Hi, All:
I have a big trouble to get URL from XPCOM/C++/plugin. It is very simple
to get URL from IE with interface IWebBrowser2. I want to do samething
within a mozilla browser like firefox and netscape, but I can't.
Here is some code I wrote to get
nsresult rv;
nsIComponentManager *pIComponentManager = NULL;
nsIDOMDocument *pIDOMDocument = NULL;
nsISupports *pISupports = NULL;
nsIURL *pIURL = NULL;
do
{
rv = NS_GetComponentManager(&pIComponentManager);
if(pIComponentManager == NULL)
break;
rv =
pIComponentManager->GetClassObjectByContractID("@mozilla.org/network/standard-url;1",
NS_GET_IID(nsISupports), (void**)&pISupports);
if(pISupports == NULL)
{
rv = pISupports->QueryInterface(NS_GET_IID(nsIURL), (void**)&pIURL); //<---
fails here with no interface available
}
if(pISupports != NULL)
{
pISupports->Release();
pISupports = NULL;
}
rv =
pIComponentManager->GetClassObjectByContractID("@mozilla.org/xul/xul-document;1",
NS_GET_IID(nsISupports), (void**)&pISupports);
if(pISupports)
rv = pISupports->QueryInterface(NS_GET_IID(nsIDOMDocument),
(void**)&pIDOMDocument); //<--- fails here with no interface available
}while(false);
if(pIDOMDocument != NULL)
pIDOMDocument->Release();
if(pIURL != NULL)
pIURL->Release();
if(pISupports != NULL)
pISupports->Release();
if(pIComponentManager != NULL)
pIComponentManager->Release();
With the above code, I can get the components nsISupports and but can
not get expected interfaces. What is wrong with the above code? Why does my
code fail? I can not find any clues from Internet by doing Yahoo and Google
searches.
Please give me a help!
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