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_HISTORY_UI_H_ 6 #define CHROME_BROWSER_UI_WEBUI_HISTORY_UI_H_ 7 8 #include <string> 9 10 #include "base/memory/weak_ptr.h" 11 #include "base/strings/string16.h" 12 #include "base/task/cancelable_task_tracker.h" 13 #include "base/timer/timer.h" 14 #include "base/values.h" 15 #include "chrome/browser/history/history_service.h" 16 #include "chrome/browser/history/web_history_service.h" 17 #include "content/public/browser/notification_registrar.h" 18 #include "content/public/browser/web_ui_controller.h" 19 #include "content/public/browser/web_ui_message_handler.h" 20 21 class BookmarkModel; 22 class ProfileSyncService; 23 class SupervisedUserService; 24 25 // The handler for Javascript messages related to the "history" view. 26 class BrowsingHistoryHandler : public content::WebUIMessageHandler, 27 public content::NotificationObserver { 28 public: 29 // Represents a history entry to be shown to the user, representing either 30 // a local or remote visit. A single entry can represent multiple visits, 31 // since only the most recent visit on a particular day is shown. 32 struct HistoryEntry { 33 // Values indicating whether an entry represents only local visits, only 34 // remote visits, or a mixture of both. 35 enum EntryType { 36 EMPTY_ENTRY = 0, 37 LOCAL_ENTRY, 38 REMOTE_ENTRY, 39 COMBINED_ENTRY 40 }; 41 42 HistoryEntry(EntryType type, const GURL& url, const base::string16& title, 43 base::Time time, const std::string& client_id, 44 bool is_search_result, const base::string16& snippet, 45 bool blocked_visit, const std::string& accept_languages); 46 HistoryEntry(); 47 virtual ~HistoryEntry(); 48 49 // Formats this entry's URL and title and adds them to |result|. 50 void SetUrlAndTitle(base::DictionaryValue* result) const; 51 52 // Converts the entry to a DictionaryValue to be owned by the caller. 53 scoped_ptr<base::DictionaryValue> ToValue( 54 BookmarkModel* bookmark_model, 55 SupervisedUserService* supervised_user_service, 56 const ProfileSyncService* sync_service) const; 57 58 // Comparison function for sorting HistoryEntries from newest to oldest. 59 static bool SortByTimeDescending( 60 const HistoryEntry& entry1, const HistoryEntry& entry2); 61 62 // The type of visits this entry represents: local, remote, or both. 63 EntryType entry_type; 64 65 GURL url; 66 base::string16 title; // Title of the entry. May be empty. 67 68 // The time of the entry. Usually this will be the time of the most recent 69 // visit to |url| on a particular day as defined in the local timezone. 70 base::Time time; 71 72 // The sync ID of the client on which the most recent visit occurred. 73 std::string client_id; 74 75 // Timestamps of all local or remote visits the same URL on the same day. 76 std::set<int64> all_timestamps; 77 78 // If true, this entry is a search result. 79 bool is_search_result; 80 81 // The entry's search snippet, if this entry is a search result. 82 base::string16 snippet; 83 84 // Whether this entry was blocked when it was attempted. 85 bool blocked_visit; 86 87 // kAcceptLanguages pref value. 88 std::string accept_languages; 89 }; 90 91 BrowsingHistoryHandler(); 92 virtual ~BrowsingHistoryHandler(); 93 94 // WebUIMessageHandler implementation. 95 virtual void RegisterMessages() OVERRIDE; 96 97 // Handler for the "queryHistory" message. 98 void HandleQueryHistory(const base::ListValue* args); 99 100 // Handler for the "removeVisits" message. 101 void HandleRemoveVisits(const base::ListValue* args); 102 103 // Handler for "clearBrowsingData" message. 104 void HandleClearBrowsingData(const base::ListValue* args); 105 106 // Handler for "removeBookmark" message. 107 void HandleRemoveBookmark(const base::ListValue* args); 108 109 // content::NotificationObserver implementation. 110 virtual void Observe(int type, 111 const content::NotificationSource& source, 112 const content::NotificationDetails& details) OVERRIDE; 113 114 // Merges duplicate entries from the query results, only retaining the most 115 // recent visit to a URL on a particular day. That visit contains the 116 // timestamps of the other visits. 117 static void MergeDuplicateResults( 118 std::vector<BrowsingHistoryHandler::HistoryEntry>* results); 119 120 private: 121 // The range for which to return results: 122 // - ALLTIME: allows access to all the results in a paginated way. 123 // - WEEK: the last 7 days. 124 // - MONTH: the last calendar month. 125 enum Range { 126 ALL_TIME = 0, 127 WEEK = 1, 128 MONTH = 2 129 }; 130 131 // Core implementation of history querying. 132 void QueryHistory(base::string16 search_text, 133 const history::QueryOptions& options); 134 135 // Combines the query results from the local history database and the history 136 // server, and sends the combined results to the front end. 137 void ReturnResultsToFrontEnd(); 138 139 // Callback from |web_history_timer_| when a response from web history has 140 // not been received in time. 141 void WebHistoryTimeout(); 142 143 // Callback from the history system when a history query has completed. 144 void QueryComplete(const base::string16& search_text, 145 const history::QueryOptions& options, 146 history::QueryResults* results); 147 148 // Callback from the WebHistoryService when a query has completed. 149 void WebHistoryQueryComplete(const base::string16& search_text, 150 const history::QueryOptions& options, 151 base::TimeTicks start_time, 152 history::WebHistoryService::Request* request, 153 const base::DictionaryValue* results_value); 154 155 // Callback from the history system when visits were deleted. 156 void RemoveComplete(); 157 158 // Callback from history server when visits were deleted. 159 void RemoveWebHistoryComplete(bool success); 160 161 bool ExtractIntegerValueAtIndex( 162 const base::ListValue* value, int index, int* out_int); 163 164 // Sets the query options for a week-wide query, |offset| weeks ago. 165 void SetQueryTimeInWeeks(int offset, history::QueryOptions* options); 166 167 // Sets the query options for a monthly query, |offset| months ago. 168 void SetQueryTimeInMonths(int offset, history::QueryOptions* options); 169 170 // kAcceptLanguages pref value. 171 std::string GetAcceptLanguages() const; 172 173 content::NotificationRegistrar registrar_; 174 175 // Tracker for search requests to the history service. 176 base::CancelableTaskTracker query_task_tracker_; 177 178 // The currently-executing request for synced history results. 179 // Deleting the request will cancel it. 180 scoped_ptr<history::WebHistoryService::Request> web_history_request_; 181 182 // True if there is a pending delete requests to the history service. 183 bool has_pending_delete_request_; 184 185 // Tracker for delete requests to the history service. 186 base::CancelableTaskTracker delete_task_tracker_; 187 188 // The list of URLs that are in the process of being deleted. 189 std::set<GURL> urls_to_be_deleted_; 190 191 // The info value that is returned to the front end with the query results. 192 base::DictionaryValue results_info_value_; 193 194 // The list of query results received from the history service. 195 std::vector<HistoryEntry> query_results_; 196 197 // The list of query results received from the history server. 198 std::vector<HistoryEntry> web_history_query_results_; 199 200 // Timer used to implement a timeout on a Web History response. 201 base::OneShotTimer<BrowsingHistoryHandler> web_history_timer_; 202 203 base::WeakPtrFactory<BrowsingHistoryHandler> weak_factory_; 204 205 DISALLOW_COPY_AND_ASSIGN(BrowsingHistoryHandler); 206 }; 207 208 class HistoryUI : public content::WebUIController { 209 public: 210 explicit HistoryUI(content::WebUI* web_ui); 211 212 static base::RefCountedMemory* GetFaviconResourceBytes( 213 ui::ScaleFactor scale_factor); 214 215 private: 216 DISALLOW_COPY_AND_ASSIGN(HistoryUI); 217 }; 218 219 #endif // CHROME_BROWSER_UI_WEBUI_HISTORY_UI_H_ 220
