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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 "chrome/browser/prefs/pref_service.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 | |
| 9 #include "base/bind.h" | |
| 10 #include "base/file_path.h" | |
| 11 #include "base/logging.h" | |
| 12 #include "base/message_loop.h" | |
| 13 #include "base/metrics/histogram.h" | |
| 14 #include "base/prefs/default_pref_store.h" | |
| 15 #include "base/stl_util.h" | |
| 16 #include "base/string_number_conversions.h" | |
| 17 #include "base/string_util.h" | |
| 18 #include "base/value_conversions.h" | |
| 19 #include "build/build_config.h" | |
| 20 #include "chrome/browser/prefs/pref_notifier_impl.h" | |
| 21 #include "chrome/browser/prefs/pref_registry.h" | |
| 22 #include "chrome/browser/prefs/pref_value_store.h" | |
| 23 | |
| 24 using content::BrowserContext; | |
| 25 | |
| 26 namespace { | |
| 27 | |
| 28 class ReadErrorHandler : public PersistentPrefStore::ReadErrorDelegate { | |
| 29 public: | |
| 30 ReadErrorHandler(base::Callback<void(PersistentPrefStore::PrefReadError)> cb) | |
| 31 : callback_(cb) {} | |
| 32 | |
| 33 virtual void OnError(PersistentPrefStore::PrefReadError error) OVERRIDE { | |
| 34 callback_.Run(error); | |
| 35 } | |
| 36 | |
| 37 private: | |
| 38 base::Callback<void(PersistentPrefStore::PrefReadError)> callback_; | |
| 39 }; | |
| 40 | |
| 41 } // namespace | |
| 42 | |
| 43 PrefService::PrefService( | |
| 44 PrefNotifierImpl* pref_notifier, | |
| 45 PrefValueStore* pref_value_store, | |
| 46 PersistentPrefStore* user_prefs, | |
| 47 PrefRegistry* pref_registry, | |
| 48 base::Callback<void(PersistentPrefStore::PrefReadError)> | |
| 49 read_error_callback, | |
| 50 bool async) | |
| 51 : pref_notifier_(pref_notifier), | |
| 52 pref_value_store_(pref_value_store), | |
| 53 pref_registry_(pref_registry), | |
| 54 user_pref_store_(user_prefs), | |
| 55 read_error_callback_(read_error_callback) { | |
| 56 pref_notifier_->SetPrefService(this); | |
| 57 | |
| 58 pref_registry_->SetRegistrationCallback( | |
| 59 base::Bind(&PrefService::AddRegisteredPreference, | |
| 60 base::Unretained(this))); | |
| 61 pref_registry_->SetUnregistrationCallback( | |
| 62 base::Bind(&PrefService::RemoveRegisteredPreference, | |
| 63 base::Unretained(this))); | |
| 64 AddInitialPreferences(); | |
| 65 | |
| 66 InitFromStorage(async); | |
| 67 } | |
| 68 | |
| 69 PrefService::~PrefService() { | |
| 70 DCHECK(CalledOnValidThread()); | |
| 71 | |
| 72 // Remove our callbacks, setting NULL ones. | |
| 73 pref_registry_->SetRegistrationCallback(PrefRegistry::RegistrationCallback()); | |
| 74 pref_registry_->SetUnregistrationCallback( | |
| 75 PrefRegistry::UnregistrationCallback()); | |
| 76 | |
| 77 // Reset pointers so accesses after destruction reliably crash. | |
| 78 pref_value_store_.reset(); | |
| 79 pref_registry_ = NULL; | |
| 80 user_pref_store_ = NULL; | |
| 81 pref_notifier_.reset(); | |
| 82 } | |
| 83 | |
| 84 void PrefService::InitFromStorage(bool async) { | |
| 85 if (!async) { | |
| 86 read_error_callback_.Run(user_pref_store_->ReadPrefs()); | |
| 87 } else { | |
| 88 // Guarantee that initialization happens after this function returned. | |
| 89 MessageLoop::current()->PostTask( | |
| 90 FROM_HERE, | |
| 91 base::Bind(&PersistentPrefStore::ReadPrefsAsync, | |
| 92 user_pref_store_.get(), | |
| 93 new ReadErrorHandler(read_error_callback_))); | |
| 94 } | |
| 95 } | |
| 96 | |
| 97 bool PrefService::ReloadPersistentPrefs() { | |
| 98 return user_pref_store_->ReadPrefs() == | |
| 99 PersistentPrefStore::PREF_READ_ERROR_NONE; | |
| 100 } | |
| 101 | |
| 102 void PrefService::CommitPendingWrite() { | |
| 103 DCHECK(CalledOnValidThread()); | |
| 104 user_pref_store_->CommitPendingWrite(); | |
| 105 } | |
| 106 | |
| 107 bool PrefService::GetBoolean(const char* path) const { | |
| 108 DCHECK(CalledOnValidThread()); | |
| 109 | |
| 110 bool result = false; | |
| 111 | |
| 112 const base::Value* value = GetPreferenceValue(path); | |
| 113 if (!value) { | |
| 114 NOTREACHED() << "Trying to read an unregistered pref: " << path; | |
| 115 return result; | |
| 116 } | |
| 117 bool rv = value->GetAsBoolean(&result); | |
| 118 DCHECK(rv); | |
| 119 return result; | |
| 120 } | |
| 121 | |
| 122 int PrefService::GetInteger(const char* path) const { | |
| 123 DCHECK(CalledOnValidThread()); | |
| 124 | |
| 125 int result = 0; | |
| 126 | |
| 127 const base::Value* value = GetPreferenceValue(path); | |
| 128 if (!value) { | |
| 129 NOTREACHED() << "Trying to read an unregistered pref: " << path; | |
| 130 return result; | |
| 131 } | |
| 132 bool rv = value->GetAsInteger(&result); | |
| 133 DCHECK(rv); | |
| 134 return result; | |
| 135 } | |
| 136 | |
| 137 double PrefService::GetDouble(const char* path) const { | |
| 138 DCHECK(CalledOnValidThread()); | |
| 139 | |
| 140 double result = 0.0; | |
| 141 | |
| 142 const base::Value* value = GetPreferenceValue(path); | |
| 143 if (!value) { | |
| 144 NOTREACHED() << "Trying to read an unregistered pref: " << path; | |
| 145 return result; | |
| 146 } | |
| 147 bool rv = value->GetAsDouble(&result); | |
| 148 DCHECK(rv); | |
| 149 return result; | |
| 150 } | |
| 151 | |
| 152 std::string PrefService::GetString(const char* path) const { | |
| 153 DCHECK(CalledOnValidThread()); | |
| 154 | |
| 155 std::string result; | |
| 156 | |
| 157 const base::Value* value = GetPreferenceValue(path); | |
| 158 if (!value) { | |
| 159 NOTREACHED() << "Trying to read an unregistered pref: " << path; | |
| 160 return result; | |
| 161 } | |
| 162 bool rv = value->GetAsString(&result); | |
| 163 DCHECK(rv); | |
| 164 return result; | |
| 165 } | |
| 166 | |
| 167 FilePath PrefService::GetFilePath(const char* path) const { | |
| 168 DCHECK(CalledOnValidThread()); | |
| 169 | |
| 170 FilePath result; | |
| 171 | |
| 172 const base::Value* value = GetPreferenceValue(path); | |
| 173 if (!value) { | |
| 174 NOTREACHED() << "Trying to read an unregistered pref: " << path; | |
| 175 return FilePath(result); | |
| 176 } | |
| 177 bool rv = base::GetValueAsFilePath(*value, &result); | |
| 178 DCHECK(rv); | |
| 179 return result; | |
| 180 } | |
| 181 | |
| 182 bool PrefService::HasPrefPath(const char* path) const { | |
| 183 const Preference* pref = FindPreference(path); | |
| 184 return pref && !pref->IsDefaultValue(); | |
| 185 } | |
| 186 | |
| 187 DictionaryValue* PrefService::GetPreferenceValues() const { | |
| 188 DCHECK(CalledOnValidThread()); | |
| 189 DictionaryValue* out = new DictionaryValue; | |
| 190 PrefRegistry::const_iterator i = pref_registry_->begin(); | |
| 191 for (; i != pref_registry_->end(); ++i) { | |
| 192 const Value* value = GetPreferenceValue(i->first); | |
| 193 DCHECK(value); | |
| 194 out->Set(i->first, value->DeepCopy()); | |
| 195 } | |
| 196 return out; | |
| 197 } | |
| 198 | |
| 199 const PrefService::Preference* PrefService::FindPreference( | |
| 200 const char* pref_name) const { | |
| 201 DCHECK(CalledOnValidThread()); | |
| 202 PreferenceMap::iterator it = prefs_map_.find(pref_name); | |
| 203 if (it != prefs_map_.end()) | |
| 204 return &(it->second); | |
| 205 const base::Value* default_value = NULL; | |
| 206 if (!pref_registry_->defaults()->GetValue(pref_name, &default_value)) | |
| 207 return NULL; | |
| 208 it = prefs_map_.insert( | |
| 209 std::make_pair(pref_name, Preference( | |
| 210 this, pref_name, default_value->GetType()))).first; | |
| 211 return &(it->second); | |
| 212 } | |
| 213 | |
| 214 bool PrefService::ReadOnly() const { | |
| 215 return user_pref_store_->ReadOnly(); | |
| 216 } | |
| 217 | |
| 218 PrefService::PrefInitializationStatus PrefService::GetInitializationStatus() | |
| 219 const { | |
| 220 if (!user_pref_store_->IsInitializationComplete()) | |
| 221 return INITIALIZATION_STATUS_WAITING; | |
| 222 | |
| 223 switch (user_pref_store_->GetReadError()) { | |
| 224 case PersistentPrefStore::PREF_READ_ERROR_NONE: | |
| 225 return INITIALIZATION_STATUS_SUCCESS; | |
| 226 case PersistentPrefStore::PREF_READ_ERROR_NO_FILE: | |
| 227 return INITIALIZATION_STATUS_CREATED_NEW_PROFILE; | |
| 228 default: | |
| 229 return INITIALIZATION_STATUS_ERROR; | |
| 230 } | |
| 231 } | |
| 232 | |
| 233 bool PrefService::IsManagedPreference(const char* pref_name) const { | |
| 234 const Preference* pref = FindPreference(pref_name); | |
| 235 return pref && pref->IsManaged(); | |
| 236 } | |
| 237 | |
| 238 bool PrefService::IsUserModifiablePreference(const char* pref_name) const { | |
| 239 const Preference* pref = FindPreference(pref_name); | |
| 240 return pref && pref->IsUserModifiable(); | |
| 241 } | |
| 242 | |
| 243 const DictionaryValue* PrefService::GetDictionary(const char* path) const { | |
| 244 DCHECK(CalledOnValidThread()); | |
| 245 | |
| 246 const Value* value = GetPreferenceValue(path); | |
| 247 if (!value) { | |
| 248 NOTREACHED() << "Trying to read an unregistered pref: " << path; | |
| 249 return NULL; | |
| 250 } | |
| 251 if (value->GetType() != Value::TYPE_DICTIONARY) { | |
| 252 NOTREACHED(); | |
| 253 return NULL; | |
| 254 } | |
| 255 return static_cast<const DictionaryValue*>(value); | |
| 256 } | |
| 257 | |
| 258 const base::Value* PrefService::GetUserPrefValue(const char* path) const { | |
| 259 DCHECK(CalledOnValidThread()); | |
| 260 | |
| 261 const Preference* pref = FindPreference(path); | |
| 262 if (!pref) { | |
| 263 NOTREACHED() << "Trying to get an unregistered pref: " << path; | |
| 264 return NULL; | |
| 265 } | |
| 266 | |
| 267 // Look for an existing preference in the user store. If it doesn't | |
| 268 // exist, return NULL. | |
| 269 base::Value* value = NULL; | |
| 270 if (!user_pref_store_->GetMutableValue(path, &value)) | |
| 271 return NULL; | |
| 272 | |
| 273 if (!value->IsType(pref->GetType())) { | |
| 274 NOTREACHED() << "Pref value type doesn't match registered type."; | |
| 275 return NULL; | |
| 276 } | |
| 277 | |
| 278 return value; | |
| 279 } | |
| 280 | |
| 281 const base::Value* PrefService::GetDefaultPrefValue(const char* path) const { | |
| 282 DCHECK(CalledOnValidThread()); | |
| 283 // Lookup the preference in the default store. | |
| 284 const base::Value* value = NULL; | |
| 285 if (!pref_registry_->defaults()->GetValue(path, &value)) { | |
| 286 NOTREACHED() << "Default value missing for pref: " << path; | |
| 287 return NULL; | |
| 288 } | |
| 289 return value; | |
| 290 } | |
| 291 | |
| 292 const ListValue* PrefService::GetList(const char* path) const { | |
| 293 DCHECK(CalledOnValidThread()); | |
| 294 | |
| 295 const Value* value = GetPreferenceValue(path); | |
| 296 if (!value) { | |
| 297 NOTREACHED() << "Trying to read an unregistered pref: " << path; | |
| 298 return NULL; | |
| 299 } | |
| 300 if (value->GetType() != Value::TYPE_LIST) { | |
| 301 NOTREACHED(); | |
| 302 return NULL; | |
| 303 } | |
| 304 return static_cast<const ListValue*>(value); | |
| 305 } | |
| 306 | |
| 307 void PrefService::AddPrefObserver(const char* path, PrefObserver* obs) { | |
| 308 pref_notifier_->AddPrefObserver(path, obs); | |
| 309 } | |
| 310 | |
| 311 void PrefService::RemovePrefObserver(const char* path, PrefObserver* obs) { | |
| 312 pref_notifier_->RemovePrefObserver(path, obs); | |
| 313 } | |
| 314 | |
| 315 void PrefService::AddPrefInitObserver(base::Callback<void(bool)> obs) { | |
| 316 pref_notifier_->AddInitObserver(obs); | |
| 317 } | |
| 318 | |
| 319 PrefRegistry* PrefService::DeprecatedGetPrefRegistry() { | |
| 320 return pref_registry_.get(); | |
| 321 } | |
| 322 | |
| 323 void PrefService::AddInitialPreferences() { | |
| 324 for (PrefRegistry::const_iterator it = pref_registry_->begin(); | |
| 325 it != pref_registry_->end(); | |
| 326 ++it) { | |
| 327 AddRegisteredPreference(it->first.c_str(), it->second); | |
| 328 } | |
| 329 } | |
| 330 | |
| 331 // TODO(joi): Once MarkNeedsEmptyValue is gone, we can probably | |
| 332 // completely get rid of this method. There will be one difference in | |
| 333 // semantics; currently all registered preferences are stored right | |
| 334 // away in the prefs_map_, if we remove this they would be stored only | |
| 335 // opportunistically. | |
| 336 void PrefService::AddRegisteredPreference(const char* path, | |
| 337 Value* default_value) { | |
| 338 DCHECK(CalledOnValidThread()); | |
| 339 | |
| 340 // For ListValue and DictionaryValue with non empty default, empty value | |
| 341 // for |path| needs to be persisted in |user_pref_store_|. So that | |
| 342 // non empty default is not used when user sets an empty ListValue or | |
| 343 // DictionaryValue. | |
| 344 bool needs_empty_value = false; | |
| 345 base::Value::Type orig_type = default_value->GetType(); | |
| 346 if (orig_type == base::Value::TYPE_LIST) { | |
| 347 const base::ListValue* list = NULL; | |
| 348 if (default_value->GetAsList(&list) && !list->empty()) | |
| 349 needs_empty_value = true; | |
| 350 } else if (orig_type == base::Value::TYPE_DICTIONARY) { | |
| 351 const base::DictionaryValue* dict = NULL; | |
| 352 if (default_value->GetAsDictionary(&dict) && !dict->empty()) | |
| 353 needs_empty_value = true; | |
| 354 } | |
| 355 if (needs_empty_value) | |
| 356 user_pref_store_->MarkNeedsEmptyValue(path); | |
| 357 } | |
| 358 | |
| 359 // TODO(joi): We can get rid of this once the ability to unregister | |
| 360 // prefs has been removed. | |
| 361 void PrefService::RemoveRegisteredPreference(const char* path) { | |
| 362 DCHECK(CalledOnValidThread()); | |
| 363 | |
| 364 prefs_map_.erase(path); | |
| 365 } | |
| 366 | |
| 367 void PrefService::ClearPref(const char* path) { | |
| 368 DCHECK(CalledOnValidThread()); | |
| 369 | |
| 370 const Preference* pref = FindPreference(path); | |
| 371 if (!pref) { | |
| 372 NOTREACHED() << "Trying to clear an unregistered pref: " << path; | |
| 373 return; | |
| 374 } | |
| 375 user_pref_store_->RemoveValue(path); | |
| 376 } | |
| 377 | |
| 378 void PrefService::Set(const char* path, const Value& value) { | |
| 379 SetUserPrefValue(path, value.DeepCopy()); | |
| 380 } | |
| 381 | |
| 382 void PrefService::SetBoolean(const char* path, bool value) { | |
| 383 SetUserPrefValue(path, Value::CreateBooleanValue(value)); | |
| 384 } | |
| 385 | |
| 386 void PrefService::SetInteger(const char* path, int value) { | |
| 387 SetUserPrefValue(path, Value::CreateIntegerValue(value)); | |
| 388 } | |
| 389 | |
| 390 void PrefService::SetDouble(const char* path, double value) { | |
| 391 SetUserPrefValue(path, Value::CreateDoubleValue(value)); | |
| 392 } | |
| 393 | |
| 394 void PrefService::SetString(const char* path, const std::string& value) { | |
| 395 SetUserPrefValue(path, Value::CreateStringValue(value)); | |
| 396 } | |
| 397 | |
| 398 void PrefService::SetFilePath(const char* path, const FilePath& value) { | |
| 399 SetUserPrefValue(path, base::CreateFilePathValue(value)); | |
| 400 } | |
| 401 | |
| 402 void PrefService::SetInt64(const char* path, int64 value) { | |
| 403 SetUserPrefValue(path, Value::CreateStringValue(base::Int64ToString(value))); | |
| 404 } | |
| 405 | |
| 406 int64 PrefService::GetInt64(const char* path) const { | |
| 407 DCHECK(CalledOnValidThread()); | |
| 408 | |
| 409 const Value* value = GetPreferenceValue(path); | |
| 410 if (!value) { | |
| 411 NOTREACHED() << "Trying to read an unregistered pref: " << path; | |
| 412 return 0; | |
| 413 } | |
| 414 std::string result("0"); | |
| 415 bool rv = value->GetAsString(&result); | |
| 416 DCHECK(rv); | |
| 417 | |
| 418 int64 val; | |
| 419 base::StringToInt64(result, &val); | |
| 420 return val; | |
| 421 } | |
| 422 | |
| 423 void PrefService::SetUint64(const char* path, uint64 value) { | |
| 424 SetUserPrefValue(path, Value::CreateStringValue(base::Uint64ToString(value))); | |
| 425 } | |
| 426 | |
| 427 uint64 PrefService::GetUint64(const char* path) const { | |
| 428 DCHECK(CalledOnValidThread()); | |
| 429 | |
| 430 const Value* value = GetPreferenceValue(path); | |
| 431 if (!value) { | |
| 432 NOTREACHED() << "Trying to read an unregistered pref: " << path; | |
| 433 return 0; | |
| 434 } | |
| 435 std::string result("0"); | |
| 436 bool rv = value->GetAsString(&result); | |
| 437 DCHECK(rv); | |
| 438 | |
| 439 uint64 val; | |
| 440 base::StringToUint64(result, &val); | |
| 441 return val; | |
| 442 } | |
| 443 | |
| 444 Value* PrefService::GetMutableUserPref(const char* path, | |
| 445 base::Value::Type type) { | |
| 446 CHECK(type == Value::TYPE_DICTIONARY || type == Value::TYPE_LIST); | |
| 447 DCHECK(CalledOnValidThread()); | |
| 448 | |
| 449 const Preference* pref = FindPreference(path); | |
| 450 if (!pref) { | |
| 451 NOTREACHED() << "Trying to get an unregistered pref: " << path; | |
| 452 return NULL; | |
| 453 } | |
| 454 if (pref->GetType() != type) { | |
| 455 NOTREACHED() << "Wrong type for GetMutableValue: " << path; | |
| 456 return NULL; | |
| 457 } | |
| 458 | |
| 459 // Look for an existing preference in the user store. If it doesn't | |
| 460 // exist or isn't the correct type, create a new user preference. | |
| 461 Value* value = NULL; | |
| 462 if (!user_pref_store_->GetMutableValue(path, &value) || | |
| 463 !value->IsType(type)) { | |
| 464 if (type == Value::TYPE_DICTIONARY) { | |
| 465 value = new DictionaryValue; | |
| 466 } else if (type == Value::TYPE_LIST) { | |
| 467 value = new ListValue; | |
| 468 } else { | |
| 469 NOTREACHED(); | |
| 470 } | |
| 471 user_pref_store_->SetValueSilently(path, value); | |
| 472 } | |
| 473 return value; | |
| 474 } | |
| 475 | |
| 476 void PrefService::ReportUserPrefChanged(const std::string& key) { | |
| 477 user_pref_store_->ReportValueChanged(key); | |
| 478 } | |
| 479 | |
| 480 void PrefService::SetUserPrefValue(const char* path, Value* new_value) { | |
| 481 scoped_ptr<Value> owned_value(new_value); | |
| 482 DCHECK(CalledOnValidThread()); | |
| 483 | |
| 484 const Preference* pref = FindPreference(path); | |
| 485 if (!pref) { | |
| 486 NOTREACHED() << "Trying to write an unregistered pref: " << path; | |
| 487 return; | |
| 488 } | |
| 489 if (pref->GetType() != new_value->GetType()) { | |
| 490 NOTREACHED() << "Trying to set pref " << path | |
| 491 << " of type " << pref->GetType() | |
| 492 << " to value of type " << new_value->GetType(); | |
| 493 return; | |
| 494 } | |
| 495 | |
| 496 user_pref_store_->SetValue(path, owned_value.release()); | |
| 497 } | |
| 498 | |
| 499 void PrefService::UpdateCommandLinePrefStore(PrefStore* command_line_store) { | |
| 500 pref_value_store_->UpdateCommandLinePrefStore(command_line_store); | |
| 501 } | |
| 502 | |
| 503 /////////////////////////////////////////////////////////////////////////////// | |
| 504 // PrefService::Preference | |
| 505 | |
| 506 PrefService::Preference::Preference(const PrefService* service, | |
| 507 const char* name, | |
| 508 base::Value::Type type) | |
| 509 : name_(name), | |
| 510 type_(type), | |
| 511 pref_service_(service) { | |
| 512 DCHECK(name); | |
| 513 DCHECK(service); | |
| 514 } | |
| 515 | |
| 516 const std::string PrefService::Preference::name() const { | |
| 517 return name_; | |
| 518 } | |
| 519 | |
| 520 base::Value::Type PrefService::Preference::GetType() const { | |
| 521 return type_; | |
| 522 } | |
| 523 | |
| 524 const Value* PrefService::Preference::GetValue() const { | |
| 525 const Value* result= pref_service_->GetPreferenceValue(name_); | |
| 526 DCHECK(result) << "Must register pref before getting its value"; | |
| 527 return result; | |
| 528 } | |
| 529 | |
| 530 const Value* PrefService::Preference::GetRecommendedValue() const { | |
| 531 DCHECK(pref_service_->FindPreference(name_.c_str())) << | |
| 532 "Must register pref before getting its value"; | |
| 533 | |
| 534 const Value* found_value = NULL; | |
| 535 if (pref_value_store()->GetRecommendedValue(name_, type_, &found_value)) { | |
| 536 DCHECK(found_value->IsType(type_)); | |
| 537 return found_value; | |
| 538 } | |
| 539 | |
| 540 // The pref has no recommended value. | |
| 541 return NULL; | |
| 542 } | |
| 543 | |
| 544 bool PrefService::Preference::IsManaged() const { | |
| 545 return pref_value_store()->PrefValueInManagedStore(name_.c_str()); | |
| 546 } | |
| 547 | |
| 548 bool PrefService::Preference::IsRecommended() const { | |
| 549 return pref_value_store()->PrefValueFromRecommendedStore(name_.c_str()); | |
| 550 } | |
| 551 | |
| 552 bool PrefService::Preference::HasExtensionSetting() const { | |
| 553 return pref_value_store()->PrefValueInExtensionStore(name_.c_str()); | |
| 554 } | |
| 555 | |
| 556 bool PrefService::Preference::HasUserSetting() const { | |
| 557 return pref_value_store()->PrefValueInUserStore(name_.c_str()); | |
| 558 } | |
| 559 | |
| 560 bool PrefService::Preference::IsExtensionControlled() const { | |
| 561 return pref_value_store()->PrefValueFromExtensionStore(name_.c_str()); | |
| 562 } | |
| 563 | |
| 564 bool PrefService::Preference::IsUserControlled() const { | |
| 565 return pref_value_store()->PrefValueFromUserStore(name_.c_str()); | |
| 566 } | |
| 567 | |
| 568 bool PrefService::Preference::IsDefaultValue() const { | |
| 569 return pref_value_store()->PrefValueFromDefaultStore(name_.c_str()); | |
| 570 } | |
| 571 | |
| 572 bool PrefService::Preference::IsUserModifiable() const { | |
| 573 return pref_value_store()->PrefValueUserModifiable(name_.c_str()); | |
| 574 } | |
| 575 | |
| 576 bool PrefService::Preference::IsExtensionModifiable() const { | |
| 577 return pref_value_store()->PrefValueExtensionModifiable(name_.c_str()); | |
| 578 } | |
| 579 | |
| 580 const base::Value* PrefService::GetPreferenceValue( | |
| 581 const std::string& path) const { | |
| 582 DCHECK(CalledOnValidThread()); | |
| 583 const Value* default_value = NULL; | |
| 584 if (pref_registry_->defaults()->GetValue(path, &default_value)) { | |
| 585 const Value* found_value = NULL; | |
| 586 base::Value::Type default_type = default_value->GetType(); | |
| 587 if (pref_value_store_->GetValue(path, default_type, &found_value)) { | |
| 588 DCHECK(found_value->IsType(default_type)); | |
| 589 return found_value; | |
| 590 } else { | |
| 591 // Every registered preference has at least a default value. | |
| 592 NOTREACHED() << "no valid value found for registered pref " << path; | |
| 593 } | |
| 594 } | |
| 595 | |
| 596 return NULL; | |
| 597 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 12211105:
Move remaining non-test, non-Chrome-specific Prefs code to base/prefs/. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src