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XPCOM do_QueryInterface with nsIDOMNode fails under Firefox 10
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Martin Novak  
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 More options Apr 26 2012, 9:28 am
Newsgroups: mozilla.addons.chromebug
From: Martin Novak <m.no...@tricentis.com>
Date: Thu, 26 Apr 2012 15:28:52 +0200
Local: Thurs, Apr 26 2012 9:28 am
Subject: XPCOM do_QueryInterface with nsIDOMNode fails under Firefox 10
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I use a binray XPCOM with VisualStudio 10 compiled against xulrunner-10.0.en-US.win32.sdk
I do QueryInterface nsIDOMNode to nsIDOMElement, but it fails under Firefox 10
Same Code with same project compiled against xulrunner-11 sdk under Firefox 11 does his job correctly.
Also Firefox 3.6 works.
Only Firefox 10 has problems.

I cannot find anything about this problem.
I have no idea.

Best Regards,
Martin

CODE:
        if(xmlDoc!=NULL)
        {
                xmlDoc->GetElementsByTagName(NS_LITERAL_STRING("Control"), getter_AddRefs(resultList));
                if(resultList!=NULL)
                {
                        resultList->GetLength(&length);

                        if(length != 0)
                        {
                                resultList->Item(0, getter_AddRefs(node));
                                if(node!=NULL)
                                {
                                        domElement = do_QueryInterface(node,&rv);    //FAILS UNDER FIREFOX 10: NO_INTERFACES_ERROR
                                        if(domElement!=NULL)
                                        {
                                                bool retbool = false;
                                                domElement->HasAttribute(attribute, &retbool);
                                                if(retbool == (bool) true)
                                                {
                                                        domElement->GetAttribute(attribute,retval);
                                                }
                                        }
                                }
                        }
                }
        }


 
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