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

content/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 "content/browser/geolocation/wifi_data_provider_chromeos.h"
 
 #include "base/bind.h"
+#include "base/chromeos/chromeos_version.h"
 #include "base/utf_string_conversions.h"
-#include "chrome/browser/chromeos/cros/cros_library.h"
-#include "chrome/browser/chromeos/cros/network_library.h"
+#include "chromeos/network/cros_network_functions.h"
+#include "chromeos/network/network_state_handler.h"
 #include "content/public/browser/browser_thread.h"
+#include "third_party/cros_system_api/dbus/service_constants.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 content {
+namespace {
 
-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);
+  polling_policy_.reset(
+      new GenericPollingPolicy<kDefaultPollingIntervalMilliseconds,
+                                  kNoChangePollingIntervalMilliseconds,
+                                  kTwoNoChangePollingIntervalMilliseconds,
+                                  kNoWifiPollingIntervalMilliseconds>);
 
   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())
+  // This method could be scheduled after a ScheduleStop.
+  if (!started_)
     return;
 
   WifiData new_data;
 
-  if (!wlan_api_->GetAccessPointData(&new_data.access_point_data)) {
+  if (!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));
   }
 }
 
@@ skipping 33 matching lines @@
       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));
 }
+
+bool WifiDataProviderChromeOs::GetAccessPointData(
+    WifiData::AccessPointDataSet* result) {
+  if (!base::chromeos::IsRunningOnChromeOS()) {
+    *result = WifiData::AccessPointDataSet();
+    return true;
+  }
+
+  chromeos::WifiAccessPointVector access_points;
+  if (!chromeos::CrosGetWifiAccessPoints(&access_points))
+    return false;

[stevenjb, 2013/01/04 20:41:04]

So, this is OK, we can replace it when it has been re-factored (which I've
started work on)

+  for (size_t i = 0; i < access_points.size(); ++i) {
+    AccessPointData ap_data;
+    ap_data.mac_address = ASCIIToUTF16(access_points[i].mac_address);
+    ap_data.radio_signal_strength = access_points[i].signal_strength;
+    ap_data.channel = access_points[i].channel;
+    ap_data.signal_to_noise = access_points[i].signal_to_noise;
+    ap_data.ssid = UTF8ToUTF16(access_points[i].name);
+    result->insert(ap_data);
+  }
+  bool wifi_enabled = chromeos::NetworkStateHandler::Get()->
+      TechnologyEnabled(flimflam::kTypeWifi);

[stevenjb, 2013/01/04 20:41:04]

This is behind a flag and will crash without --enable-new-network-handlers
(chromeos::NetworkStateHandler::Get() will return NULL).

There are two choices here: a) wait for my re-factor which will work with or
without the flag, or b) write a Cros* function to do a blocking call to get the
TechnologyEnabled state.

Also: It doesn't make sense to me to generate the access point data if wifi is
not enabled; we should do this check early. Plus, won't this always return
|false| if wifi is disabled, causing the code to continuously scan? Maybe that's
not a big deal?

[jam, 2013/01/04 21:18:31]

my plan was just to wait for your refactor
sure I can move the order. i think before with NetworkLibrary this was a very
cheap check which is probably why it was written like this
joth or jknotten can confirm, but my reading of the code is that this was the
intended behavior

+  return !result->empty() || wifi_enabled;
+}
+
+// static
+template<>
+WifiDataProviderImplBase* WifiDataProvider::DefaultFactoryFunction() {
+  return new WifiDataProviderChromeOs();
+}
+
+}  // namespace content