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 "HTMLNames.h"
35 #include "SVGNames.h"
36 #include "bindings/v8/CustomElementConstructorBuilder.h"
37 #include "core/dom/DocumentLifecycleObserver.h"
38 #include "core/dom/custom/CustomElementException.h"
39 #include "core/dom/custom/CustomElementRegistrationContext.h"
40
41 namespace WebCore {
42
43 class RegistrationContextObserver : public DocumentLifecycleObserver {
44 public:
RegistrationContextObserver(Document * document)45 explicit RegistrationContextObserver(Document* document)
46 : DocumentLifecycleObserver(document)
47 , m_wentAway(!document)
48 {
49 }
50
registrationContextWentAway()51 bool registrationContextWentAway() { return m_wentAway; }
52
53 private:
documentWasDisposed()54 virtual void documentWasDisposed() OVERRIDE { m_wentAway = true; }
55
56 bool m_wentAway;
57 };
58
registerElement(Document * document,CustomElementConstructorBuilder * constructorBuilder,const AtomicString & userSuppliedName,CustomElement::NameSet validNames,ExceptionState & exceptionState)59 CustomElementDefinition* CustomElementRegistry::registerElement(Document* document, CustomElementConstructorBuilder* constructorBuilder, const AtomicString& userSuppliedName, CustomElement::NameSet validNames, ExceptionState& exceptionState)
60 {
61 // FIXME: In every instance except one it is the
62 // CustomElementConstructorBuilder that observes document
63 // destruction during registration. This responsibility should be
64 // consolidated in one place.
65 RegistrationContextObserver observer(document);
66
67 AtomicString type = userSuppliedName.lower();
68
69 if (!constructorBuilder->isFeatureAllowed()) {
70 CustomElementException::throwException(CustomElementException::CannotRegisterFromExtension, type, exceptionState);
71 return 0;
72 }
73
74 if (!CustomElement::isValidName(type, validNames)) {
75 CustomElementException::throwException(CustomElementException::InvalidName, type, exceptionState);
76 return 0;
77 }
78
79 QualifiedName tagName = nullQName();
80 if (!constructorBuilder->validateOptions(type, tagName, exceptionState))
81 return 0;
82
83 ASSERT(tagName.namespaceURI() == HTMLNames::xhtmlNamespaceURI || tagName.namespaceURI() == SVGNames::svgNamespaceURI);
84
85 // FIXME: This should be done earlier in validateOptions.
86 if (m_registeredTypeNames.contains(type)) {
87 CustomElementException::throwException(CustomElementException::TypeAlreadyRegistered, type, exceptionState);
88 return 0;
89 }
90
91 ASSERT(!observer.registrationContextWentAway());
92
93 RefPtr<CustomElementLifecycleCallbacks> lifecycleCallbacks = constructorBuilder->createCallbacks();
94
95 // Consulting the constructor builder could execute script and
96 // kill the document.
97 if (observer.registrationContextWentAway()) {
98 CustomElementException::throwException(CustomElementException::ContextDestroyedCreatingCallbacks, type, exceptionState);
99 return 0;
100 }
101
102 const CustomElementDescriptor descriptor(type, tagName.namespaceURI(), tagName.localName());
103 RefPtr<CustomElementDefinition> definition = CustomElementDefinition::create(descriptor, lifecycleCallbacks);
104
105 if (!constructorBuilder->createConstructor(document, definition.get(), exceptionState))
106 return 0;
107
108 m_definitions.add(descriptor, definition);
109 m_registeredTypeNames.add(descriptor.type());
110
111 if (!constructorBuilder->didRegisterDefinition(definition.get())) {
112 CustomElementException::throwException(CustomElementException::ContextDestroyedRegisteringDefinition, type, exceptionState);
113 return 0;
114 }
115
116 return definition.get();
117 }
118
find(const CustomElementDescriptor & descriptor) const119 CustomElementDefinition* CustomElementRegistry::find(const CustomElementDescriptor& descriptor) const
120 {
121 return m_definitions.get(descriptor);
122 }
123
124 } // namespace WebCore
125