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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/root_power_manager_client.h"
#include "base/bind.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/time.h"
#include "chromeos/dbus/power_manager/input_event.pb.h"
#include "chromeos/dbus/power_manager/suspend.pb.h"
#include "chromeos/dbus/root_power_manager_observer.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "dbus/object_path.h"
#include "dbus/object_proxy.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace chromeos {
// The RootPowerManagerClient implementation used in production.
class RootPowerManagerClientImpl : public RootPowerManagerClient {
public:
explicit RootPowerManagerClientImpl(dbus::Bus* bus)
: proxy_(NULL),
weak_ptr_factory_(this) {
proxy_ = bus->GetObjectProxy(
power_manager::kRootPowerManagerServiceName,
dbus::ObjectPath(power_manager::kRootPowerManagerServicePath));
proxy_->ConnectToSignal(
power_manager::kRootPowerManagerInterface,
power_manager::kInputEventSignal,
base::Bind(&RootPowerManagerClientImpl::InputEventReceived,
weak_ptr_factory_.GetWeakPtr()),
base::Bind(&RootPowerManagerClientImpl::SignalConnected,
weak_ptr_factory_.GetWeakPtr()));
proxy_->ConnectToSignal(
power_manager::kRootPowerManagerInterface,
power_manager::kSuspendStateChangedSignal,
base::Bind(&RootPowerManagerClientImpl::SuspendStateChangedReceived,
weak_ptr_factory_.GetWeakPtr()),
base::Bind(&RootPowerManagerClientImpl::SignalConnected,
weak_ptr_factory_.GetWeakPtr()));
}
virtual ~RootPowerManagerClientImpl() {
}
// RootPowerManagerClient overrides:
virtual void AddObserver(RootPowerManagerObserver* observer) OVERRIDE {
observers_.AddObserver(observer);
}
virtual void RemoveObserver(RootPowerManagerObserver* observer) OVERRIDE {
observers_.RemoveObserver(observer);
}
virtual bool HasObserver(RootPowerManagerObserver* observer) OVERRIDE {
return observers_.HasObserver(observer);
}
private:
// Called when a D-Bus signal is initially connected.
void SignalConnected(const std::string& interface_name,
const std::string& signal_name,
bool success) {
if (!success)
LOG(WARNING) << "Failed to connect to signal " << signal_name;
}
void InputEventReceived(dbus::Signal* signal) {
dbus::MessageReader reader(signal);
power_manager::InputEvent proto;
if (!reader.PopArrayOfBytesAsProto(&proto)) {
LOG(ERROR) << "Unable to decode protocol buffer from "
<< power_manager::kInputEventSignal << " signal";
return;
}
base::TimeTicks timestamp =
base::TimeTicks::FromInternalValue(proto.timestamp());
VLOG(1) << "Got " << power_manager::kInputEventSignal << " signal:"
<< " type=" << proto.type() << " timestamp=" << proto.timestamp();
switch (proto.type()) {
case power_manager::InputEvent_Type_POWER_BUTTON_DOWN:
case power_manager::InputEvent_Type_POWER_BUTTON_UP: {
bool down =
(proto.type() == power_manager::InputEvent_Type_POWER_BUTTON_DOWN);
FOR_EACH_OBSERVER(RootPowerManagerObserver, observers_,
OnPowerButtonEvent(down, timestamp));
break;
}
case power_manager::InputEvent_Type_LID_OPEN:
case power_manager::InputEvent_Type_LID_CLOSED: {
bool open =
(proto.type() == power_manager::InputEvent_Type_LID_OPEN);
FOR_EACH_OBSERVER(RootPowerManagerObserver, observers_,
OnLidEvent(open, timestamp));
break;
}
}
}
void SuspendStateChangedReceived(dbus::Signal* signal) {
dbus::MessageReader reader(signal);
power_manager::SuspendState proto;
if (!reader.PopArrayOfBytesAsProto(&proto)) {
LOG(ERROR) << "Unable to decode protocol buffer from "
<< power_manager::kSuspendStateChangedSignal << " signal";
return;
}
VLOG(1) << "Got " << power_manager::kSuspendStateChangedSignal << " signal:"
<< " type=" << proto.type() << " wall_time=" << proto.wall_time();
base::Time wall_time =
base::Time::FromInternalValue(proto.wall_time());
switch (proto.type()) {
case power_manager::SuspendState_Type_SUSPEND_TO_MEMORY:
last_suspend_wall_time_ = wall_time;
break;
case power_manager::SuspendState_Type_RESUME:
FOR_EACH_OBSERVER(
RootPowerManagerObserver, observers_,
OnResume(wall_time - last_suspend_wall_time_));
break;
}
}
dbus::ObjectProxy* proxy_;
ObserverList<RootPowerManagerObserver> observers_;
// Wall time from the latest signal telling us that the system was about to
// suspend to memory.
base::Time last_suspend_wall_time_;
// Note: This should remain the last member so it'll be destroyed and
// invalidate its weak pointers before any other members are destroyed.
base::WeakPtrFactory<RootPowerManagerClientImpl> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(RootPowerManagerClientImpl);
};
// A no-op RootPowerManagerClient implementation used on Linux desktops.
class RootPowerManagerClientStubImpl : public RootPowerManagerClient {
public:
RootPowerManagerClientStubImpl() {}
virtual ~RootPowerManagerClientStubImpl() {}
// RootPowerManagerClient overrides:
virtual void AddObserver(RootPowerManagerObserver* observer) OVERRIDE {
observers_.AddObserver(observer);
}
virtual void RemoveObserver(RootPowerManagerObserver* observer) OVERRIDE {
observers_.RemoveObserver(observer);
}
virtual bool HasObserver(RootPowerManagerObserver* observer) OVERRIDE {
return observers_.HasObserver(observer);
}
private:
ObserverList<RootPowerManagerObserver> observers_;
DISALLOW_COPY_AND_ASSIGN(RootPowerManagerClientStubImpl);
};
RootPowerManagerClient::RootPowerManagerClient() {
}
RootPowerManagerClient::~RootPowerManagerClient() {
}
RootPowerManagerClient* RootPowerManagerClient::Create(
DBusClientImplementationType type,
dbus::Bus* bus) {
if (type == REAL_DBUS_CLIENT_IMPLEMENTATION)
return new RootPowerManagerClientImpl(bus);
DCHECK_EQ(STUB_DBUS_CLIENT_IMPLEMENTATION, type);
return new RootPowerManagerClientStubImpl();
}
} // namespace chromeos
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