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      1 // Copyright (c) 2011 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_CHROMEOS_LOGIN_BASE_LOGIN_DISPLAY_HOST_H_
      6 #define CHROME_BROWSER_CHROMEOS_LOGIN_BASE_LOGIN_DISPLAY_HOST_H_
      7 #pragma once
      8 
      9 #include <string>
     10 
     11 #include "base/memory/scoped_ptr.h"
     12 #include "chrome/browser/chromeos/login/login_display.h"
     13 #include "chrome/browser/chromeos/login/login_display_host.h"
     14 #include "content/common/notification_observer.h"
     15 #include "content/common/notification_registrar.h"
     16 #include "ui/gfx/rect.h"
     17 
     18 class WizardController;
     19 
     20 namespace views {
     21 class Widget;
     22 }
     23 
     24 namespace chromeos {
     25 
     26 class ExistingUserController;
     27 
     28 // An abstract base class that defines OOBE/login screen host.
     29 // It encapsulates controllers, background integration and flow.
     30 class BaseLoginDisplayHost : public LoginDisplayHost,
     31                              public NotificationObserver {
     32  public:
     33   explicit BaseLoginDisplayHost(const gfx::Rect& background_bounds);
     34   virtual ~BaseLoginDisplayHost();
     35 
     36   // Returns the default LoginDispalyHost instance if it has been created.
     37   static LoginDisplayHost* default_host() {
     38     return default_host_;
     39   }
     40 
     41   // LoginDisplayHost implementation:
     42   virtual void OnSessionStart();
     43   virtual void StartWizard(
     44       const std::string& first_screen_name,
     45       const GURL& start_url);
     46   virtual void StartSignInScreen();
     47 
     48   const gfx::Rect& background_bounds() const { return background_bounds_; }
     49 
     50  private:
     51   // NotificationObserver implementation:
     52   virtual void Observe(NotificationType type,
     53                        const NotificationSource& source,
     54                        const NotificationDetails& details);
     55 
     56   // Used to calculate position of the screens and background.
     57   gfx::Rect background_bounds_;
     58 
     59   NotificationRegistrar registrar_;
     60 
     61   // Default LoginDisplayHost.
     62   static LoginDisplayHost* default_host_;
     63 
     64   // Sign in screen controller.
     65   scoped_ptr<ExistingUserController> sign_in_controller_;
     66 
     67   // OOBE and some screens (camera, recovery) controller.
     68   scoped_ptr<WizardController> wizard_controller_;
     69 
     70   DISALLOW_COPY_AND_ASSIGN(BaseLoginDisplayHost);
     71 };
     72 
     73 }  // namespace chromeos
     74 
     75 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_BASE_LOGIN_DISPLAY_HOST_H_
     76