytes = 0;
-            this._FBU.rects--;
-
-            Util.Debug("<< set_desktopsize");
+            this._encHandlers.handle_FB_resize();
             return true;
         },
 

tests/test.rfb.js

@@ -1584,7 +1584,7 @@ describe('Remote Frame Buffer Protocol Client', function() {
                     });
 
                     it('should not handle a failed request', function () {
-                        var reason_for_change = 0; // non-incremental
+                        var reason_for_change = 1; // requested by this client
                         var status_code       = 1; // Resize is administratively prohibited
 
                         send_fbu_msg([{ x: reason_for_change, y: status_code,