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 "components/policy/core/common/policy_service.h" 6 7 #include "base/values.h" 8 9 namespace policy { 10 11 PolicyChangeRegistrar::PolicyChangeRegistrar(PolicyService* policy_service, 12 const PolicyNamespace& ns) 13 : policy_service_(policy_service), 14 ns_(ns) {} 15 16 PolicyChangeRegistrar::~PolicyChangeRegistrar() { 17 if (!callback_map_.empty()) 18 policy_service_->RemoveObserver(ns_.domain, this); 19 } 20 21 void PolicyChangeRegistrar::Observe(const std::string& policy_name, 22 const UpdateCallback& callback) { 23 if (callback_map_.empty()) 24 policy_service_->AddObserver(ns_.domain, this); 25 callback_map_[policy_name] = callback; 26 } 27 28 void PolicyChangeRegistrar::OnPolicyUpdated(const PolicyNamespace& ns, 29 const PolicyMap& previous, 30 const PolicyMap& current) { 31 if (ns != ns_) 32 return; 33 for (CallbackMap::iterator it = callback_map_.begin(); 34 it != callback_map_.end(); ++it) { 35 const base::Value* prev = previous.GetValue(it->first); 36 const base::Value* cur = current.GetValue(it->first); 37 if (!base::Value::Equals(prev, cur)) 38 it->second.Run(prev, cur); 39 } 40 } 41 42 } // namespace policy 43
