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// 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 "components/prefs/pref_value_map.h"
#include <map>
#include <memory>
#include <utility>
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/values.h"
PrefValueMap::PrefValueMap() {}
PrefValueMap::~PrefValueMap() {}
bool PrefValueMap::GetValue(const std::string& key,
const base::Value** value) const {
auto it = prefs_.find(key);
if (it == prefs_.end())
return false;
const base::Value* got_value = it->second.get();
if (value && got_value)
*value = got_value;
return !!got_value;
}
bool PrefValueMap::GetValue(const std::string& key, base::Value** value) {
auto it = prefs_.find(key);
if (it == prefs_.end())
return false;
base::Value* got_value = it->second.get();
if (value && got_value)
*value = got_value;
return !!got_value;
}
bool PrefValueMap::SetValue(const std::string& key,
std::unique_ptr<base::Value> value) {
DCHECK(value);
std::unique_ptr<base::Value>& existing_value = prefs_[key];
if (existing_value && value->Equals(existing_value.get()))
return false;
existing_value = 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::empty() const {
return prefs_.empty();
}
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, base::MakeUnique<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, base::MakeUnique<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, base::MakeUnique<base::FundamentalValue>(value));
}
void PrefValueMap::SetDouble(const std::string& key, const double value) {
SetValue(key, base::MakeUnique<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;
std::map<std::string, base::Value*> other_prefs;
for (const auto& pair : prefs_)
this_prefs[pair.first] = pair.second.get();
for (const auto& pair : other->prefs_)
other_prefs[pair.first] = pair.second.get();
// 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);
}
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