Move base/prefs to components/prefs

base/prefs/pref_value_map.cc

-// Copyright (c) 2011 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 "base/prefs/pref_value_map.h"
-
-#include <map>
-#include <utility>
-
-#include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/stl_util.h"
-#include "base/values.h"
-
-PrefValueMap::PrefValueMap() {}
-
-PrefValueMap::~PrefValueMap() {}
-
-bool PrefValueMap::GetValue(const std::string& key,
-                            const base::Value** value) const {
-  const base::Value* got_value = prefs_.get(key);
-  if (value && got_value)
-    *value = got_value;
-
-  return !!got_value;
-}
-
-bool PrefValueMap::GetValue(const std::string& key, base::Value** value) {
-  base::Value* got_value = prefs_.get(key);
-  if (value && got_value)
-    *value = got_value;
-
-  return !!got_value;
-}
-
-bool PrefValueMap::SetValue(const std::string& key,
-                            scoped_ptr<base::Value> value) {
-  DCHECK(value);
-
-  base::Value* old_value = prefs_.get(key);
-  if (old_value && value->Equals(old_value))
-    return false;
-
-  prefs_.set(key, std::move(value));
-  return true;
-}
-
-bool PrefValueMap::RemoveValue(const std::string& key) {
-  return prefs_.erase(key) != 0;
-}
-
-void PrefValueMap::Clear() {
-  prefs_.clear();
-}
-
-void PrefValueMap::Swap(PrefValueMap* other) {
-  prefs_.swap(other->prefs_);
-}
-
-PrefValueMap::iterator PrefValueMap::begin() {
-  return prefs_.begin();
-}
-
-PrefValueMap::iterator PrefValueMap::end() {
-  return prefs_.end();
-}
-
-PrefValueMap::const_iterator PrefValueMap::begin() const {
-  return prefs_.begin();
-}
-
-PrefValueMap::const_iterator PrefValueMap::end() const {
-  return prefs_.end();
-}
-
-bool PrefValueMap::GetBoolean(const std::string& key,
-                              bool* value) const {
-  const base::Value* stored_value = nullptr;
-  return GetValue(key, &stored_value) && stored_value->GetAsBoolean(value);
-}
-
-void PrefValueMap::SetBoolean(const std::string& key, bool value) {
-  SetValue(key, make_scoped_ptr(new base::FundamentalValue(value)));
-}
-
-bool PrefValueMap::GetString(const std::string& key,
-                             std::string* value) const {
-  const base::Value* stored_value = nullptr;
-  return GetValue(key, &stored_value) && stored_value->GetAsString(value);
-}
-
-void PrefValueMap::SetString(const std::string& key,
-                             const std::string& value) {
-  SetValue(key, make_scoped_ptr(new base::StringValue(value)));
-}
-
-bool PrefValueMap::GetInteger(const std::string& key, int* value) const {
-  const base::Value* stored_value = nullptr;
-  return GetValue(key, &stored_value) && stored_value->GetAsInteger(value);
-}
-
-void PrefValueMap::SetInteger(const std::string& key, const int value) {
-  SetValue(key, make_scoped_ptr(new base::FundamentalValue(value)));
-}
-
-void PrefValueMap::SetDouble(const std::string& key, const double value) {
-  SetValue(key, make_scoped_ptr(new base::FundamentalValue(value)));
-}
-
-void PrefValueMap::GetDifferingKeys(
-    const PrefValueMap* other,
-    std::vector<std::string>* differing_keys) const {
-  differing_keys->clear();
-
-  // Put everything into ordered maps.
-  std::map<std::string, base::Value*> this_prefs(prefs_.begin(), prefs_.end());
-  std::map<std::string, base::Value*> other_prefs(other->prefs_.begin(),
-                                                  other->prefs_.end());
-
-  // Walk over the maps in lockstep, adding everything that is different.
-  auto this_pref(this_prefs.begin());
-  auto other_pref(other_prefs.begin());
-  while (this_pref != this_prefs.end() && other_pref != other_prefs.end()) {
-    const int diff = this_pref->first.compare(other_pref->first);
-    if (diff == 0) {
-      if (!this_pref->second->Equals(other_pref->second))
-        differing_keys->push_back(this_pref->first);
-      ++this_pref;
-      ++other_pref;
-    } else if (diff < 0) {
-      differing_keys->push_back(this_pref->first);
-      ++this_pref;
-    } else if (diff > 0) {
-      differing_keys->push_back(other_pref->first);
-      ++other_pref;
-    }
-  }
-
-  // Add the remaining entries.
-  for ( ; this_pref != this_prefs.end(); ++this_pref)
-      differing_keys->push_back(this_pref->first);
-  for ( ; other_pref != other_prefs.end(); ++other_pref)
-      differing_keys->push_back(other_pref->first);
-}