chrome/browser/chromeos/accessibility/speech_monitor.h

   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 #ifndef CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_SPEECH_MONITOR_H_
   6 #define CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_SPEECH_MONITOR_H_
   7
   8 #include <deque>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "chrome/browser/speech/tts_platform.h"
  12 #include "content/public/test/test_utils.h"
  13
  14 namespace chromeos {
  15
  16 // For testing purpose installs itself as the platform speech synthesis engine,
  17 // allowing it to intercept all speech calls, and then provides a method to
  18 // block until the next utterance is spoken.
  19 class SpeechMonitor : public TtsPlatformImpl {
  20  public:
  21   SpeechMonitor();
  22   ~SpeechMonitor() override;
  23
  24   // Blocks until the next utterance is spoken, and returns its text.
  25   std::string GetNextUtterance();
  26
  27   // Wait for next utterance and return true if next utterance is ChromeVox
  28   // enabled message.
  29   bool SkipChromeVoxEnabledMessage();
  30
  31   // TtsPlatformImpl implementation.
  32   bool PlatformImplAvailable() override;
  33   bool Speak(int utterance_id,
  34              const std::string& utterance,
  35              const std::string& lang,
  36              const VoiceData& voice,
  37              const UtteranceContinuousParameters& params) override;
  38   bool StopSpeaking() override;
  39   bool IsSpeaking() override;
  40   void GetVoices(std::vector<VoiceData>* out_voices) override;
  41   void Pause() override {}
  42   void Resume() override {}
  43   std::string error() override;
  44   void clear_error() override {}
  45   void set_error(const std::string& error) override {}
  46   void WillSpeakUtteranceWithVoice(const Utterance* utterance,
  47                                    const VoiceData& voice_data) override;
  48
  49  private:
  50   scoped_refptr<content::MessageLoopRunner> loop_runner_;
  51   std::deque<std::string> utterance_queue_;
  52
  53   DISALLOW_COPY_AND_ASSIGN(SpeechMonitor);
  54 };
  55
  56 }  // namespace chromeos
  57
  58 #endif  // CHROME_BROWSER_CHROMEOS_ACCESSIBILITY_SPEECH_MONITOR_H_