chrome/browser/ui/app_list/start_page_service.h

   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_UI_APP_LIST_START_PAGE_SERVICE_H_
   6 #define CHROME_BROWSER_UI_APP_LIST_START_PAGE_SERVICE_H_
   7
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/observer_list.h"
  14 #include "base/strings/string16.h"
  15 #include "components/browser_context_keyed_service/browser_context_keyed_service.h"
  16 #include "content/public/browser/web_contents.h"
  17 #include "ui/app_list/speech_ui_model_observer.h"
  18
  19 namespace extensions {
  20 class Extension;
  21 }
  22
  23 class Profile;
  24
  25 namespace app_list {
  26
  27 class RecommendedApps;
  28 class StartPageObserver;
  29
  30 // StartPageService collects data to be displayed in app list's start page
  31 // and hosts the start page contents.
  32 class StartPageService : public BrowserContextKeyedService {
  33  public:
  34   typedef std::vector<scoped_refptr<const extensions::Extension> >
  35       ExtensionList;
  36   // Gets the instance for the given profile.
  37   static StartPageService* Get(Profile* profile);
  38
  39   void AddObserver(StartPageObserver* observer);
  40   void RemoveObserver(StartPageObserver* observer);
  41
  42   void ToggleSpeechRecognition();
  43
  44   // They return essentially the same web contents but might return NULL when
  45   // some flag disables the feature.
  46   content::WebContents* GetStartPageContents();
  47   content::WebContents* GetSpeechRecognitionContents();
  48
  49   RecommendedApps* recommended_apps() { return recommended_apps_.get(); }
  50   Profile* profile() { return profile_; }
  51   void OnSpeechResult(const base::string16& query, bool is_final);
  52   void OnSpeechSoundLevelChanged(int16 level);
  53   void OnSpeechRecognitionStateChanged(SpeechRecognitionState new_state);
  54
  55  private:
  56   // A BrowserContextKeyedServiceFactory for this service.
  57   class Factory;
  58
  59   // ProfileDestroyObserver to shutdown the service on exiting. WebContents
  60   // depends on the profile and needs to be closed before the profile and its
  61   // keyed service shutdown.
  62   class ProfileDestroyObserver;
  63
  64   // The WebContentsDelegate implementation for the start page. This allows
  65   // getUserMedia() request from the web contents.
  66   class StartPageWebContentsDelegate;
  67
  68   explicit StartPageService(Profile* profile);
  69   virtual ~StartPageService();
  70
  71   // BrowserContextKeyedService overrides:
  72   virtual void Shutdown() OVERRIDE;
  73
  74   Profile* profile_;
  75   scoped_ptr<content::WebContents> contents_;
  76   scoped_ptr<StartPageWebContentsDelegate> contents_delegate_;
  77   scoped_ptr<ProfileDestroyObserver> profile_destroy_observer_;
  78   scoped_ptr<RecommendedApps> recommended_apps_;
  79   ObserverList<StartPageObserver> observers_;
  80
  81   DISALLOW_COPY_AND_ASSIGN(StartPageService);
  82 };
  83
  84 }  // namespace app_list
  85
  86 #endif  // CHROME_BROWSER_UI_APP_LIST_START_PAGE_SERVICE_H_