nsEventStates
Link::LinkState() const
{
// We are a constant method, but we are just lazily doing things and have to
// track that state. Cast away that constness!
Link *self = const_cast<Link *>(this);
// If we are not in the document, default to not visited.
Element *element = self->mElement;
if (!element->IsInDoc()) {
self->mLinkState = eLinkState_Unvisited;
}
// If we have not yet registered for notifications and are in an unknown
// state, register now!
if (!mRegistered && mLinkState == eLinkState_Unknown) {
// First, make sure the href attribute has a valid link (bug 23209).
nsCOMPtr<nsIURI> hrefURI(GetURI());
if (!hrefURI) {
self->mLinkState = eLinkState_NotLink;
return nsEventStates();
}
// Assume that we are not visited until we are told otherwise.
self->mLinkState = eLinkState_Unvisited;
// We have a good href, so register with History.
if (mHistory) {
nsresult rv = mHistory->RegisterVisitedCallback(hrefURI, self);
if (NS_SUCCEEDED(rv)) {
self->mRegistered = true;
// And make sure we are in the document's link map.
nsIDocument *doc = element->GetCurrentDoc();
if (doc) {
doc->AddStyleRelevantLink(self);
}
}
}
}
// Otherwise, return our known state.
if (mLinkState == eLinkState_Visited) {
return NS_EVENT_STATE_VISITED;
}
if (mLinkState == eLinkState_Unvisited) {
return NS_EVENT_STATE_UNVISITED;
}
return nsEventStates();
}
EventStates
Link::LinkState() const
{
// We are a constant method, but we are just lazily doing things and have to
// track that state. Cast away that constness!
Link *self = const_cast<Link *>(this);
Element *element = self->mElement;
// If we have not yet registered for notifications and need to,
// due to our href changing, register now!
if (!mRegistered && mNeedsRegistration && element->IsInComposedDoc()) {
// Only try and register once.
self->mNeedsRegistration = false;
nsCOMPtr<nsIURI> hrefURI(GetURI());
// Assume that we are not visited until we are told otherwise.
self->mLinkState = eLinkState_Unvisited;
// Make sure the href attribute has a valid link (bug 23209).
// If we have a good href, register with History if available.
if (mHistory && hrefURI) {
nsresult rv = mHistory->RegisterVisitedCallback(hrefURI, self);
if (NS_SUCCEEDED(rv)) {
self->mRegistered = true;
// And make sure we are in the document's link map.
element->GetComposedDoc()->AddStyleRelevantLink(self);
}
}
}
// Otherwise, return our known state.
if (mLinkState == eLinkState_Visited) {
return NS_EVENT_STATE_VISITED;
}
if (mLinkState == eLinkState_Unvisited) {
return NS_EVENT_STATE_UNVISITED;
}
return EventStates();
}
