| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "extensions/renderer/api_bindings_system.h" |
| |
| #include "base/bind.h" |
| #include "base/memory/ptr_util.h" |
| #include "base/values.h" |
| #include "extensions/renderer/api_binding_hooks.h" |
| |
| namespace extensions { |
| |
| APIBindingsSystem::APIBindingsSystem( |
| const binding::RunJSFunction& call_js, |
| const binding::RunJSFunctionSync& call_js_sync, |
| const GetAPISchemaMethod& get_api_schema, |
| const APIRequestHandler::SendRequestMethod& send_request, |
| const APIEventHandler::EventListenersChangedMethod& event_listeners_changed, |
| APILastError last_error) |
| : type_reference_map_(base::Bind(&APIBindingsSystem::InitializeType, |
| base::Unretained(this))), |
| request_handler_(send_request, call_js, std::move(last_error)), |
| event_handler_(call_js, event_listeners_changed), |
| call_js_(call_js), |
| call_js_sync_(call_js_sync), |
| get_api_schema_(get_api_schema) {} |
| |
| APIBindingsSystem::~APIBindingsSystem() {} |
| |
| v8::Local<v8::Object> APIBindingsSystem::CreateAPIInstance( |
| const std::string& api_name, |
| v8::Local<v8::Context> context, |
| v8::Isolate* isolate, |
| const APIBinding::AvailabilityCallback& is_available, |
| APIBindingHooks** hooks_out) { |
| std::unique_ptr<APIBinding>& binding = api_bindings_[api_name]; |
| if (!binding) |
| binding = CreateNewAPIBinding(api_name); |
| if (hooks_out) |
| *hooks_out = binding->hooks(); |
| return binding->CreateInstance(context, isolate, is_available); |
| } |
| |
| std::unique_ptr<APIBinding> APIBindingsSystem::CreateNewAPIBinding( |
| const std::string& api_name) { |
| const base::DictionaryValue& api_schema = get_api_schema_.Run(api_name); |
| |
| const base::ListValue* function_definitions = nullptr; |
| api_schema.GetList("functions", &function_definitions); |
| const base::ListValue* type_definitions = nullptr; |
| api_schema.GetList("types", &type_definitions); |
| const base::ListValue* event_definitions = nullptr; |
| api_schema.GetList("events", &event_definitions); |
| const base::DictionaryValue* property_definitions = nullptr; |
| api_schema.GetDictionary("properties", &property_definitions); |
| |
| // Find the hooks for the API. If none exist, an empty set will be created so |
| // we can use JS custom bindings. |
| // TODO(devlin): Once all legacy custom bindings are converted, we don't have |
| // to unconditionally pass in binding hooks. |
| std::unique_ptr<APIBindingHooks> hooks; |
| auto iter = binding_hooks_.find(api_name); |
| if (iter != binding_hooks_.end()) { |
| hooks = std::move(iter->second); |
| binding_hooks_.erase(iter); |
| } else { |
| hooks = base::MakeUnique<APIBindingHooks>(api_name, call_js_sync_); |
| } |
| |
| return base::MakeUnique<APIBinding>( |
| api_name, function_definitions, type_definitions, event_definitions, |
| property_definitions, |
| base::Bind(&APIBindingsSystem::CreateCustomType, base::Unretained(this)), |
| std::move(hooks), &type_reference_map_, &request_handler_, |
| &event_handler_); |
| } |
| |
| void APIBindingsSystem::InitializeType(const std::string& type_name) { |
| // In order to initialize the type, we just initialize the full binding. This |
| // seems like a lot of work, but in practice, trying to extract out only the |
| // types from the schema, and then update the reference map based on that, is |
| // close enough to the same cost. Additionally, this happens lazily on API |
| // use, and relatively few APIs specify types from another API. Finally, this |
| // will also go away if/when we generate all these specifications. |
| std::string::size_type dot = type_name.rfind('.'); |
| // The type name should be fully qualified (include the API name). |
| DCHECK_NE(std::string::npos, dot); |
| DCHECK_LT(dot, type_name.size() - 1); |
| std::string api_name = type_name.substr(0, dot); |
| // If we've already instantiated the binding, the type should have been in |
| // there. |
| DCHECK(api_bindings_.find(api_name) == api_bindings_.end()); |
| |
| api_bindings_[api_name] = CreateNewAPIBinding(api_name); |
| } |
| |
| void APIBindingsSystem::CompleteRequest(int request_id, |
| const base::ListValue& response, |
| const std::string& error) { |
| request_handler_.CompleteRequest(request_id, response, error); |
| } |
| |
| void APIBindingsSystem::FireEventInContext(const std::string& event_name, |
| v8::Local<v8::Context> context, |
| const base::ListValue& response) { |
| event_handler_.FireEventInContext(event_name, context, response); |
| } |
| |
| APIBindingHooks* APIBindingsSystem::GetHooksForAPI( |
| const std::string& api_name) { |
| DCHECK(api_bindings_.empty()) |
| << "Hook registration must happen before creating any binding instances."; |
| std::unique_ptr<APIBindingHooks>& hooks = binding_hooks_[api_name]; |
| if (!hooks) |
| hooks = base::MakeUnique<APIBindingHooks>(api_name, call_js_sync_); |
| return hooks.get(); |
| } |
| |
| void APIBindingsSystem::RegisterCustomType(const std::string& type_name, |
| const CustomTypeHandler& function) { |
| DCHECK(custom_types_.find(type_name) == custom_types_.end()) |
| << "Custom type already registered: " << type_name; |
| custom_types_[type_name] = function; |
| } |
| |
| v8::Local<v8::Object> APIBindingsSystem::CreateCustomType( |
| v8::Local<v8::Context> context, |
| const std::string& type_name, |
| const std::string& property_name) { |
| auto iter = custom_types_.find(type_name); |
| DCHECK(iter != custom_types_.end()) << "Custom type not found: " << type_name; |
| return iter->second.Run(context, property_name, &request_handler_, |
| &event_handler_, &type_reference_map_); |
| } |
| |
| } // namespace extensions |