| OLD | NEW | 
 | (Empty) | 
|   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_EXTENSIONS_SETTINGS_SETTINGS_STORAGE_QUOTA_ENFORCER_H_ |  | 
|   6 #define CHROME_BROWSER_EXTENSIONS_SETTINGS_SETTINGS_STORAGE_QUOTA_ENFORCER_H_ |  | 
|   7  |  | 
|   8 #include "base/compiler_specific.h" |  | 
|   9 #include "base/memory/weak_ptr.h" |  | 
|  10 #include "chrome/browser/value_store/value_store.h" |  | 
|  11  |  | 
|  12 namespace extensions { |  | 
|  13  |  | 
|  14 // Enforces total quota and a per-setting quota in bytes, and a maximum number |  | 
|  15 // of setting keys, for a delegate storage area. |  | 
|  16 class SettingsStorageQuotaEnforcer : public ValueStore { |  | 
|  17  public: |  | 
|  18   struct Limits { |  | 
|  19     // The total quota in bytes. |  | 
|  20     size_t quota_bytes; |  | 
|  21  |  | 
|  22     // The quota for each individual item in bytes. |  | 
|  23     size_t quota_bytes_per_item; |  | 
|  24  |  | 
|  25     // The maximum number of items allowed. |  | 
|  26     size_t max_items; |  | 
|  27   }; |  | 
|  28  |  | 
|  29   SettingsStorageQuotaEnforcer(const Limits& limits, ValueStore* delegate); |  | 
|  30  |  | 
|  31   virtual ~SettingsStorageQuotaEnforcer(); |  | 
|  32  |  | 
|  33   // ValueStore implementation. |  | 
|  34   virtual size_t GetBytesInUse(const std::string& key) OVERRIDE; |  | 
|  35   virtual size_t GetBytesInUse(const std::vector<std::string>& keys) OVERRIDE; |  | 
|  36   virtual size_t GetBytesInUse() OVERRIDE; |  | 
|  37   virtual ReadResult Get(const std::string& key) OVERRIDE; |  | 
|  38   virtual ReadResult Get(const std::vector<std::string>& keys) OVERRIDE; |  | 
|  39   virtual ReadResult Get() OVERRIDE; |  | 
|  40   virtual WriteResult Set( |  | 
|  41       WriteOptions options, |  | 
|  42       const std::string& key, |  | 
|  43       const Value& value) OVERRIDE; |  | 
|  44   virtual WriteResult Set( |  | 
|  45       WriteOptions options, const DictionaryValue& values) OVERRIDE; |  | 
|  46   virtual WriteResult Remove(const std::string& key) OVERRIDE; |  | 
|  47   virtual WriteResult Remove(const std::vector<std::string>& keys) OVERRIDE; |  | 
|  48   virtual WriteResult Clear() OVERRIDE; |  | 
|  49  |  | 
|  50  private: |  | 
|  51   // Limits configuration. |  | 
|  52   const Limits limits_; |  | 
|  53  |  | 
|  54   // The delegate storage area. |  | 
|  55   scoped_ptr<ValueStore> const delegate_; |  | 
|  56  |  | 
|  57   // Total bytes in used by |delegate_|. Includes both key lengths and |  | 
|  58   // JSON-encoded values. |  | 
|  59   size_t used_total_; |  | 
|  60  |  | 
|  61   // Map of item key to its size, including the key itself. |  | 
|  62   std::map<std::string, size_t> used_per_setting_; |  | 
|  63  |  | 
|  64   DISALLOW_COPY_AND_ASSIGN(SettingsStorageQuotaEnforcer); |  | 
|  65 }; |  | 
|  66  |  | 
|  67 }  // namespace extensions |  | 
|  68  |  | 
|  69 #endif  // CHROME_BROWSER_EXTENSIONS_SETTINGS_SETTINGS_STORAGE_QUOTA_ENFORCER_H_ |  | 
| OLD | NEW |