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// Copyright (c) 2011 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 "chrome/browser/chromeos/dbus/power_manager_client.h"
#include "base/bind.h"
#include "base/callback.h"
#include "chrome/browser/chromeos/system/runtime_environment.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "dbus/object_proxy.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace chromeos {
// The PowerManagerClient implementation used in production.
class PowerManagerClientImpl : public PowerManagerClient {
public:
explicit PowerManagerClientImpl(dbus::Bus* bus)
: power_manager_proxy_(NULL) {
power_manager_proxy_ = bus->GetObjectProxy(
power_manager::kPowerManagerServiceName,
power_manager::kPowerManagerServicePath);
// Monitor the D-Bus signal for brightness changes. Only the power
// manager knows the actual brightness level. We don't cache the
// brightness level in Chrome as it'll make things less reliable.
power_manager_proxy_->ConnectToSignal(
power_manager::kPowerManagerInterface,
power_manager::kBrightnessChangedSignal,
base::Bind(&PowerManagerClientImpl::BrightnessChangedReceived, this),
base::Bind(&PowerManagerClientImpl::BrightnessChangedConnected, this));
}
// PowerManagerClient override.
virtual void AddObserver(Observer* observer) {
observers_.AddObserver(observer);
}
// PowerManagerClient override.
virtual void RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
// PowerManagerClient override.
virtual void DecreaseScreenBrightness(bool allow_off) {
dbus::MethodCall method_call(
power_manager::kPowerManagerInterface,
power_manager::kDecreaseScreenBrightness);
dbus::MessageWriter writer(&method_call);
writer.AppendBool(allow_off);
power_manager_proxy_->CallMethod(
&method_call,
dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::Bind(&PowerManagerClientImpl::OnDecreaseScreenBrightness,
this));
}
// PowerManagerClient override.
virtual void IncreaseScreenBrightness() {
dbus::MethodCall method_call(
power_manager::kPowerManagerInterface,
power_manager::kIncreaseScreenBrightness);
power_manager_proxy_->CallMethod(
&method_call,
dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::Bind(&PowerManagerClientImpl::OnIncreaseScreenBrightness,
this));
}
private:
friend class base::RefCountedThreadSafe<PowerManagerClientImpl>;
virtual ~PowerManagerClientImpl() {
}
// Called when a brightness change signal is received.
void BrightnessChangedReceived(dbus::Signal* signal) {
dbus::MessageReader reader(signal);
int32 brightness_level = 0;
bool user_initiated = 0;
if (!(reader.PopInt32(&brightness_level) &&
reader.PopBool(&user_initiated))) {
LOG(ERROR) << "Brightness changed signal had incorrect parameters: "
<< signal->ToString();
return;
}
VLOG(1) << "Brightness changed to " << brightness_level
<< ": user initiated " << user_initiated;
FOR_EACH_OBSERVER(Observer, observers_,
BrightnessChanged(brightness_level, user_initiated));
}
// Called when the brightness change signal is initially connected.
void BrightnessChangedConnected(const std::string& interface_name,
const std::string& signal_name,
bool success) {
LOG_IF(WARNING, !success)
<< "Failed to connect to brightness changed signal.";
}
// Called when a response for DecreaseScreenBrightness() is received.
void OnDecreaseScreenBrightness(dbus::Response* response) {
if (!response) {
LOG(ERROR) << "Failed to decrease screen brightness";
return;
}
VLOG(1) << "screen brightness increased: " << response->ToString();
}
// Called when a response for IncreaseScreenBrightness() is received.
void OnIncreaseScreenBrightness(dbus::Response* response) {
if (!response) {
LOG(ERROR) << "Failed to increase screen brightness";
return;
}
VLOG(1) << "screen brightness increased: " << response->ToString();
}
dbus::ObjectProxy* power_manager_proxy_;
ObserverList<Observer> observers_;
DISALLOW_COPY_AND_ASSIGN(PowerManagerClientImpl);
};
// The PowerManagerClient implementation used on Linux desktop,
// which does nothing.
class PowerManagerClientStubImpl : public PowerManagerClient {
// PowerManagerClient override.
virtual void AddObserver(Observer* observer) {
}
// PowerManagerClient override.
virtual void RemoveObserver(Observer* observer) {
}
// PowerManagerClient override.
virtual void DecreaseScreenBrightness(bool allow_off) {
VLOG(1) << "Requested to descrease screen brightness";
}
// PowerManagerClient override.
virtual void IncreaseScreenBrightness() {
VLOG(1) << "Requested to increase screen brightness";
}
};
PowerManagerClient::PowerManagerClient() {
}
PowerManagerClient::~PowerManagerClient() {
}
PowerManagerClient* PowerManagerClient::Create(dbus::Bus* bus) {
if (system::runtime_environment::IsRunningOnChromeOS()) {
return new PowerManagerClientImpl(bus);
} else {
return new PowerManagerClientStubImpl();
}
}
} // namespace chromeos
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