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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_DOM_LOGIN_DISPLAY_H_
      6 #define CHROME_BROWSER_CHROMEOS_LOGIN_DOM_LOGIN_DISPLAY_H_
      7 #pragma once
      8 
      9 #include <vector>
     10 
     11 #include "base/memory/singleton.h"
     12 #include "base/scoped_ptr.h"
     13 #include "chrome/browser/chromeos/login/login_display.h"
     14 #include "chrome/browser/chromeos/login/user_manager.h"
     15 #include "chrome/browser/ui/webui/chromeos/login/login_ui.h"
     16 
     17 namespace gfx {
     18 class Rect;
     19 }  // namespace gfx
     20 
     21 namespace chromeos {
     22 
     23 class DOMBrowser;
     24 
     25 // DOM-based login UI implementation.
     26 // This class is a Singleton. It allows the LoginDisplayHost and LoginUIHandler
     27 // to access it without having to be coupled with each other. It is created with
     28 // NULL for the delegate and a 0-size rectangle for the background
     29 // bounds. Before use these values should be set to a sane value. When done with
     30 // the object, the ExistingUserController should call Destroy and not free the
     31 // pointer, where as accessing classes should do nothing with the pointer.
     32 //
     33 // Expected order of commands to setup for LoginDisplayHost:
     34 //   DOMLoginDisplay::GetInstance();
     35 //   set_delegate(delegate);
     36 //   set_background_bounds(background_bounds());
     37 //   Init();
     38 //
     39 // Expected order of commands to setup for LoginUIHandler:
     40 //   DOMLoginDisplay::GetInstance();
     41 //   set_login_handler(this);
     42 
     43 class DOMLoginDisplay : public LoginDisplay,
     44                         public LoginUIHandlerDelegate {
     45  public:
     46   virtual ~DOMLoginDisplay();
     47 
     48   // Singleton implementation:
     49   static DOMLoginDisplay* GetInstance();
     50 
     51   // LoginDisplay implementation:
     52   virtual void Destroy() OVERRIDE;
     53   virtual void Init(const std::vector<UserManager::User>& users,
     54                     bool show_guest,
     55                     bool show_new_user) OVERRIDE;
     56   virtual void OnBeforeUserRemoved(const std::string& username) OVERRIDE;
     57   virtual void OnUserImageChanged(UserManager::User* user) OVERRIDE;
     58   virtual void OnUserRemoved(const std::string& username) OVERRIDE;
     59   virtual void OnFadeOut() OVERRIDE;
     60   virtual void SetUIEnabled(bool is_enabled) OVERRIDE;
     61   virtual void ShowError(int error_msg_id,
     62                          int login_attempts,
     63                          HelpAppLauncher::HelpTopic help_topic_id) OVERRIDE;
     64 
     65   // LoginUIHandlerDelegate
     66   virtual void Login(const std::string& username,
     67                      const std::string& password) OVERRIDE;
     68   virtual void LoginAsGuest() OVERRIDE;
     69 
     70  private:
     71   // Singleton implementation:
     72   friend struct DefaultSingletonTraits<DOMLoginDisplay>;
     73   DOMLoginDisplay();
     74 
     75   // Set of Users in the systemvisible UserControllers.
     76   std::vector<UserManager::User> users_;
     77 
     78   // Container of the screen we are displaying
     79   DOMBrowser* login_screen_;
     80 
     81   DISALLOW_COPY_AND_ASSIGN(DOMLoginDisplay);
     82 };
     83 
     84 }  // namespace chromeos
     85 
     86 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_DOM_LOGIN_DISPLAY_H_
     87