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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 THIRD_PARTY_LIBADDRESSINPUT_CHROMIUM_CHROME_STORAGE_IMPL_H_
      6 #define THIRD_PARTY_LIBADDRESSINPUT_CHROMIUM_CHROME_STORAGE_IMPL_H_
      7 
      8 #include <list>
      9 #include <string>
     10 
     11 #include "base/memory/scoped_vector.h"
     12 #include "base/prefs/pref_store.h"
     13 #include "base/scoped_observer.h"
     14 #include "third_party/libaddressinput/chromium/cpp/include/libaddressinput/storage.h"
     15 #include "third_party/libaddressinput/chromium/cpp/include/libaddressinput/util/scoped_ptr.h"
     16 
     17 class WriteablePrefStore;
     18 
     19 namespace autofill {
     20 
     21 // An implementation of the Storage interface which passes through to an
     22 // underlying WriteablePrefStore.
     23 class ChromeStorageImpl : public ::i18n::addressinput::Storage,
     24                           public PrefStore::Observer {
     25  public:
     26   // |store| must outlive |this|.
     27   explicit ChromeStorageImpl(WriteablePrefStore* store);
     28   virtual ~ChromeStorageImpl();
     29 
     30   // ::i18n::addressinput::Storage implementation.
     31   virtual void Put(const std::string& key, scoped_ptr<std::string> data)
     32       OVERRIDE;
     33   virtual void Get(const std::string& key, scoped_ptr<Callback> data_ready)
     34       const OVERRIDE;
     35 
     36   // PrefStore::Observer implementation.
     37   virtual void OnPrefValueChanged(const std::string& key) OVERRIDE;
     38   virtual void OnInitializationCompleted(bool succeeded) OVERRIDE;
     39 
     40  private:
     41   struct Request {
     42     Request(const std::string& key, scoped_ptr<Callback> callback);
     43 
     44     std::string key;
     45     scoped_ptr<Callback> callback;
     46   };
     47 
     48   // Non-const version of Get().
     49   void DoGet(const std::string& key, scoped_ptr<Callback> data_ready);
     50 
     51   WriteablePrefStore* backing_store_;  // weak
     52 
     53   // Get requests that haven't yet been serviced.
     54   ScopedVector<Request> outstanding_requests_;
     55 
     56   ScopedObserver<PrefStore, ChromeStorageImpl> scoped_observer_;
     57 
     58   DISALLOW_COPY_AND_ASSIGN(ChromeStorageImpl);
     59 };
     60 
     61 }  // namespace autofill
     62 
     63 #endif  // THIRD_PARTY_LIBADDRESSINPUT_CHROMIUM_CHROME_STORAGE_IMPL_H_
     64