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gregdove pushed a commit to branch develop
in repository https://gitbox.apache.org/repos/asf/royale-asjs.git

commit 783718ab6167569ee8f18415e35e86a811e88071
Author: greg-dove <[email protected]>
AuthorDate: Tue Apr 19 11:27:51 2022 +1200

    In JS (at least) provide a warning in debug builds (only) when cloning an 
Event subclass that does not override the cloneEvent method.
---
 .../projects/Core/src/main/royale/CoreClasses.as   |  1 +
 .../org/apache/royale/debugging/alreadyRecorded.as | 58 ++++++++++++++++++++++
 .../org/apache/royale/events/EventDispatcher.as    | 17 +++++++
 3 files changed, 76 insertions(+)

diff --git a/frameworks/projects/Core/src/main/royale/CoreClasses.as 
b/frameworks/projects/Core/src/main/royale/CoreClasses.as
index 8dc1095798..69847ef491 100644
--- a/frameworks/projects/Core/src/main/royale/CoreClasses.as
+++ b/frameworks/projects/Core/src/main/royale/CoreClasses.as
@@ -327,6 +327,7 @@ internal class CoreClasses
        // import org.apache.royale.debugging.conditionalBreak; 
conditionalBreak;
        import org.apache.royale.debugging.notNull; notNull;
        import org.apache.royale.debugging.throwError; throwError;
+       import org.apache.royale.debugging.alreadyRecorded; alreadyRecorded;
 
        import org.apache.royale.utils.measureComponent; measureComponent;
        import org.apache.royale.utils.loadBeadFromValuesManager; 
loadBeadFromValuesManager;
diff --git 
a/frameworks/projects/Core/src/main/royale/org/apache/royale/debugging/alreadyRecorded.as
 
b/frameworks/projects/Core/src/main/royale/org/apache/royale/debugging/alreadyRecorded.as
new file mode 100644
index 0000000000..7362657d2a
--- /dev/null
+++ 
b/frameworks/projects/Core/src/main/royale/org/apache/royale/debugging/alreadyRecorded.as
@@ -0,0 +1,58 @@
+////////////////////////////////////////////////////////////////////////////////
+//
+//  Licensed to the Apache Software Foundation (ASF) under one or more
+//  contributor license agreements.  See the NOTICE file distributed with
+//  this work for additional information regarding copyright ownership.
+//  The ASF licenses this file to You under the Apache License, Version 2.0
+//  (the "License"); you may not use this file except in compliance with
+//  the License.  You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////////
+package org.apache.royale.debugging
+{
+
+    /**
+     * If this method has been called with forObject previously, this method 
returns true, otherwise if this is the first time,
+     * it returns false
+     */
+    public function alreadyRecorded(forObject:Object):Boolean
+    {
+        var recorded:Boolean = true;
+        COMPILE::SWF
+        {
+             if (!map[forObject])  {
+                 map[forObject] = true;
+                 recorded = false;
+             }
+        }
+        COMPILE::JS
+        {
+           if (!map.has(forObject)) {
+               map.set(forObject, true);
+               recorded = false;
+           }
+        }
+
+        return recorded;
+    }
+}
+
+COMPILE::SWF{
+    import flash.utils.Dictionary;
+}
+
+
+COMPILE::JS
+var map:WeakMap = new WeakMap();
+
+
+COMPILE::SWF
+var map:Dictionary = new Dictionary(true)
diff --git 
a/frameworks/projects/Core/src/main/royale/org/apache/royale/events/EventDispatcher.as
 
b/frameworks/projects/Core/src/main/royale/org/apache/royale/events/EventDispatcher.as
index 3a19f12f78..d77255758e 100644
--- 
a/frameworks/projects/Core/src/main/royale/org/apache/royale/events/EventDispatcher.as
+++ 
b/frameworks/projects/Core/src/main/royale/org/apache/royale/events/EventDispatcher.as
@@ -24,6 +24,9 @@ package org.apache.royale.events
                import goog.events.Listener;
                import goog.events.EventTarget;
                import org.apache.royale.events.Event;
+
+               import org.apache.royale.debugging.alreadyRecorded;
+               import goog.DEBUG;
        }
 
        COMPILE::SWF
@@ -101,7 +104,21 @@ package org.apache.royale.events
                                else if ("target" in event1) {
                                        if (event1.target && event1 is 
IRoyaleEvent) {
                                                //we are re-dispatching, we 
need to clone the original:
+                                               if(goog.DEBUG)
+                                               {
+                                                       var original:Object = 
event1;
+                                               }
                                                event1 = 
IRoyaleEvent(event1).cloneEvent();
+                                               if(goog.DEBUG)
+                                               {
+                                                       if (event1.constructor 
!= original.constructor) {
+                                                               var 
notAlreadyRecorded:Boolean = !alreadyRecorded(original.constructor);
+                                                               if 
(notAlreadyRecorded) {
+                                                                       //this 
should help identify missing cloneEvent requirements:
+                                                                       
console.warn(original.constructor.prototype.ROYALE_CLASS_INFO.names[0].qName + 
' is missing a cloneEvent method override, this should be implemented, 
otherwise it is being cloned as :' + 
event1.constructor.prototype.ROYALE_CLASS_INFO.names[0].qName);
+                                                               }
+                                                       }
+                                               }
                                        }
                                        event1.target = _dispatcher;
                                        //console.log("assigned target to event 
",event);

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