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/core/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 blink { 48 49 CustomElementRegistrationContext::CustomElementRegistrationContext() 50 : m_candidates(CustomElementUpgradeCandidateMap::create()) 51 { 52 } 53 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 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 91 void CustomElementRegistrationContext::didGiveTypeExtension(Element* element, const AtomicString& type) 92 { 93 resolveOrScheduleResolution(element, type); 94 } 95 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 } 110 111 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 } 121 122 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 } 129 130 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, element->document().convertLocalName(type)); 156 } 157 158 void CustomElementRegistrationContext::trace(Visitor* visitor) 159 { 160 visitor->trace(m_candidates); 161 } 162 163 } // namespace blink 164