1/* 2 * Copyright (C) 2012 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * 3. Neither the name of Google Inc. nor the names of its contributors 15 * may be used to endorse or promote products derived from this 16 * software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include "config.h" 32#include "core/dom/custom/CustomElementRegistry.h" 33 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" 40 41namespace blink { 42 43class RegistrationContextObserver : public DocumentLifecycleObserver { 44public: 45 explicit RegistrationContextObserver(Document* document) 46 : DocumentLifecycleObserver(document) 47 , m_wentAway(!document) 48 { 49 } 50 51 bool registrationContextWentAway() { return m_wentAway; } 52 53private: 54#if ENABLE(OILPAN) 55 // In oilpan we don't have the disposed phase for context lifecycle observer. 56 virtual void documentWasDetached() OVERRIDE { m_wentAway = true; } 57#else 58 virtual void documentWasDisposed() OVERRIDE { m_wentAway = true; } 59#endif 60 61 bool m_wentAway; 62}; 63 64CustomElementDefinition* CustomElementRegistry::registerElement(Document* document, CustomElementConstructorBuilder* constructorBuilder, const AtomicString& userSuppliedName, CustomElement::NameSet validNames, ExceptionState& exceptionState) 65{ 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); 71 72 AtomicString type = userSuppliedName.lower(); 73 74 if (!constructorBuilder->isFeatureAllowed()) { 75 CustomElementException::throwException(CustomElementException::CannotRegisterFromExtension, type, exceptionState); 76 return 0; 77 } 78 79 if (!CustomElement::isValidName(type, validNames)) { 80 CustomElementException::throwException(CustomElementException::InvalidName, type, exceptionState); 81 return 0; 82 } 83 84 if (m_registeredTypeNames.contains(type)) { 85 CustomElementException::throwException(CustomElementException::TypeAlreadyRegistered, type, exceptionState); 86 return 0; 87 } 88 89 QualifiedName tagName = QualifiedName::null(); 90 if (!constructorBuilder->validateOptions(type, tagName, exceptionState)) 91 return 0; 92 93 ASSERT(tagName.namespaceURI() == HTMLNames::xhtmlNamespaceURI || tagName.namespaceURI() == SVGNames::svgNamespaceURI); 94 95 ASSERT(!observer.registrationContextWentAway()); 96 97 RefPtr<CustomElementLifecycleCallbacks> lifecycleCallbacks = constructorBuilder->createCallbacks(); 98 99 // Consulting the constructor builder could execute script and 100 // kill the document. 101 if (observer.registrationContextWentAway()) { 102 CustomElementException::throwException(CustomElementException::ContextDestroyedCreatingCallbacks, type, exceptionState); 103 return 0; 104 } 105 106 const CustomElementDescriptor descriptor(type, tagName.namespaceURI(), tagName.localName()); 107 RefPtr<CustomElementDefinition> definition = CustomElementDefinition::create(descriptor, lifecycleCallbacks); 108 109 if (!constructorBuilder->createConstructor(document, definition.get(), exceptionState)) 110 return 0; 111 112 m_definitions.add(descriptor, definition); 113 m_registeredTypeNames.add(descriptor.type()); 114 115 if (!constructorBuilder->didRegisterDefinition(definition.get())) { 116 CustomElementException::throwException(CustomElementException::ContextDestroyedRegisteringDefinition, type, exceptionState); 117 return 0; 118 } 119 120 return definition.get(); 121} 122 123CustomElementDefinition* CustomElementRegistry::find(const CustomElementDescriptor& descriptor) const 124{ 125 return m_definitions.get(descriptor); 126} 127 128} // namespace blink 129