1 // Copyright 2013 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 CONTENT_BROWSER_GEOLOCATION_WIFI_POLLING_POLICY_H_ 6 #define CONTENT_BROWSER_GEOLOCATION_WIFI_POLLING_POLICY_H_ 7 8 namespace content { 9 10 // Allows sharing and mocking of the update polling policy function. 11 class WifiPollingPolicy { 12 public: WifiPollingPolicy()13 WifiPollingPolicy() {} ~WifiPollingPolicy()14 virtual ~WifiPollingPolicy() {} 15 // Calculates the new polling interval for wiFi scans, given the previous 16 // interval and whether the last scan produced new results. 17 virtual void UpdatePollingInterval(bool scan_results_differ) = 0; 18 virtual int PollingInterval() = 0; 19 virtual int NoWifiInterval() = 0; 20 21 private: 22 DISALLOW_COPY_AND_ASSIGN(WifiPollingPolicy); 23 }; 24 25 // Generic polling policy, constants are compile-time parameterized to allow 26 // tuning on a per-platform basis. 27 template<int DEFAULT_INTERVAL, 28 int NO_CHANGE_INTERVAL, 29 int TWO_NO_CHANGE_INTERVAL, 30 int NO_WIFI_INTERVAL> 31 class GenericWifiPollingPolicy : public WifiPollingPolicy { 32 public: GenericWifiPollingPolicy()33 GenericWifiPollingPolicy() : polling_interval_(DEFAULT_INTERVAL) {} 34 // WifiPollingPolicy UpdatePollingInterval(bool scan_results_differ)35 virtual void UpdatePollingInterval(bool scan_results_differ) { 36 if (scan_results_differ) { 37 polling_interval_ = DEFAULT_INTERVAL; 38 } else if (polling_interval_ == DEFAULT_INTERVAL) { 39 polling_interval_ = NO_CHANGE_INTERVAL; 40 } else { 41 DCHECK(polling_interval_ == NO_CHANGE_INTERVAL || 42 polling_interval_ == TWO_NO_CHANGE_INTERVAL); 43 polling_interval_ = TWO_NO_CHANGE_INTERVAL; 44 } 45 } PollingInterval()46 virtual int PollingInterval() { return polling_interval_; } NoWifiInterval()47 virtual int NoWifiInterval() { return NO_WIFI_INTERVAL; } 48 49 private: 50 int polling_interval_; 51 }; 52 53 } // namespace content 54 55 #endif // CONTENT_BROWSER_GEOLOCATION_WIFI_POLLING_POLICY_H_ 56