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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_PAGE_HANDLER_H_
#define CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_PAGE_HANDLER_H_
#include "base/values.h"
#include "chrome/common/chrome_notification_types.h"
#include "content/public/browser/web_ui_message_handler.h"
class PrefService;
class Profile;
// Handler for general New Tab Page functionality that does not belong in a
// more specialized handler.
class NewTabPageHandler : public content::WebUIMessageHandler {
public:
NewTabPageHandler();
virtual ~NewTabPageHandler();
// WebUIMessageHandler implementation.
virtual void RegisterMessages() OVERRIDE;
// Callback for "closeNotificationPromo".
void HandleCloseNotificationPromo(const ListValue* args);
// Callback for "notificationPromoViewed".
void HandleNotificationPromoViewed(const ListValue* args);
// Callback for "pageSelected".
void HandlePageSelected(const ListValue* args);
// Callback for "introMessageDismissed". This is called when the close button
// on the ntp4 bubble is clicked or when a NavDot is clicked.
void HandleIntroMessageDismissed(const ListValue* args);
// Callback for "handleIntroMessageSeen". No arguments. Called when the intro
// message is displayed.
void HandleIntroMessageSeen(const ListValue* args);
// Register NTP per-profile preferences.
static void RegisterUserPrefs(PrefService* prefs);
// Register NTP profile-independent preferences.
static void RegisterPrefs(PrefService* prefs);
// Registers values (strings etc.) for the page.
static void GetLocalizedValues(Profile* profile, DictionaryValue* values);
// Permanently dismiss the ntp4 bubble for new users.
static void DismissIntroMessage(PrefService* prefs);
private:
// Tracks the number of times the user has switches pages (for UMA).
size_t page_switch_count_;
// The purpose of this enum is to track which page on the NTP is showing.
// The lower 10 bits of kNTPShownPage are used for the index within the page
// group, and the rest of the bits are used for the page group ID (defined
// here).
static const int kPageIdOffset = 10;
enum {
INDEX_MASK = (1 << kPageIdOffset) - 1,
MOST_VISITED_PAGE_ID = 1 << kPageIdOffset,
APPS_PAGE_ID = 2 << kPageIdOffset,
BOOKMARKS_PAGE_ID = 3 << kPageIdOffset,
LAST_PAGE_ID = BOOKMARKS_PAGE_ID
};
static const int kHistogramEnumerationMax =
(LAST_PAGE_ID >> kPageIdOffset) + 1;
// Helper to send out promo resource change notification.
void Notify(chrome::NotificationType notification_type);
DISALLOW_COPY_AND_ASSIGN(NewTabPageHandler);
};
#endif // CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_PAGE_HANDLER_H_
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