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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_member.h" | |
| 6 | |
| 7 #include <utility> | |
| 8 | |
| 9 #include "base/callback.h" | |
| 10 #include "base/callback_helpers.h" | |
| 11 #include "base/location.h" | |
| 12 #include "base/prefs/pref_service.h" | |
| 13 #include "base/thread_task_runner_handle.h" | |
| 14 #include "base/value_conversions.h" | |
| 15 | |
| 16 using base::SingleThreadTaskRunner; | |
| 17 | |
| 18 namespace subtle { | |
| 19 | |
| 20 PrefMemberBase::PrefMemberBase() | |
| 21 : prefs_(NULL), | |
| 22 setting_value_(false) { | |
| 23 } | |
| 24 | |
| 25 PrefMemberBase::~PrefMemberBase() { | |
| 26 Destroy(); | |
| 27 } | |
| 28 | |
| 29 void PrefMemberBase::Init(const std::string& pref_name, | |
| 30 PrefService* prefs, | |
| 31 const NamedChangeCallback& observer) { | |
| 32 observer_ = observer; | |
| 33 Init(pref_name, prefs); | |
| 34 } | |
| 35 | |
| 36 void PrefMemberBase::Init(const std::string& pref_name, PrefService* prefs) { | |
| 37 DCHECK(prefs); | |
| 38 DCHECK(pref_name_.empty()); // Check that Init is only called once. | |
| 39 prefs_ = prefs; | |
| 40 pref_name_ = pref_name; | |
| 41 // Check that the preference is registered. | |
| 42 DCHECK(prefs_->FindPreference(pref_name_)) << pref_name << " not registered."; | |
| 43 | |
| 44 // Add ourselves as a pref observer so we can keep our local value in sync. | |
| 45 prefs_->AddPrefObserver(pref_name, this); | |
| 46 } | |
| 47 | |
| 48 void PrefMemberBase::Destroy() { | |
| 49 if (prefs_ && !pref_name_.empty()) { | |
| 50 prefs_->RemovePrefObserver(pref_name_, this); | |
| 51 prefs_ = NULL; | |
| 52 } | |
| 53 } | |
| 54 | |
| 55 void PrefMemberBase::MoveToThread( | |
| 56 scoped_refptr<SingleThreadTaskRunner> task_runner) { | |
| 57 VerifyValuePrefName(); | |
| 58 // Load the value from preferences if it hasn't been loaded so far. | |
| 59 if (!internal()) | |
| 60 UpdateValueFromPref(base::Closure()); | |
| 61 internal()->MoveToThread(std::move(task_runner)); | |
| 62 } | |
| 63 | |
| 64 void PrefMemberBase::OnPreferenceChanged(PrefService* service, | |
| 65 const std::string& pref_name) { | |
| 66 VerifyValuePrefName(); | |
| 67 UpdateValueFromPref((!setting_value_ && !observer_.is_null()) ? | |
| 68 base::Bind(observer_, pref_name) : base::Closure()); | |
| 69 } | |
| 70 | |
| 71 void PrefMemberBase::UpdateValueFromPref(const base::Closure& callback) const { | |
| 72 VerifyValuePrefName(); | |
| 73 const PrefService::Preference* pref = prefs_->FindPreference(pref_name_); | |
| 74 DCHECK(pref); | |
| 75 if (!internal()) | |
| 76 CreateInternal(); | |
| 77 internal()->UpdateValue(pref->GetValue()->DeepCopy(), | |
| 78 pref->IsManaged(), | |
| 79 pref->IsUserModifiable(), | |
| 80 callback); | |
| 81 } | |
| 82 | |
| 83 void PrefMemberBase::VerifyPref() const { | |
| 84 VerifyValuePrefName(); | |
| 85 if (!internal()) | |
| 86 UpdateValueFromPref(base::Closure()); | |
| 87 } | |
| 88 | |
| 89 void PrefMemberBase::InvokeUnnamedCallback(const base::Closure& callback, | |
| 90 const std::string& pref_name) { | |
| 91 callback.Run(); | |
| 92 } | |
| 93 | |
| 94 PrefMemberBase::Internal::Internal() | |
| 95 : thread_task_runner_(base::ThreadTaskRunnerHandle::Get()), | |
| 96 is_managed_(false), | |
| 97 is_user_modifiable_(false) { | |
| 98 } | |
| 99 PrefMemberBase::Internal::~Internal() { } | |
| 100 | |
| 101 bool PrefMemberBase::Internal::IsOnCorrectThread() const { | |
| 102 return thread_task_runner_->BelongsToCurrentThread(); | |
| 103 } | |
| 104 | |
| 105 void PrefMemberBase::Internal::UpdateValue( | |
| 106 base::Value* v, | |
| 107 bool is_managed, | |
| 108 bool is_user_modifiable, | |
| 109 const base::Closure& callback) const { | |
| 110 scoped_ptr<base::Value> value(v); | |
| 111 base::ScopedClosureRunner closure_runner(callback); | |
| 112 if (IsOnCorrectThread()) { | |
| 113 bool rv = UpdateValueInternal(*value); | |
| 114 DCHECK(rv); | |
| 115 is_managed_ = is_managed; | |
| 116 is_user_modifiable_ = is_user_modifiable; | |
| 117 } else { | |
| 118 bool may_run = thread_task_runner_->PostTask( | |
| 119 FROM_HERE, base::Bind(&PrefMemberBase::Internal::UpdateValue, this, | |
| 120 value.release(), is_managed, is_user_modifiable, | |
| 121 closure_runner.Release())); | |
| 122 DCHECK(may_run); | |
| 123 } | |
| 124 } | |
| 125 | |
| 126 void PrefMemberBase::Internal::MoveToThread( | |
| 127 scoped_refptr<SingleThreadTaskRunner> task_runner) { | |
| 128 CheckOnCorrectThread(); | |
| 129 thread_task_runner_ = std::move(task_runner); | |
| 130 } | |
| 131 | |
| 132 bool PrefMemberVectorStringUpdate(const base::Value& value, | |
| 133 std::vector<std::string>* string_vector) { | |
| 134 if (!value.IsType(base::Value::TYPE_LIST)) | |
| 135 return false; | |
| 136 const base::ListValue* list = static_cast<const base::ListValue*>(&value); | |
| 137 | |
| 138 std::vector<std::string> local_vector; | |
| 139 for (base::ListValue::const_iterator it = list->begin(); | |
| 140 it != list->end(); ++it) { | |
| 141 std::string string_value; | |
| 142 if (!(*it)->GetAsString(&string_value)) | |
| 143 return false; | |
| 144 | |
| 145 local_vector.push_back(string_value); | |
| 146 } | |
| 147 | |
| 148 string_vector->swap(local_vector); | |
| 149 return true; | |
| 150 } | |
| 151 | |
| 152 } // namespace subtle | |
| 153 | |
| 154 template <> | |
| 155 void PrefMember<bool>::UpdatePref(const bool& value) { | |
| 156 prefs()->SetBoolean(pref_name(), value); | |
| 157 } | |
| 158 | |
| 159 template <> | |
| 160 bool PrefMember<bool>::Internal::UpdateValueInternal( | |
| 161 const base::Value& value) const { | |
| 162 return value.GetAsBoolean(&value_); | |
| 163 } | |
| 164 | |
| 165 template <> | |
| 166 void PrefMember<int>::UpdatePref(const int& value) { | |
| 167 prefs()->SetInteger(pref_name(), value); | |
| 168 } | |
| 169 | |
| 170 template <> | |
| 171 bool PrefMember<int>::Internal::UpdateValueInternal( | |
| 172 const base::Value& value) const { | |
| 173 return value.GetAsInteger(&value_); | |
| 174 } | |
| 175 | |
| 176 template <> | |
| 177 void PrefMember<double>::UpdatePref(const double& value) { | |
| 178 prefs()->SetDouble(pref_name(), value); | |
| 179 } | |
| 180 | |
| 181 template <> | |
| 182 bool PrefMember<double>::Internal::UpdateValueInternal(const base::Value& value) | |
| 183 const { | |
| 184 return value.GetAsDouble(&value_); | |
| 185 } | |
| 186 | |
| 187 template <> | |
| 188 void PrefMember<std::string>::UpdatePref(const std::string& value) { | |
| 189 prefs()->SetString(pref_name(), value); | |
| 190 } | |
| 191 | |
| 192 template <> | |
| 193 bool PrefMember<std::string>::Internal::UpdateValueInternal( | |
| 194 const base::Value& value) | |
| 195 const { | |
| 196 return value.GetAsString(&value_); | |
| 197 } | |
| 198 | |
| 199 template <> | |
| 200 void PrefMember<base::FilePath>::UpdatePref(const base::FilePath& value) { | |
| 201 prefs()->SetFilePath(pref_name(), value); | |
| 202 } | |
| 203 | |
| 204 template <> | |
| 205 bool PrefMember<base::FilePath>::Internal::UpdateValueInternal( | |
| 206 const base::Value& value) | |
| 207 const { | |
| 208 return base::GetValueAsFilePath(value, &value_); | |
| 209 } | |
| 210 | |
| 211 template <> | |
| 212 void PrefMember<std::vector<std::string> >::UpdatePref( | |
| 213 const std::vector<std::string>& value) { | |
| 214 base::ListValue list_value; | |
| 215 list_value.AppendStrings(value); | |
| 216 prefs()->Set(pref_name(), list_value); | |
| 217 } | |
| 218 | |
| 219 template <> | |
| 220 bool PrefMember<std::vector<std::string> >::Internal::UpdateValueInternal( | |
| 221 const base::Value& value) const { | |
| 222 return subtle::PrefMemberVectorStringUpdate(value, &value_); | |
| 223 } | |
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Chromium Code Reviews
Issue 1653693002:
Move base/prefs to components/prefs (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master