third_party/WebKit/Source/core/dom/custom/CustomElementRegistry.cpp

   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
  41 namespace blink {
  42
  43 CustomElementDefinition* CustomElementRegistry::registerElement(Document* document, CustomElementConstructorBuilder* constructorBuilder, const AtomicString& userSuppliedName, CustomElement::NameSet validNames, ExceptionState& exceptionState)
  44 {
  45     AtomicString type = userSuppliedName.lower();
  46
  47     if (!constructorBuilder->isFeatureAllowed()) {
  48         CustomElementException::throwException(CustomElementException::CannotRegisterFromExtension, type, exceptionState);
  49         return 0;
  50     }
  51
  52     if (!CustomElement::isValidName(type, validNames)) {
  53         CustomElementException::throwException(CustomElementException::InvalidName, type, exceptionState);
  54         return 0;
  55     }
  56
  57     if (m_registeredTypeNames.contains(type)) {
  58         CustomElementException::throwException(CustomElementException::TypeAlreadyRegistered, type, exceptionState);
  59         return 0;
  60     }
  61
  62     QualifiedName tagName = QualifiedName::null();
  63     if (!constructorBuilder->validateOptions(type, tagName, exceptionState))
  64         return 0;
  65
  66     ASSERT(tagName.namespaceURI() == HTMLNames::xhtmlNamespaceURI || tagName.namespaceURI() == SVGNames::svgNamespaceURI);
  67
  68     ASSERT(!m_documentWasDetached);
  69
  70     RefPtrWillBeRawPtr<CustomElementLifecycleCallbacks> lifecycleCallbacks = constructorBuilder->createCallbacks();
  71
  72     // Consulting the constructor builder could execute script and
  73     // kill the document.
  74     if (m_documentWasDetached) {
  75         CustomElementException::throwException(CustomElementException::ContextDestroyedCreatingCallbacks, type, exceptionState);
  76         return 0;
  77     }
  78
  79     const CustomElementDescriptor descriptor(type, tagName.namespaceURI(), tagName.localName());
  80     RefPtrWillBeRawPtr<CustomElementDefinition> definition = CustomElementDefinition::create(descriptor, lifecycleCallbacks);
  81
  82     if (!constructorBuilder->createConstructor(document, definition.get(), exceptionState))
  83         return 0;
  84
  85     m_definitions.add(descriptor, definition);
  86     m_registeredTypeNames.add(descriptor.type());
  87
  88     if (!constructorBuilder->didRegisterDefinition(definition.get())) {
  89         CustomElementException::throwException(CustomElementException::ContextDestroyedRegisteringDefinition, type, exceptionState);
  90         return 0;
  91     }
  92
  93     return definition.get();
  94 }
  95
  96 CustomElementDefinition* CustomElementRegistry::find(const CustomElementDescriptor& descriptor) const
  97 {
  98     return m_definitions.get(descriptor);
  99 }
 100
 101 DEFINE_TRACE(CustomElementRegistry)
 102 {
 103 #if ENABLE(OILPAN)
 104     visitor->trace(m_definitions);
 105 #endif
 106 }
 107
 108 } // namespace blink