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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* user_prefs,
PrefStore* recommended_prefs)
: managed_prefs_(managed_prefs),
user_prefs_(user_prefs),
recommended_prefs_(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.
if (managed_prefs_.get() &&
managed_prefs_->prefs()->Get(name.c_str(), out_value) ) {
return true;
} else if (user_prefs_.get() &&
user_prefs_->prefs()->Get(name.c_str(), out_value) ) {
return true;
} else if (recommended_prefs_.get() &&
recommended_prefs_->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() {
// Managed and recommended preferences are not set by the user.
// Hence they will not be written out.
return user_prefs_->WritePrefs();
}
void PrefValueStore::ScheduleWritePrefs() {
// Managed and recommended preferences are not set by the user.
// Hence they will not be written out.
user_prefs_->ScheduleWritePrefs();
}
PrefStore::PrefReadError PrefValueStore::ReadPrefs() {
PrefStore::PrefReadError managed_pref_error = PrefStore::PREF_READ_ERROR_NONE;
PrefStore::PrefReadError user_pref_error = PrefStore::PREF_READ_ERROR_NONE;
PrefStore::PrefReadError recommended_pref_error =
PrefStore::PREF_READ_ERROR_NONE;
// Read managed preferences.
if (managed_prefs_.get()) {
managed_pref_error = managed_prefs_->ReadPrefs();
}
// Read preferences set by the user.
if (user_prefs_.get()) {
user_pref_error = user_prefs_->ReadPrefs();
}
// Read recommended preferences.
if (recommended_prefs_.get()) {
recommended_pref_error = recommended_prefs_->ReadPrefs();
}
// TODO(markusheintz): Return a better error status maybe a struct with
// the error status of all PrefStores.
// Return the first pref store error that occured.
if (managed_pref_error != PrefStore::PREF_READ_ERROR_NONE) {
return managed_pref_error;
}
if (user_pref_error != PrefStore::PREF_READ_ERROR_NONE) {
return user_pref_error;
}
return recommended_pref_error;
}
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;
}
// The value of a Preference is managed if the PrefStore for managed
// preferences contains a value for the given preference |name|.
bool PrefValueStore::PrefValueIsManaged(const wchar_t* name) {
if (managed_prefs_.get() == NULL) {
// No managed PreferenceStore set, hence there are no managed
// preferences.
return false;
}
Value* tmp_value;
return managed_prefs_->prefs()->Get(name, &tmp_value);
}
// 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) {
user_prefs_->prefs()->Set(name, in_value);
}
bool PrefValueStore::ReadOnly() {
return user_prefs_->ReadOnly();
}
void PrefValueStore::RemoveUserPrefValue(const wchar_t* name) {
if (user_prefs_.get()) {
user_prefs_->prefs()->Remove(name, NULL);
}
}
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