chrome/browser/prefs/tracked/tracked_atomic_preference.cc

   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 #include "chrome/browser/prefs/tracked/tracked_atomic_preference.h"
   6
   7 #include "base/values.h"
   8 #include "chrome/browser/prefs/tracked/pref_hash_store_transaction.h"
   9 #include "chrome/browser/prefs/tracked/tracked_preference_validation_delegate.h"
  10
  11 TrackedAtomicPreference::TrackedAtomicPreference(
  12     const std::string& pref_path,
  13     size_t reporting_id,
  14     size_t reporting_ids_count,
  15     PrefHashFilter::EnforcementLevel enforcement_level,
  16     PrefHashFilter::ValueType value_type,
  17     TrackedPreferenceValidationDelegate* delegate)
  18     : pref_path_(pref_path),
  19       helper_(pref_path, reporting_id, reporting_ids_count, enforcement_level,
  20               value_type),
  21       delegate_(delegate) {
  22 }
  23
  24 void TrackedAtomicPreference::OnNewValue(
  25     const base::Value* value,
  26     PrefHashStoreTransaction* transaction) const {
  27   transaction->StoreHash(pref_path_, value);
  28 }
  29
  30 bool TrackedAtomicPreference::EnforceAndReport(
  31     base::DictionaryValue* pref_store_contents,
  32     PrefHashStoreTransaction* transaction) const {
  33   const base::Value* value = NULL;
  34   pref_store_contents->Get(pref_path_, &value);
  35   PrefHashStoreTransaction::ValueState value_state =
  36       transaction->CheckValue(pref_path_, value);
  37
  38   helper_.ReportValidationResult(value_state);
  39
  40   TrackedPreferenceHelper::ResetAction reset_action =
  41       helper_.GetAction(value_state);
  42   if (delegate_) {
  43     delegate_->OnAtomicPreferenceValidation(
  44         pref_path_, value, value_state, helper_.IsPersonal());
  45   }
  46   helper_.ReportAction(reset_action);
  47
  48   bool was_reset = false;
  49   if (reset_action == TrackedPreferenceHelper::DO_RESET) {
  50     pref_store_contents->RemovePath(pref_path_, NULL);
  51     was_reset = true;
  52   }
  53
  54   if (value_state != PrefHashStoreTransaction::UNCHANGED) {
  55     // Store the hash for the new value (whether it was reset or not).
  56     const base::Value* new_value = NULL;
  57     pref_store_contents->Get(pref_path_, &new_value);
  58     transaction->StoreHash(pref_path_, new_value);
  59   }
  60
  61   return was_reset;
  62 }