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| 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 #include "content/browser/geolocation/wifi_data_provider_common.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/location.h" | |
| 9 #include "base/single_thread_task_runner.h" | |
| 10 #include "base/strings/stringprintf.h" | |
| 11 #include "base/strings/utf_string_conversions.h" | |
| 12 | |
| 13 namespace content { | |
| 14 | |
| 15 base::string16 MacAddressAsString16(const uint8_t mac_as_int[6]) { | |
| 16 // mac_as_int is big-endian. Write in byte chunks. | |
| 17 // Format is XX-XX-XX-XX-XX-XX. | |
| 18 static const char* const kMacFormatString = | |
| 19 "%02x-%02x-%02x-%02x-%02x-%02x"; | |
| 20 return base::ASCIIToUTF16(base::StringPrintf(kMacFormatString, | |
| 21 mac_as_int[0], | |
| 22 mac_as_int[1], | |
| 23 mac_as_int[2], | |
| 24 mac_as_int[3], | |
| 25 mac_as_int[4], | |
| 26 mac_as_int[5])); | |
| 27 } | |
| 28 | |
| 29 WifiDataProviderCommon::WifiDataProviderCommon() | |
| 30 : is_first_scan_complete_(false), | |
| 31 weak_factory_(this) { | |
| 32 } | |
| 33 | |
| 34 WifiDataProviderCommon::~WifiDataProviderCommon() { | |
| 35 } | |
| 36 | |
| 37 void WifiDataProviderCommon::StartDataProvider() { | |
| 38 DCHECK(wlan_api_ == NULL); | |
| 39 wlan_api_.reset(NewWlanApi()); | |
| 40 if (wlan_api_ == NULL) { | |
| 41 // Error! Can't do scans, so don't try and schedule one. | |
| 42 is_first_scan_complete_ = true; | |
| 43 return; | |
| 44 } | |
| 45 | |
| 46 DCHECK(polling_policy_ == NULL); | |
| 47 polling_policy_.reset(NewPollingPolicy()); | |
| 48 DCHECK(polling_policy_ != NULL); | |
| 49 | |
| 50 // Perform first scan ASAP regardless of the polling policy. If this scan | |
| 51 // fails we'll retry at a rate in line with the polling policy. | |
| 52 ScheduleNextScan(0); | |
| 53 } | |
| 54 | |
| 55 void WifiDataProviderCommon::StopDataProvider() { | |
| 56 wlan_api_.reset(); | |
| 57 polling_policy_.reset(); | |
| 58 } | |
| 59 | |
| 60 bool WifiDataProviderCommon::GetData(WifiData* data) { | |
| 61 *data = wifi_data_; | |
| 62 // If we've successfully completed a scan, indicate that we have all of the | |
| 63 // data we can get. | |
| 64 return is_first_scan_complete_; | |
| 65 } | |
| 66 | |
| 67 void WifiDataProviderCommon::DoWifiScanTask() { | |
| 68 bool update_available = false; | |
| 69 WifiData new_data; | |
| 70 if (!wlan_api_->GetAccessPointData(&new_data.access_point_data)) { | |
| 71 ScheduleNextScan(polling_policy_->NoWifiInterval()); | |
| 72 } else { | |
| 73 update_available = wifi_data_.DiffersSignificantly(new_data); | |
| 74 wifi_data_ = new_data; | |
| 75 polling_policy_->UpdatePollingInterval(update_available); | |
| 76 ScheduleNextScan(polling_policy_->PollingInterval()); | |
| 77 } | |
| 78 if (update_available || !is_first_scan_complete_) { | |
| 79 is_first_scan_complete_ = true; | |
| 80 RunCallbacks(); | |
| 81 } | |
| 82 } | |
| 83 | |
| 84 void WifiDataProviderCommon::ScheduleNextScan(int interval) { | |
| 85 client_task_runner()->PostDelayedTask( | |
| 86 FROM_HERE, base::Bind(&WifiDataProviderCommon::DoWifiScanTask, | |
| 87 weak_factory_.GetWeakPtr()), | |
| 88 base::TimeDelta::FromMilliseconds(interval)); | |
| 89 } | |
| 90 | |
| 91 } // namespace content | |
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Chromium Code Reviews
Issue 2192683002:
Reland 2:Geolocation: move from content/browser to device/ (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master