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// Copyright (c) 2010 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 "chrome/browser/pref_value_store.h"
PrefValueStore::PrefValueStore(PrefStore* managed_prefs,
PrefStore* extension_prefs,
PrefStore* command_line_prefs,
PrefStore* user_prefs,
PrefStore* recommended_prefs) {
pref_stores_[MANAGED].reset(managed_prefs);
pref_stores_[EXTENSION].reset(extension_prefs);
pref_stores_[COMMAND_LINE].reset(command_line_prefs);
pref_stores_[USER].reset(user_prefs);
pref_stores_[RECOMMENDED].reset(recommended_prefs);
}
PrefValueStore::~PrefValueStore() { }
bool PrefValueStore::GetValue(const std::wstring& name,
Value** out_value) const {
// Check the |PrefStore|s in order of their priority from highest to lowest
// to find the value of the preference described by the given preference name.
for (size_t i = 0; i <= PREF_STORE_TYPE_MAX; ++i) {
if (pref_stores_[i].get() &&
pref_stores_[i]->prefs()->Get(name.c_str(), out_value)) {
return true;
}
}
// No value found for the given preference name, set the return false.
*out_value = NULL;
return false;
}
bool PrefValueStore::WritePrefs() {
bool success = true;
for (size_t i = 0; i <= PREF_STORE_TYPE_MAX; ++i) {
if (pref_stores_[i].get())
success = pref_stores_[i]->WritePrefs() && success;
}
return success;
}
void PrefValueStore::ScheduleWritePrefs() {
for (size_t i = 0; i <= PREF_STORE_TYPE_MAX; ++i) {
if (pref_stores_[i].get())
pref_stores_[i]->ScheduleWritePrefs();
}
}
PrefStore::PrefReadError PrefValueStore::ReadPrefs() {
PrefStore::PrefReadError result = PrefStore::PREF_READ_ERROR_NONE;
for (size_t i = 0; i <= PREF_STORE_TYPE_MAX; ++i) {
if (pref_stores_[i].get()) {
PrefStore::PrefReadError this_error = pref_stores_[i]->ReadPrefs();
if (result == PrefStore::PREF_READ_ERROR_NONE)
result = this_error;
}
}
// TODO(markusheintz): Return a better error status: maybe a struct with
// the error status of all PrefStores.
return result;
}
bool PrefValueStore::HasPrefPath(const wchar_t* path) const {
Value* tmp_value = NULL;
const std::wstring name(path);
bool rv = GetValue(name, &tmp_value);
return rv;
}
// Note the |DictionaryValue| referenced by the |PrefStore| user_prefs_
// (returned by the method prefs()) takes the ownership of the Value referenced
// by in_value.
void PrefValueStore::SetUserPrefValue(const wchar_t* name, Value* in_value) {
pref_stores_[USER]->prefs()->Set(name, in_value);
}
bool PrefValueStore::ReadOnly() {
return pref_stores_[USER]->ReadOnly();
}
void PrefValueStore::RemoveUserPrefValue(const wchar_t* name) {
if (pref_stores_[USER].get()) {
pref_stores_[USER]->prefs()->Remove(name, NULL);
}
}
bool PrefValueStore::PrefValueInManagedStore(const wchar_t* name) {
return PrefValueInStore(name, MANAGED);
}
bool PrefValueStore::PrefValueInExtensionStore(const wchar_t* name) {
return PrefValueInStore(name, EXTENSION);
}
bool PrefValueStore::PrefValueInUserStore(const wchar_t* name) {
return PrefValueInStore(name, USER);
}
bool PrefValueStore::PrefValueFromExtensionStore(const wchar_t* name) {
return ControllingPrefStoreForPref(name) == EXTENSION;
}
bool PrefValueStore::PrefValueFromUserStore(const wchar_t* name) {
return ControllingPrefStoreForPref(name) == USER;
}
bool PrefValueStore::PrefValueUserModifiable(const wchar_t* name) {
PrefStoreType effective_store = ControllingPrefStoreForPref(name);
return effective_store >= USER || effective_store == INVALID;
}
bool PrefValueStore::PrefValueInStore(const wchar_t* name, PrefStoreType type) {
if (pref_stores_[type].get() == NULL) {
// No store of that type set, so this pref can't be in it.
return false;
}
Value* tmp_value;
return pref_stores_[type]->prefs()->Get(name, &tmp_value);
}
PrefValueStore::PrefStoreType PrefValueStore::ControllingPrefStoreForPref(
const wchar_t* name) {
for (int i = 0; i <= PREF_STORE_TYPE_MAX; ++i) {
if (PrefValueInStore(name, static_cast<PrefStoreType>(i)))
return static_cast<PrefStoreType>(i);
}
return INVALID;
}
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