Subj : void Viewport2D::testMe()
To   : netscape.public.mozilla.jseng
From : =?ISO-8859-1?Q?R=E9my_Deslignes?=
Date : Thu Jul 08 2004 06:37 pm

Hi,

I am currently having troubles while accessing to an HTMLEmbed element (a flash player in fact) within a loaded page :
I can get the DOM object, *probably* can create the related JSObject, but I cannot get the SetVariable property ( which I can see with the DOM    Inspector ) , neither call this function...
I am probably doing somethin wrong while creating my JsContext... But I dont't know what !!
If someone, on earth or below, can help me , I can assume that he / she would graduate a higher karma for this life and maybe for the next ones...

Regards,

     	nsresult rv;
     	// gets the XPConnect component
	nsCOMPtr<nsIXPConnect> xpc(do_GetService(nsIXPConnect::GetCID(), &rv));
	// gets the document
	nsCOMPtr<nsIDOMDocument> doc;
	webNav->GetDocument(getter_AddRefs(doc)) ;
	// gets the JSContext
	JSContext* cx;
	nsCOMPtr<nsIDocument> idoc = do_QueryInterface(doc);
	nsCOMPtr<nsIScriptGlobalObject> global;
	idoc->GetScriptGlobalObject(getter_AddRefs(global));
     	nsCOMPtr<nsIScriptContext> context;
     	global->GetContext(getter_AddRefs(context));
     	cx = NS_REINTERPRET_CAST(JSContext*, context->GetNativeContext());
	
	//GetContextFromDocument(idoc,&cx);

	nsCOMPtr<nsIDOMElement> element;
	doc->GetElementById(NS_LITERAL_STRING("myFlash"), getter_AddRefs(element));
	nsCOMPtr<nsIDOMNodeList> childNodes;	
	element->GetChildNodes(getter_AddRefs(childNodes));	
	PRUint32 length;
	childNodes->GetLength(&length);
	for (unsigned int i=0; i<length;i++)
	{
		nsCOMPtr<nsIDOMNode> subNode;
		childNodes->Item(i,getter_AddRefs(subNode));
		nsCOMPtr<nsIClassInfo> test;
		subNode->QueryInterface(NS_GET_IID(nsIClassInfo), getter_AddRefs(test));	
		
		nsCOMPtr<nsIDOMHTMLEmbedElement> HTMLEmbedElement = do_QueryInterface(subNode);
		if (HTMLEmbedElement)
		{
			
			nsCOMPtr<nsISupports> s;
			test->GetHelperForLanguage(nsIProgrammingLanguage::JAVASCRIPT,getter_AddRefs(s));
			nsCOMPtr<nsIXPCScriptable> helper(do_QueryInterface(s));
			
			nsCOMPtr<nsIXPConnectJSObjectHolder> wrapper;
			rv = xpc->WrapNative(cx, ::JS_GetGlobalObject(cx), subNode,
									NS_GET_IID(nsIDOMHTMLEmbedElement), getter_AddRefs(wrapper));
			NS_ASSERTION(rv, "");
			
			nsCOMPtr<nsIXPConnectWrappedNative> native_wrapper;
			rv = xpc->GetWrappedNativeOfNativeObject(cx, ::JS_GetGlobalObject(cx), subNode,
                                     NS_GET_IID(nsIDOMHTMLEmbedElement),getter_AddRefs(native_wrapper));
			NS_ASSERTION(rv, "");

			// nsCOMPtr<nsIXPConnectWrappedNative> wrapper;
			// xpc->GetWrappedNativeOfNativeObject(cx, ::JS_GetGlobalObject(cx), subNode, NS_GET_IID(nsIDOMNode),getter_AddRefs(wrapper));
		
		
			if (wrapper)
			{
				JSObject *jsobj;
				if(NS_SUCCEEDED(wrapper->GetJSObject(&jsobj)))
				{

					helper->PostCreate(native_wrapper, cx, jsobj);
					jsval fval = OBJECT_TO_JSVAL(jsobj);
					jsval argv[3], retval;
					argv[0] = OBJECT_TO_JSVAL(jsobj);
					argv[1] = STRING_TO_JSVAL("myVar");
					argv[2] = STRING_TO_JSVAL("test");
------>					/* ----ALWAYS GET JSVAL_VOID */
					JS_GetProperty(cx,::JS_GetGlobalObject(cx) ,"SetVariable", &fval);
					if (fval!=JSVAL_VOID)
					{

					}
------>					/* ----RETURN BUT DOES ANYTHING */
					if (JS_CallFunctionName(cx, ::JS_GetGlobalObject(cx), "SetVariable", 3, argv, &retval))
					{
					}
				}
			}
		}
	}

.