1 /*
2 * Copyright (C) 2013 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/CustomElementRegistrationContext.h"
33
34 #include "bindings/v8/ExceptionState.h"
35 #include "core/HTMLNames.h"
36 #include "core/SVGNames.h"
37 #include "core/dom/Document.h"
38 #include "core/dom/Element.h"
39 #include "core/dom/custom/CustomElement.h"
40 #include "core/dom/custom/CustomElementDefinition.h"
41 #include "core/dom/custom/CustomElementScheduler.h"
42 #include "core/html/HTMLElement.h"
43 #include "core/html/HTMLUnknownElement.h"
44 #include "core/svg/SVGUnknownElement.h"
45 #include "wtf/RefPtr.h"
46
47 namespace WebCore {
48
CustomElementRegistrationContext()49 CustomElementRegistrationContext::CustomElementRegistrationContext()
50 : m_candidates(CustomElementUpgradeCandidateMap::create())
51 {
52 }
53
registerElement(Document * document,CustomElementConstructorBuilder * constructorBuilder,const AtomicString & type,CustomElement::NameSet validNames,ExceptionState & exceptionState)54 void CustomElementRegistrationContext::registerElement(Document* document, CustomElementConstructorBuilder* constructorBuilder, const AtomicString& type, CustomElement::NameSet validNames, ExceptionState& exceptionState)
55 {
56 CustomElementDefinition* definition = m_registry.registerElement(document, constructorBuilder, type, validNames, exceptionState);
57
58 if (!definition)
59 return;
60
61 // Upgrade elements that were waiting for this definition.
62 OwnPtrWillBeRawPtr<CustomElementUpgradeCandidateMap::ElementSet> upgradeCandidates = m_candidates->takeUpgradeCandidatesFor(definition->descriptor());
63
64 if (!upgradeCandidates)
65 return;
66
67 for (CustomElementUpgradeCandidateMap::ElementSet::const_iterator it = upgradeCandidates->begin(); it != upgradeCandidates->end(); ++it)
68 CustomElement::define(*it, definition);
69 }
70
createCustomTagElement(Document & document,const QualifiedName & tagName)71 PassRefPtrWillBeRawPtr<Element> CustomElementRegistrationContext::createCustomTagElement(Document& document, const QualifiedName& tagName)
72 {
73 ASSERT(CustomElement::isValidName(tagName.localName()));
74
75 RefPtrWillBeRawPtr<Element> element;
76
77 if (HTMLNames::xhtmlNamespaceURI == tagName.namespaceURI()) {
78 element = HTMLElement::create(tagName, document);
79 } else if (SVGNames::svgNamespaceURI == tagName.namespaceURI()) {
80 element = SVGUnknownElement::create(tagName, document);
81 } else {
82 // XML elements are not custom elements, so return early.
83 return Element::create(tagName, &document);
84 }
85
86 element->setCustomElementState(Element::WaitingForUpgrade);
87 resolveOrScheduleResolution(element.get(), nullAtom);
88 return element.release();
89 }
90
didGiveTypeExtension(Element * element,const AtomicString & type)91 void CustomElementRegistrationContext::didGiveTypeExtension(Element* element, const AtomicString& type)
92 {
93 resolveOrScheduleResolution(element, type);
94 }
95
resolveOrScheduleResolution(Element * element,const AtomicString & typeExtension)96 void CustomElementRegistrationContext::resolveOrScheduleResolution(Element* element, const AtomicString& typeExtension)
97 {
98 // If an element has a custom tag name it takes precedence over
99 // the "is" attribute (if any).
100 const AtomicString& type = CustomElement::isValidName(element->localName())
101 ? element->localName()
102 : typeExtension;
103 ASSERT(!type.isNull());
104
105 CustomElementDescriptor descriptor(type, element->namespaceURI(), element->localName());
106 ASSERT(element->customElementState() == Element::WaitingForUpgrade);
107
108 CustomElementScheduler::resolveOrScheduleResolution(this, element, descriptor);
109 }
110
resolve(Element * element,const CustomElementDescriptor & descriptor)111 void CustomElementRegistrationContext::resolve(Element* element, const CustomElementDescriptor& descriptor)
112 {
113 CustomElementDefinition* definition = m_registry.find(descriptor);
114 if (definition) {
115 CustomElement::define(element, definition);
116 } else {
117 ASSERT(element->customElementState() == Element::WaitingForUpgrade);
118 m_candidates->add(descriptor, element);
119 }
120 }
121
setIsAttributeAndTypeExtension(Element * element,const AtomicString & type)122 void CustomElementRegistrationContext::setIsAttributeAndTypeExtension(Element* element, const AtomicString& type)
123 {
124 ASSERT(element);
125 ASSERT(!type.isEmpty());
126 element->setAttribute(HTMLNames::isAttr, type);
127 setTypeExtension(element, type);
128 }
129
setTypeExtension(Element * element,const AtomicString & type)130 void CustomElementRegistrationContext::setTypeExtension(Element* element, const AtomicString& type)
131 {
132 if (!element->isHTMLElement() && !element->isSVGElement())
133 return;
134
135 CustomElementRegistrationContext* context = element->document().registrationContext();
136 if (!context)
137 return;
138
139 if (element->isCustomElement()) {
140 // This can happen if:
141 // 1. The element has a custom tag, which takes precedence over
142 // type extensions.
143 // 2. Undoing a command (eg ReplaceNodeWithSpan) recycles an
144 // element but tries to overwrite its attribute list.
145 return;
146 }
147
148 // Custom tags take precedence over type extensions
149 ASSERT(!CustomElement::isValidName(element->localName()));
150
151 if (!CustomElement::isValidName(type))
152 return;
153
154 element->setCustomElementState(Element::WaitingForUpgrade);
155 context->didGiveTypeExtension(element, type);
156 }
157
trace(Visitor * visitor)158 void CustomElementRegistrationContext::trace(Visitor* visitor)
159 {
160 visitor->trace(m_candidates);
161 }
162
163 } // namespace WebCore
164