Upstream version 5.34.104.0
[platform/framework/web/crosswalk.git] / src / 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   SpeechRecognitionState state() { return state_; }
52   void OnSpeechResult(const base::string16& query, bool is_final);
53   void OnSpeechSoundLevelChanged(int16 level);
54   void OnSpeechRecognitionStateChanged(SpeechRecognitionState new_state);
55
56  private:
57   friend class StartPageServiceFactory;
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   SpeechRecognitionState state_;
80   ObserverList<StartPageObserver> observers_;
81   bool speech_button_toggled_manually_;
82   bool speech_result_obtained_;
83
84   DISALLOW_COPY_AND_ASSIGN(StartPageService);
85 };
86
87 }  // namespace app_list
88
89 #endif  // CHROME_BROWSER_UI_APP_LIST_START_PAGE_SERVICE_H_