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_VALUE_STORE_VALUE_STORE_CHANGE_H_ 6 #define EXTENSIONS_BROWSER_VALUE_STORE_VALUE_STORE_CHANGE_H_ 7 8 #include <string> 9 #include <vector> 10 11 #include "base/memory/ref_counted.h" 12 #include "base/memory/scoped_ptr.h" 13 #include "base/values.h" 14 15 class ValueStoreChange; 16 typedef std::vector<ValueStoreChange> ValueStoreChangeList; 17 18 // A change to a setting. Safe/efficient to copy. 19 class ValueStoreChange { 20 public: 21 // Converts an ValueStoreChangeList into JSON of the form: 22 // { "foo": { "key": "foo", "oldValue": "bar", "newValue": "baz" } } 23 static std::string ToJson(const ValueStoreChangeList& changes); 24 25 // Ownership of |old_value| and |new_value| taken. 26 ValueStoreChange( 27 const std::string& key, base::Value* old_value, base::Value* new_value); 28 29 ~ValueStoreChange(); 30 31 // Gets the key of the setting which changed. 32 const std::string& key() const; 33 34 // Gets the value of the setting before the change, or NULL if there was no 35 // old value. 36 const base::Value* old_value() const; 37 38 // Gets the value of the setting after the change, or NULL if there is no new 39 // value. 40 const base::Value* new_value() const; 41 42 private: 43 class Inner : public base::RefCountedThreadSafe<Inner> { 44 public: 45 Inner( 46 const std::string& key, base::Value* old_value, base::Value* new_value); 47 48 const std::string key_; 49 const scoped_ptr<base::Value> old_value_; 50 const scoped_ptr<base::Value> new_value_; 51 52 private: 53 friend class base::RefCountedThreadSafe<Inner>; 54 virtual ~Inner(); 55 }; 56 57 scoped_refptr<Inner> inner_; 58 }; 59 60 #endif // EXTENSIONS_BROWSER_VALUE_STORE_VALUE_STORE_CHANGE_H_ 61
