Re: Getting tab URL in C++

On Apr 10, 7:15 am, Jens Sorensen <[email protected]> wrote:
> You are almost there..
>
> If you bring up DOM inspector then you will notice that the
> 'browsers/tabs' are actually located under the 'xul:panels' node which
> has the anonid value of "panelcontainer" and not "tabcontainer".  You
> passed "tabcontainer" in to "GetAnonymousElementByAttribute" which is
> not correct. You will also notice that this element contains multiple
> 'xul:notificationbox' elements (one for each tab) and that the
> 'xul:browser' node is the last child of the 'xul:notificationbox'.
>
> The 'xul:browser" node is what you are looking for.
>
> Here is the updated code.
>
>         nsresult rv;
>         nsCOMPtr<nsIWindowMediator> windowMediator =
> do_GetService(NS_WINDOWMEDIATOR_CONTRACTID, &rv);
>
>         nsCOMPtr<nsIDOMWindowInternal> dwi;
>         windowMediator->GetMostRecentWindow(L"navigator:browser", getter_AddRefs(dwi));
>         nsCOMPtr<nsIDOMDocument> doc;
>         dwi->GetDocument(getter_AddRefs(doc));
>
>         nsCOMPtr<nsIDOMDocumentXBL> xbl(do_QueryInterface(doc));
>
>         nsCOMPtr<nsIDOMElement> domEl;
>         doc->GetElementById(NS_LITERAL_STRING("content"), getter_AddRefs(domEl));
>         nsCOMPtr<nsIDOMElement> pAnoEl;
>
>         // getting xul:tabpanels
>         xbl->GetAnonymousElementByAttribute(domEl,
> NS_LITERAL_STRING("anonid"), NS_LITERAL_STRING("panelcontainer"),
> getter_AddRefs(pAnoEl)  );
>         nsString retval;
>         PRBool bRet = 0;
>         nsCOMPtr<nsIDOMNodeList> nodeList;
>         pAnoEl->GetChildNodes(getter_AddRefs(nodeList));
>         nsCOMPtr<nsIDOMNode> domNode;
>
>         PRUint32 len = 0;
>         rv = nodeList->GetLength(&len);
>
>         for( PRUint32 i=0; i<len; i++ )
>         {
>                 // getting the xul::notificationbox
>                 nsCOMPtr<nsIDOMNode> domNode;
>                 nodeList->Item(i, getter_AddRefs(domNode));
>
>                 // get the last child of the 'xul::notificationbox' which is the 'xul:browser'
>                 nsCOMPtr<nsIDOMNode> domXULBrowser;
>                 domNode->GetLastChild(getter_AddRefs(domXULBrowser));
>
>                 nsCOMPtr<nsIDOMXULElement> xulElement = do_QueryInterface(domXULBrowser);
>                 nsCOMPtr<nsIBoxObject> boxObject;
>                 xulElement->GetBoxObject(getter_AddRefs(boxObject));
>                 nsCOMPtr<nsIBrowserBoxObject> browserboxObject = do_QueryInterface(boxObject);
>
>                 nsCOMPtr<nsIDocShell> docShell;
>                 browserboxObject->GetDocShell(getter_AddRefs(docShell));
>
>                 nsCOMPtr<nsIWebNavigation> webNav = do_QueryInterface(docShell);
>
>                 nsCOMPtr<nsIURI> uri;
>                 webNav->GetCurrentURI(getter_AddRefs(uri));
>
>                 nsCString path;
>                 uri->GetAsciiSpec(path);
>         }
>
> If you do this early in the stage then the uri might be NULL or the
> URL will most likely be about:blank.
>
> I suggest that you add "TabOpen", "TabSelect" "TabXXXX" event
> listeners if you need to track tab creation, destruction etc.
>
> nsCOMPtr<nsIDOMEventTarget> eventTarget = do_QueryInterface(dwi);
> eventTarget->AddEventListener(.....)
>
> Remember to check for null pointers etc..
> Cheers,
> Jens Sorensen
>
>         nsresult rv;
>         nsCOMPtr<nsIWindowMediator> windowMediator =
> do_GetService(NS_WINDOWMEDIATOR_CONTRACTID, &rv);
>
>         nsCOMPtr<nsIDOMWindowInternal> dwi;
>         windowMediator->GetMostRecentWindow(L"navigator:browser", getter_AddRefs(dwi));
>         nsCOMPtr<nsIDOMDocument> doc;
>         dwi->GetDocument(getter_AddRefs(doc));
>
>         nsCOMPtr<nsIDOMDocumentXBL> xbl(do_QueryInterface(doc));
>
>         nsCOMPtr<nsIDOMElement> domEl;
>         doc->GetElementById(NS_LITERAL_STRING("content"), getter_AddRefs(domEl));
>         nsCOMPtr<nsIDOMElement> pAnoEl;
>
>         // getting xul:tabpanels
>         xbl->GetAnonymousElementByAttribute(domEl,
> NS_LITERAL_STRING("anonid"), NS_LITERAL_STRING("panelcontainer"),
> getter_AddRefs(pAnoEl)  );
>         nsString retval;
>         PRBool bRet = 0;
>         nsCOMPtr<nsIDOMNodeList> nodeList;
>         pAnoEl->GetChildNodes(getter_AddRefs(nodeList));
>         nsCOMPtr<nsIDOMNode> domNode;
>
>         PRUint32 len = 0;
>         rv = nodeList->GetLength(&len);
>
>         for( PRUint32 i=0; i<len; i++ )
>         {
>                 // getting the xul::notificationbox
>                 nsCOMPtr<nsIDOMNode> domNode;
>                 nodeList->Item(i, getter_AddRefs(domNode));
>
>                 // get the last child of the 'xul::notificationbox' which is the 'xul:browser'
>                 nsCOMPtr<nsIDOMNode> domXULBrowser;
>                 domNode->GetLastChild(getter_AddRefs(domXULBrowser));
>
>                 nsCOMPtr<nsIDOMXULElement> xulElement = do_QueryInterface(domXULBrowser);
>                 nsCOMPtr<nsIBoxObject> boxObject;
>                 xulElement->GetBoxObject(getter_AddRefs(boxObject));
>                 nsCOMPtr<nsIBrowserBoxObject> browserboxObject = do_QueryInterface(boxObject);
>
>                 nsCOMPtr<nsIDocShell> docShell;
>                 browserboxObject->GetDocShell(getter_AddRefs(docShell));
>
>                 nsCOMPtr<nsIWebNavigation> webNav = do_QueryInterface(docShell);
>
>                 nsCOMPtr<nsIURI> uri;
>                 webNav->GetCurrentURI(getter_AddRefs(uri));
>
>                 nsCString path;
>                 uri->GetAsciiSpec(path);
>         }
>
>
>
> On Thu, Apr 8, 2010 at 6:04 AM, Vaibhav <[email protected]> wrote:
> > Hi,
>
> > I am writing Firefox extension using C++.
>
> > I am enumerating the tabs to get their respective URLs.
>
> > Following is pseudocode:
>
> > /////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////// ///
>
> > nsCOMPtr<nsIWindowMediator> windowMediator =
> > do_GetService(NS_WINDOWMEDIATOR_CONTRACTID, &rv);
> > windowMediator->GetMostRecentWindow(L"navigator:browser",
> > getter_AddRefs(dwi));
> > dwi->GetDocument(getter_AddRefs(doc));
> > nsCOMPtr<nsIDOMDocumentXBL> xbl(do_QueryInterface(doc));
> > doc->GetElementById(NS_LITERAL_STRING("content"),
> > getter_AddRefs(domEl));
> > nsCOMPtr<nsIDOMElement> pAnoEl;
> > xbl->GetAnonymousElementByAttribute(
> >                                                                domEl,
> >                                                                NS_LITERAL_STRING("anonid"),
> >                                                                NS_LITERAL_STRING("tabcontainer"),
> >                                                                getter_AddRefs(pAnoEl)
> >                                                                );
> > nsString retval;
> > PRBool bRet = 0;
> > nsCOMPtr<nsIDOMNodeList> nodeList;
> > pAnoEl->GetChildNodes(getter_AddRefs(nodeList));
> > nsCOMPtr<nsIDOMNode> domNode;
> > rv = nodeList->GetLength(&len);
> > for (PRUint32 i = 0; i < len; i++)
> > {
> >        nodeList->Item(i, getter_AddRefs(domNode));
> >        nsCOMPtr<nsIDOMXULElement> xulElement = do_QueryInterface(domNode);
> >        nsCOMPtr<nsIBoxObject> boxObject;
> >        xulElement->GetBoxObject(getter_AddRefs(boxObject));
> >        nsCOMPtr<nsIBrowserBoxObject> browserboxObject =
> > do_QueryInterface(boxObject);
> > }
>
> > /////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////// ///
>
> > In the above code QueryInterface for getting nsIBrowserBoxObject fails
> > with error code: NS_ERROR_NO_INTERFACE.
>
> > Please suggest me the ways to get tab URL.
>
> > Help Me !!!
>
> > Thanks,
> > Vaibhav.
> > _______________________________________________
> > dev-tech-dom mailing list
> > [email protected]
> >https://lists.mozilla.org/listinfo/dev-tech-dom

Hi Jens,

Thanks a lot.
It is a solution.

Vaibhav.