ShadowRoot& ElementShadow::addShadowRoot(Element& shadowHost, ShadowRootType type)
{
EventDispatchForbiddenScope assertNoEventDispatch;
ScriptForbiddenScope forbidScript;
if (type == ShadowRootType::V0 && m_shadowRoot) {
DCHECK_EQ(m_shadowRoot->type(), ShadowRootType::V0);
Deprecation::countDeprecation(shadowHost.document(), UseCounter::ElementCreateShadowRootMultiple);
}
if (m_shadowRoot) {
// TODO(hayato): Is the order, from the youngest to the oldest, important?
for (ShadowRoot* root = &youngestShadowRoot(); root; root = root->olderShadowRoot())
root->lazyReattachIfAttached();
}
ShadowRoot* shadowRoot = ShadowRoot::create(shadowHost.document(), type);
shadowRoot->setParentOrShadowHostNode(&shadowHost);
shadowRoot->setParentTreeScope(shadowHost.treeScope());
appendShadowRoot(*shadowRoot);
setNeedsDistributionRecalc();
shadowRoot->insertedInto(&shadowHost);
shadowHost.setChildNeedsStyleRecalc();
shadowHost.setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::Shadow));
InspectorInstrumentation::didPushShadowRoot(&shadowHost, shadowRoot);
return *shadowRoot;
}
ShadowRoot& ElementShadow::addShadowRoot(Element& shadowHost, ShadowRootType type)
{
EventDispatchForbiddenScope assertNoEventDispatch;
ScriptForbiddenScope forbidScript;
if (type == ShadowRootType::V0) {
if (m_shadowRoots.isEmpty()) {
shadowHost.willAddFirstAuthorShadowRoot();
} else if (m_shadowRoots.head()->type() == ShadowRootType::UserAgent) {
shadowHost.willAddFirstAuthorShadowRoot();
UseCounter::countDeprecation(shadowHost.document(), UseCounter::ElementCreateShadowRootMultipleWithUserAgentShadowRoot);
} else {
UseCounter::countDeprecation(shadowHost.document(), UseCounter::ElementCreateShadowRootMultiple);
}
} else if (type == ShadowRootType::Open || type == ShadowRootType::Closed) {
shadowHost.willAddFirstAuthorShadowRoot();
}
for (ShadowRoot* root = m_shadowRoots.head(); root; root = root->olderShadowRoot())
root->lazyReattachIfAttached();
RefPtrWillBeRawPtr<ShadowRoot> shadowRoot = ShadowRoot::create(shadowHost.document(), type);
shadowRoot->setParentOrShadowHostNode(&shadowHost);
shadowRoot->setParentTreeScope(shadowHost.treeScope());
m_shadowRoots.push(shadowRoot.get());
setNeedsDistributionRecalc();
shadowRoot->insertedInto(&shadowHost);
shadowHost.setChildNeedsStyleRecalc();
shadowHost.setNeedsStyleRecalc(SubtreeStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::Shadow));
InspectorInstrumentation::didPushShadowRoot(&shadowHost, shadowRoot.get());
return *shadowRoot;
}
ShadowRoot& ElementShadow::addShadowRoot(Element& shadowHost, ShadowRoot::ShadowRootType type)
{
RefPtr<ShadowRoot> shadowRoot = ShadowRoot::create(shadowHost.document(), type);
for (ShadowRoot* root = youngestShadowRoot(); root; root = root->olderShadowRoot())
root->lazyReattachIfAttached();
shadowRoot->setParentOrShadowHostNode(&shadowHost);
shadowRoot->setParentTreeScope(shadowHost.treeScope());
m_shadowRoots.push(shadowRoot.get());
ChildNodeInsertionNotifier(shadowHost).notify(*shadowRoot);
setNeedsDistributionRecalc();
// addShadowRoot() affects apply-author-styles. However, we know that the youngest shadow root has not had any children yet.
// The youngest shadow root's apply-author-styles is default (false). So we can just set m_applyAuthorStyles false.
m_applyAuthorStyles = false;
shadowHost.didAddShadowRoot(*shadowRoot);
InspectorInstrumentation::didPushShadowRoot(&shadowHost, shadowRoot.get());
ASSERT(m_shadowRoots.head());
ASSERT(shadowRoot.get() == m_shadowRoots.head());
return *m_shadowRoots.head();
}