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// Copyright (c) 2006-2009 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_DOM_UI_MOST_VISITED_HANDLER_H_
#define CHROME_BROWSER_DOM_UI_MOST_VISITED_HANDLER_H_
#include <string>
#include <vector>
#include "chrome/browser/cancelable_request.h"
#include "chrome/browser/dom_ui/dom_ui.h"
#include "chrome/common/notification_observer.h"
#include "chrome/common/notification_registrar.h"
#include "googleurl/src/gurl.h"
class DictionaryValue;
class PageUsageData;
class PrefService;
class Value;
// The handler for Javascript messages related to the "most visited" view.
class MostVisitedHandler : public DOMMessageHandler,
public NotificationObserver {
public:
// This struct is used when getting the pre-populated pages in case the user
// hasn't filled up his most visited pages.
struct MostVisitedPage {
std::wstring title;
GURL url;
GURL thumbnail_url;
GURL favicon_url;
};
MostVisitedHandler() : url_blacklist_(NULL), pinned_urls_(NULL) {}
virtual ~MostVisitedHandler() { }
// DOMMessageHandler override and implementation.
virtual DOMMessageHandler* Attach(DOMUI* dom_ui);
virtual void RegisterMessages();
// Callback for the "getMostVisited" message.
void HandleGetMostVisited(const Value* value);
// Callback for the "blacklistURLFromMostVisited" message.
void HandleBlacklistURL(const Value* url);
// Callback for the "removeURLsFromMostVisitedBlacklist" message.
void HandleRemoveURLsFromBlacklist(const Value* url);
// Callback for the "clearMostVisitedURLsBlacklist" message.
void HandleClearBlacklist(const Value* url);
// Callback for the "addPinnedURL" message.
void HandleAddPinnedURL(const Value* value);
// Callback for the "removePinnedURL" message.
void HandleRemovePinnedURL(const Value* value);
// NotificationObserver implementation.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
const std::vector<GURL>& most_visited_urls() const {
return most_visited_urls_;
}
static void RegisterUserPrefs(PrefService* prefs);
private:
// Callback from the history system when the most visited list is available.
void OnSegmentUsageAvailable(CancelableRequestProvider::Handle handle,
std::vector<PageUsageData*>* data);
// Puts the passed URL in the blacklist (so it does not show as a thumbnail).
void BlacklistURL(const GURL& url);
// Returns the key used in url_blacklist_ and pinned_urls_ for the passed
// |url|.
std::wstring GetDictionaryKeyForURL(const std::string& url);
// Gets the page data for a pinned URL at a given index. This returns
// true if found.
const bool GetPinnedURLAtIndex(const int index, MostVisitedPage* page);
void AddPinnedURL(const MostVisitedPage& page, int index);
void RemovePinnedURL(const GURL& url);
static std::vector<MostVisitedPage> GetPrePopulatedPages();
NotificationRegistrar registrar_;
// Our consumer for the history service.
CancelableRequestConsumerTSimple<PageUsageData*> cancelable_consumer_;
// The most visited URLs, in priority order.
// Only used for matching up clicks on the page to which most visited entry
// was clicked on for metrics purposes.
std::vector<GURL> most_visited_urls_;
// The URL blacklist: URLs we do not want to show in the thumbnails list. It
// is a dictionary for quick access (it associates a dummy boolean to the URL
// string).
DictionaryValue* url_blacklist_;
// This is a dictionary for the pinned URLs for the the most visited part of
// the new tab page. The key of the dictionary is a hash of the URL and the
// value is a dictionary with title, url and index.
DictionaryValue* pinned_urls_;
DISALLOW_COPY_AND_ASSIGN(MostVisitedHandler);
};
#endif // CHROME_BROWSER_DOM_UI_MOST_VISITED_HANDLER_H_
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