// Copyright (c) 2011 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. #include "base/memory/singleton.h" #include "chrome/browser/extensions/extension_tts_api_platform.h" namespace { const char kNotSupportedError[] = "Native speech synthesis not supported on this platform."; }; class ExtensionTtsPlatformImplLinux : public ExtensionTtsPlatformImpl { public: virtual bool PlatformImplAvailable() { return false; } virtual bool Speak( int utterance_id, const std::string& utterance, const std::string& lang, const UtteranceContinuousParameters& params) { error_ = kNotSupportedError; return false; } virtual bool StopSpeaking() { error_ = kNotSupportedError; return false; } virtual bool IsSpeaking() { error_ = kNotSupportedError; return false; } virtual bool SendsEvent(TtsEventType event_type) { return false; } // Get the single instance of this class. static ExtensionTtsPlatformImplLinux* GetInstance() { return Singleton<ExtensionTtsPlatformImplLinux>::get(); } private: ExtensionTtsPlatformImplLinux() {} virtual ~ExtensionTtsPlatformImplLinux() {} friend struct DefaultSingletonTraits<ExtensionTtsPlatformImplLinux>; DISALLOW_COPY_AND_ASSIGN(ExtensionTtsPlatformImplLinux); }; // static ExtensionTtsPlatformImpl* ExtensionTtsPlatformImpl::GetInstance() { return ExtensionTtsPlatformImplLinux::GetInstance(); }