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/media_galleries/fileapi/mtp_device_map_service.h" 6 7 #include <string> 8 #include <utility> 9 10 #include "base/stl_util.h" 11 #include "chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.h" 12 #include "webkit/browser/fileapi/isolated_context.h" 13 14 namespace chrome { 15 16 namespace { 17 18 base::LazyInstance<MTPDeviceMapService> g_mtp_device_map_service = 19 LAZY_INSTANCE_INITIALIZER; 20 21 } // namespace 22 23 // static 24 MTPDeviceMapService* MTPDeviceMapService::GetInstance() { 25 return g_mtp_device_map_service.Pointer(); 26 } 27 28 ///////////////////////////////////////////////////////////////////////////// 29 // Following methods are used to manage MTPDeviceAsyncDelegate objects. // 30 ///////////////////////////////////////////////////////////////////////////// 31 void MTPDeviceMapService::AddAsyncDelegate( 32 const base::FilePath::StringType& device_location, 33 MTPDeviceAsyncDelegate* delegate) { 34 DCHECK(thread_checker_.CalledOnValidThread()); 35 DCHECK(delegate); 36 DCHECK(!device_location.empty()); 37 if (ContainsKey(async_delegate_map_, device_location)) 38 return; 39 async_delegate_map_[device_location] = delegate; 40 } 41 42 void MTPDeviceMapService::RemoveAsyncDelegate( 43 const base::FilePath::StringType& device_location) { 44 DCHECK(thread_checker_.CalledOnValidThread()); 45 AsyncDelegateMap::iterator it = async_delegate_map_.find(device_location); 46 DCHECK(it != async_delegate_map_.end()); 47 it->second->CancelPendingTasksAndDeleteDelegate(); 48 async_delegate_map_.erase(it); 49 } 50 51 MTPDeviceAsyncDelegate* MTPDeviceMapService::GetMTPDeviceAsyncDelegate( 52 const std::string& filesystem_id) { 53 DCHECK(thread_checker_.CalledOnValidThread()); 54 base::FilePath device_path; 55 if (!fileapi::IsolatedContext::GetInstance()->GetRegisteredPath( 56 filesystem_id, &device_path)) { 57 return NULL; 58 } 59 60 const base::FilePath::StringType& device_location = device_path.value(); 61 DCHECK(!device_location.empty()); 62 AsyncDelegateMap::const_iterator it = 63 async_delegate_map_.find(device_location); 64 return (it != async_delegate_map_.end()) ? it->second : NULL; 65 } 66 67 68 MTPDeviceMapService::MTPDeviceMapService() { 69 } 70 71 MTPDeviceMapService::~MTPDeviceMapService() {} 72 73 } // namespace chrome 74
