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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 #ifndef CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_ERROR_SCREEN_HANDLER_H_
      6 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_ERROR_SCREEN_HANDLER_H_
      7 
      8 #include "base/cancelable_callback.h"
      9 #include "base/compiler_specific.h"
     10 #include "base/memory/ref_counted.h"
     11 #include "chrome/browser/chromeos/login/screens/error_screen_actor.h"
     12 #include "chrome/browser/ui/webui/chromeos/login/base_screen_handler.h"
     13 #include "chrome/browser/ui/webui/chromeos/login/network_state_informer.h"
     14 
     15 namespace base {
     16 class DictionaryValue;
     17 }
     18 
     19 namespace chromeos {
     20 
     21 class CaptivePortalWindowProxy;
     22 class NativeWindowDelegate;
     23 class NetworkStateInformer;
     24 
     25 // A class that handles the WebUI hooks in error screen.
     26 class ErrorScreenHandler : public BaseScreenHandler,
     27                            public ErrorScreenActor {
     28  public:
     29   ErrorScreenHandler(
     30       const scoped_refptr<NetworkStateInformer>& network_state_informer);
     31   virtual ~ErrorScreenHandler();
     32 
     33   // ErrorScreenActor implementation:
     34   virtual void Show(OobeDisplay::Screen parent_screen,
     35                     base::DictionaryValue* params) OVERRIDE;
     36   virtual void Hide() OVERRIDE;
     37   virtual void FixCaptivePortal() OVERRIDE;
     38   virtual void ShowCaptivePortal() OVERRIDE;
     39   virtual void HideCaptivePortal() OVERRIDE;
     40   virtual void SetUIState(ErrorScreen::UIState ui_state) OVERRIDE;
     41   virtual void SetErrorState(ErrorScreen::ErrorState error_state,
     42                              const std::string& network) OVERRIDE;
     43   virtual void AllowGuestSignin(bool allowed) OVERRIDE;
     44   virtual void AllowOfflineLogin(bool allowed) OVERRIDE;
     45 
     46  private:
     47   // Sends notification that error message is shown.
     48   void NetworkErrorShown();
     49 
     50   bool GetScreenName(OobeUI::Screen screen, std::string* name) const;
     51 
     52   // WebUI message handlers.
     53   void HandleShowCaptivePortal();
     54   void HandleHideCaptivePortal();
     55 
     56   // WebUIMessageHandler implementation:
     57   virtual void RegisterMessages() OVERRIDE;
     58 
     59   // BaseScreenHandler implementation:
     60   virtual void DeclareLocalizedValues(LocalizedValuesBuilder* builder) OVERRIDE;
     61   virtual void Initialize() OVERRIDE;
     62 
     63   // Proxy which manages showing of the window for captive portal entering.
     64   scoped_ptr<CaptivePortalWindowProxy> captive_portal_window_proxy_;
     65 
     66   // Network state informer used to keep error screen up.
     67   scoped_refptr<NetworkStateInformer> network_state_informer_;
     68 
     69   // NativeWindowDelegate used to get reference to NativeWindow.
     70   NativeWindowDelegate* native_window_delegate_;
     71 
     72   // Keeps whether screen should be shown right after initialization.
     73   bool show_on_init_;
     74 
     75   DISALLOW_COPY_AND_ASSIGN(ErrorScreenHandler);
     76 };
     77 
     78 }  // namespace chromeos
     79 
     80 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_ERROR_SCREEN_HANDLER_H_
     81