chrome/browser/browsing_data/browsing_data_counter.cc

   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 #include "chrome/browser/browsing_data/browsing_data_counter.h"
   6
   7 #include "base/prefs/pref_service.h"
   8 #include "chrome/browser/profiles/profile.h"
   9
  10 BrowsingDataCounter::BrowsingDataCounter()
  11     : counting_(false),
  12       initialized_(false) {
  13 }
  14
  15 BrowsingDataCounter::~BrowsingDataCounter() {
  16 }
  17
  18 void BrowsingDataCounter::Init(
  19     Profile* profile,
  20     const Callback& callback) {
  21   DCHECK(!initialized_);
  22   profile_ = profile;
  23   callback_ = callback;
  24   pref_.Init(
  25       GetPrefName(),
  26       profile_->GetPrefs(),
  27       base::Bind(&BrowsingDataCounter::OnPrefChanged,
  28                  base::Unretained(this)));
  29
  30   initialized_ = true;
  31   OnPrefChanged();
  32 }
  33
  34 void BrowsingDataCounter::OnPrefChanged() {
  35   DCHECK(initialized_);
  36
  37   // If this data type was unchecked for deletion, we do not need to count it.
  38   if (!profile_->GetPrefs()->GetBoolean(GetPrefName()))
  39     return;
  40
  41   // If counting is already in progress, do not restart it.
  42   if (counting_)
  43     return;
  44
  45   callback_.Run(false, 0u);
  46
  47   counting_ = true;
  48   Count();
  49 }
  50
  51 // virtual
  52 void BrowsingDataCounter::Count() {
  53 }
  54
  55 void BrowsingDataCounter::ReportResult(uint32 value) {
  56   DCHECK(initialized_);
  57   DCHECK(counting_);
  58   counting_ = false;
  59   callback_.Run(true, value);
  60 }