ImportLoader* ImportManager::GetNearestPredecessor(nsINode* aNode)
{
// Return the previous link if there is any in the same document.
nsIDocument* doc = aNode->OwnerDoc();
int32_t idx = doc->IndexOfSubImportLink(aNode);
MOZ_ASSERT(idx != -1, "aNode must be a sub import link of its owner document");
for (; idx > 0; idx--) {
HTMLLinkElement* link =
static_cast<HTMLLinkElement*>(doc->GetSubImportLink(idx - 1));
nsCOMPtr<nsIURI> uri = link->GetHrefURI();
RefPtr<ImportLoader> ret;
mImports.Get(uri, getter_AddRefs(ret));
// Only main referrer links are interesting.
if (ret->GetMainReferrer() == link) {
return ret;
}
}
if (idx == 0) {
if (doc->IsMasterDocument()) {
// If there is no previous one, and it was the master document, then
// there is no predecessor.
return nullptr;
}
// Else we find the main referrer of the import parent of the link's document.
// And do a recursion.
ImportLoader* owner = Find(doc);
MOZ_ASSERT(owner);
nsCOMPtr<nsINode> mainReferrer = owner->GetMainReferrer();
return GetNearestPredecessor(mainReferrer);
}
return nullptr;
}
ImportLoader*
ImportManager::Find(nsINode* aLink)
{
HTMLLinkElement* linkElement = static_cast<HTMLLinkElement*>(aLink);
nsCOMPtr<nsIURI> uri = linkElement->GetHrefURI();
return mImports.GetWeak(uri);
}