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      1 // Copyright 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_CHROME_SPEECH_RECOGNITION_MANAGER_DELEGATE_BUBBLE_UI_H_
      6 #define CHROME_BROWSER_SPEECH_CHROME_SPEECH_RECOGNITION_MANAGER_DELEGATE_BUBBLE_UI_H_
      7 
      8 #include "base/compiler_specific.h"
      9 #include "chrome/browser/speech/chrome_speech_recognition_manager_delegate.h"
     10 #include "chrome/browser/speech/speech_recognition_bubble_controller.h"
     11 
     12 namespace speech {
     13 
     14 // This class extends ChromeSpeechRecognitionManagerDelegate to add the behavior
     15 // required to handle the (bubble) UI for speech recognition sessions initiated
     16 // by input elements with a x-webkit-speech attribute. This extended behavior is
     17 // achieved by means of overriding some SpeechRecognitionEventListener methods
     18 // and intercepting the calls required to show, animate and hide the bubble UI.
     19 class ChromeSpeechRecognitionManagerDelegateBubbleUI
     20     : public ChromeSpeechRecognitionManagerDelegate,
     21       public SpeechRecognitionBubbleControllerDelegate {
     22  public:
     23   ChromeSpeechRecognitionManagerDelegateBubbleUI();
     24   virtual ~ChromeSpeechRecognitionManagerDelegateBubbleUI();
     25 
     26  protected:
     27   // SpeechRecognitionBubbleControllerDelegate methods.
     28   virtual void InfoBubbleButtonClicked(
     29       int session_id, SpeechRecognitionBubble::Button button) OVERRIDE;
     30   virtual void InfoBubbleFocusChanged(int session_id) OVERRIDE;
     31 
     32   // Overridden base class SpeechRecognitionEventListener methods.
     33   virtual void OnRecognitionStart(int session_id) OVERRIDE;
     34   virtual void OnAudioStart(int session_id) OVERRIDE;
     35   virtual void OnAudioEnd(int session_id) OVERRIDE;
     36   virtual void OnRecognitionEnd(int session_id) OVERRIDE;
     37   virtual void OnRecognitionError(
     38       int session_id, const content::SpeechRecognitionError& error) OVERRIDE;
     39   virtual void OnAudioLevelsChange(
     40       int session_id, float volume, float noise_volume) OVERRIDE;
     41 
     42   // Starts a new recognition session, using the config of the last one
     43   // (which is copied into |last_session_config_|). Used for "try again".
     44   void RestartLastSession();
     45 
     46   // Called by the base class when tab closure was detected.
     47   virtual void TabClosedCallback(
     48       int render_process_id, int render_view_id) OVERRIDE;
     49 
     50  private:
     51   // Lazy initializer for bubble controller.
     52   SpeechRecognitionBubbleController* GetBubbleController();
     53 
     54   scoped_refptr<SpeechRecognitionBubbleController> bubble_controller_;
     55   scoped_ptr<content::SpeechRecognitionSessionConfig> last_session_config_;
     56 
     57   DISALLOW_COPY_AND_ASSIGN(ChromeSpeechRecognitionManagerDelegateBubbleUI);
     58 };
     59 
     60 }  // namespace speech
     61 
     62 #endif  // CHROME_BROWSER_SPEECH_CHROME_SPEECH_RECOGNITION_MANAGER_DELEGATE_BUBBLE_UI_H_
     63