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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_USER_PREFS_TRACKED_ATOMIC_PREFERENCE_H_
#define COMPONENTS_USER_PREFS_TRACKED_ATOMIC_PREFERENCE_H_
#include <stddef.h>
#include <string>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "components/user_prefs/tracked/pref_hash_filter.h"
#include "components/user_prefs/tracked/tracked_preference.h"
#include "components/user_prefs/tracked/tracked_preference_helper.h"
class TrackedPreferenceValidationDelegate;
// A TrackedAtomicPreference is tracked as a whole. A hash is stored for its
// entire value and it is entirely reset on mismatch. An optional delegate is
// notified of the status of the preference during enforcement.
class TrackedAtomicPreference : public TrackedPreference {
public:
TrackedAtomicPreference(const std::string& pref_path,
size_t reporting_id,
size_t reporting_ids_count,
PrefHashFilter::EnforcementLevel enforcement_level,
PrefHashFilter::ValueType value_type,
TrackedPreferenceValidationDelegate* delegate);
// TrackedPreference implementation.
TrackedPreferenceType GetType() const override;
void OnNewValue(const base::Value* value,
PrefHashStoreTransaction* transaction) const override;
bool EnforceAndReport(
base::DictionaryValue* pref_store_contents,
PrefHashStoreTransaction* transaction,
PrefHashStoreTransaction* external_validation_transaction) const override;
private:
const std::string pref_path_;
const TrackedPreferenceHelper helper_;
TrackedPreferenceValidationDelegate* delegate_;
DISALLOW_COPY_AND_ASSIGN(TrackedAtomicPreference);
};
#endif // COMPONENTS_USER_PREFS_TRACKED_ATOMIC_PREFERENCE_H_
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