| // Copyright (c) 2012 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 CHROME_BROWSER_SPEECH_EXTENSION_API_TTS_ENGINE_EXTENSION_API_H_ |
| #define CHROME_BROWSER_SPEECH_EXTENSION_API_TTS_ENGINE_EXTENSION_API_H_ |
| |
| #include <vector> |
| |
| #include "base/memory/singleton.h" |
| #include "chrome/browser/speech/tts_controller.h" |
| #include "extensions/browser/extension_function.h" |
| |
| class Utterance; |
| |
| namespace base { |
| class ListValue; |
| } |
| |
| namespace content { |
| class BrowserContext; |
| } |
| |
| namespace extensions { |
| class Extension; |
| } |
| |
| namespace tts_engine_events { |
| extern const char kOnSpeak[]; |
| extern const char kOnStop[]; |
| extern const char kOnPause[]; |
| extern const char kOnResume[]; |
| } |
| |
| // TtsEngineDelegate implementation used by TtsController. |
| class TtsExtensionEngine : public TtsEngineDelegate { |
| public: |
| static TtsExtensionEngine* GetInstance(); |
| |
| // Overridden from TtsEngineDelegate: |
| void GetVoices(content::BrowserContext* browser_context, |
| std::vector<VoiceData>* out_voices) override; |
| void Speak(Utterance* utterance, const VoiceData& voice) override; |
| void Stop(Utterance* utterance) override; |
| void Pause(Utterance* utterance) override; |
| void Resume(Utterance* utterance) override; |
| bool LoadBuiltInTtsExtension( |
| content::BrowserContext* browser_context) override; |
| }; |
| // Hidden/internal extension function used to allow TTS engine extensions |
| // to send events back to the client that's calling tts.speak(). |
| class ExtensionTtsEngineSendTtsEventFunction : public SyncExtensionFunction { |
| private: |
| ~ExtensionTtsEngineSendTtsEventFunction() override {} |
| bool RunSync() override; |
| DECLARE_EXTENSION_FUNCTION("ttsEngine.sendTtsEvent", TTSENGINE_SENDTTSEVENT) |
| }; |
| |
| #endif // CHROME_BROWSER_SPEECH_EXTENSION_API_TTS_ENGINE_EXTENSION_API_H_ |