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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/extensions/api/processes/processes_api_service.h" |
| 6 |
| 7 #include "chrome/browser/extensions/event_router.h" |
| 8 #include "chrome/browser/extensions/extension_system.h" |
| 9 #include "chrome/browser/extensions/api/processes/processes_api.h" |
| 10 #include "chrome/browser/extensions/api/processes/processes_api_constants.h" |
| 11 #include "chrome/browser/extensions/api/processes/processes_api_service_factory.
h" |
| 12 #include "chrome/browser/profiles/profile.h" |
| 13 |
| 14 namespace extensions { |
| 15 |
| 16 ProcessesAPIService::ProcessesAPIService(Profile* profile) : profile_(profile) { |
| 17 DCHECK(ExtensionSystem::Get(profile_)->event_router()); |
| 18 ExtensionSystem::Get(profile_)->event_router()->RegisterObserver( |
| 19 this, processes_api_constants::kOnUpdated); |
| 20 ExtensionSystem::Get(profile_)->event_router()->RegisterObserver( |
| 21 this, processes_api_constants::kOnUpdatedWithMemory); |
| 22 } |
| 23 |
| 24 ProcessesAPIService::~ProcessesAPIService() { |
| 25 } |
| 26 |
| 27 // static |
| 28 ProcessesAPIService* ProcessesAPIService::Get(Profile* profile) { |
| 29 return ProcessesAPIServiceFactory::GetForProfile(profile); |
| 30 } |
| 31 |
| 32 void ProcessesAPIService::OnListenerAdded(const std::string& event_name) { |
| 33 if (!processes_event_router_) |
| 34 processes_event_router_.reset(new ProcessesEventRouter(profile_)); |
| 35 // We lazily tell the TaskManager to start updating when listeners to the |
| 36 // processes.onUpdated or processes.onUpdatedWithMemory events arrive. |
| 37 processes_event_router_->ListenerAdded(); |
| 38 } |
| 39 |
| 40 void ProcessesAPIService::OnListenerRemoved(const std::string& event_name) { |
| 41 // If a processes.onUpdated or processes.onUpdatedWithMemory event listener |
| 42 // is removed (or a process with one exits), then we let the extension API |
| 43 // know that it has one fewer listener. |
| 44 processes_event_router_->ListenerRemoved(); |
| 45 } |
| 46 |
| 47 } // namespace extensions |
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