Subj : Re: void Viewport2D::testMe()
To   : =?ISO-8859-1?Q?R=E9my_Deslignes?=
From : Brendan Eich
Date : Thu Jul 08 2004 04:04 pm

Rémy Deslignes wrote:
> Hi,
> 
> I am currently having troubles while accessing to an HTMLEmbed element 
> (a flash player in fact) within a loaded page :


Wrong newsgroup, I think.

/be


> 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))
>                     {
>                     }
>                 }
>             }
>         }
>     }
>

.