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// Copyright (c) 2012 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_HISTORY_UI_H_
#define CHROME_BROWSER_UI_WEBUI_HISTORY_UI_H_
#include <string>
#include "base/string16.h"
#include "base/timer.h"
#include "chrome/browser/common/cancelable_request.h"
#include "chrome/browser/history/history_service.h"
#include "chrome/browser/history/web_history_service.h"
#include "chrome/common/cancelable_task_tracker.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/web_ui_controller.h"
#include "content/public/browser/web_ui_message_handler.h"
#include "ui/base/layout.h"
// The handler for Javascript messages related to the "history" view.
class BrowsingHistoryHandler : public content::WebUIMessageHandler,
public content::NotificationObserver {
public:
BrowsingHistoryHandler();
virtual ~BrowsingHistoryHandler();
// WebUIMessageHandler implementation.
virtual void RegisterMessages() OVERRIDE;
// Handler for the "queryHistory" message.
void HandleQueryHistory(const base::ListValue* args);
// Handler for the "removeURLsOnOneDay" message.
void HandleRemoveURLsOnOneDay(const base::ListValue* args);
// Handler for "clearBrowsingData" message.
void HandleClearBrowsingData(const base::ListValue* args);
// Handler for "removeBookmark" message.
void HandleRemoveBookmark(const base::ListValue* args);
// content::NotificationObserver implementation.
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
private:
// The range for which to return results:
// - ALLTIME: allows access to all the results in a paginated way.
// - WEEK: the last 7 days.
// - MONTH: the last calendar month.
enum Range {
ALL_TIME = 0,
WEEK = 1,
MONTH = 2
};
// Core implementation of history querying.
void QueryHistory(string16 search_text, const history::QueryOptions& options);
// Creates a history query result value.
DictionaryValue* CreateQueryResultValue(
const GURL& url, const string16 title, base::Time visit_time,
bool is_search_result, const string16& snippet);
// Helper to send the accumulated results of the query to the front end.
void ReturnResultsToFrontEnd();
// Callback from |web_history_timer_| when a response from web history has
// not been received in time.
void WebHistoryTimeout();
// Callback from the history system when a history query has completed.
void QueryComplete(const string16& search_text,
const history::QueryOptions& options,
HistoryService::Handle request_handle,
history::QueryResults* results);
// Callback from the WebHistoryService when a query has completed.
void WebHistoryQueryComplete(const string16& search_text,
const history::QueryOptions& options,
history::WebHistoryService::Request* request,
const DictionaryValue* results_value);
// Callback from the history system when visits were deleted.
void RemoveComplete();
// Callback from history server when visits were deleted.
void RemoveWebHistoryComplete(history::WebHistoryService::Request* request,
bool success);
bool ExtractIntegerValueAtIndex(
const base::ListValue* value, int index, int* out_int);
// Set the query options for a week-wide query, |offset| weeks ago.
void SetQueryTimeInWeeks(int offset, history::QueryOptions* options);
// Sets the query options for a monthly query, |offset| months ago.
void SetQueryTimeInMonths(int offset, history::QueryOptions* options);
content::NotificationRegistrar registrar_;
// Consumer for search requests to the history service.
CancelableRequestConsumerT<int, 0> history_request_consumer_;
// The currently-executing request for synced history results.
// Deleting the request will cancel it.
scoped_ptr<history::WebHistoryService::Request> web_history_request_;
// The currently-executing delete request for synced history.
// Deleting the request will cancel it.
scoped_ptr<history::WebHistoryService::Request> web_history_delete_request_;
// Tracker for delete requests to the history service.
CancelableTaskTracker delete_task_tracker_;
// The list of URLs that are in the process of being deleted.
std::set<GURL> urls_to_be_deleted_;
// The info value that is returned to the front end with the query results.
DictionaryValue results_info_value_;
// The list of query results that is returned to the front end.
ListValue results_value_;
// Timer used to implement a timeout on a Web History response.
base::OneShotTimer<BrowsingHistoryHandler> web_history_timer_;
DISALLOW_COPY_AND_ASSIGN(BrowsingHistoryHandler);
};
class HistoryUI : public content::WebUIController {
public:
explicit HistoryUI(content::WebUI* web_ui);
// Return the URL for a given search term.
static const GURL GetHistoryURLWithSearchText(const string16& text);
static base::RefCountedMemory* GetFaviconResourceBytes(
ui::ScaleFactor scale_factor);
private:
DISALLOW_COPY_AND_ASSIGN(HistoryUI);
};
#endif // CHROME_BROWSER_UI_WEBUI_HISTORY_UI_H_
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