Subj : JS_EvaluateScript
To   : netscape.public.mozilla.jseng
From : AC
Date : Thu Aug 11 2005 09:48 pm

Hi, All

I am trying to execute some JavaScript from XPCOM. E.g.
"document.getElementById('content')" or just "alert('hi')".

But I fail :-( The only thing I can do is to evaluate simple expression "7 +
8".

Here my code:

void test(nsIDOMWindow2 * pWindow)
{
    nsresult rv;

    nsCOMPtr<nsIScriptGlobalObject> pScriptObject;
    pScriptObject = do_QueryInterface(pWindow, &rv);

    JSContext* pJSContext = nsnull;
    jsval jval;

    jsval jsargs = 0L;

    if(pScriptObject != nsnull)
    {
        // Get the script context
        nsCOMPtr<nsIScriptContext> pScript;
        pScript = pScriptObject->GetContext();

        if(pScript != nsnull)
        {
            pJSContext = (JSContext*)pScript->GetNativeContext();

            if(pJSContext != nsnull)
            {
                JSBool jb;

                const char * script = "alert(6)";
                jb = pJS_EvaluateScript(pJSContext,
pJSContext->globalObject,
                    script, strlen(script),
                    "", 0, &jval);
            }
        }
    }
}

What I am doing wrong?


Thanks in advance!
    Alex

.