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      1 // Copyright 2014 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 EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_
      6 #define EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_
      7 
      8 #include "base/compiler_specific.h"
      9 #include "extensions/browser/value_store/value_store.h"
     10 
     11 namespace extensions {
     12 
     13 // A ValueStore decorator which makes calls through |Set| ignore quota.
     14 // "Weak" because ownership of the delegate isn't taken; this is designed to be
     15 // temporarily attached to storage areas.
     16 class WeakUnlimitedSettingsStorage : public ValueStore {
     17  public:
     18   // Ownership of |delegate| NOT taken.
     19   explicit WeakUnlimitedSettingsStorage(ValueStore* delegate);
     20 
     21   virtual ~WeakUnlimitedSettingsStorage();
     22 
     23   // ValueStore implementation.
     24   virtual size_t GetBytesInUse(const std::string& key) OVERRIDE;
     25   virtual size_t GetBytesInUse(const std::vector<std::string>& keys) OVERRIDE;
     26   virtual size_t GetBytesInUse() OVERRIDE;
     27   virtual ReadResult Get(const std::string& key) OVERRIDE;
     28   virtual ReadResult Get(const std::vector<std::string>& keys) OVERRIDE;
     29   virtual ReadResult Get() OVERRIDE;
     30   virtual WriteResult Set(
     31       WriteOptions options,
     32       const std::string& key,
     33       const base::Value& value) OVERRIDE;
     34   virtual WriteResult Set(
     35       WriteOptions options, const base::DictionaryValue& values) OVERRIDE;
     36   virtual WriteResult Remove(const std::string& key) OVERRIDE;
     37   virtual WriteResult Remove(const std::vector<std::string>& keys) OVERRIDE;
     38   virtual WriteResult Clear() OVERRIDE;
     39   virtual bool Restore() OVERRIDE;
     40   virtual bool RestoreKey(const std::string& key) OVERRIDE;
     41 
     42  private:
     43   // The delegate storage area, NOT OWNED.
     44   ValueStore* const delegate_;
     45 
     46   DISALLOW_COPY_AND_ASSIGN(WeakUnlimitedSettingsStorage);
     47 };
     48 
     49 }  // namespace extensions
     50 
     51 #endif  // EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_
     52