| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "bindings/v8/CustomElementConstructorBuilder.h" |
| |
| #include "HTMLNames.h" |
| #include "SVGNames.h" |
| #include "V8Document.h" |
| #include "V8HTMLElementWrapperFactory.h" |
| #include "V8SVGElementWrapperFactory.h" |
| #include "bindings/v8/CustomElementBinding.h" |
| #include "bindings/v8/DOMWrapperWorld.h" |
| #include "bindings/v8/Dictionary.h" |
| #include "bindings/v8/ExceptionState.h" |
| #include "bindings/v8/ScriptState.h" |
| #include "bindings/v8/UnsafePersistent.h" |
| #include "bindings/v8/V8Binding.h" |
| #include "bindings/v8/V8HiddenPropertyName.h" |
| #include "bindings/v8/V8PerContextData.h" |
| #include "core/dom/Document.h" |
| #include "core/dom/custom/CustomElementCallbackDispatcher.h" |
| #include "core/dom/custom/CustomElementDefinition.h" |
| #include "core/dom/custom/CustomElementDescriptor.h" |
| #include "core/dom/custom/CustomElementException.h" |
| #include "wtf/Assertions.h" |
| |
| namespace WebCore { |
| |
| static void constructCustomElement(const v8::FunctionCallbackInfo<v8::Value>&); |
| |
| CustomElementConstructorBuilder::CustomElementConstructorBuilder(ScriptState* state, const Dictionary* options) |
| : m_context(state->context()) |
| , m_options(options) |
| , m_wrapperType(0) |
| { |
| ASSERT(m_context == v8::Isolate::GetCurrent()->GetCurrentContext()); |
| } |
| |
| bool CustomElementConstructorBuilder::isFeatureAllowed() const |
| { |
| // Check that we are in the main world |
| return !DOMWrapperWorld::isolatedWorld(m_context); |
| } |
| |
| bool CustomElementConstructorBuilder::validateOptions(const AtomicString& type, QualifiedName& tagName, ExceptionState& exceptionState) |
| { |
| ASSERT(m_prototype.IsEmpty()); |
| |
| ScriptValue prototypeScriptValue; |
| if (m_options->get("prototype", prototypeScriptValue) && !prototypeScriptValue.isNull()) { |
| m_prototype = prototypeScriptValue.v8Value().As<v8::Object>(); |
| if (m_prototype.IsEmpty()) { |
| CustomElementException::throwException(CustomElementException::PrototypeNotAnObject, type, exceptionState); |
| return false; |
| } |
| } else { |
| m_prototype = v8::Object::New(); |
| v8::Local<v8::Object> basePrototype = V8PerContextData::from(m_context)->prototypeForType(&V8HTMLElement::wrapperTypeInfo); |
| if (!basePrototype.IsEmpty()) |
| m_prototype->SetPrototype(basePrototype); |
| } |
| |
| String extends; |
| bool extendsProvidedAndNonNull = m_options->get("extends", extends); |
| |
| if (!V8PerContextData::from(m_context)) { |
| // FIXME: This should generate an InvalidContext exception at a later point. |
| CustomElementException::throwException(CustomElementException::ContextDestroyedCheckingPrototype, type, exceptionState); |
| return false; |
| } |
| |
| AtomicString namespaceURI = HTMLNames::xhtmlNamespaceURI; |
| if (hasValidPrototypeChainFor(&V8SVGElement::wrapperTypeInfo)) |
| namespaceURI = SVGNames::svgNamespaceURI; |
| |
| AtomicString localName; |
| |
| if (extendsProvidedAndNonNull) { |
| localName = extends.lower(); |
| |
| if (!Document::isValidName(localName)) { |
| CustomElementException::throwException(CustomElementException::ExtendsIsInvalidName, type, exceptionState); |
| return false; |
| } |
| if (CustomElement::isValidName(localName)) { |
| CustomElementException::throwException(CustomElementException::ExtendsIsCustomElementName, type, exceptionState); |
| return false; |
| } |
| } else { |
| localName = type; |
| } |
| |
| if (!extendsProvidedAndNonNull) |
| m_wrapperType = &V8HTMLElement::wrapperTypeInfo; |
| else if (namespaceURI == HTMLNames::xhtmlNamespaceURI) |
| m_wrapperType = findWrapperTypeForHTMLTagName(localName); |
| else |
| m_wrapperType = findWrapperTypeForSVGTagName(localName); |
| |
| ASSERT(m_wrapperType); |
| tagName = QualifiedName(nullAtom, localName, namespaceURI); |
| return m_wrapperType; |
| } |
| |
| PassRefPtr<CustomElementLifecycleCallbacks> CustomElementConstructorBuilder::createCallbacks() |
| { |
| ASSERT(!m_prototype.IsEmpty()); |
| |
| RefPtr<ExecutionContext> executionContext(toExecutionContext(m_context)); |
| |
| v8::TryCatch exceptionCatcher; |
| exceptionCatcher.SetVerbose(true); |
| |
| v8::Isolate* isolate = v8::Isolate::GetCurrent(); |
| v8::Handle<v8::Function> created = retrieveCallback(isolate, "createdCallback"); |
| v8::Handle<v8::Function> enteredView = retrieveCallback(isolate, "enteredViewCallback"); |
| v8::Handle<v8::Function> leftView = retrieveCallback(isolate, "leftViewCallback"); |
| v8::Handle<v8::Function> attributeChanged = retrieveCallback(isolate, "attributeChangedCallback"); |
| |
| m_callbacks = V8CustomElementLifecycleCallbacks::create(executionContext.get(), m_prototype, created, enteredView, leftView, attributeChanged); |
| return m_callbacks.get(); |
| } |
| |
| v8::Handle<v8::Function> CustomElementConstructorBuilder::retrieveCallback(v8::Isolate* isolate, const char* name) |
| { |
| v8::Handle<v8::Value> value = m_prototype->Get(v8String(name, isolate)); |
| if (value.IsEmpty() || !value->IsFunction()) |
| return v8::Handle<v8::Function>(); |
| return value.As<v8::Function>(); |
| } |
| |
| bool CustomElementConstructorBuilder::createConstructor(Document* document, CustomElementDefinition* definition, ExceptionState& exceptionState) |
| { |
| ASSERT(!m_prototype.IsEmpty()); |
| ASSERT(m_constructor.IsEmpty()); |
| ASSERT(document); |
| |
| v8::Isolate* isolate = m_context->GetIsolate(); |
| |
| if (!prototypeIsValid(definition->descriptor().type(), exceptionState)) |
| return false; |
| |
| v8::Local<v8::FunctionTemplate> constructorTemplate = v8::FunctionTemplate::New(); |
| constructorTemplate->SetCallHandler(constructCustomElement); |
| m_constructor = constructorTemplate->GetFunction(); |
| if (m_constructor.IsEmpty()) { |
| CustomElementException::throwException(CustomElementException::ContextDestroyedRegisteringDefinition, definition->descriptor().type(), exceptionState); |
| return false; |
| } |
| |
| const CustomElementDescriptor& descriptor = definition->descriptor(); |
| |
| v8::Handle<v8::String> v8TagName = v8String(descriptor.localName(), isolate); |
| v8::Handle<v8::Value> v8Type; |
| if (descriptor.isTypeExtension()) |
| v8Type = v8String(descriptor.type(), isolate); |
| else |
| v8Type = v8::Null(isolate); |
| |
| m_constructor->SetName(v8Type->IsNull() ? v8TagName : v8Type.As<v8::String>()); |
| |
| V8HiddenPropertyName::setNamedHiddenReference(m_constructor, "customElementDocument", toV8(document, m_context->Global(), isolate)); |
| V8HiddenPropertyName::setNamedHiddenReference(m_constructor, "customElementNamespaceURI", v8String(descriptor.namespaceURI(), isolate)); |
| V8HiddenPropertyName::setNamedHiddenReference(m_constructor, "customElementTagName", v8TagName); |
| V8HiddenPropertyName::setNamedHiddenReference(m_constructor, "customElementType", v8Type); |
| |
| v8::Handle<v8::String> prototypeKey = v8String("prototype", isolate); |
| ASSERT(m_constructor->HasOwnProperty(prototypeKey)); |
| // This sets the property *value*; calling Set is safe because |
| // "prototype" is a non-configurable data property so there can be |
| // no side effects. |
| m_constructor->Set(prototypeKey, m_prototype); |
| // This *configures* the property. ForceSet of a function's |
| // "prototype" does not affect the value, but can reconfigure the |
| // property. |
| m_constructor->ForceSet(prototypeKey, m_prototype, v8::PropertyAttribute(v8::ReadOnly | v8::DontEnum | v8::DontDelete)); |
| |
| V8HiddenPropertyName::setNamedHiddenReference(m_prototype, "customElementIsInterfacePrototypeObject", v8::True(isolate)); |
| m_prototype->ForceSet(v8String("constructor", isolate), m_constructor, v8::DontEnum); |
| |
| return true; |
| } |
| |
| bool CustomElementConstructorBuilder::prototypeIsValid(const AtomicString& type, ExceptionState& exceptionState) const |
| { |
| if (m_prototype->InternalFieldCount() || !m_prototype->GetHiddenValue(V8HiddenPropertyName::customElementIsInterfacePrototypeObject(m_context->GetIsolate())).IsEmpty()) { |
| CustomElementException::throwException(CustomElementException::PrototypeInUse, type, exceptionState); |
| return false; |
| } |
| |
| if (m_prototype->GetPropertyAttributes(v8String("constructor", m_context->GetIsolate())) & v8::DontDelete) { |
| CustomElementException::throwException(CustomElementException::ConstructorPropertyNotConfigurable, type, exceptionState); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool CustomElementConstructorBuilder::didRegisterDefinition(CustomElementDefinition* definition) const |
| { |
| ASSERT(!m_constructor.IsEmpty()); |
| |
| return m_callbacks->setBinding(definition, CustomElementBinding::create(m_context->GetIsolate(), m_prototype, m_wrapperType)); |
| } |
| |
| ScriptValue CustomElementConstructorBuilder::bindingsReturnValue() const |
| { |
| return ScriptValue(m_constructor, m_context->GetIsolate()); |
| } |
| |
| bool CustomElementConstructorBuilder::hasValidPrototypeChainFor(const WrapperTypeInfo* type) const |
| { |
| v8::Handle<v8::Object> elementPrototype = V8PerContextData::from(m_context)->prototypeForType(type); |
| if (elementPrototype.IsEmpty()) |
| return false; |
| |
| v8::Handle<v8::Value> chain = m_prototype; |
| while (!chain.IsEmpty() && chain->IsObject()) { |
| if (chain == elementPrototype) |
| return true; |
| chain = chain.As<v8::Object>()->GetPrototype(); |
| } |
| |
| return false; |
| } |
| |
| static void constructCustomElement(const v8::FunctionCallbackInfo<v8::Value>& info) |
| { |
| v8::Isolate* isolate = info.GetIsolate(); |
| |
| if (!info.IsConstructCall()) { |
| throwTypeError("DOM object constructor cannot be called as a function.", isolate); |
| return; |
| } |
| |
| if (info.Length() > 0) { |
| throwUninformativeAndGenericTypeError(isolate); |
| return; |
| } |
| |
| Document* document = V8Document::toNative(info.Callee()->GetHiddenValue(V8HiddenPropertyName::customElementDocument(isolate)).As<v8::Object>()); |
| V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, namespaceURI, info.Callee()->GetHiddenValue(V8HiddenPropertyName::customElementNamespaceURI(isolate))); |
| V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, tagName, info.Callee()->GetHiddenValue(V8HiddenPropertyName::customElementTagName(isolate))); |
| v8::Handle<v8::Value> maybeType = info.Callee()->GetHiddenValue(V8HiddenPropertyName::customElementType(isolate)); |
| V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, type, maybeType); |
| |
| ExceptionState exceptionState(info.Holder(), info.GetIsolate()); |
| CustomElementCallbackDispatcher::CallbackDeliveryScope deliveryScope; |
| RefPtr<Element> element = document->createElementNS(namespaceURI, tagName, maybeType->IsNull() ? nullAtom : type, exceptionState); |
| if (exceptionState.throwIfNeeded()) |
| return; |
| v8SetReturnValueFast(info, element.release(), document); |
| } |
| |
| } // namespace WebCore |