Isolated FS for media devices.

chrome/browser/intents/device_attached_intent_source.cc

 // Copyright (c) 2012 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/intents/device_attached_intent_source.h"
 
 #include <string>
 
 #include "base/file_path.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "content/public/browser/web_intents_dispatcher.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "webkit/fileapi/file_system_types.h"
 #include "webkit/fileapi/isolated_context.h"
 #include "webkit/glue/web_intent_data.h"
+#include "webkit/fileapi/media/media_file_system_config.h"
+
+#if defined(SUPPORT_MEDIA_FILESYSTEM)
+#include "webkit/fileapi/media/media_device_map_service.h"
+
+using fileapi::MediaDeviceMapService;
+#endif
 
 using base::SystemMonitor;
 using content::WebContentsDelegate;
 
 DeviceAttachedIntentSource::DeviceAttachedIntentSource(
     Browser* browser, WebContentsDelegate* delegate)
     : browser_(browser), delegate_(delegate) {
   SystemMonitor* sys_monitor = SystemMonitor::Get();
   if (sys_monitor)
     sys_monitor->AddDevicesChangedObserver(this);
 }
 
 DeviceAttachedIntentSource::~DeviceAttachedIntentSource() {
   SystemMonitor* sys_monitor = SystemMonitor::Get();
   if (sys_monitor)
     sys_monitor->RemoveDevicesChangedObserver(this);
 }
 
 void DeviceAttachedIntentSource::OnMediaDeviceAttached(
     const std::string& id,
     const string16& name,
     base::SystemMonitor::MediaDeviceType type,
     const FilePath::StringType& location) {
   if (!browser_->window()->IsActive())
     return;
 
   // Only handle FilePaths for now.
+  // TODO(kmadhusu): Handle all device types. http://crbug.com/140353.
   if (type != SystemMonitor::TYPE_PATH)
     return;
 
   // Sanity checks for |device_path|.
   const FilePath device_path(location);
   if (!device_path.IsAbsolute() || device_path.ReferencesParent())
     return;
 
+  // Store the media device info locally.
+  SystemMonitor::MediaDeviceInfo device_info(id, name, type, location);
+  device_id_map_.insert(std::make_pair(id, device_info));
+
   std::string device_name;
 
   // Register device path as an isolated file system.
   // TODO(kinuko, kmadhusu): Use a different file system type for MTP.
   const std::string filesystem_id =
       fileapi::IsolatedContext::GetInstance()->RegisterFileSystemForPath(
           fileapi::kFileSystemTypeNativeMedia, device_path, &device_name);
 
   CHECK(!filesystem_id.empty());
   webkit_glue::WebIntentData intent(
       ASCIIToUTF16("chrome-extension://attach"),
       ASCIIToUTF16("chrome-extension://filesystem"),
       device_name,
       filesystem_id);
 
   delegate_->WebIntentDispatch(NULL  /* no WebContents */,
                                content::WebIntentsDispatcher::Create(intent));
 }
+
+void DeviceAttachedIntentSource::OnMediaDeviceDetached(const std::string& id) {
+  DeviceIdToInfoMap::iterator it = device_id_map_.find(id);
+  if (it == device_id_map_.end())
+    return;
+
+  // TODO(kmadhusu, vandebo): Clean up this code. http://crbug.com/140340.
+
+  FilePath path(it->second.location);
+  fileapi::IsolatedContext::GetInstance()->RevokeFileSystemByPath(path);
+  switch (it->second.type) {
+    case SystemMonitor::TYPE_MTP:
+#if defined(SUPPORT_MEDIA_FILESYSTEM)
+      MediaDeviceMapService::GetInstance()->RemoveMediaDevice(
+          it->second.location);
+#endif
+      break;
+    case SystemMonitor::TYPE_PATH:
+      break;
+  }
+  device_id_map_.erase(it);
+}