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/callback.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/observer_list.h"
  15 #include "base/strings/string16.h"
  16 #include "components/keyed_service/core/keyed_service.h"
  17 #include "content/public/browser/web_contents.h"
  18 #include "ui/app_list/speech_ui_model_observer.h"
  19
  20 namespace extensions {
  21 class Extension;
  22 }
  23
  24 class Profile;
  25
  26 namespace app_list {
  27
  28 class RecommendedApps;
  29 class StartPageObserver;
  30
  31 // StartPageService collects data to be displayed in app list's start page
  32 // and hosts the start page contents.
  33 class StartPageService : public KeyedService {
  34  public:
  35   typedef std::vector<scoped_refptr<const extensions::Extension> >
  36       ExtensionList;
  37   // Gets the instance for the given profile.
  38   static StartPageService* Get(Profile* profile);
  39
  40   void AddObserver(StartPageObserver* observer);
  41   void RemoveObserver(StartPageObserver* observer);
  42
  43   void AppListShown();
  44   void AppListHidden();
  45   void ToggleSpeechRecognition();
  46
  47   // Called when the WebUI has finished loading.
  48   void WebUILoaded();
  49
  50   // Returns true if the hotword is enabled in the app-launcher.
  51   bool HotwordEnabled();
  52
  53   // They return essentially the same web contents but might return NULL when
  54   // some flag disables the feature.
  55   content::WebContents* GetStartPageContents();
  56   content::WebContents* GetSpeechRecognitionContents();
  57
  58   RecommendedApps* recommended_apps() { return recommended_apps_.get(); }
  59   Profile* profile() { return profile_; }
  60   SpeechRecognitionState state() { return state_; }
  61   void OnSpeechResult(const base::string16& query, bool is_final);
  62   void OnSpeechSoundLevelChanged(int16 level);
  63   void OnSpeechRecognitionStateChanged(SpeechRecognitionState new_state);
  64
  65  private:
  66   friend class StartPageServiceFactory;
  67
  68   // ProfileDestroyObserver to shutdown the service on exiting. WebContents
  69   // depends on the profile and needs to be closed before the profile and its
  70   // keyed service shutdown.
  71   class ProfileDestroyObserver;
  72
  73   // The WebContentsDelegate implementation for the start page. This allows
  74   // getUserMedia() request from the web contents.
  75   class StartPageWebContentsDelegate;
  76
  77   explicit StartPageService(Profile* profile);
  78   virtual ~StartPageService();
  79
  80   void LoadContents();
  81   void UnloadContents();
  82
  83   // KeyedService overrides:
  84   virtual void Shutdown() override;
  85
  86   Profile* profile_;
  87   scoped_ptr<content::WebContents> contents_;
  88   scoped_ptr<StartPageWebContentsDelegate> contents_delegate_;
  89   scoped_ptr<ProfileDestroyObserver> profile_destroy_observer_;
  90   scoped_ptr<RecommendedApps> recommended_apps_;
  91   SpeechRecognitionState state_;
  92   ObserverList<StartPageObserver> observers_;
  93   bool speech_button_toggled_manually_;
  94   bool speech_result_obtained_;
  95
  96   bool webui_finished_loading_;
  97   std::vector<base::Closure> pending_webui_callbacks_;
  98
  99   DISALLOW_COPY_AND_ASSIGN(StartPageService);
 100 };
 101
 102 }  // namespace app_list
 103
 104 #endif  // CHROME_BROWSER_UI_APP_LIST_START_PAGE_SERVICE_H_