1// Copyright 2014 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_HISTORY_CHROME_HISTORY_CLIENT_H_ 6#define CHROME_BROWSER_HISTORY_CHROME_HISTORY_CLIENT_H_ 7 8#include "base/macros.h" 9#include "components/history/core/browser/history_client.h" 10#include "components/history/core/browser/top_sites_observer.h" 11 12class BookmarkModel; 13class Profile; 14 15namespace history { 16class TopSites; 17} 18 19// This class implements history::HistoryClient to abstract operations that 20// depend on Chrome environment. 21class ChromeHistoryClient : public history::HistoryClient, 22 public history::TopSitesObserver { 23 public: 24 explicit ChromeHistoryClient(BookmarkModel* bookmark_model, 25 Profile* profile, 26 history::TopSites* top_sites); 27 virtual ~ChromeHistoryClient(); 28 29 // history::HistoryClient: 30 virtual void BlockUntilBookmarksLoaded() OVERRIDE; 31 virtual bool IsBookmarked(const GURL& url) OVERRIDE; 32 virtual void GetBookmarks( 33 std::vector<history::URLAndTitle>* bookmarks) OVERRIDE; 34 virtual void NotifyProfileError(sql::InitStatus init_status) OVERRIDE; 35 virtual bool ShouldReportDatabaseError() OVERRIDE; 36 37 // KeyedService: 38 virtual void Shutdown() OVERRIDE; 39 40 // TopSitesObserver: 41 virtual void TopSitesLoaded(history::TopSites* top_sites) OVERRIDE; 42 virtual void TopSitesChanged(history::TopSites* top_sites) OVERRIDE; 43 44 private: 45 // The BookmarkModel, this should outlive ChromeHistoryClient. 46 BookmarkModel* bookmark_model_; 47 Profile* profile_; 48 // The TopSites object is owned by the Profile (see 49 // chrome/browser/profiles/profile_impl.h) 50 // and lazily constructed by the getter. 51 // ChromeHistoryClient is a KeyedService linked to the Profile lifetime by the 52 // ChromeHistoryClientFactory (which is a BrowserContextKeyedServiceFactory). 53 // Before the Profile is destroyed, all the KeyedService Shutdown methods are 54 // called, and the Profile is fully constructed before any of the KeyedService 55 // can be constructed. The TopSites does not use the HistoryService nor the 56 // HistoryClient during construction (it uses it later, but supports getting 57 // an NULL pointer). 58 history::TopSites* top_sites_; 59 60 DISALLOW_COPY_AND_ASSIGN(ChromeHistoryClient); 61}; 62 63#endif // CHROME_BROWSER_HISTORY_CHROME_HISTORY_CLIENT_H_ 64