chrome/browser/browsing_data/browsing_data_counter.h

   1 // Copyright (c) 2015 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_BROWSING_DATA_BROWSING_DATA_COUNTER_H_
   6 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_COUNTER_H_
   7
   8 #include <string>
   9
  10 #include "base/callback.h"
  11 #include "base/prefs/pref_member.h"
  12 #include "chrome/browser/profiles/profile.h"
  13
  14 class BrowsingDataCounter {
  15  public:
  16   typedef base::Callback<void(bool, uint32)> Callback;
  17
  18   BrowsingDataCounter();
  19   virtual ~BrowsingDataCounter();
  20
  21   // Should be called once to initialize this class.
  22   void Init(Profile* profile,
  23             const Callback& callback);
  24
  25   // Name of the preference associated with this counter.
  26   virtual const std::string& GetPrefName() const = 0;
  27
  28  protected:
  29   // Should be called from |Count| by any overriding class to indicate that
  30   // counting is finished and report the |result|.
  31   void ReportResult(uint32 result);
  32
  33  private:
  34   // Called when the boolean preference indicating whether this data type
  35   // is to be deleted changes.
  36   void OnPrefChanged();
  37
  38   // Count the data.
  39   virtual void Count();
  40
  41   // The profile for which we will count the data volume.
  42   Profile* profile_;
  43
  44   // The callback that will be called when the UI should be updated with a new
  45   // counter value.
  46   Callback callback_;
  47
  48   // The boolean preference indicating whether this data type is to be deleted.
  49   // If false, we will not count it.
  50   BooleanPrefMember pref_;
  51
  52   // Whether this counter is currently in the process of counting.
  53   bool counting_;
  54
  55   // Whether this class was properly initialized by calling |Init|.
  56   bool initialized_;
  57 };
  58
  59 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_COUNTER_H_