EInsideLink VisitedLinkState::determineLinkStateSlowCase(const Element& element)
{
DCHECK(element.isLink());
DCHECK(document().isActive());
DCHECK(document() == element.document());
const AtomicString& attribute = linkAttribute(element);
if (attribute.isNull())
return NotInsideLink; // This can happen for <img usemap>
// An empty attribute refers to the document itself which is always
// visited. It is useful to check this explicitly so that visited
// links can be tested in platform independent manner, without
// explicit support in the test harness.
if (attribute.isEmpty())
return InsideVisitedLink;
if (LinkHash hash = linkHashForElement(element, attribute)) {
m_linksCheckedForVisitedState.add(hash);
if (Platform::current()->isLinkVisited(hash))
return InsideVisitedLink;
}
return InsideUnvisitedLink;
}
void VisitedLinkState::invalidateStyleForLink(LinkHash linkHash)
{
if (!m_linksCheckedForVisitedState.contains(linkHash))
return;
for (Node* node = document().firstChild(); node; node = NodeTraversal::next(*node)) {
if (node->isLink() && linkHashForElement(toElement(*node)) == linkHash)
node->setNeedsStyleRecalc(SubtreeStyleChange);
}
}
static void invalidateStyleForLinkRecursively(Node& rootNode, LinkHash linkHash)
{
for (Node& node : NodeTraversal::startsAt(rootNode)) {
if (node.isLink() && linkHashForElement(toElement(node)) == linkHash) {
toElement(node).pseudoStateChanged(CSSSelector::PseudoLink);
toElement(node).pseudoStateChanged(CSSSelector::PseudoVisited);
toElement(node).pseudoStateChanged(CSSSelector::PseudoAnyLink);
}
if (isShadowHost(&node))
for (ShadowRoot* root = node.youngestShadowRoot(); root; root = root->olderShadowRoot())
invalidateStyleForLinkRecursively(*root, linkHash);
}
}
