components/test_runner/tracked_dictionary.cc

// Copyright 2016 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.

#include "components/test_runner/tracked_dictionary.h"

#include <utility>

#include "base/memory/ptr_util.h"

namespace test_runner {

TrackedDictionary::TrackedDictionary() {}

void TrackedDictionary::ResetChangeTracking() {
  changed_values_.Clear();
}

void TrackedDictionary::ApplyUntrackedChanges(
    const base::DictionaryValue& new_changes) {
  current_values_.MergeDictionary(&new_changes);

  for (base::DictionaryValue::Iterator it(new_changes); !it.IsAtEnd();
       it.Advance()) {
    changed_values_.Remove(it.key(), nullptr);
  }
}

void TrackedDictionary::Set(const std::string& path,
                            std::unique_ptr<base::Value> new_value) {
  // Is this truly a *new* value?
  const base::Value* old_value;
  if (current_values_.Get(path, &old_value)) {
    if (base::Value::Equals(old_value, new_value.get()))
      return;
  }

  changed_values_.Set(path, new_value->CreateDeepCopy());
  current_values_.Set(path, std::move(new_value));
}

void TrackedDictionary::SetBoolean(const std::string& path, bool new_value) {
  Set(path, base::MakeUnique<base::FundamentalValue>(new_value));
}

void TrackedDictionary::SetString(const std::string& path,
                                  const std::string& new_value) {
  Set(path, base::MakeUnique<base::StringValue>(new_value));
}

}  // namespace test_runner