chrome/browser/ui/webui/chromeos/login/network_state_informer.h

   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 #ifndef CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_STATE_INFORMER_H_
   6 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_STATE_INFORMER_H_
   7
   8 #include <map>
   9 #include <string>
  10
  11 #include "base/cancelable_callback.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/memory/ref_counted.h"
  14 #include "base/memory/weak_ptr.h"
  15 #include "base/observer_list.h"
  16 #include "chrome/browser/chromeos/login/captive_portal_window_proxy.h"
  17 #include "chrome/browser/chromeos/login/screens/error_screen_actor.h"
  18 #include "chrome/browser/chromeos/net/network_portal_detector.h"
  19 #include "chromeos/network/network_state_handler_observer.h"
  20 #include "content/public/browser/notification_observer.h"
  21 #include "content/public/browser/notification_registrar.h"
  22 #include "content/public/browser/notification_service.h"
  23
  24 namespace chromeos {
  25
  26 // Class which observes network state changes and calls registered callbacks.
  27 // State is considered changed if connection or the active network has been
  28 // changed. Also, it answers to the requests about current network state.
  29 class NetworkStateInformer
  30     : public chromeos::NetworkStateHandlerObserver,
  31       public chromeos::NetworkPortalDetector::Observer,
  32       public content::NotificationObserver,
  33       public CaptivePortalWindowProxyDelegate,
  34       public base::RefCounted<NetworkStateInformer> {
  35  public:
  36   enum State {
  37     OFFLINE = 0,
  38     ONLINE,
  39     CAPTIVE_PORTAL,
  40     CONNECTING,
  41     PROXY_AUTH_REQUIRED,
  42     UNKNOWN
  43   };
  44
  45   class NetworkStateInformerObserver {
  46    public:
  47     NetworkStateInformerObserver() {}
  48     virtual ~NetworkStateInformerObserver() {}
  49
  50     virtual void UpdateState(ErrorScreenActor::ErrorReason reason) = 0;
  51     virtual void OnNetworkReady() {}
  52   };
  53
  54   NetworkStateInformer();
  55
  56   void Init();
  57
  58   // Adds observer to be notified when network state has been changed.
  59   void AddObserver(NetworkStateInformerObserver* observer);
  60
  61   // Removes observer.
  62   void RemoveObserver(NetworkStateInformerObserver* observer);
  63
  64   // NetworkStateHandlerObserver implementation:
  65   virtual void DefaultNetworkChanged(const NetworkState* network) OVERRIDE;
  66
  67   // NetworkPortalDetector::Observer implementation:
  68   virtual void OnPortalDetectionCompleted(
  69       const NetworkState* network,
  70       const NetworkPortalDetector::CaptivePortalState& state) OVERRIDE;
  71
  72   // content::NotificationObserver implementation.
  73   virtual void Observe(int type,
  74                        const content::NotificationSource& source,
  75                        const content::NotificationDetails& details) OVERRIDE;
  76
  77   // CaptivePortalWindowProxyDelegate implementation:
  78   virtual void OnPortalDetected() OVERRIDE;
  79
  80   State state() const { return state_; }
  81   std::string network_path() const { return network_path_; }
  82   std::string network_type() const { return network_type_; }
  83
  84   static const char* StatusString(State state);
  85
  86  private:
  87   friend class base::RefCounted<NetworkStateInformer>;
  88
  89   virtual ~NetworkStateInformer();
  90
  91   bool UpdateState();
  92
  93   void UpdateStateAndNotify();
  94
  95   void SendStateToObservers(ErrorScreenActor::ErrorReason reason);
  96
  97   State state_;
  98   std::string network_path_;
  99   std::string network_type_;
 100
 101   ObserverList<NetworkStateInformerObserver> observers_;
 102   content::NotificationRegistrar registrar_;
 103
 104   base::WeakPtrFactory<NetworkStateInformer> weak_ptr_factory_;
 105 };
 106
 107 }  // namespace chromeos
 108
 109 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_NETWORK_STATE_INFORMER_H_