chrome/browser/ui/webui/ntp/ntp_login_handler.h

   1 // Copyright (c) 2011 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_WEBUI_NTP_NTP_LOGIN_HANDLER_H_
   6 #define CHROME_BROWSER_UI_WEBUI_NTP_NTP_LOGIN_HANDLER_H_
   7
   8 #include "base/prefs/pref_member.h"
   9 #include "chrome/browser/profiles/profile_info_cache_observer.h"
  10 #include "content/public/browser/web_ui_message_handler.h"
  11
  12 class Profile;
  13
  14 // The NTP login handler currently simply displays the current logged in
  15 // username at the top of the NTP (and update itself when that changes).
  16 // In the future it may expand to allow users to login from the NTP.
  17 class NTPLoginHandler : public content::WebUIMessageHandler,
  18                         public ProfileInfoCacheObserver {
  19  public:
  20   NTPLoginHandler();
  21   ~NTPLoginHandler() override;
  22
  23   // WebUIMessageHandler implementation:
  24   void RegisterMessages() override;
  25
  26   // ProfileInfoCacheObserver implementation:
  27   void OnProfileUserNameChanged(const base::FilePath& profile_path) override;
  28
  29   // Returns true if the login handler should be shown in a new tab page
  30   // for the given |profile|. |profile| must not be NULL.
  31   static bool ShouldShow(Profile* profile);
  32
  33   // Registers values (strings etc.) for the page.
  34   static void GetLocalizedValues(Profile* profile,
  35                                  base::DictionaryValue* values);
  36
  37  private:
  38   // User actions while on the NTP when clicking on or viewing the sync promo.
  39   enum NTPSignInPromoBuckets {
  40     NTP_SIGN_IN_PROMO_VIEWED,
  41     NTP_SIGN_IN_PROMO_CLICKED,
  42     NTP_SIGN_IN_PROMO_BUCKET_BOUNDARY,
  43   };
  44
  45   // Called from JS when the NTP is loaded. |args| is the list of arguments
  46   // passed from JS and should be an empty list.
  47   void HandleInitializeSyncLogin(const base::ListValue* args);
  48
  49   // Called from JS when the user clicks the login container. It shows the
  50   // appropriate UI based on the current sync state. |args| is the list of
  51   // arguments passed from JS and should be an empty list.
  52   void HandleShowSyncLoginUI(const base::ListValue* args);
  53
  54   // Records actions in SyncPromo.NTPPromo histogram.
  55   void RecordInHistogram(int type);
  56
  57   // Called from JS when the sync promo NTP bubble has been displayed. |args| is
  58   // the list of arguments passed from JS and should be an empty list.
  59   void HandleLoginMessageSeen(const base::ListValue* args);
  60
  61   // Called from JS when the user clicks on the advanced link the sync promo NTP
  62   // bubble. Use use this to navigate to the sync settings page. |args| is the
  63   // list of arguments passed from JS and should be an empty list.
  64   void HandleShowAdvancedLoginUI(const base::ListValue* args);
  65
  66   // Internal helper method
  67   void UpdateLogin();
  68
  69   BooleanPrefMember signin_allowed_pref_;
  70 };
  71
  72 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_NTP_LOGIN_HANDLER_H_