android_webview/browser/aw_speech_recognition_manager_delegate.h

// Copyright 2018 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.

#ifndef ANDROID_WEBVIEW_BROWSER_AW_SPEECH_RECOGNITION_MANAGER_DELEGATE_H_
#define ANDROID_WEBVIEW_BROWSER_AW_SPEECH_RECOGNITION_MANAGER_DELEGATE_H_

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "content/public/browser/speech_recognition_event_listener.h"
#include "content/public/browser/speech_recognition_manager_delegate.h"
#include "content/public/browser/speech_recognition_session_config.h"

namespace android_webview {

// Android WebView implementation of the SpeechRecognitionManagerDelgate
// interface.
class AwSpeechRecognitionManagerDelegate
    : public content::SpeechRecognitionManagerDelegate,
      public content::SpeechRecognitionEventListener {
 public:
  AwSpeechRecognitionManagerDelegate();
  ~AwSpeechRecognitionManagerDelegate() override;

 protected:
  // SpeechRecognitionEventListener methods.
  void OnRecognitionStart(int session_id) override;
  void OnAudioStart(int session_id) override;
  void OnEnvironmentEstimationComplete(int session_id) override;
  void OnSoundStart(int session_id) override;
  void OnSoundEnd(int session_id) override;
  void OnAudioEnd(int session_id) override;
  void OnRecognitionEnd(int session_id) override;
  void OnRecognitionResults(
      int session_id,
      const std::vector<blink::mojom::SpeechRecognitionResultPtr>& result)
      override;
  void OnRecognitionError(
      int session_id,
      const blink::mojom::SpeechRecognitionError& error) override;
  void OnAudioLevelsChange(int session_id,
                           float volume,
                           float noise_volume) override;

  // SpeechRecognitionManagerDelegate methods.
  void CheckRecognitionIsAllowed(
      int session_id,
      base::OnceCallback<void(bool ask_user, bool is_allowed)> callback)
      override;
  content::SpeechRecognitionEventListener* GetEventListener() override;
  bool FilterProfanities(int render_process_id) override;

 private:
  // Checks for VIEW_TYPE_TAB_CONTENTS host in the UI thread and notifies back
  // the result in the IO thread through |callback|.
  static void CheckRenderFrameType(
      base::OnceCallback<void(bool ask_user, bool is_allowed)> callback,
      int render_process_id,
      int render_frame_id);

  DISALLOW_COPY_AND_ASSIGN(AwSpeechRecognitionManagerDelegate);
};

}  // namespace android_webview

#endif  // ANDROID_WEBVIEW_BROWSER_AW_SPEECH_RECOGNITION_MANAGER_DELEGATE_H_