I am writing an XPCOM extension for Firefox. The component implements the nsIWebProgressListener interface to listen to various events from the browser.
Now what I want to do is to obtain the adress of the webpage that is being displayed in the window when the OnStateChange methods of nsIWebProgressListener reaches the state: STATE_STOP | STATE_IS_DOCUMENT.
As mentioned by someone else, I obtained the nsIWebNavigation interface as following:
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// Get the service manager
nsCOMPtr<nsIServiceManager> pServman;
NS_GetServiceManager(getter_AddRefs(pServman));
// Get the web browser
nsCOMPtr<nsIWebBrowser> pWebBrowser;
pServman->GetServiceByContractID("@mozilla.org/embedding/browser/nsWebBrowser;1" , NS_GET_IID(nsIWebBrowser), getter_AddRefs(pWebBrowser));
nsCOMPtr<nsIWebNavigation> pWebNav(do_QueryInterface(pWebBrowser, &rv)); ---------------------------------------
It is ok till here. I have some pointer in pWebNav and the status rv is OK. But when I try to get the URI by calling:
nsCOMPtr<nsIURI> pURI; pWebNav->GetCurrentURI(getter_AddRefs(pURI));
this method fails.
Anyone know where I went wrong? Or you may know another way to do it? Any simple sample code may be great.
I would appriciate very much your help
Vonuyx
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