chrome/browser/ui/webui/ntp/new_tab_page_sync_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_NEW_TAB_PAGE_SYNC_HANDLER_H_
   6 #define CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_PAGE_SYNC_HANDLER_H_
   7
   8 #include <string>
   9
  10 #include "base/prefs/pref_change_registrar.h"
  11 #include "chrome/browser/sync/profile_sync_service.h"
  12 #include "chrome/browser/sync/sync_ui_util.h"
  13 #include "content/public/browser/web_ui_message_handler.h"
  14
  15 namespace base {
  16 class ListValue;
  17 }
  18
  19 // Sends sync-state changes to the New Tab Page for UI updating and forwards
  20 // link clicks on the page to the sync service.
  21 class NewTabPageSyncHandler : public content::WebUIMessageHandler,
  22                               public ProfileSyncServiceObserver {
  23  public:
  24   NewTabPageSyncHandler();
  25   virtual ~NewTabPageSyncHandler();
  26
  27   // WebUIMessageHandler implementation.
  28   virtual void RegisterMessages() OVERRIDE;
  29
  30   // Callback for "GetSyncMessage".
  31   void HandleGetSyncMessage(const base::ListValue* args);
  32   // Callback for "SyncLinkClicked".
  33   void HandleSyncLinkClicked(const base::ListValue* args);
  34
  35   // ProfileSyncServiceObserver
  36   virtual void OnStateChanged() OVERRIDE;
  37
  38   void OnSigninAllowedPrefChange();
  39
  40  private:
  41   friend class MockNewTabPageSyncHandler;
  42   FRIEND_TEST_ALL_PREFIXES(NewTabPageSyncHandlerBrowserTest,
  43                            ChangeSigninAllowedToFalse);
  44
  45   enum MessageType {
  46     HIDE,
  47     SYNC_ERROR,
  48     SYNC_PROMO
  49   };
  50   // Helper to invoke the |syncMessageChanged| JS function on the new tab page.
  51   virtual void SendSyncMessageToPage(MessageType type,
  52                                      std::string msg, std::string linktext);
  53
  54   // Helper to query the sync service and figure out what to send to
  55   // the page, and send it via SendSyncMessageToPage.
  56   // NOTE: precondition: sync must be enabled.
  57   void BuildAndSendSyncStatus();
  58
  59   // Helper to send a message to the NNTP which hides the sync section.
  60   void HideSyncStatusSection();
  61
  62   // Helper to convert from a sync status message type to an NTP specific one.
  63   static MessageType FromSyncStatusMessageType(
  64       sync_ui_util::MessageType type);
  65
  66   // Cached pointer to ProfileSyncService.
  67   ProfileSyncService* sync_service_;
  68
  69   PrefChangeRegistrar profile_pref_registrar_;
  70
  71   // Used to make sure we don't register ourselves twice if the user refreshes
  72   // the new tab page.
  73   bool waiting_for_initial_page_load_;
  74
  75   DISALLOW_COPY_AND_ASSIGN(NewTabPageSyncHandler);
  76 };
  77
  78 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_PAGE_SYNC_HANDLER_H_