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// Copyright (c) 2012 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 "chromeos/dbus/ibus/ibus_engine_factory_service.h"
#include <map>
#include <string>
#include "base/strings/string_number_conversions.h"
#include "chromeos/dbus/ibus/ibus_constants.h"
#include "chromeos/ime/ibus_bridge.h"
#include "dbus/bus.h"
#include "dbus/exported_object.h"
#include "dbus/message.h"
namespace chromeos {
namespace {
const char* kObjectPathPrefix = "/org/freedesktop/IBus/Engine/";
} // namespace
class IBusEngineFactoryServiceImpl : public IBusEngineFactoryService {
public:
explicit IBusEngineFactoryServiceImpl(dbus::Bus* bus)
: bus_(bus),
object_path_id_(0),
weak_ptr_factory_(this) {
exported_object_ = bus_->GetExportedObject(
dbus::ObjectPath(ibus::engine_factory::kServicePath));
exported_object_->ExportMethod(
ibus::engine_factory::kServiceInterface,
ibus::engine_factory::kCreateEngineMethod,
base::Bind(&IBusEngineFactoryServiceImpl::CreateEngine,
weak_ptr_factory_.GetWeakPtr()),
base::Bind(&IBusEngineFactoryServiceImpl::CreateEngineExported,
weak_ptr_factory_.GetWeakPtr()));
}
virtual ~IBusEngineFactoryServiceImpl() {
bus_->UnregisterExportedObject(dbus::ObjectPath(
ibus::engine_factory::kServicePath));
}
// IBusEngineFactoryService override.
virtual void SetCreateEngineHandler(
const std::string& engine_id,
const CreateEngineHandler& create_engine_handler) OVERRIDE {
DCHECK(create_engine_callback_map_[engine_id].is_null());
create_engine_callback_map_[engine_id] = create_engine_handler;
}
// IBusEngineFactoryService override.
virtual void UnsetCreateEngineHandler(
const std::string& engine_id) OVERRIDE {
create_engine_callback_map_[engine_id].Reset();
}
// IBusEngineFactoryService override.
virtual dbus::ObjectPath GenerateUniqueObjectPath() OVERRIDE {
return dbus::ObjectPath(kObjectPathPrefix +
base::IntToString(object_path_id_++));
}
private:
// Called when the ibus-daemon requires new engine instance.
void CreateEngine(dbus::MethodCall* method_call,
dbus::ExportedObject::ResponseSender response_sender) {
if (!method_call) {
LOG(ERROR) << "method call does not have any arguments.";
return;
}
dbus::MessageReader reader(method_call);
std::string engine_name;
if (!reader.PopString(&engine_name)) {
LOG(ERROR) << "Expected argument is string.";
return;
}
if (create_engine_callback_map_[engine_name].is_null()) {
LOG(WARNING) << "The CreateEngine handler for " << engine_name
<< " is NULL.";
} else {
create_engine_callback_map_[engine_name].Run(
base::Bind(&IBusEngineFactoryServiceImpl::CreateEngineSendReply,
weak_ptr_factory_.GetWeakPtr(),
base::Passed(dbus::Response::FromMethodCall(method_call)),
response_sender));
}
}
// Sends reply message for CreateEngine method call.
void CreateEngineSendReply(
scoped_ptr<dbus::Response> response,
const dbus::ExportedObject::ResponseSender response_sender,
const dbus::ObjectPath& path) {
dbus::MessageWriter writer(response.get());
writer.AppendObjectPath(path);
response_sender.Run(response.Pass());
}
// Called when the CreateEngine method is exported.
void CreateEngineExported(const std::string& interface_name,
const std::string& method_name,
bool success) {
DCHECK(success) << "Failed to export: "
<< interface_name << "." << method_name;
}
// CreateEngine method call handler.
std::map<std::string, CreateEngineHandler> create_engine_callback_map_;
dbus::Bus* bus_;
scoped_refptr<dbus::ExportedObject> exported_object_;
uint32 object_path_id_;
base::WeakPtrFactory<IBusEngineFactoryServiceImpl> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(IBusEngineFactoryServiceImpl);
};
// An implementation of IBusEngineFactoryService without ibus-daemon
// interaction. Currently this class is used only on linux desktop.
// TODO(nona): Use this on ChromeOS device once crbug.com/171351 is fixed.
class IBusEngineFactoryServiceDaemonlessImpl : public IBusEngineFactoryService {
public:
IBusEngineFactoryServiceDaemonlessImpl()
: object_path_id_(0) {}
virtual ~IBusEngineFactoryServiceDaemonlessImpl() {}
// IBusEngineFactoryService override.
virtual void SetCreateEngineHandler(
const std::string& engine_id,
const CreateEngineHandler& create_engine_handler) OVERRIDE {
IBusBridge::Get()->SetCreateEngineHandler(engine_id, create_engine_handler);
}
// IBusEngineFactoryService override.
virtual void UnsetCreateEngineHandler(
const std::string& engine_id) OVERRIDE {
IBusBridge::Get()->UnsetCreateEngineHandler(engine_id);
}
// IBusEngineFactoryService override.
virtual dbus::ObjectPath GenerateUniqueObjectPath() OVERRIDE {
// ObjectPath is not used in non-ibus-daemon implementation. Passing dummy
// valid and unique dummy object path.
return dbus::ObjectPath("/dummy/object/path" +
base::IntToString(object_path_id_++));
}
private:
uint32 object_path_id_;
DISALLOW_COPY_AND_ASSIGN(IBusEngineFactoryServiceDaemonlessImpl);
};
IBusEngineFactoryService::IBusEngineFactoryService() {
}
IBusEngineFactoryService::~IBusEngineFactoryService() {
}
// static
IBusEngineFactoryService* IBusEngineFactoryService::Create(
dbus::Bus* bus,
DBusClientImplementationType type) {
if (type == REAL_DBUS_CLIENT_IMPLEMENTATION)
return new IBusEngineFactoryServiceImpl(bus);
else
return new IBusEngineFactoryServiceDaemonlessImpl();
}
} // namespace chromeos
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