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| 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 "core/dom/custom/CustomElementRegistrationContext.h" | |
| 32 | |
| 33 #include "bindings/core/v8/ExceptionState.h" | |
| 34 #include "core/HTMLNames.h" | |
| 35 #include "core/SVGNames.h" | |
| 36 #include "core/dom/Document.h" | |
| 37 #include "core/dom/Element.h" | |
| 38 #include "core/dom/custom/CustomElement.h" | |
| 39 #include "core/dom/custom/CustomElementDefinition.h" | |
| 40 #include "core/dom/custom/CustomElementScheduler.h" | |
| 41 #include "core/html/HTMLElement.h" | |
| 42 #include "core/html/HTMLUnknownElement.h" | |
| 43 #include "core/svg/SVGUnknownElement.h" | |
| 44 | |
| 45 namespace blink { | |
| 46 | |
| 47 CustomElementRegistrationContext::CustomElementRegistrationContext() | |
| 48 : m_candidates(CustomElementUpgradeCandidateMap::create()) | |
| 49 { | |
| 50 } | |
| 51 | |
| 52 void CustomElementRegistrationContext::registerElement(Document* document, Custo
mElementConstructorBuilder* constructorBuilder, const AtomicString& type, Custom
Element::NameSet validNames, ExceptionState& exceptionState) | |
| 53 { | |
| 54 CustomElementDefinition* definition = m_registry.registerElement(document, c
onstructorBuilder, type, validNames, exceptionState); | |
| 55 | |
| 56 if (!definition) | |
| 57 return; | |
| 58 | |
| 59 // Upgrade elements that were waiting for this definition. | |
| 60 CustomElementUpgradeCandidateMap::ElementSet* upgradeCandidates = m_candidat
es->takeUpgradeCandidatesFor(definition->descriptor()); | |
| 61 | |
| 62 if (!upgradeCandidates) | |
| 63 return; | |
| 64 | |
| 65 for (const auto& candidate : *upgradeCandidates) | |
| 66 CustomElement::define(candidate, definition); | |
| 67 } | |
| 68 | |
| 69 Element* CustomElementRegistrationContext::createCustomTagElement(Document& docu
ment, const QualifiedName& tagName) | |
| 70 { | |
| 71 DCHECK(CustomElement::isValidName(tagName.localName())); | |
| 72 | |
| 73 Element* element; | |
| 74 | |
| 75 if (HTMLNames::xhtmlNamespaceURI == tagName.namespaceURI()) { | |
| 76 element = HTMLElement::create(tagName, document); | |
| 77 } else if (SVGNames::svgNamespaceURI == tagName.namespaceURI()) { | |
| 78 element = SVGUnknownElement::create(tagName, document); | |
| 79 } else { | |
| 80 // XML elements are not custom elements, so return early. | |
| 81 return Element::create(tagName, &document); | |
| 82 } | |
| 83 | |
| 84 element->setCustomElementState(Element::WaitingForUpgrade); | |
| 85 resolveOrScheduleResolution(element, nullAtom); | |
| 86 return element; | |
| 87 } | |
| 88 | |
| 89 void CustomElementRegistrationContext::didGiveTypeExtension(Element* element, co
nst AtomicString& type) | |
| 90 { | |
| 91 resolveOrScheduleResolution(element, type); | |
| 92 } | |
| 93 | |
| 94 void CustomElementRegistrationContext::resolveOrScheduleResolution(Element* elem
ent, const AtomicString& typeExtension) | |
| 95 { | |
| 96 // If an element has a custom tag name it takes precedence over | |
| 97 // the "is" attribute (if any). | |
| 98 const AtomicString& type = CustomElement::isValidName(element->localName()) | |
| 99 ? element->localName() | |
| 100 : typeExtension; | |
| 101 DCHECK(!type.isNull()); | |
| 102 | |
| 103 CustomElementDescriptor descriptor(type, element->namespaceURI(), element->l
ocalName()); | |
| 104 DCHECK_EQ(element->getCustomElementState(), Element::WaitingForUpgrade); | |
| 105 | |
| 106 CustomElementScheduler::resolveOrScheduleResolution(this, element, descripto
r); | |
| 107 } | |
| 108 | |
| 109 void CustomElementRegistrationContext::resolve(Element* element, const CustomEle
mentDescriptor& descriptor) | |
| 110 { | |
| 111 CustomElementDefinition* definition = m_registry.find(descriptor); | |
| 112 if (definition) { | |
| 113 CustomElement::define(element, definition); | |
| 114 } else { | |
| 115 DCHECK_EQ(element->getCustomElementState(), Element::WaitingForUpgrade); | |
| 116 m_candidates->add(descriptor, element); | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 void CustomElementRegistrationContext::setIsAttributeAndTypeExtension(Element* e
lement, const AtomicString& type) | |
| 121 { | |
| 122 DCHECK(element); | |
| 123 DCHECK(!type.isEmpty()); | |
| 124 element->setAttribute(HTMLNames::isAttr, type); | |
| 125 setTypeExtension(element, type); | |
| 126 } | |
| 127 | |
| 128 void CustomElementRegistrationContext::setTypeExtension(Element* element, const
AtomicString& type) | |
| 129 { | |
| 130 if (!element->isHTMLElement() && !element->isSVGElement()) | |
| 131 return; | |
| 132 | |
| 133 CustomElementRegistrationContext* context = element->document().registration
Context(); | |
| 134 if (!context) | |
| 135 return; | |
| 136 | |
| 137 if (element->isCustomElement()) { | |
| 138 // This can happen if: | |
| 139 // 1. The element has a custom tag, which takes precedence over | |
| 140 // type extensions. | |
| 141 // 2. Undoing a command (eg ReplaceNodeWithSpan) recycles an | |
| 142 // element but tries to overwrite its attribute list. | |
| 143 return; | |
| 144 } | |
| 145 | |
| 146 // Custom tags take precedence over type extensions | |
| 147 DCHECK(!CustomElement::isValidName(element->localName())); | |
| 148 | |
| 149 if (!CustomElement::isValidName(type)) | |
| 150 return; | |
| 151 | |
| 152 element->setCustomElementState(Element::WaitingForUpgrade); | |
| 153 context->didGiveTypeExtension(element, element->document().convertLocalName(
type)); | |
| 154 } | |
| 155 | |
| 156 DEFINE_TRACE(CustomElementRegistrationContext) | |
| 157 { | |
| 158 visitor->trace(m_candidates); | |
| 159 visitor->trace(m_registry); | |
| 160 } | |
| 161 | |
| 162 } // namespace blink | |
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Chromium Code Reviews
Issue 1914923002:
Rename all existing custom element classes as V0 (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master