chrome/browser/extensions/api/braille_display_private/braille_controller_stub.cc

   1 // Copyright 2013 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 "chrome/browser/extensions/api/braille_display_private/braille_controller.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "base/memory/singleton.h"
   9 #include "chrome/common/extensions/api/braille_display_private.h"
  10
  11 namespace extensions {
  12 namespace api {
  13 namespace braille_display_private {
  14
  15 // Stub implementation of BrailleController for use when brlapi is not
  16 // enabled.
  17 class BrailleControllerImpl : public BrailleController {
  18  public:
  19   static BrailleControllerImpl* GetInstance();
  20   scoped_ptr<DisplayState> GetDisplayState() override;
  21   void WriteDots(const std::vector<char>& cells) override;
  22   void AddObserver(BrailleObserver* observer) override;
  23   void RemoveObserver(BrailleObserver* observer) override;
  24
  25  private:
  26   BrailleControllerImpl();
  27   ~BrailleControllerImpl() override;
  28   friend struct base::DefaultSingletonTraits<BrailleControllerImpl>;
  29   DISALLOW_COPY_AND_ASSIGN(BrailleControllerImpl);
  30 };
  31
  32 BrailleController::BrailleController() {
  33 }
  34
  35 BrailleController::~BrailleController() {
  36 }
  37
  38 // static
  39 BrailleController* BrailleController::GetInstance() {
  40   return BrailleControllerImpl::GetInstance();
  41 }
  42
  43 BrailleControllerImpl::BrailleControllerImpl() {
  44 }
  45
  46 BrailleControllerImpl::~BrailleControllerImpl() {
  47 }
  48
  49 // static
  50 BrailleControllerImpl* BrailleControllerImpl::GetInstance() {
  51   return base::Singleton<
  52       BrailleControllerImpl,
  53       base::LeakySingletonTraits<BrailleControllerImpl>>::get();
  54 }
  55
  56 scoped_ptr<DisplayState> BrailleControllerImpl::GetDisplayState() {
  57   return scoped_ptr<DisplayState>(new DisplayState()).Pass();
  58 }
  59
  60 void BrailleControllerImpl::WriteDots(const std::vector<char>& cells) {
  61 }
  62
  63 void BrailleControllerImpl::AddObserver(BrailleObserver* observer) {
  64 }
  65
  66 void BrailleControllerImpl::RemoveObserver(BrailleObserver* observer) {
  67 }
  68
  69 }  // namespace braille_display_private
  70 }  // namespace api
  71 }  // namespace extensions