| // Copyright (c) 2013 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_MESSAGE_FILTER_H_ |
| #define CHROME_BROWSER_SPEECH_TTS_MESSAGE_FILTER_H_ |
| |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/synchronization/lock.h" |
| #include "content/public/browser/browser_message_filter.h" |
| #include "content/public/browser/browser_thread.h" |
| #include "content/public/browser/notification_observer.h" |
| #include "content/public/browser/notification_registrar.h" |
| #include "content/public/browser/tts_controller.h" |
| |
| namespace content { |
| class BrowserContext; |
| } |
| |
| struct TtsUtteranceRequest; |
| |
| class TtsMessageFilter : public content::BrowserMessageFilter, |
| public content::NotificationObserver, |
| public content::UtteranceEventDelegate, |
| public content::VoicesChangedDelegate { |
| public: |
| explicit TtsMessageFilter(content::BrowserContext* browser_context); |
| |
| // content::BrowserMessageFilter implementation. |
| void OverrideThreadForMessage(const IPC::Message& message, |
| content::BrowserThread::ID* thread) override; |
| bool OnMessageReceived(const IPC::Message& message) override; |
| void OnChannelClosing() override; |
| void OnDestruct() const override; |
| |
| // UtteranceEventDelegate implementation. |
| void OnTtsEvent(content::TtsUtterance* utterance, |
| content::TtsEventType event_type, |
| int char_index, |
| int length, |
| const std::string& error_message) override; |
| |
| // VoicesChangedDelegate implementation. |
| void OnVoicesChanged() override; |
| |
| private: |
| friend class content::BrowserThread; |
| friend class base::DeleteHelper<TtsMessageFilter>; |
| |
| ~TtsMessageFilter() override; |
| |
| void OnInitializeVoiceList(); |
| void OnSpeak(const TtsUtteranceRequest& utterance); |
| void OnPause(); |
| void OnResume(); |
| void OnCancel(); |
| |
| void OnChannelClosingInUIThread(); |
| |
| void Cleanup(); |
| |
| // Thread-safe check to make sure this class is still valid and not |
| // about to be deleted. |
| bool Valid(); |
| |
| // content::NotificationObserver implementation. |
| void Observe(int type, |
| const content::NotificationSource& source, |
| const content::NotificationDetails& details) override; |
| |
| content::BrowserContext* browser_context_; |
| mutable base::Lock mutex_; |
| mutable bool valid_; |
| content::NotificationRegistrar notification_registrar_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TtsMessageFilter); |
| }; |
| |
| #endif // CHROME_BROWSER_SPEECH_TTS_MESSAGE_FILTER_H_ |