| /* |
| * Copyright (C) 2012 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/CustomElementHelpers.h" |
| |
| #include "V8HTMLElementWrapperFactory.h" |
| #include "V8SVGElementWrapperFactory.h" |
| #include "bindings/v8/DOMWrapperWorld.h" |
| #include "bindings/v8/V8PerContextData.h" |
| #include "core/dom/CustomElementRegistry.h" |
| #include "core/html/HTMLElement.h" |
| #include "core/html/HTMLUnknownElement.h" |
| #include "core/svg/SVGElement.h" |
| |
| namespace WebCore { |
| |
| v8::Handle<v8::Object> CustomElementHelpers::createWrapper(PassRefPtr<Element> impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate, const CreateWrapperFunction& createTypeExtensionUpgradeCandidateWrapper) |
| { |
| ASSERT(impl); |
| |
| // FIXME: creationContext.IsEmpty() should never happen. Remove |
| // this when callers (like InspectorController::inspect) are fixed |
| // to never pass an empty creation context. |
| v8::Handle<v8::Context> context = creationContext.IsEmpty() ? isolate->GetCurrentContext() : creationContext->CreationContext(); |
| |
| // The constructor and registered lifecycle callbacks should be visible only from main world. |
| // FIXME: This shouldn't be needed once each custom element has its own FunctionTemplate |
| // https://bugs.webkit.org/show_bug.cgi?id=108138 |
| if (!CustomElementHelpers::isFeatureAllowed(context)) { |
| v8::Handle<v8::Object> wrapper = V8DOMWrapper::createWrapper(creationContext, &V8HTMLElement::info, impl.get(), isolate); |
| if (!wrapper.IsEmpty()) |
| V8DOMWrapper::associateObjectWithWrapper(impl, &V8HTMLElement::info, wrapper, isolate, WrapperConfiguration::Dependent); |
| return wrapper; |
| } |
| |
| CustomElementRegistry* registry = impl->document()->registry(); |
| RefPtr<CustomElementDefinition> definition = registry->findFor(impl.get()); |
| if (!definition) |
| return createUpgradeCandidateWrapper(impl, creationContext, isolate, createTypeExtensionUpgradeCandidateWrapper); |
| |
| V8PerContextData* perContextData = V8PerContextData::from(context); |
| if (!perContextData) |
| return v8::Handle<v8::Object>(); |
| |
| v8::Handle<v8::Object> prototype = perContextData->customElementPrototypes()->get(definition->type()).newLocal(isolate); |
| WrapperTypeInfo* typeInfo = CustomElementHelpers::findWrapperType(prototype); |
| if (!typeInfo) { |
| // FIXME: When can this happen? |
| return v8::Handle<v8::Object>(); |
| } |
| |
| v8::Handle<v8::Object> wrapper = V8DOMWrapper::createWrapper(creationContext, typeInfo, impl.get(), isolate); |
| if (wrapper.IsEmpty()) |
| return v8::Handle<v8::Object>(); |
| |
| wrapper->SetPrototype(prototype); |
| |
| V8DOMWrapper::associateObjectWithWrapper(impl, typeInfo, wrapper, isolate, WrapperConfiguration::Dependent); |
| return wrapper; |
| } |
| |
| v8::Handle<v8::Object> CustomElementHelpers::CreateWrapperFunction::invoke(Element* element, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate) const |
| { |
| if (element->isHTMLElement()) { |
| if (m_html) |
| return m_html(toHTMLElement(element), creationContext, isolate); |
| return createV8HTMLFallbackWrapper(toHTMLUnknownElement(toHTMLElement(element)), creationContext, isolate); |
| } else if (element->isSVGElement()) { |
| if (m_svg) |
| return m_svg(toSVGElement(element), creationContext, isolate); |
| return createV8SVGFallbackWrapper(toSVGElement(element), creationContext, isolate); |
| } |
| |
| ASSERT(0); |
| return v8::Handle<v8::Object>(); |
| } |
| |
| v8::Handle<v8::Object> CustomElementHelpers::createUpgradeCandidateWrapper(PassRefPtr<Element> element, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate, const CreateWrapperFunction& createTypeExtensionUpgradeCandidateWrapper) |
| { |
| if (CustomElementRegistry::isCustomTagName(element->localName())) { |
| if (element->isHTMLElement()) |
| return createV8HTMLDirectWrapper(toHTMLElement(element.get()), creationContext, isolate); |
| else if (element->isSVGElement()) |
| return createV8SVGDirectWrapper(toSVGElement(element.get()), creationContext, isolate); |
| else { |
| ASSERT(0); |
| return v8::Handle<v8::Object>(); |
| } |
| } else { |
| // It's a type extension |
| return createTypeExtensionUpgradeCandidateWrapper.invoke(element.get(), creationContext, isolate); |
| } |
| } |
| |
| bool CustomElementHelpers::isFeatureAllowed(v8::Handle<v8::Context> context) |
| { |
| if (DOMWrapperWorld* world = DOMWrapperWorld::isolatedWorld(context)) |
| return world->isMainWorld(); |
| return true; |
| } |
| |
| WrapperTypeInfo* CustomElementHelpers::findWrapperType(v8::Handle<v8::Value> chain) |
| { |
| while (!chain.IsEmpty() && chain->IsObject()) { |
| v8::Handle<v8::Object> chainObject = v8::Handle<v8::Object>::Cast(chain); |
| // Only prototype objects of native-backed types have the extra internal field storing WrapperTypeInfo. |
| if (v8PrototypeInternalFieldcount == chainObject->InternalFieldCount()) |
| return reinterpret_cast<WrapperTypeInfo*>(chainObject->GetAlignedPointerFromInternalField(v8PrototypeTypeIndex)); |
| chain = chainObject->GetPrototype(); |
| } |
| |
| return 0; |
| } |
| |
| } // namespace WebCore |