1// Copyright (c) 2012 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 "base/prefs/pref_registry.h"
6
7#include "base/logging.h"
8#include "base/prefs/default_pref_store.h"
9#include "base/prefs/pref_store.h"
10#include "base/values.h"
11
12PrefRegistry::PrefRegistry()
13    : defaults_(new DefaultPrefStore()) {
14}
15
16PrefRegistry::~PrefRegistry() {
17}
18
19scoped_refptr<PrefStore> PrefRegistry::defaults() {
20  return defaults_.get();
21}
22
23PrefRegistry::const_iterator PrefRegistry::begin() const {
24  return defaults_->begin();
25}
26
27PrefRegistry::const_iterator PrefRegistry::end() const {
28  return defaults_->end();
29}
30
31void PrefRegistry::SetDefaultPrefValue(const char* pref_name,
32                                       base::Value* value) {
33  DCHECK(value);
34  if (DCHECK_IS_ON()) {
35    const base::Value* current_value = NULL;
36    DCHECK(defaults_->GetValue(pref_name, &current_value))
37        << "Setting default for unregistered pref: " << pref_name;
38    DCHECK(value->IsType(current_value->GetType()))
39        << "Wrong type for new default: " << pref_name;
40  }
41
42  defaults_->ReplaceDefaultValue(pref_name, make_scoped_ptr(value));
43}
44
45void PrefRegistry::RegisterPreference(const char* path,
46                                      base::Value* default_value) {
47  base::Value::Type orig_type = default_value->GetType();
48  DCHECK(orig_type != base::Value::TYPE_NULL &&
49         orig_type != base::Value::TYPE_BINARY) <<
50         "invalid preference type: " << orig_type;
51  DCHECK(!defaults_->GetValue(path, NULL)) <<
52      "Trying to register a previously registered pref: " << path;
53
54  defaults_->SetDefaultValue(path, make_scoped_ptr(default_value));
55}
56