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32 #include "core/dom/custom/CustomElementRegistry.h"
34 #include "bindings/core/v8/CustomElementConstructorBuilder.h"
35 #include "core/HTMLNames.h"
36 #include "core/SVGNames.h"
37 #include "core/dom/DocumentLifecycleObserver.h"
38 #include "core/dom/custom/CustomElementException.h"
39 #include "core/dom/custom/CustomElementRegistrationContext.h"
43 class RegistrationContextObserver : public DocumentLifecycleObserver {
45 explicit RegistrationContextObserver(Document* document)
46 : DocumentLifecycleObserver(document)
47 , m_wentAway(!document)
51 bool registrationContextWentAway() { return m_wentAway; }
55 // In oilpan we don't have the disposed phase for context lifecycle observer.
56 virtual void documentWasDetached() override { m_wentAway = true; }
58 virtual void documentWasDisposed() override { m_wentAway = true; }
64 CustomElementDefinition* CustomElementRegistry::registerElement(Document* document, CustomElementConstructorBuilder* constructorBuilder, const AtomicString& userSuppliedName, CustomElement::NameSet validNames, ExceptionState& exceptionState)
66 // FIXME: In every instance except one it is the
67 // CustomElementConstructorBuilder that observes document
68 // destruction during registration. This responsibility should be
69 // consolidated in one place.
70 RegistrationContextObserver observer(document);
72 AtomicString type = userSuppliedName.lower();
74 if (!constructorBuilder->isFeatureAllowed()) {
75 CustomElementException::throwException(CustomElementException::CannotRegisterFromExtension, type, exceptionState);
79 if (!CustomElement::isValidName(type, validNames)) {
80 CustomElementException::throwException(CustomElementException::InvalidName, type, exceptionState);
84 if (m_registeredTypeNames.contains(type)) {
85 CustomElementException::throwException(CustomElementException::TypeAlreadyRegistered, type, exceptionState);
89 QualifiedName tagName = QualifiedName::null();
90 if (!constructorBuilder->validateOptions(type, tagName, exceptionState))
93 ASSERT(tagName.namespaceURI() == HTMLNames::xhtmlNamespaceURI || tagName.namespaceURI() == SVGNames::svgNamespaceURI);
95 ASSERT(!observer.registrationContextWentAway());
97 RefPtr<CustomElementLifecycleCallbacks> lifecycleCallbacks = constructorBuilder->createCallbacks();
99 // Consulting the constructor builder could execute script and
100 // kill the document.
101 if (observer.registrationContextWentAway()) {
102 CustomElementException::throwException(CustomElementException::ContextDestroyedCreatingCallbacks, type, exceptionState);
106 const CustomElementDescriptor descriptor(type, tagName.namespaceURI(), tagName.localName());
107 RefPtr<CustomElementDefinition> definition = CustomElementDefinition::create(descriptor, lifecycleCallbacks);
109 if (!constructorBuilder->createConstructor(document, definition.get(), exceptionState))
112 m_definitions.add(descriptor, definition);
113 m_registeredTypeNames.add(descriptor.type());
115 if (!constructorBuilder->didRegisterDefinition(definition.get())) {
116 CustomElementException::throwException(CustomElementException::ContextDestroyedRegisteringDefinition, type, exceptionState);
120 return definition.get();
123 CustomElementDefinition* CustomElementRegistry::find(const CustomElementDescriptor& descriptor) const
125 return m_definitions.get(descriptor);