src/chrome/browser/chromeos/accessibility/speech_monitor.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 "chrome/browser/chromeos/accessibility/speech_monitor.h"
   6
   7 namespace chromeos {
   8
   9 namespace {
  10 const char kChromeVoxEnabledMessage[] = "chrome vox spoken feedback is ready";
  11 }  // anonymous namespace
  12
  13 SpeechMonitor::SpeechMonitor() {
  14   TtsController::GetInstance()->SetPlatformImpl(this);
  15 }
  16
  17 SpeechMonitor::~SpeechMonitor() {
  18   TtsController::GetInstance()->SetPlatformImpl(TtsPlatformImpl::GetInstance());
  19 }
  20
  21 std::string SpeechMonitor::GetNextUtterance() {
  22   if (utterance_queue_.empty()) {
  23     loop_runner_ = new content::MessageLoopRunner();
  24     loop_runner_->Run();
  25     loop_runner_ = NULL;
  26   }
  27   std::string result = utterance_queue_.front();
  28   utterance_queue_.pop_front();
  29   return result;
  30 }
  31
  32 bool SpeechMonitor::SkipChromeVoxEnabledMessage() {
  33   return GetNextUtterance() == kChromeVoxEnabledMessage;
  34 }
  35
  36 bool SpeechMonitor::PlatformImplAvailable() {
  37   return true;
  38 }
  39
  40 bool SpeechMonitor::Speak(
  41     int utterance_id,
  42     const std::string& utterance,
  43     const std::string& lang,
  44     const VoiceData& voice,
  45     const UtteranceContinuousParameters& params) {
  46   TtsController::GetInstance()->OnTtsEvent(
  47       utterance_id,
  48       TTS_EVENT_END,
  49       static_cast<int>(utterance.size()),
  50       std::string());
  51   return true;
  52 }
  53
  54 bool SpeechMonitor::StopSpeaking() {
  55   return true;
  56 }
  57
  58 bool SpeechMonitor::IsSpeaking() {
  59   return false;
  60 }
  61
  62 void SpeechMonitor::GetVoices(std::vector<VoiceData>* out_voices) {
  63   out_voices->push_back(VoiceData());
  64   VoiceData& voice = out_voices->back();
  65   voice.native = true;
  66   voice.name = "SpeechMonitor";
  67   voice.events.insert(TTS_EVENT_END);
  68 }
  69
  70 std::string SpeechMonitor::error() {
  71   return "";
  72 }
  73
  74 void SpeechMonitor::WillSpeakUtteranceWithVoice(const Utterance* utterance,
  75                                                 const VoiceData& voice_data) {
  76   utterance_queue_.push_back(utterance->text());
  77   if (loop_runner_.get())
  78     loop_runner_->Quit();
  79 }
  80
  81 }  // namespace chromeos