| // 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_TTS_EXTENSION_LOADER_CHROMEOS_H_ |
| #define CHROME_BROWSER_SPEECH_TTS_EXTENSION_LOADER_CHROMEOS_H_ |
| |
| #include "components/browser_context_keyed_service/browser_context_keyed_service.h" |
| #include "extensions/browser/event_router.h" |
| |
| class Profile; |
| |
| // Profile-keyed class that loads a built-in TTS component extension |
| // into a given profile on Chrome OS. |
| class TtsExtensionLoaderChromeOs |
| : public BrowserContextKeyedService, |
| public extensions::EventRouter::Observer { |
| public: |
| static TtsExtensionLoaderChromeOs* GetInstance(Profile* profile); |
| |
| // Returns true if the extension was not previously loaded and is now |
| // loading. This class will call |
| // ExtensionTtsController::RetrySpeakingQueuedUtterances when the |
| // extension finishes loading. |
| bool LoadTtsExtension(); |
| |
| // Implementation of BrowserContextKeyedService. |
| virtual void Shutdown() OVERRIDE; |
| |
| // Implementation of extensions::EventRouter::Observer. |
| virtual void OnListenerAdded(const extensions::EventListenerInfo& details) |
| OVERRIDE; |
| |
| private: |
| // The state of TTS for this profile. |
| enum TtsState { |
| TTS_NOT_LOADED, |
| TTS_LOAD_REQUESTED, |
| TTS_LOADING, |
| TTS_LOADED |
| }; |
| |
| explicit TtsExtensionLoaderChromeOs(Profile* profile); |
| virtual ~TtsExtensionLoaderChromeOs() {} |
| |
| bool IsTtsLoadedInThisProfile(); |
| |
| Profile* profile_; |
| TtsState tts_state_; |
| |
| friend class TtsExtensionLoaderChromeOsFactory; |
| |
| DISALLOW_COPY_AND_ASSIGN(TtsExtensionLoaderChromeOs); |
| }; |
| |
| #endif // CHROME_BROWSER_SPEECH_TTS_EXTENSION_LOADER_CHROMEOS_H_ |