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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 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 // A helper class that stays in sync with a preference (bool, int, real, or | 5 // A helper class that stays in sync with a preference (bool, int, real, or |
6 // string). For example: | 6 // string). For example: |
7 // | 7 // |
8 // class MyClass { | 8 // class MyClass { |
9 // public: | 9 // public: |
10 // MyClass(PrefService* prefs) { | 10 // MyClass(PrefService* prefs) { |
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46 const NotificationDetails& details); | 46 const NotificationDetails& details); |
47 | 47 |
48 void VerifyValuePrefName(); | 48 void VerifyValuePrefName(); |
49 | 49 |
50 // This methods is used to do the actual sync with pref of the specified type. | 50 // This methods is used to do the actual sync with pref of the specified type. |
51 virtual void UpdateValueFromPref() = 0; | 51 virtual void UpdateValueFromPref() = 0; |
52 | 52 |
53 const std::wstring& pref_name() const { return pref_name_; } | 53 const std::wstring& pref_name() const { return pref_name_; } |
54 PrefService* prefs() { return prefs_; } | 54 PrefService* prefs() { return prefs_; } |
55 | 55 |
| 56 // Ordered the members to compact the class instance. |
| 57 private: |
| 58 std::wstring pref_name_; |
| 59 NotificationObserver* observer_; |
| 60 PrefService* prefs_; |
| 61 |
56 protected: | 62 protected: |
57 bool is_synced_; | 63 bool is_synced_; |
58 bool setting_value_; | 64 bool setting_value_; |
59 | |
60 private: | |
61 std::wstring pref_name_; | |
62 PrefService* prefs_; | |
63 NotificationObserver* observer_; | |
64 }; | 65 }; |
65 | 66 |
66 } // namespace subtle | 67 } // namespace subtle |
67 | 68 |
68 | 69 |
69 template <typename ValueType> | 70 template <typename ValueType> |
70 class PrefMember : public subtle::PrefMemberBase { | 71 class PrefMember : public subtle::PrefMemberBase { |
71 public: | 72 public: |
72 // Defer initialization to an Init method so it's easy to make this class be | 73 // Defer initialization to an Init method so it's easy to make this class be |
73 // a member variable. | 74 // a member variable. |
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113 // We cache the value of the pref so we don't have to keep walking the pref | 114 // We cache the value of the pref so we don't have to keep walking the pref |
114 // tree. | 115 // tree. |
115 ValueType value_; | 116 ValueType value_; |
116 }; | 117 }; |
117 | 118 |
118 /////////////////////////////////////////////////////////////////////////////// | 119 /////////////////////////////////////////////////////////////////////////////// |
119 // Implementations of Boolean, Integer, Real, and String PrefMember below. | 120 // Implementations of Boolean, Integer, Real, and String PrefMember below. |
120 | 121 |
121 class BooleanPrefMember : public PrefMember<bool> { | 122 class BooleanPrefMember : public PrefMember<bool> { |
122 public: | 123 public: |
123 BooleanPrefMember() : PrefMember() { } | 124 BooleanPrefMember() : PrefMember<bool>() { } |
124 virtual ~BooleanPrefMember() { } | 125 virtual ~BooleanPrefMember() { } |
125 | 126 |
126 protected: | 127 protected: |
127 virtual void UpdateValueFromPref(); | 128 virtual void UpdateValueFromPref(); |
128 virtual void UpdatePref(const bool& value); | 129 virtual void UpdatePref(const bool& value); |
129 | 130 |
130 private: | 131 private: |
131 DISALLOW_COPY_AND_ASSIGN(BooleanPrefMember); | 132 DISALLOW_COPY_AND_ASSIGN(BooleanPrefMember); |
132 }; | 133 }; |
133 | 134 |
134 class IntegerPrefMember : public PrefMember<int> { | 135 class IntegerPrefMember : public PrefMember<int> { |
135 public: | 136 public: |
136 IntegerPrefMember() : PrefMember() { } | 137 IntegerPrefMember() : PrefMember<int>() { } |
137 virtual ~IntegerPrefMember() { } | 138 virtual ~IntegerPrefMember() { } |
138 | 139 |
139 protected: | 140 protected: |
140 virtual void UpdateValueFromPref(); | 141 virtual void UpdateValueFromPref(); |
141 virtual void UpdatePref(const int& value); | 142 virtual void UpdatePref(const int& value); |
142 | 143 |
143 private: | 144 private: |
144 DISALLOW_COPY_AND_ASSIGN(IntegerPrefMember); | 145 DISALLOW_COPY_AND_ASSIGN(IntegerPrefMember); |
145 }; | 146 }; |
146 | 147 |
147 class RealPrefMember : public PrefMember<double> { | 148 class RealPrefMember : public PrefMember<double> { |
148 public: | 149 public: |
149 RealPrefMember() : PrefMember() { } | 150 RealPrefMember() : PrefMember<double>() { } |
150 virtual ~RealPrefMember() { } | 151 virtual ~RealPrefMember() { } |
151 | 152 |
152 protected: | 153 protected: |
153 virtual void UpdateValueFromPref(); | 154 virtual void UpdateValueFromPref(); |
154 virtual void UpdatePref(const double& value); | 155 virtual void UpdatePref(const double& value); |
155 | 156 |
156 private: | 157 private: |
157 DISALLOW_COPY_AND_ASSIGN(RealPrefMember); | 158 DISALLOW_COPY_AND_ASSIGN(RealPrefMember); |
158 }; | 159 }; |
159 | 160 |
160 class StringPrefMember : public PrefMember<std::wstring> { | 161 class StringPrefMember : public PrefMember<std::wstring> { |
161 public: | 162 public: |
162 StringPrefMember() : PrefMember() { } | 163 StringPrefMember() : PrefMember<std::wstring>() { } |
163 virtual ~StringPrefMember() { } | 164 virtual ~StringPrefMember() { } |
164 | 165 |
165 protected: | 166 protected: |
166 virtual void UpdateValueFromPref(); | 167 virtual void UpdateValueFromPref(); |
167 virtual void UpdatePref(const std::wstring& value); | 168 virtual void UpdatePref(const std::wstring& value); |
168 | 169 |
169 private: | 170 private: |
170 DISALLOW_COPY_AND_ASSIGN(StringPrefMember); | 171 DISALLOW_COPY_AND_ASSIGN(StringPrefMember); |
171 }; | 172 }; |
172 | 173 |
173 #endif // CHROME_COMMON_PREF_MEMBER_H_ | 174 #endif // CHROME_COMMON_PREF_MEMBER_H_ |
174 | 175 |
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