The code that I previously posted was not complete.
To review, I am trying to temporarily disable links in
my embedded app. The following code snippet attempts
to do just that:
nsCOMPtr<nsIDOMHTMLCollection> links;
domdoc->GetLinks(getter_AddRefs(links));
PRUint32 numnodes;
links->GetLength(&numnodes);
nsCOMPtr<nsIDOMNode> link;
for (unsigned int i = 0; i < numnodes; i++)
{
links->Item(i, getter_AddRefs(link));
nsCOMPtr<nsIDOMHTMLImageElement> image =
(do_QueryInterface(link));
nsCOMPtr<nsIDOMHTMLLinkElement> alink =
(do_QueryInterface(link));
nsCOMPtr<nsIDOMHTMLAnchorElement> anchor =
(do_QueryInterface(link));
if (image) printf("node is image\n");
else if (alink) alink->SetDisabled(FALSE);
else if (anchor) printf("node is anchor\n");
}
I have found that all links in the collection are considered of type
nsIDOMHTMLAnchorElement. This is not the behavior I expected.
If anyone has a solution to this problem, please let me know. Thanks.
John Stewart
John Stewart wrote:
> I am trying to figure out a way to disable links in my embedded app, and
> I have been unsuccessful. After some investigation, I would have thought
> the following code snippet to be a solution to my problem:
>
> nsCOMPtr<nsIDOMHTMLDocument> domdoc;
> rv = doc->QueryInterface(nsIDOMHTMLDocument::GetIID(),
> getter_AddRefs(domdoc));
>
> if (NS_FAILED(rv)) return;
>
> nsCOMPtr<nsIDOMHTMLCollection> links;
> domdoc->GetLinks(getter_AddRefs(links));
>
> PRUint32 numnodes;
> links->GetLength(&numnodes);
>
> nsCOMPtr<nsIDOMNode> link;
> for (unsigned int i = 0; i < numnodes; i++)
> {
> // The following line does not produce the correct result. The
> elements in the
> // collection are of the type nsIDOMHTMLAnchorElement...
> nsCOMPtr<nsIDOMHTMLLinkElement> alink =
> (do_QueryInterface(link));
>
> alink->SetDisabled(FALSE);
> }
>
> If anyone knows of a solution to this problem, I would appreciate
> hearing from you. Thanks.
>
> John Stewart
