| // Copyright 2016 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| #include "cobalt/script/mozjs/wrapper_factory.h" |
| |
| #include <utility> |
| |
| #include "base/lazy_instance.h" |
| #include "cobalt/script/mozjs/mozjs_wrapper_handle.h" |
| #include "cobalt/script/mozjs/wrapper_private.h" |
| #include "third_party/mozjs/js/src/jsproxy.h" |
| |
| namespace cobalt { |
| namespace script { |
| namespace mozjs { |
| |
| void WrapperFactory::RegisterWrappableType( |
| base::TypeId wrappable_type, const CreateWrapperFunction& create_function, |
| const PrototypeClassFunction& class_function) { |
| std::pair<WrappableTypeFunctionsHashMap::iterator, bool> pib = |
| wrappable_type_functions_.insert(std::make_pair( |
| wrappable_type, |
| WrappableTypeFunctions(create_function, class_function))); |
| DCHECK(pib.second) |
| << "RegisterWrappableType registered for type more than once."; |
| } |
| |
| JSObject* WrapperFactory::GetWrapperProxy( |
| const scoped_refptr<Wrappable>& wrappable) const { |
| if (!wrappable) { |
| return NULL; |
| } |
| |
| JS::RootedObject wrapper_proxy( |
| context_, |
| MozjsWrapperHandle::GetObjectProxy(GetCachedWrapper(wrappable.get()))); |
| if (!wrapper_proxy) { |
| scoped_ptr<Wrappable::WeakWrapperHandle> object_handle = |
| CreateWrapper(wrappable); |
| SetCachedWrapper(wrappable.get(), object_handle.Pass()); |
| wrapper_proxy = |
| MozjsWrapperHandle::GetObjectProxy(GetCachedWrapper(wrappable.get())); |
| } |
| DCHECK(wrapper_proxy); |
| DCHECK(js::IsProxy(wrapper_proxy)); |
| return wrapper_proxy; |
| } |
| |
| bool WrapperFactory::HasWrapperProxy( |
| const scoped_refptr<Wrappable>& wrappable) const { |
| return wrappable && |
| !!MozjsWrapperHandle::GetObjectProxy( |
| GetCachedWrapper(wrappable.get())); |
| } |
| |
| bool WrapperFactory::IsWrapper(JS::HandleObject wrapper) const { |
| return JS_GetPrivate(wrapper) != NULL; |
| } |
| |
| scoped_ptr<Wrappable::WeakWrapperHandle> WrapperFactory::CreateWrapper( |
| const scoped_refptr<Wrappable>& wrappable) const { |
| WrappableTypeFunctionsHashMap::const_iterator it = |
| wrappable_type_functions_.find(wrappable->GetWrappableType()); |
| if (it == wrappable_type_functions_.end()) { |
| NOTREACHED(); |
| return scoped_ptr<Wrappable::WeakWrapperHandle>(); |
| } |
| JS::RootedObject new_proxy( |
| context_, it->second.create_wrapper.Run(context_, wrappable)); |
| WrapperPrivate* wrapper_private = |
| WrapperPrivate::GetFromProxyObject(context_, new_proxy); |
| DCHECK(wrapper_private); |
| return make_scoped_ptr<Wrappable::WeakWrapperHandle>( |
| new MozjsWrapperHandle(wrapper_private)); |
| } |
| |
| bool WrapperFactory::DoesObjectImplementInterface(JS::HandleObject object, |
| base::TypeId type_id) const { |
| // If the object doesn't have a wrapper private which means it is not a |
| // platform object, so the object doesn't implement the interface. |
| if (!WrapperPrivate::HasWrapperPrivate(context_, object)) { |
| return false; |
| } |
| |
| WrappableTypeFunctionsHashMap::const_iterator it = |
| wrappable_type_functions_.find(type_id); |
| if (it == wrappable_type_functions_.end()) { |
| NOTREACHED(); |
| return false; |
| } |
| const JSClass* proto_class = it->second.prototype_class.Run(context_); |
| JS::RootedObject object_proto_object(context_); |
| bool success = |
| JS_GetPrototype(context_, object, object_proto_object.address()); |
| bool equality = false; |
| while (!equality && success && object_proto_object) { |
| // Get the class of the prototype. |
| JSClass* object_proto_class = JS_GetClass(object_proto_object); |
| equality = (object_proto_class == proto_class); |
| // Get the prototype of the previous prototype. |
| success = JS_GetPrototype(context_, object_proto_object, |
| object_proto_object.address()); |
| } |
| return equality; |
| } |
| } // namespace mozjs |
| } // namespace script |
| } // namespace cobalt |