void ScopedStyleResolver::matchHostRules(ElementRuleCollector& collector, bool includeEmptyRules)
{
if (m_atHostRules.isEmpty() || !m_scopingNode->isElementNode())
return;
ElementShadow* shadow = toElement(m_scopingNode)->shadow();
if (!shadow)
return;
collector.clearMatchedRules();
collector.matchedResult().ranges.lastAuthorRule = collector.matchedResult().matchedProperties.size() - 1;
// FIXME(99827): https://bugs.webkit.org/show_bug.cgi?id=99827
// add a new flag to ElementShadow and cache whether any @host @-rules are
// applied to the element or not. So we can quickly exit this method
// by using the flag.
ShadowRoot* shadowRoot = shadow->youngestShadowRoot();
for (; shadowRoot; shadowRoot = shadowRoot->olderShadowRoot())
if (!ScopeContentDistribution::hasShadowElement(shadowRoot))
break;
// All shadow roots have <shadow>.
if (!shadowRoot)
shadowRoot = shadow->oldestShadowRoot();
StyleResolver::RuleRange ruleRange = collector.matchedResult().ranges.authorRuleRange();
collector.setBehaviorAtBoundary(static_cast<SelectorChecker::BehaviorAtBoundary>(SelectorChecker::DoesNotCrossBoundary | SelectorChecker::ScopeContainsLastMatchedElement));
for (; shadowRoot; shadowRoot = shadowRoot->youngerShadowRoot()) {
if (RuleSet* ruleSet = atHostRuleSetFor(shadowRoot))
collector.collectMatchingRules(MatchRequest(ruleSet, includeEmptyRules, m_scopingNode), ruleRange);
}
collector.sortAndTransferMatchedRules();
}
// FIXME: Move the following helper functions, authorShadowRootOf, firstWithinTraversingShadowTree,
// nextTraversingShadowTree to the best place, e.g. NodeTraversal.
static ShadowRoot* authorShadowRootOf(const ContainerNode& node)
{
if (!node.isElementNode() || !isShadowHost(&node))
return nullptr;
ElementShadow* shadow = toElement(node).shadow();
ASSERT(shadow);
for (ShadowRoot* shadowRoot = shadow->oldestShadowRoot(); shadowRoot; shadowRoot = shadowRoot->youngerShadowRoot()) {
if (shadowRoot->type() == ShadowRootType::OpenByDefault || shadowRoot->type() == ShadowRootType::Open)
return shadowRoot;
}
return nullptr;
}
// FIXME: Move the following helper functions, authorShadowRootOf, firstWithinTraversingShadowTree,
// nextTraversingShadowTree to the best place, e.g. NodeTraversal.
static ShadowRoot* authorShadowRootOf(const ContainerNode& node)
{
if (!node.isElementNode() || !isShadowHost(&node))
return 0;
ElementShadow* shadow = toElement(node).shadow();
ASSERT(shadow);
for (ShadowRoot* shadowRoot = shadow->oldestShadowRoot(); shadowRoot; shadowRoot = shadowRoot->youngerShadowRoot()) {
if (shadowRoot->type() == ShadowRoot::AuthorShadowRoot)
return shadowRoot;
}
return 0;
}
void InputType::destroyShadowSubtree()
{
ElementShadow* shadow = element()->shadow();
if (!shadow)
return;
ShadowRoot* root = shadow->oldestShadowRoot();
root->removeAllChildren();
// It's ok to clear contents of all other ShadowRoots because they must have
// been created by TextFieldDecorationElement, and we don't allow adding
// AuthorShadowRoot to HTMLInputElement.
while ((root = root->youngerShadowRoot())) {
root->removeAllChildren();
root->appendChild(HTMLShadowElement::create(shadowTag, element()->document()));
}
}
