user_image_screen.h revision 5d1f7b1de12d16ceb2c938c56701a3e8bfa558f7 
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_CHROMEOS_LOGIN_SCREENS_USER_IMAGE_SCREEN_H_
6#define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_IMAGE_SCREEN_H_
7
8#include "base/compiler_specific.h"
9#include "base/memory/scoped_ptr.h"
10#include "base/memory/weak_ptr.h"
11#include "chrome/browser/chromeos/login/screens/user_image_screen_actor.h"
12#include "chrome/browser/chromeos/login/screens/wizard_screen.h"
13#include "chrome/browser/chromeos/login/user.h"
14#include "chrome/browser/chromeos/login/user_image_sync_observer.h"
15#include "chrome/browser/image_decoder.h"
16#include "content/public/browser/notification_observer.h"
17#include "content/public/browser/notification_registrar.h"
18
19namespace base {
20class Timer;
21class Value;
22};
23
24namespace policy {
25class PolicyChangeRegistrar;
26}
27
28namespace chromeos {
29
30class UserImageScreen: public WizardScreen,
31                       public UserImageScreenActor::Delegate,
32                       public ImageDecoder::Delegate,
33                       public content::NotificationObserver,
34                       public UserImageSyncObserver::Observer {
35 public:
36  UserImageScreen(ScreenObserver* screen_observer,
37                  UserImageScreenActor* actor);
38  virtual ~UserImageScreen();
39
40  // Indicates whether profile picture is enabled for given user.
41  void SetProfilePictureEnabled(bool support_profile_picture);
42  // Sets |user_id| of user that would have picture updated.
43  void SetUserID(const std::string& user_id);
44
45  // WizardScreen implementation:
46  virtual void PrepareToShow() OVERRIDE;
47  virtual void Show() OVERRIDE;
48  virtual void Hide() OVERRIDE;
49  virtual std::string GetName() const OVERRIDE;
50
51  // UserImageScreenActor::Delegate implementation:
52  virtual void OnScreenReady() OVERRIDE;
53  virtual void OnPhotoTaken(const std::string& raw_data) OVERRIDE;
54  virtual void CheckCameraPresence() OVERRIDE;
55  virtual void OnImageSelected(const std::string& image_url,
56                               const std::string& image_type,
57                               bool is_user_selection) OVERRIDE;
58  virtual void OnImageAccepted() OVERRIDE;
59  virtual void OnActorDestroyed(UserImageScreenActor* actor) OVERRIDE;
60
61  virtual bool profile_picture_absent() OVERRIDE;
62  virtual int selected_image() OVERRIDE;
63  virtual std::string profile_picture_data_url() OVERRIDE;
64
65  // content::NotificationObserver implementation:
66  virtual void Observe(int type,
67                       const content::NotificationSource& source,
68                       const content::NotificationDetails& details) OVERRIDE;
69
70  // ImageDecoder::Delegate implementation:
71  virtual void OnImageDecoded(const ImageDecoder* decoder,
72                              const SkBitmap& decoded_image) OVERRIDE;
73  virtual void OnDecodeImageFailed(const ImageDecoder* decoder) OVERRIDE;
74
75  // UserImageSyncObserver::Observer implementation:
76  virtual void OnInitialSync(bool local_image_updated) OVERRIDE;
77
78  bool user_selected_image() const { return user_has_selected_image_; }
79
80 private:
81  // Called when whaiting for sync timed out.
82  void OnSyncTimeout();
83
84  bool IsWaitingForSync() const;
85
86  // Called when the policy::key::kUserAvatarImage policy changes while the
87  // screen is being shown. If the policy is set, closes the screen because the
88  // user is not allowed to override a policy-set image.
89  void OnUserImagePolicyChanged(const base::Value* previous,
90                                const base::Value* current);
91
92  // Returns current user.
93  const User* GetUser();
94
95  // Returns UserImageManager for the current user.
96  UserImageManager* GetUserImageManager();
97
98  // Returns UserImageSyncObserver for the current user.
99  UserImageSyncObserver* GetSyncObserver();
100
101  // Called when the camera presence check has been completed.
102  void OnCameraPresenceCheckDone();
103
104  // Called when it's decided not to skip the screen.
105  void HideCurtain();
106
107  // Closes the screen.
108  void ExitScreen();
109
110  content::NotificationRegistrar notification_registrar_;
111
112  scoped_ptr<policy::PolicyChangeRegistrar> policy_registrar_;
113
114  UserImageScreenActor* actor_;
115
116  base::WeakPtrFactory<UserImageScreen> weak_factory_;
117
118  // Last ImageDecoder instance used to decode an image blob received by
119  // HandlePhotoTaken.
120  scoped_refptr<ImageDecoder> image_decoder_;
121
122  // Last user photo, if taken.
123  gfx::ImageSkia user_photo_;
124
125  // If |true|, decoded photo should be immediately accepeted (i.e., both
126  // HandleTakePhoto and HandleImageAccepted have already been called but we're
127  // still waiting for  photo image decoding to finish.
128  bool accept_photo_after_decoding_;
129
130  // Index of the selected user image.
131  int selected_image_;
132
133  bool profile_picture_enabled_;
134
135  // Encoded profile picture.
136  std::string profile_picture_data_url_;
137
138  // True if user has no custom profile picture.
139  bool profile_picture_absent_;
140
141  std::string user_id_;
142
143  // Timer used for waiting for user image sync.
144  scoped_ptr<base::Timer> sync_timer_;
145
146  // If screen ready to be shown.
147  bool is_screen_ready_;
148
149  // True if user has explicitly selected some image.
150  bool user_has_selected_image_;
151
152  // True if camera was available last time.
153  bool was_camera_present_;
154
155  DISALLOW_COPY_AND_ASSIGN(UserImageScreen);
156};
157
158}  // namespace chromeos
159
160#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_IMAGE_SCREEN_H_
161