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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.
#ifndef CHROMEOS_DBUS_BLUETOOTH_PROPERTY_H_
#define CHROMEOS_DBUS_BLUETOOTH_PROPERTY_H_
#pragma once
#include "base/compiler_specific.h"
#include "dbus/message.h"
#include "dbus/object_proxy.h"
#include "dbus/property.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace chromeos {
// BlueZ predates the common D-Bus Properties API (though it inspired it),
// override dbus::PropertySet to generate the correct method call to get
// all properties, conenect to the correct signal and parse it correctly.
//
// BluetoothPropertySet should be used with BluetoothProperty<>.
class BluetoothPropertySet : public dbus::PropertySet {
public:
BluetoothPropertySet(dbus::ObjectProxy* object_proxy,
const std::string& interface,
const PropertyChangedCallback& callback)
: dbus::PropertySet(object_proxy, interface, callback) {}
// dbus::PropertySet override.
//
// Call after construction to connect property change notification
// signals. Sub-classes may override to use different D-Bus signals.
virtual void ConnectSignals() OVERRIDE;
// dbus::PropertySet override.
//
// Queries the remote object for values of all properties and updates
// initial values.
virtual void GetAll() OVERRIDE;
// dbus::PropertySet override.
//
// Method connected by ConnectSignals() and called by dbus:: when
// a property is changed.
virtual void ChangedReceived(dbus::Signal* signal) OVERRIDE;
};
// BlueZ predates the common D-Bus Properties API (though it inspired it),
// override dbus::Property<> to generate the correct method call to set a
// new property value.
template <class T>
class BluetoothProperty : public dbus::Property<T> {
public:
// Import the callbacks into our namespace (this is a template derived from
// a template, the C++ standard gets a bit wibbly and doesn't do it for us).
//
// |success| indicates whether or not the value could be retrived, or new
// value set. For Get, if true the new value can be obtained by calling
// value() on the property; for Set() a Get() call may be necessary.
typedef typename dbus::Property<T>::GetCallback GetCallback;
typedef typename dbus::Property<T>::SetCallback SetCallback;
// dbus::Property<> override.
//
// Requests an updated value from the remote object incurring a
// round-trip. |callback| will be called when the new value is available.
virtual void Get(GetCallback callback) OVERRIDE {
NOTREACHED() << "BlueZ does not implement Get for properties";
}
// dbus::Property<> override.
//
// Requests that the remote object change the property value to |value|,
// |callback| will be called to indicate the success or failure of the
// request, however the new value may not be available depending on the
// remote object.
virtual void Set(const T& value, SetCallback callback) OVERRIDE {
dbus::MethodCall method_call(this->property_set()->interface(),
bluetooth_common::kSetProperty);
dbus::MessageWriter writer(&method_call);
writer.AppendString(this->name());
this->AppendToWriter(&writer, value);
dbus::ObjectProxy *object_proxy = this->property_set()->object_proxy();
DCHECK(object_proxy);
object_proxy->CallMethod(&method_call,
dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::Bind(&dbus::Property<T>::OnSet,
this->GetWeakPtr(),
callback));
}
};
} // namespace chromeos
#endif // CHROMEOS_DBUS_BLUETOOTH_PROPERTY_H_
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