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

   1 // Copyright (c) 2012 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_HANDLER_H_
   6 #define CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_PAGE_HANDLER_H_
   7
   8 #include "base/memory/weak_ptr.h"
   9 #include "base/values.h"
  10 #include "chrome/browser/chrome_notification_types.h"
  11 #include "content/public/browser/web_ui_message_handler.h"
  12
  13 class PrefRegistrySimple;
  14 class Profile;
  15
  16 namespace user_prefs {
  17 class PrefRegistrySyncable;
  18 }
  19
  20 // Handler for general New Tab Page functionality that does not belong in a
  21 // more specialized handler.
  22 class NewTabPageHandler : public content::WebUIMessageHandler,
  23                           public base::SupportsWeakPtr<NewTabPageHandler> {
  24  public:
  25   NewTabPageHandler();
  26
  27   // Register NTP per-profile preferences.
  28   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
  29
  30   // Registers values (strings etc.) for the page.
  31   static void GetLocalizedValues(Profile* profile,
  32       base::DictionaryValue* values);
  33
  34  private:
  35   ~NewTabPageHandler() override;
  36
  37   // WebUIMessageHandler implementation.
  38   void RegisterMessages() override;
  39
  40   // Callback for "notificationPromoClosed". No arguments.
  41   void HandleNotificationPromoClosed(const base::ListValue* args);
  42
  43   // Callback for "notificationPromoViewed". No arguments.
  44   void HandleNotificationPromoViewed(const base::ListValue* args);
  45
  46   // Callback for "notificationPromoLinkClicked". No arguments.
  47   void HandleNotificationPromoLinkClicked(const base::ListValue* args);
  48
  49   // Callback for "bubblePromoClosed". No arguments.
  50   void HandleBubblePromoClosed(const base::ListValue* args);
  51
  52   // Callback for "bubblePromoViewed". No arguments.
  53   void HandleBubblePromoViewed(const base::ListValue* args);
  54
  55   // Callback for "bubblePromoLinkClicked". No arguments.
  56   void HandleBubblePromoLinkClicked(const base::ListValue* args);
  57
  58   // Callback for "pageSelected".
  59   void HandlePageSelected(const base::ListValue* args);
  60
  61   // Tracks the number of times the user has switches pages (for UMA).
  62   size_t page_switch_count_;
  63
  64   // The purpose of this enum is to track which page on the NTP is showing.
  65   // The lower 10 bits of kNtpShownPage are used for the index within the page
  66   // group, and the rest of the bits are used for the page group ID (defined
  67   // here).
  68   static const int kPageIdOffset = 10;
  69   enum {
  70     INDEX_MASK = (1 << kPageIdOffset) - 1,
  71     APPS_PAGE_ID = 2 << kPageIdOffset,
  72     LAST_PAGE_ID = APPS_PAGE_ID,
  73   };
  74   static const int kHistogramEnumerationMax =
  75       (LAST_PAGE_ID >> kPageIdOffset) + 1;
  76
  77   // Helper to send out promo resource change notification.
  78   void Notify(chrome::NotificationType notification_type);
  79
  80   DISALLOW_COPY_AND_ASSIGN(NewTabPageHandler);
  81 };
  82
  83 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_PAGE_HANDLER_H_