Move wifi_data_provider_chromeos.* from chrome\browser\geolocation to content\browser\geolocation b…

chrome/browser/geolocation/wifi_data_provider_chromeos.cc

-// 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.
-
-// Provides wifi scan API binding for chromeos, using proprietary APIs.
-
-#include "chrome/browser/geolocation/wifi_data_provider_chromeos.h"
-
-#include "base/bind.h"
-#include "base/utf_string_conversions.h"
-#include "chrome/browser/chromeos/cros/cros_library.h"
-#include "chrome/browser/chromeos/cros/network_library.h"
-#include "content/public/browser/browser_thread.h"
-
-using content::AccessPointData;
-using content::BrowserThread;
-using content::GenericPollingPolicy;
-using content::PollingPolicyInterface;
-using content::WifiData;
-using content::WifiDataProvider;
-using content::WifiDataProviderCommon;
-using content::WifiDataProviderImplBase;
-
-namespace {
-// The time periods between successive polls of the wifi data.
-const int kDefaultPollingIntervalMilliseconds = 10 * 1000;  // 10s
-const int kNoChangePollingIntervalMilliseconds = 2 * 60 * 1000;  // 2 mins
-const int kTwoNoChangePollingIntervalMilliseconds = 10 * 60 * 1000;  // 10 mins
-const int kNoWifiPollingIntervalMilliseconds = 20 * 1000; // 20s
-
-WifiDataProviderImplBase* ChromeOSFactoryFunction() {
-  return new WifiDataProviderChromeOs();
-}
-
-// This global class forces code that links in this file to use that as a data
-// provider instead of the default Linux provider.
-class RegisterChromeOSWifiDataProvider {
- public:
-  RegisterChromeOSWifiDataProvider() {
-    WifiDataProvider::SetFactory(ChromeOSFactoryFunction);
-  }
-};
-
-RegisterChromeOSWifiDataProvider g_force_chrome_os_provider;
-
-}  // namespace
-
-namespace chromeos {
-namespace {
-// Wifi API binding to network_library.h, to allow reuse of the polling behavior
-// defined in WifiDataProviderCommon.
-class NetworkLibraryWlanApi : public WifiDataProviderCommon::WlanApiInterface {
- public:
-  // Does not transfer ownership, |lib| must remain valid for lifetime of
-  // this object.
-  explicit NetworkLibraryWlanApi(NetworkLibrary* lib);
-  ~NetworkLibraryWlanApi();
-
-  // WifiDataProviderCommon::WlanApiInterface
-  bool GetAccessPointData(WifiData::AccessPointDataSet* data);
-
- private:
-  NetworkLibrary* network_library_;
-
-  DISALLOW_COPY_AND_ASSIGN(NetworkLibraryWlanApi);
-};
-
-NetworkLibraryWlanApi::NetworkLibraryWlanApi(NetworkLibrary* lib)
-    : network_library_(lib) {
-  DCHECK(network_library_ != NULL);
-}
-
-NetworkLibraryWlanApi::~NetworkLibraryWlanApi() {
-}
-
-bool NetworkLibraryWlanApi::GetAccessPointData(
-    WifiData::AccessPointDataSet* result) {
-  WifiAccessPointVector access_points;
-  if (!network_library_->GetWifiAccessPoints(&access_points))
-    return false;
-  for (WifiAccessPointVector::const_iterator i = access_points.begin();
-       i != access_points.end(); ++i) {
-    AccessPointData ap_data;
-    ap_data.mac_address = ASCIIToUTF16(i->mac_address);
-    ap_data.radio_signal_strength = i->signal_strength;
-    ap_data.channel = i->channel;
-    ap_data.signal_to_noise = i->signal_to_noise;
-    ap_data.ssid = UTF8ToUTF16(i->name);
-    result->insert(ap_data);
-  }
-  return !result->empty() || network_library_->wifi_enabled();
-}
-
-}  // namespace
-}  // namespace chromeos
-
-WifiDataProviderChromeOs::WifiDataProviderChromeOs() : started_(false) {
-}
-
-WifiDataProviderChromeOs::~WifiDataProviderChromeOs() {
-}
-
-bool WifiDataProviderChromeOs::StartDataProvider() {
-  DCHECK(CalledOnClientThread());
-
-  DCHECK(polling_policy_ == NULL);
-  polling_policy_.reset(NewPollingPolicy());
-  DCHECK(polling_policy_ != NULL);
-
-  ScheduleStart();
-  return true;
-}
-
-void WifiDataProviderChromeOs::StopDataProvider() {
-  DCHECK(CalledOnClientThread());
-
-  polling_policy_.reset();
-  ScheduleStop();
-}
-
-bool WifiDataProviderChromeOs::GetData(WifiData* data) {
-  DCHECK(CalledOnClientThread());
-  DCHECK(data);
-  *data = wifi_data_;
-  return is_first_scan_complete_;
-}
-
-WifiDataProviderCommon::WlanApiInterface*
-    WifiDataProviderChromeOs::NewWlanApi(chromeos::NetworkLibrary* lib) {
-  return new chromeos::NetworkLibraryWlanApi(lib);
-}
-
-WifiDataProviderCommon::WlanApiInterface*
-    WifiDataProviderChromeOs::NewWlanApi() {
-  chromeos::CrosLibrary* cros_lib = chromeos::CrosLibrary::Get();
-  DCHECK(cros_lib);
-  return NewWlanApi(cros_lib->GetNetworkLibrary());
-}
-
-PollingPolicyInterface* WifiDataProviderChromeOs::NewPollingPolicy() {
-  return new GenericPollingPolicy<kDefaultPollingIntervalMilliseconds,
-                                  kNoChangePollingIntervalMilliseconds,
-                                  kTwoNoChangePollingIntervalMilliseconds,
-                                  kNoWifiPollingIntervalMilliseconds>;
-}
-
-void WifiDataProviderChromeOs::DoStartTaskOnUIThread() {
-  CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  wlan_api_.reset(NewWlanApi());
-  if (wlan_api_ == NULL) {
-    client_loop()->PostTask(
-        FROM_HERE, base::Bind(&WifiDataProviderChromeOs::DidStartFailed, this));
-    return;
-  }
-  DoWifiScanTaskOnUIThread();
-}
-
-void WifiDataProviderChromeOs::DoStopTaskOnUIThread() {
-  CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  wlan_api_.reset();
-}
-
-void WifiDataProviderChromeOs::DidStartFailed() {
-  CHECK(CalledOnClientThread());
-  // Error! Can't do scans, so don't try and schedule one.
-  is_first_scan_complete_ = true;
-}
-
-void WifiDataProviderChromeOs::DoWifiScanTaskOnUIThread() {
-  CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-
-  // This method could be scheduled after a DoStopTaskOnUIThread.
-  if (!wlan_api_.get())
-    return;
-
-  WifiData new_data;
-
-  if (!wlan_api_->GetAccessPointData(&new_data.access_point_data)) {
-    client_loop()->PostTask(
-        FROM_HERE,
-        base::Bind(&WifiDataProviderChromeOs::DidWifiScanTaskNoResults, this));
-  } else {
-    client_loop()->PostTask(
-        FROM_HERE,
-        base::Bind(&WifiDataProviderChromeOs::DidWifiScanTask, this, new_data));
-  }
-}
-
-void WifiDataProviderChromeOs::DidWifiScanTaskNoResults() {
-  DCHECK(CalledOnClientThread());
-  // Schedule next scan if started (StopDataProvider could have been called
-  // in between DoWifiScanTaskOnUIThread and this method).
-  if (started_)
-    ScheduleNextScan(polling_policy_->NoWifiInterval());
-  MaybeNotifyListeners(false);
-}
-
-void WifiDataProviderChromeOs::DidWifiScanTask(const WifiData& new_data) {
-  DCHECK(CalledOnClientThread());
-  bool update_available = wifi_data_.DiffersSignificantly(new_data);
-  wifi_data_ = new_data;
-  // Schedule next scan if started (StopDataProvider could have been called
-  // in between DoWifiScanTaskOnUIThread and this method).
-  if (started_) {
-    polling_policy_->UpdatePollingInterval(update_available);
-    ScheduleNextScan(polling_policy_->PollingInterval());
-  }
-  MaybeNotifyListeners(update_available);
-}
-
-void WifiDataProviderChromeOs::MaybeNotifyListeners(bool update_available) {
-  if (update_available || !is_first_scan_complete_) {
-    is_first_scan_complete_ = true;
-    NotifyListeners();
-  }
-}
-
-void WifiDataProviderChromeOs::ScheduleNextScan(int interval) {
-  DCHECK(CalledOnClientThread());
-  DCHECK(started_);
-  BrowserThread::PostDelayedTask(
-      BrowserThread::UI,
-      FROM_HERE,
-      base::Bind(&WifiDataProviderChromeOs::DoWifiScanTaskOnUIThread, this),
-      base::TimeDelta::FromMilliseconds(interval));
-}
-
-void WifiDataProviderChromeOs::ScheduleStop() {
-  DCHECK(CalledOnClientThread());
-  DCHECK(started_);
-  started_ = false;
-  BrowserThread::PostTask(
-      BrowserThread::UI,
-      FROM_HERE,
-      base::Bind(&WifiDataProviderChromeOs::DoStopTaskOnUIThread, this));
-}
-
-void WifiDataProviderChromeOs::ScheduleStart() {
-  DCHECK(CalledOnClientThread());
-  DCHECK(!started_);
-  started_ = true;
-  // Perform first scan ASAP regardless of the polling policy. If this scan
-  // fails we'll retry at a rate in line with the polling policy.
-  BrowserThread::PostTask(
-      BrowserThread::UI,
-      FROM_HERE,
-      base::Bind(&WifiDataProviderChromeOs::DoStartTaskOnUIThread, this));
-}