content/browser/background_sync/background_sync_network_observer.cc

   1 // Copyright 2015 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/background_sync/background_sync_network_observer.h"
   6
   7 #include "content/public/browser/browser_thread.h"
   8
   9 namespace content {
  10
  11 BackgroundSyncNetworkObserver::BackgroundSyncNetworkObserver(
  12     const base::Closure& network_changed_callback)
  13     : connection_type_(net::NetworkChangeNotifier::GetConnectionType()),
  14       network_changed_callback_(network_changed_callback) {
  15   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  16
  17   net::NetworkChangeNotifier::AddNetworkChangeObserver(this);
  18 }
  19
  20 BackgroundSyncNetworkObserver::~BackgroundSyncNetworkObserver() {
  21   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  22
  23   net::NetworkChangeNotifier::RemoveNetworkChangeObserver(this);
  24 }
  25
  26 bool BackgroundSyncNetworkObserver::NetworkSufficient(
  27     SyncNetworkState network_state) {
  28   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  29
  30   switch (network_state) {
  31     case NETWORK_STATE_ANY:
  32       return true;
  33     case NETWORK_STATE_AVOID_CELLULAR:
  34       // Note that this returns true for CONNECTION_UNKNOWN to avoid never
  35       // firing.
  36       return connection_type_ != net::NetworkChangeNotifier::CONNECTION_NONE &&
  37              !net::NetworkChangeNotifier::IsConnectionCellular(
  38                  connection_type_);
  39     case NETWORK_STATE_ONLINE:
  40       return connection_type_ != net::NetworkChangeNotifier::CONNECTION_NONE;
  41   }
  42
  43   NOTREACHED();
  44   return false;
  45 }
  46
  47 void BackgroundSyncNetworkObserver::NotifyNetworkChanged() {
  48   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  49
  50   base::MessageLoop::current()->PostTask(FROM_HERE, network_changed_callback_);
  51 }
  52
  53 void BackgroundSyncNetworkObserver::OnNetworkChanged(
  54     net::NetworkChangeNotifier::ConnectionType connection_type) {
  55   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  56
  57   if (connection_type == connection_type_)
  58     return;
  59
  60   connection_type_ = connection_type;
  61   NotifyNetworkChanged();
  62 }
  63
  64 }  // namespace content