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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CHROME_BROWSER_CHROMEOS_DBUS_BLUETOOTH_PROPERTY_H_ | |
6 #define CHROME_BROWSER_CHROMEOS_DBUS_BLUETOOTH_PROPERTY_H_ | |
7 #pragma once | |
8 | |
9 #include "base/compiler_specific.h" | |
10 #include "dbus/message.h" | |
11 #include "dbus/object_proxy.h" | |
12 #include "dbus/property.h" | |
13 #include "third_party/cros_system_api/dbus/service_constants.h" | |
14 | |
15 namespace chromeos { | |
16 | |
17 // BlueZ predates the common D-Bus Properties API (though it inspired it), | |
18 // override dbus::PropertySet to generate the correct method call to get | |
19 // all properties, conenect to the correct signal and parse it correctly. | |
20 // | |
21 // BluetoothPropertySet should be used with BluetoothProperty<>. | |
22 class BluetoothPropertySet : public dbus::PropertySet { | |
23 public: | |
24 BluetoothPropertySet(dbus::ObjectProxy* object_proxy, | |
25 const std::string& interface, | |
26 PropertyChangedCallback callback) | |
27 : dbus::PropertySet(object_proxy, interface, callback) {} | |
28 | |
29 // dbus::PropertySet override. | |
30 // | |
31 // Call after construction to connect property change notification | |
32 // signals. Sub-classes may override to use different D-Bus signals. | |
33 virtual void ConnectSignals() OVERRIDE; | |
34 | |
35 // dbus::PropertySet override. | |
36 // | |
37 // Queries the remote object for values of all properties and updates | |
38 // initial values. | |
39 virtual void GetAll() OVERRIDE; | |
40 | |
41 // dbus::PropertySet override. | |
42 // | |
43 // Method connected by ConnectSignals() and called by dbus:: when | |
44 // a property is changed. | |
45 virtual void ChangedReceived(dbus::Signal* signal) OVERRIDE; | |
46 }; | |
47 | |
48 // BlueZ predates the common D-Bus Properties API (though it inspired it), | |
49 // override dbus::Property<> to generate the correct method call to set a | |
50 // new property value. | |
51 template <class T> | |
52 class BluetoothProperty : public dbus::Property<T> { | |
53 public: | |
54 // Import the callbacks into our namespace (this is a template derived from | |
55 // a template, the C++ standard gets a bit wibbly and doesn't do it for us). | |
56 // | |
57 // |success| indicates whether or not the value could be retrived, or new | |
58 // value set. For Get, if true the new value can be obtained by calling | |
59 // value() on the property; for Set() a Get() call may be necessary. | |
60 typedef typename dbus::Property<T>::GetCallback GetCallback; | |
61 typedef typename dbus::Property<T>::SetCallback SetCallback; | |
62 | |
63 // dbus::Property<> override. | |
64 // | |
65 // Requests an updated value from the remote object incurring a | |
66 // round-trip. |callback| will be called when the new value is available. | |
67 virtual void Get(GetCallback callback) OVERRIDE { | |
68 NOTREACHED() << "BlueZ does not implement Get for properties"; | |
69 } | |
70 | |
71 // dbus::Property<> override. | |
72 // | |
73 // Requests that the remote object change the property value to |value|, | |
74 // |callback| will be called to indicate the success or failure of the | |
75 // request, however the new value may not be available depending on the | |
76 // remote object. | |
77 virtual void Set(const T& value, SetCallback callback) OVERRIDE { | |
78 dbus::MethodCall method_call(this->property_set()->interface(), | |
79 bluetooth_common::kSetProperty); | |
80 dbus::MessageWriter writer(&method_call); | |
81 writer.AppendString(this->name()); | |
82 this->AppendToWriter(&writer, value); | |
83 | |
84 dbus::ObjectProxy *object_proxy = this->property_set()->object_proxy(); | |
85 DCHECK(object_proxy); | |
86 object_proxy->CallMethod(&method_call, | |
87 dbus::ObjectProxy::TIMEOUT_USE_DEFAULT, | |
88 base::Bind(&dbus::Property<T>::OnSet, | |
89 this->GetWeakPtr(), | |
90 callback)); | |
91 } | |
92 }; | |
93 | |
94 } // namespace chromeos | |
95 | |
96 #endif // CHROME_BROWSER_CHROMEOS_DBUS_BLUETOOTH_PROPERTY_H_ | |
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