dbus: add Property handling for clients

D-Bus properties can be tricky to handle due to their reliance on variants,
and since they use a common interface, result in a lot of copy and paste
code to deal with.

Add an API that simplifies matters somewhat; detailed documentation is in
dbus/property.h, but fundamentally you add a struct Properties to the client
implementation derived from dbus::PropertySet, and in it declare members of
dbus::Property<property type> and connect them in the constructor with
RegisterProperty(name, ptr).

The API works on two levels, from a higher-level each member of the structure
is a type-safe way to obtain the current value of the property, update the
value, and set a new value.

From the lower-level, it uses a generic reader/writer based interface so that
the parent structure's GetAll and signal handling methods can update the
values without requiring knowledge of the contained type.

BUG=chromium:109194
TEST=unit tests included in CL

change-Id: I111b9e60a2c6c35edd9e0ea9f6976928c6c6474b


Review URL: http://codereview.chromium.org/9380053

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@122039 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 19 insertions, 1 deletions

diff --git a/dbus/test_service.h b/dbus/test_service.h
index ea3e5ad..2b49229 100644
--- a/dbus/test_service.h
+++ b/dbus/test_service.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -106,6 +106,24 @@ class TestService : public base::Thread {
   void BrokenMethod(MethodCall* method_call,
                     dbus::ExportedObject::ResponseSender response_sender);
 
+  // Returns a set of property values for testing.
+  void GetAllProperties(MethodCall* method_call,
+                        dbus::ExportedObject::ResponseSender response_sender);
+
+  // Returns a new value of 20 for the Version property when called.
+  void GetProperty(MethodCall* method_call,
+                   dbus::ExportedObject::ResponseSender response_sender);
+
+  // Allows the name property to be changed, errors otherwise.
+  void SetProperty(MethodCall* method_call,
+                   dbus::ExportedObject::ResponseSender response_sender);
+
+  // Sends a property changed signal for the name property.
+  void SendPropertyChangedSignal(const std::string& name);
+
+  // Helper function for SendPropertyChangedSignal().
+  void SendPropertyChangedSignalInternal(const std::string& name);
+
   scoped_refptr<base::MessageLoopProxy> dbus_thread_message_loop_proxy_;
   base::WaitableEvent on_all_methods_exported_;
   // The number of methods actually exported.