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| 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_COMMON_PERSISTENT_PREF_STORE_H_ | 5 #ifndef CHROME_COMMON_PERSISTENT_PREF_STORE_H_ |
| 6 #define CHROME_COMMON_PERSISTENT_PREF_STORE_H_ | 6 #define CHROME_COMMON_PERSISTENT_PREF_STORE_H_ |
| 7 #pragma once | 7 #pragma once |
| 8 | 8 |
| 9 #include <string> | 9 #include <string> |
| 10 | 10 |
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| 36 | 36 |
| 37 class ReadErrorDelegate { | 37 class ReadErrorDelegate { |
| 38 public: | 38 public: |
| 39 virtual ~ReadErrorDelegate() {} | 39 virtual ~ReadErrorDelegate() {} |
| 40 | 40 |
| 41 virtual void OnError(PrefReadError error) = 0; | 41 virtual void OnError(PrefReadError error) = 0; |
| 42 }; | 42 }; |
| 43 | 43 |
| 44 // Equivalent to PrefStore::GetValue but returns a mutable value. | 44 // Equivalent to PrefStore::GetValue but returns a mutable value. |
| 45 virtual ReadResult GetMutableValue(const std::string& key, | 45 virtual ReadResult GetMutableValue(const std::string& key, |
| 46 Value** result) = 0; | 46 base::Value** result) = 0; |
| 47 | 47 |
| 48 // Triggers a value changed notification. This function needs to be called | 48 // Triggers a value changed notification. This function needs to be called |
| 49 // if one retrieves a list or dictionary with GetMutableValue and change its | 49 // if one retrieves a list or dictionary with GetMutableValue and change its |
| 50 // value. SetValue takes care of notifications itself. Note that | 50 // value. SetValue takes care of notifications itself. Note that |
| 51 // ReportValueChanged will trigger notifications even if nothing has changed. | 51 // ReportValueChanged will trigger notifications even if nothing has changed. |
| 52 virtual void ReportValueChanged(const std::string& key) = 0; | 52 virtual void ReportValueChanged(const std::string& key) = 0; |
| 53 | 53 |
| 54 // Sets a |value| for |key| in the store. Assumes ownership of |value|, which | 54 // Sets a |value| for |key| in the store. Assumes ownership of |value|, which |
| 55 // must be non-NULL. | 55 // must be non-NULL. |
| 56 virtual void SetValue(const std::string& key, Value* value) = 0; | 56 virtual void SetValue(const std::string& key, base::Value* value) = 0; |
| 57 | 57 |
| 58 // Same as SetValue, but doesn't generate notifications. This is used by | 58 // Same as SetValue, but doesn't generate notifications. This is used by |
| 59 // PrefService::GetMutableUserPref() in order to put empty entries | 59 // PrefService::GetMutableUserPref() in order to put empty entries |
| 60 // into the user pref store. Using SetValue is not an option since existing | 60 // into the user pref store. Using SetValue is not an option since existing |
| 61 // tests rely on the number of notifications generated. | 61 // tests rely on the number of notifications generated. |
| 62 virtual void SetValueSilently(const std::string& key, Value* value) = 0; | 62 virtual void SetValueSilently(const std::string& key, base::Value* value) = 0; |
| 63 | 63 |
| 64 // Removes the value for |key|. | 64 // Removes the value for |key|. |
| 65 virtual void RemoveValue(const std::string& key) = 0; | 65 virtual void RemoveValue(const std::string& key) = 0; |
| 66 | 66 |
| 67 // Whether the store is in a pseudo-read-only mode where changes are not | 67 // Whether the store is in a pseudo-read-only mode where changes are not |
| 68 // actually persisted to disk. This happens in some cases when there are | 68 // actually persisted to disk. This happens in some cases when there are |
| 69 // read errors during startup. | 69 // read errors during startup. |
| 70 virtual bool ReadOnly() const = 0; | 70 virtual bool ReadOnly() const = 0; |
| 71 | 71 |
| 72 // Reads the preferences from disk. Notifies observers via | 72 // Reads the preferences from disk. Notifies observers via |
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| 83 virtual bool WritePrefs() = 0; | 83 virtual bool WritePrefs() = 0; |
| 84 | 84 |
| 85 // Schedules an asynchronous write operation. | 85 // Schedules an asynchronous write operation. |
| 86 virtual void ScheduleWritePrefs() = 0; | 86 virtual void ScheduleWritePrefs() = 0; |
| 87 | 87 |
| 88 // Lands any pending writes to disk. | 88 // Lands any pending writes to disk. |
| 89 virtual void CommitPendingWrite() = 0; | 89 virtual void CommitPendingWrite() = 0; |
| 90 }; | 90 }; |
| 91 | 91 |
| 92 #endif // CHROME_COMMON_PERSISTENT_PREF_STORE_H_ | 92 #endif // CHROME_COMMON_PERSISTENT_PREF_STORE_H_ |
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