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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 
PrefRegistry()12 PrefRegistry::PrefRegistry()
13     : defaults_(new DefaultPrefStore()) {
14 }
15 
~PrefRegistry()16 PrefRegistry::~PrefRegistry() {
17 }
18 
defaults()19 scoped_refptr<PrefStore> PrefRegistry::defaults() {
20   return defaults_.get();
21 }
22 
begin() const23 PrefRegistry::const_iterator PrefRegistry::begin() const {
24   return defaults_->begin();
25 }
26 
end() const27 PrefRegistry::const_iterator PrefRegistry::end() const {
28   return defaults_->end();
29 }
30 
SetDefaultPrefValue(const char * pref_name,base::Value * value)31 void PrefRegistry::SetDefaultPrefValue(const char* pref_name,
32                                        base::Value* value) {
33   DCHECK(value);
34   const base::Value* current_value = NULL;
35   DCHECK(defaults_->GetValue(pref_name, &current_value))
36       << "Setting default for unregistered pref: " << pref_name;
37   DCHECK(value->IsType(current_value->GetType()))
38       << "Wrong type for new default: " << pref_name;
39 
40   defaults_->ReplaceDefaultValue(pref_name, make_scoped_ptr(value));
41 }
42 
RegisterPreference(const char * path,base::Value * default_value)43 void PrefRegistry::RegisterPreference(const char* path,
44                                       base::Value* default_value) {
45   base::Value::Type orig_type = default_value->GetType();
46   DCHECK(orig_type != base::Value::TYPE_NULL &&
47          orig_type != base::Value::TYPE_BINARY) <<
48          "invalid preference type: " << orig_type;
49   DCHECK(!defaults_->GetValue(path, NULL)) <<
50       "Trying to register a previously registered pref: " << path;
51 
52   defaults_->SetDefaultValue(path, make_scoped_ptr(default_value));
53 }
54