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// Copyright 2014 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 COMPONENTS_POWER_ORIGIN_POWER_MAP_H_
#define COMPONENTS_POWER_ORIGIN_POWER_MAP_H_
#include <map>
#include "base/callback_list.h"
#include "components/keyed_service/core/keyed_service.h"
#include "url/gurl.h"
namespace power {
// Tracks app and website origins and how much power they are consuming while
// running.
class OriginPowerMap : public KeyedService {
public:
typedef std::map<GURL, int> PercentOriginMap;
typedef base::CallbackList<void(void)>::Subscription Subscription;
OriginPowerMap();
virtual ~OriginPowerMap();
// Returns the integer percentage usage of the total power consumed by a
// given URL's origin.
int GetPowerForOrigin(const GURL& url);
// Adds a certain amount of power consumption to a given URL's origin.
// |power| is a platform-specific heuristic estimating power consumption.
void AddPowerForOrigin(const GURL& url, double power);
// Returns a map of all origins to the integer percentage usage of power
// consumed.
PercentOriginMap GetPercentOriginMap();
// Adds a callback for the completion of a round of updates to |origin_map_|.
scoped_ptr<Subscription> AddPowerConsumptionUpdatedCallback(
const base::Closure& callback);
// Notifies observers to let them know that the origin power map has finished
// updating for all origins this cycle.
void OnAllOriginsUpdated();
// Clears all URLs out of the map.
void ClearOriginMap();
private:
// OriginMap maps a URL to the amount of power consumed by the URL using the
// same units as |total_consumed_|.
typedef std::map<GURL, double> OriginMap;
OriginMap origin_map_;
// Total amount of power consumed using units determined by
// the power heuristics available to the platform.
double total_consumed_;
base::CallbackList<void(void)> callback_list_;
DISALLOW_COPY_AND_ASSIGN(OriginPowerMap);
};
} // namespace power
#endif // COMPONENTS_POWER_ORIGIN_POWER_MAP_H_