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_SIGNIN_LOGIN_UI_SERVICE_H_
6#define CHROME_BROWSER_UI_WEBUI_SIGNIN_LOGIN_UI_SERVICE_H_
7
8#include "base/basictypes.h"
9#include "base/observer_list.h"
10#include "base/strings/string16.h"
11#include "components/keyed_service/core/keyed_service.h"
12
13class Browser;
14class Profile;
15
16// The LoginUIService helps track per-profile information for the login related
17// UIs - for example, whether there is login UI currently on-screen.
18class LoginUIService : public KeyedService {
19 public:
20  // Various UI components implement this API to allow LoginUIService to
21  // manipulate their associated login UI.
22  class LoginUI {
23   public:
24    // Invoked when the login UI should be brought to the foreground.
25    virtual void FocusUI() = 0;
26
27    // Invoked when the login UI should be closed. This can be invoked if the
28    // user takes an action that should display new login UI.
29    virtual void CloseUI() = 0;
30   protected:
31    virtual ~LoginUI() {}
32  };
33
34  // Interface for obervers of LoginUIService.
35  class Observer {
36   public:
37    // Called when a new login UI is shown.
38    // |ui| The login UI that was just shown. Will never be null.
39    virtual void OnLoginUIShown(LoginUI* ui) {}
40
41    // Called when a login UI is closed.
42    // |ui| The login UI that was just closed; will never be null.
43    virtual void OnLoginUIClosed(LoginUI* ui) {}
44
45    // Called when the sync confirmation UI is closed. |configure_sync_first|
46    // is true if the user has requested to configure the sync settings before
47    // sync starts.
48    virtual void OnSyncConfirmationUIClosed(bool configure_sync_first) {}
49
50    // Called when a confirmation UI for untrusted signin is shown.
51    virtual void OnUntrustedLoginUIShown() {}
52
53   protected:
54    virtual ~Observer() {}
55  };
56
57  explicit LoginUIService(Profile* profile);
58  virtual ~LoginUIService();
59
60  // Gets the currently active login UI, or null if no login UI is active.
61  LoginUI* current_login_ui() const {
62    return ui_;
63  }
64
65  // |observer| The observer to add or remove; cannot be NULL.
66  void AddObserver(Observer* observer);
67  void RemoveObserver(Observer* observer);
68
69  // Sets the currently active login UI. It is illegal to call this if there is
70  // already login UI visible.
71  void SetLoginUI(LoginUI* ui);
72
73  // Called when login UI is closed. If the passed UI is the current login UI,
74  // sets current_login_ui() to null.
75  void LoginUIClosed(LoginUI* ui);
76
77  // Called when the sync settings confirmation UI is closed.
78  void SyncConfirmationUIClosed(bool configure_sync_first);
79
80  // Called when a confirmation UI for untrusted signin is shown.
81  void UntrustedLoginUIShown();
82
83  // Delegate to an existing login dialog if one exists.
84  // If not, we make a new popup dialog window, and set it to
85  // chrome://signin to ask the user to sign in to chrome.
86  void ShowLoginPopup();
87
88  // Displays login results.
89  void DisplayLoginResult(Browser* browser, const base::string16& message);
90
91  // Gets the last login result set through |DisplayLoginResult|.
92  const base::string16& GetLastLoginResult();
93
94 private:
95  // Weak pointer to the currently active login UI, or null if none.
96  LoginUI* ui_;
97  Profile* profile_;
98
99  // List of observers.
100  ObserverList<Observer> observer_list_;
101
102  base::string16 last_login_result_;
103
104  DISALLOW_COPY_AND_ASSIGN(LoginUIService);
105};
106
107#endif  // CHROME_BROWSER_UI_WEBUI_SIGNIN_LOGIN_UI_SERVICE_H_
108