PassRefPtr<ShadowRoot> ShadowRoot::create(Element* element, ShadowRootType type, ExceptionCode& ec)
{
if (!element) {
ec = HIERARCHY_REQUEST_ERR;
return 0;
}
// Since some elements recreates shadow root dynamically, multiple shadow subtrees won't work well in that element.
// Until they are fixed, we disable adding author shadow root for them.
if (type == AuthorShadowRoot && !allowsAuthorShadowRoot(element)) {
ec = HIERARCHY_REQUEST_ERR;
return 0;
}
RefPtr<ShadowRoot> shadowRoot = adoptRef(new ShadowRoot(element->document()));
shadowRoot->setType(type);
ec = 0;
element->ensureShadow()->addShadowRoot(element, shadowRoot, type, ec);
if (ec)
return 0;
ASSERT(element == shadowRoot->host());
ASSERT(element->shadow());
return shadowRoot.release();
}
PassRefPtr<ShadowRoot> ShadowRoot::create(Element* element, ShadowRootCreationPurpose purpose, ExceptionCode& ec)
{
#if ENABLE(SHADOW_DOM)
bool isMultipleShadowSubtreesEnabled = RuntimeEnabledFeatures::multipleShadowSubtreesEnabled();
#else
bool isMultipleShadowSubtreesEnabled = false;
#endif
if (!element || (!isMultipleShadowSubtreesEnabled && element->hasShadowRoot())) {
ec = HIERARCHY_REQUEST_ERR;
return 0;
}
// Since some elements recreates shadow root dynamically, multiple shadow subtrees won't work well in that element.
// Until they are fixed, we disable adding author shadow root for them.
if (purpose == CreatingAuthorShadowRoot && !allowsAuthorShadowRoot(element)) {
ec = HIERARCHY_REQUEST_ERR;
return 0;
}
ASSERT(purpose != CreatingUserAgentShadowRoot || !element->hasShadowRoot());
RefPtr<ShadowRoot> shadowRoot = adoptRef(new ShadowRoot(element->document()));
ec = 0;
element->ensureShadowTree()->addShadowRoot(element, shadowRoot, ec);
if (ec)
return 0;
ASSERT(element == shadowRoot->host());
ASSERT(element->hasShadowRoot());
return shadowRoot.release();
}
