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// Copyright 2013 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 "components/syncable_prefs/synced_pref_change_registrar.h"
#include "base/bind.h"
namespace {
void InvokeUnnamedCallback(
const SyncedPrefChangeRegistrar::ChangeCallback& callback,
const std::string& path,
bool from_sync) {
callback.Run(from_sync);
}
} // namespace
SyncedPrefChangeRegistrar::SyncedPrefChangeRegistrar(
PrefServiceSyncable* pref_service) {
pref_service_ = pref_service;
}
SyncedPrefChangeRegistrar::~SyncedPrefChangeRegistrar() {
RemoveAll();
}
void SyncedPrefChangeRegistrar::Add(const char *path,
const ChangeCallback& callback) {
Add(path, base::Bind(InvokeUnnamedCallback, callback));
}
void SyncedPrefChangeRegistrar::Add(const char *path,
const NamedChangeCallback& callback) {
DCHECK(!IsObserved(path));
observers_[path] = callback;
pref_service_->AddSyncedPrefObserver(path, this);
}
void SyncedPrefChangeRegistrar::Remove(const char *path) {
observers_.erase(path);
pref_service_->RemoveSyncedPrefObserver(path, this);
}
void SyncedPrefChangeRegistrar::RemoveAll() {
for (ObserverMap::iterator iter = observers_.begin();
iter != observers_.end(); ++iter) {
pref_service_->RemoveSyncedPrefObserver(iter->first, this);
}
observers_.clear();
}
bool SyncedPrefChangeRegistrar::IsObserved(const char* path) const {
return observers_.find(path) != observers_.end();
}
void SyncedPrefChangeRegistrar::OnSyncedPrefChanged(const std::string& path,
bool from_sync) {
if (pref_service_->IsManagedPreference(path.c_str()))
return;
ObserverMap::const_iterator iter = observers_.find(path);
if (iter == observers_.end())
return;
iter->second.Run(path, from_sync);
}
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