OLD | NEW |
1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_ACCESSIBILITY_HELPER_H_ | 5 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_ACCESSIBILITY_HELPER_H_ |
6 #define CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_ACCESSIBILITY_HELPER_H_ | 6 #define CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_ACCESSIBILITY_HELPER_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include <map> | |
10 #include <vector> | |
11 | |
12 #include "base/scoped_ptr.h" | 9 #include "base/scoped_ptr.h" |
13 #include "base/singleton.h" | 10 #include "base/singleton.h" |
14 #include "chrome/browser/chromeos/login/wizard_accessibility_handler.h" | 11 #include "chrome/browser/chromeos/login/wizard_accessibility_handler.h" |
15 #include "chrome/browser/ui/views/accessible_view_helper.h" | |
16 #include "chrome/common/notification_registrar.h" | 12 #include "chrome/common/notification_registrar.h" |
17 #include "ui/base/keycodes/keyboard_codes.h" | 13 #include "ui/base/keycodes/keyboard_codes.h" |
18 | 14 |
19 class Profile; | 15 class Profile; |
20 namespace views { | 16 namespace views { |
21 class Accelerator; | 17 class Accelerator; |
22 class View; | 18 class View; |
23 } | 19 } |
24 | 20 |
25 namespace chromeos { | 21 namespace chromeos { |
26 | 22 |
27 // Class that provides convenience methods to enable accessibility for a | 23 // Class that provides convenience methods to enable accessibility for a |
28 // specified View. | 24 // specified View. |
29 class WizardAccessibilityHelper { | 25 class WizardAccessibilityHelper { |
30 public: | 26 public: |
31 // Get Singleton instance of WizardAccessibilityHelper. | 27 // Get Singleton instance of WizardAccessibilityHelper. |
32 static WizardAccessibilityHelper* GetInstance(); | 28 static WizardAccessibilityHelper* GetInstance(); |
33 | 29 |
34 // Get accelerator for enabling accessibility. | 30 // Get accelerator for enabling accessibility. |
35 static views::Accelerator GetAccelerator(); | 31 static views::Accelerator GetAccelerator(); |
36 | 32 |
37 // Enables Accessibility by setting the accessibility pref and registers | |
38 // all views in the view buffer to raise accessibility notifications, | |
39 // including the specified |view_tree|. | |
40 void EnableAccessibilityForView(views::View* view_tree); | |
41 | |
42 // Enables accessibility for the specified |view_tree| if the | |
43 // accessibility pref is already set. Otherwise the |view_tree| is | |
44 // added to a view buffer so that accessibility can be enabled for it | |
45 // later when requested. | |
46 void MaybeEnableAccessibility(views::View* view_tree); | |
47 | |
48 // Speak the given text if the accessibility pref is already set. |queue| | 33 // Speak the given text if the accessibility pref is already set. |queue| |
49 // specifies whether this utterance will be queued or spoken immediately. | 34 // specifies whether this utterance will be queued or spoken immediately. |
50 // |interruptible| specified whether this utterance can be flushed by a | 35 // |interruptible| specified whether this utterance can be flushed by a |
51 // subsequent utterance. | 36 // subsequent utterance. |
52 // TODO (chaitanyag): Change API to use string16 instead of char*. | 37 // TODO (chaitanyag): Change API to use string16 instead of char*. |
53 void MaybeSpeak(const char* str, bool queue, bool interruptible); | 38 void MaybeSpeak(const char* str, bool queue, bool interruptible); |
54 | 39 |
55 // Unregisters all accessibility notifications | 40 // Unregisters all accessibility notifications |
56 void UnregisterNotifications(); | 41 void UnregisterNotifications(); |
57 | 42 |
58 // Toggles accessibility support. If |view_tree| is null, only the | 43 // Toggles accessibility support. |
59 // access preference setting is toggled. |view_tree| has no effect while | 44 void ToggleAccessibility(); |
60 // disabling accessibility. | |
61 void ToggleAccessibility(views::View* view_tree); | |
62 | 45 |
63 private: | 46 private: |
64 friend struct DefaultSingletonTraits<WizardAccessibilityHelper>; | 47 friend struct DefaultSingletonTraits<WizardAccessibilityHelper>; |
65 | 48 |
66 WizardAccessibilityHelper(); | 49 WizardAccessibilityHelper(); |
67 | 50 |
68 virtual ~WizardAccessibilityHelper() {} | 51 virtual ~WizardAccessibilityHelper() {} |
69 | 52 |
70 void RegisterNotifications(); | 53 void RegisterNotifications(); |
71 | 54 |
72 bool IsAccessibilityEnabled(); | 55 bool IsAccessibilityEnabled(); |
73 | 56 |
74 void SetAccessibilityEnabled(bool); | 57 void SetAccessibilityEnabled(bool); |
75 | 58 |
76 static scoped_ptr<views::Accelerator> accelerator_; | 59 static scoped_ptr<views::Accelerator> accelerator_; |
77 | 60 |
78 void AddViewToBuffer(views::View* view_tree); | |
79 | |
80 std::map<views::View*, bool> views_buffer_; | |
81 | |
82 std::vector<AccessibleViewHelper*> accessible_view_helpers_; | |
83 | |
84 scoped_ptr<WizardAccessibilityHandler> accessibility_handler_; | 61 scoped_ptr<WizardAccessibilityHandler> accessibility_handler_; |
85 | 62 |
86 Profile* profile_; | 63 Profile* profile_; |
87 | 64 |
88 // Used for tracking registrations to accessibility notifications. | 65 // Used for tracking registrations to accessibility notifications. |
89 NotificationRegistrar registrar_; | 66 NotificationRegistrar registrar_; |
90 | 67 |
91 bool registered_notifications_; | 68 bool registered_notifications_; |
92 | 69 |
93 DISALLOW_COPY_AND_ASSIGN(WizardAccessibilityHelper); | 70 DISALLOW_COPY_AND_ASSIGN(WizardAccessibilityHelper); |
94 }; | 71 }; |
95 | 72 |
96 } // namespace chromeos | 73 } // namespace chromeos |
97 | 74 |
98 #endif // CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_ACCESSIBILITY_HELPER_H_ | 75 #endif // CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_ACCESSIBILITY_HELPER_H_ |
OLD | NEW |