athena/system/system_ui_impl.cc

   1 // Copyright 2014 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 #include "athena/system/public/system_ui.h"
   6
   7 #include "athena/system/device_socket_listener.h"
   8 #include "athena/system/orientation_controller.h"
   9 #include "athena/system/power_button_controller.h"
  10 #include "base/logging.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "base/memory/scoped_ptr.h"
  13
  14 namespace athena {
  15 namespace {
  16
  17 SystemUI* instance = NULL;
  18
  19 class SystemUIImpl : public SystemUI {
  20  public:
  21   SystemUIImpl(scoped_refptr<base::TaskRunner> file_task_runner)
  22       : orientation_controller_(new OrientationController()),
  23         power_button_controller_(new PowerButtonController) {
  24     orientation_controller_->InitWith(file_task_runner);
  25   }
  26
  27   virtual ~SystemUIImpl() {
  28     // Stops file watching now if exists. Waiting until message loop shutdon
  29     // leads to FilePathWatcher crash.
  30     orientation_controller_->Shutdown();
  31   }
  32
  33  private:
  34   scoped_refptr<OrientationController> orientation_controller_;
  35   scoped_ptr<PowerButtonController> power_button_controller_;
  36
  37   DISALLOW_COPY_AND_ASSIGN(SystemUIImpl);
  38 };
  39
  40 }  // namespace
  41
  42 // static
  43 SystemUI* SystemUI::Create(scoped_refptr<base::TaskRunner> file_task_runner) {
  44   DeviceSocketListener::CreateSocketManager(file_task_runner);
  45   instance = new SystemUIImpl(file_task_runner);
  46   return instance;
  47 }
  48
  49 // static
  50 void SystemUI::Shutdown() {
  51   CHECK(instance);
  52   delete instance;
  53   instance = NULL;
  54   DeviceSocketListener::ShutdownSocketManager();
  55 }
  56
  57 }  // namespace athena