src/chrome/browser/speech/tts_message_filter.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_SPEECH_TTS_MESSAGE_FILTER_H_
   6 #define CHROME_BROWSER_SPEECH_TTS_MESSAGE_FILTER_H_
   7
   8 #include "base/memory/weak_ptr.h"
   9 #include "chrome/browser/speech/tts_controller.h"
  10 #include "chrome/common/tts_messages.h"
  11 #include "content/public/browser/browser_message_filter.h"
  12
  13 namespace content {
  14 class BrowserContext;
  15 }
  16
  17 class TtsMessageFilter
  18     : public content::BrowserMessageFilter,
  19       public UtteranceEventDelegate,
  20       public VoicesChangedDelegate {
  21  public:
  22   explicit TtsMessageFilter(int render_process_id,
  23       content::BrowserContext* browser_context);
  24
  25   // content::BrowserMessageFilter implementation.
  26   virtual void OverrideThreadForMessage(
  27       const IPC::Message& message,
  28       content::BrowserThread::ID* thread) OVERRIDE;
  29   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  30   virtual void OnChannelClosing() OVERRIDE;
  31   virtual void OnDestruct() const OVERRIDE;
  32
  33   // UtteranceEventDelegate implementation.
  34   virtual void OnTtsEvent(Utterance* utterance,
  35                           TtsEventType event_type,
  36                           int char_index,
  37                           const std::string& error_message) OVERRIDE;
  38
  39   // VoicesChangedDelegate implementation.
  40   virtual void OnVoicesChanged() OVERRIDE;
  41
  42  private:
  43   friend class content::BrowserThread;
  44   friend class base::DeleteHelper<TtsMessageFilter>;
  45
  46   virtual ~TtsMessageFilter();
  47
  48   void OnInitializeVoiceList();
  49   void OnSpeak(const TtsUtteranceRequest& utterance);
  50   void OnPause();
  51   void OnResume();
  52   void OnCancel();
  53
  54   void OnChannelClosingInUIThread();
  55
  56   int render_process_id_;
  57   content::BrowserContext* browser_context_;
  58
  59   base::WeakPtrFactory<TtsMessageFilter> weak_ptr_factory_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(TtsMessageFilter);
  62 };
  63
  64 #endif  // CHROME_BROWSER_SPEECH_TTS_MESSAGE_FILTER_H_